• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    ABSTRACT Catheter assemblies (100, 200, 210, 240, 270) are described having a catheter hub (102)With a catheter tube (104) and a needle hub (106) With a needle (108) proj ecting through thecatheter tube (104). The catheter hub (102) has at least two sea1s With at least one being atemporary seal that ends or terminates upon movement of a needle (108) and/or a guard (114,202, 212, 242, 272). Different needle guards (114, 202, 212, 242, 272) are provided that can beseated differently Within the catheter hub (102) to seal against the elastic seal (170). 27
    公开号:SE537810C2
    申请号:SE1450964
    申请日:2014-03-13
    公开日:2015-10-20
    发明作者:Kevin Woehr
    申请人:Braun Melsungen Ab B；
    IPC主号:
    专利说明:

    TECHNICAL FIELD Catheter units are generally discussed below for intravenous venipuncture with more specific discussions of IV catheter units with a duct or needle guard and blood vessels to restrict blood flow.
    BACKGROUND The insertion procedure for an IV catheter assembly (IVC) involves four basic steps: (1) medical staff insert the catheter and catheter together into the patient's yen, (2) after insertion into the vein of the needle tip, the catheter is pushed forward into the patient's yen by the medical staff. or her finger, (3) the medical staff pulls the needle back by grasping the spirit of the catheter hub while simultaneously applying pressure to the patient's yen distal to the catheter to stop the flow of blood through the catheter with his free hand, and (4) the medical staff then tapes it. Insert the catheter into the patient's skin and connect the exposed end of the catheter (katetemayet) to the Ulan for the fluid to be administered into the patient's vein.
    The problem is that immediately after the withdrawal of the needle from the patient's vein, the medical staff must place the exposed tip of the needle on a nearby site and deal with the tasks required in points (3) and (4) above. It is at this point that the exposed teddy bear tip poses a risk of an unintentional teddy bear bite, which, under these circumstances, makes the medical staff susceptible to the transmission of various dangerous blood-borne pathogens, including AIDS and hepatitis, frail an unintentional teddy bear sting.
    If further problems arise if the medical staff that the inf. & IV catheter stops applying pressure to the vein to use a second hand for step (4) above. This can increase the risk of infection in the patient and cause more work for the medical staff to support the blood that may leak from the open catheter hub.
    Other types of needles similarly expose healthcare professionals to the risk of accidental needle sticks. For example, a physician who has administered an injection with a straight needle, a Huber needle, an infusion needle with a wing, etc., may place the other needle on a tray for later disposal by a nurse. Meanwhile, if the needle is placed on a washer or workstation at the time it is discarded, the needle is a potential source of disease transmission for those working near or around the needle. Therefore, all needles should be thanked when the needle is withdrawn from the patient to ensure greater safety for the staff. Under ideal conditions, the procedure for thanking the needle tip is passive, self-activating or at least easy to perform. In addition, the device for covering the needle should be reliable and robust.
    SUMMARY The features of the present invention generally relate to an IV catheter assembly with a needle guard for covering the needle tip after successful venipuncture. To facilitate use, the present invention further comprises an elastic seal to restrict blood flow through the inner cavity of the catheter hub. The needle guard, described in Rh use together with a catheter unit, is also usable for different types of needle without a catheter with an included needle, such as for blood collection, Seldinger, introducer or for biopsinals, among others.
    An exemplary aspect of the present invention comprises a catheter assembly comprising a catheter hub having a catheter tube having a tubing, said catheter hub comprising a body defining an inner cavity comprising a first inner diameter portion distal to a second inner diameter portion and said said first inner diameter having an inner inner diameter portion. inner diameter portion. The unit further includes a squeegee hub with a squeegee with a squeegee tip, a nominal squeegee diameter and a squeegee shaft projecting through the catheter hub and the catheter tube behind the squeegee tip extends distally about the squeegee edge of a vessel. An elastic seal may be inclined to a shoulder in the inner cavity of the catheter hub, said elastic seal comprising an outer diameter and an inner diameter and said inner diameter being sufficiently larger than the nominal needle diameter so that the needle shaft does not come into contact with the inner diameter. the diameter of the elastic seal in the finished layer. A squeegee guard to thank the squeegee tip in a protective sleeve can be arranged in the inner cavity of the catheter hub and be in contact with the elastic seal, a temporary seal to limit the wash flow being formed at a point where the squeegee guard is in contact with the elastic seal.
    Catheter unit wherein the needle guard comprises a cap which comprises a dome surface and wherein the dome surface is axially loaded against the elastic seal. The dome surface may further comprise a distal cradle which is in contact with the elastic seal. 2 537 8 Catheter unit in which a temporal seal can terminate or close when the needle guard moves in a proximal direction away from the elastic seal, at which point liquid can flow freely through the inner diameter of the elastic seal.
    Catheter unit wherein the elastic seal can be compressed inside a recess which is arranged in the inner cavity of the catheter hub and wherein the recess comprises the shoulder.
    The catheter assembly wherein the needle guard may comprise a sleeve comprising an inner diameter, an outer diameter and a length, and wherein a profile change formed near the needle tip has a larger cross-sectional mat than the inner diameter of the sleeve.
    Catheter unit wherein the needle guard may comprise a surface which is in contact with the needle shaft and wherein the surface which is in contact has a bellows fitted to reduce friction as the needle shaft moves against the surface.
    The catheter assembly may further comprise a mounting tool comprising a longitudinal channel for pushing the cover into the inner cavity of the catheter hub.
    Catheter assembly wherein the needle guard may further comprise an arm comprising an angle which is in contact with the inner surface of the catheter hub.
    Another aspect of the present invention comprises a catheter assembly comprising a catheter hub having a catheter tube with a tube, said catheter hub comprising a body defining an inner cavity having an inner surface having an inner shoulder and a needle hub having a needle having a needle tip, a nominal needle diameter and a squeegee shaft projecting through the catheter hub and catheter tube so that the tip of the squeegee extends distally about the tube edge in a sheath. An elastic seal is inclined to the inner shoulder of the inner cavity of the catheter hub, said elastic seal comprising an outer diameter, an inner diameter and a side surface disposed between the inner and outer diameters and said inner diameter being sufficiently larger than the nominal diameter. the needle diameter so that the needle shaft does not come into contact with the inner diameter of the elastic seal in the finished layer. A squeegee guard for thanking the squeegee tip in a protective layer is arranged in the inner cavity of the catheter hub, said squeegee guard comprising a distal cradle having a distal opening and a distally facing surface in contact with the side surface of the elastic seal and a temporal seal for limit the liquid flow formed at a point where the needle guard is in contact with the side surface of the elastic seal. A catheter assembly wherein the inner cavity of the catheter hub may comprise a first inner diameter portion distal to a second inner diameter portion and wherein the first inner diameter portion is larger matte than the second inner diameter portion.
    Catheter unit wherein the second inner diameter portion may comprise an annular projection.
    Catheter unit wherein the first inner diameter portion may comprise an annular groove.
    The catheter assembly may further comprise a hydrophobic filter mounted at the distal opening in the distal cradle of the squeegee guard to at least partially thank the distal opening.
    Catheter assembly wherein the needle guard may comprise a cap, an arm, a proximal cradle, a distal cradle and a curved angle, and wherein the curved angle is in contact with the catheter hub. The catheter assembly may further comprise microchannels formed on the elastic seal. Catheter unit wherein the squeegee may further comprise a profile change ring which is arranged proximal to the squeegee tip.
    A further aspect of the present invention is a method of making a catheter assembly. As shown, the method may comprise the steps of forming a catheter hub with a catheter tube with a rudder, said catheter hub comprising a body defining an inner cavity having an inner surface with an inner shoulder and forming a needle hub with a needle having a needle tip. a nominal needle diameter and a squeegee shaft projecting through the catheter hub and catheter tube so that the tip of the squeegee extends distally about the tube edge in a tool holder. The method may further comprise placing an elastic seal in the inner cavity of the catheter hub and against the inner shoulder, said elastic seal comprising an outer diameter, an inner diameter and a side surface disposed between the inner and outer diameters and wherein said inner diameter is sufficiently large stone of the nominal needle diameter so that the needle shaft does not come into contact with the inner diameter of the elastic seal in the finished layer and to place a needle guard to thank the needle tip in a protective layer in the inner cavity of the catheter hub and in contact with it. elastic padding. The method may also include the step of forming a temporary seal to limit the flow of liquid through the elastic seal at a point where the nal guard is in contact with the elastic seal.
    A method wherein the squeegee guard may have a distal cradle having a distal opening and a distally facing surface and wherein the distally facing surface is in contact with the elastic seal. The method may further comprise pushing the cover into the inner cavity of the catheter hub with a mounting tool comprising a longitudinal channel.
    The method may further comprise a hydrophobic filter mounted at the distal opening in the squeegee guard.
    The method may further comprise pressing the cover so that an outer surface of the cover tilts against the inner diameter of the elastic seal.
    The method may further comprise applying a coating to a surface of the squeegee guard which is in contact with the squeegee shaft.
    A method in which the needle guard can exert a force on a distally sloping surface of the interior of the catheter hub to force the needle guard against the elastic seal.
    BRIEF DESCRIPTION OF THE DRAWINGS These and other aspects and advantages of the present apparatus, system and method will be appreciated when understood by reference to the description, claims and the accompanying drawings, in which: FIG. 1 is a cross-sectional side view of an IV safety catheter disposed in accordance with aspects of the present device, system and method.
    FIG. 2 is a cross-sectional side view of the squeegee hub of FIG. 1 with the teddy bear tip thanks to the teddy bear guard according to FIG. 1.
    FIG. 3 is an enlarged view of the squeegee guard of FIG. 2.
    FIG. 4 is a cross-sectional view from the side of an alternative IV safety catheter disposed in accordance with aspects of the present device, system and method.
    FIG. 5 is a cross-sectional side view of another alternative IV safety catheter disposed in accordance with aspects of the present device, system and method.
    FIG. 6 as a view of FIG. 5 taken along line and F6-F6.
    FIG. 7 is a plan view of a punched metal plate which can be used to form a squeegee guard.
    FIG. 8 is a cross-sectional side view of yet another alternative IV safety catheter disposed in accordance with aspects of the present device, system and method. 537 8 FIG. 9 is a cross-sectional side view of the IV safety catheter of FIG. 8 with the squeegee guard activated to block the squeegee tip.
    FIG. 10 is a cross-sectional view of FIG. 9 days along the line F10-F10.
    FIG. 11 is a cross-sectional view from the side of a further alternative IV safety catheter disposed in accordance with aspects of the present device, system and method.
    FIG. 12 is a cross-sectional side view of the IV safety catheter of FIG. 11 with the teddy bear guard activated to block the teddy bear tip.
    FIG. 13 is a side view of a mounting tool arranged in accordance with aspects of the present device, system and method.
    FIG. 14 is a view of the mounting tool of FIG. 13 days along the line F14-F14.
    FIG. 15 is a cross-sectional view from the side of the mounting tool of FIG. 14 days along line and F15-F15.
    DETAILED DESCRIPTION The detailed description given below together with the accompanying drawings is intended to be a description of presently preferred embodiments of intravenous safety catheters or IV safety catheters arranged in accordance with aspects of the present device, system and method and is not intended to show the only embodiments in which the present device, system and method can be designed or used. The description 20 sets forth the features and steps for designing and using the embodiments of the present device, system, and method in connection with the embodiments shown. It is to be understood, however, that the same or equivalent features and structures may be provided by various embodiments which are also intended to be included within the spirit and scope of the present description. As designated elsewhere, similar reference numerals shall refer to the same or similar elements or features. The housing seals and protection can also be used for other needles without a catheter with an included needle. For example, a sharp probe for a biopsinal may be provided with the described seals and protections in the biopsinal's nay. Likewise, the catheter tube can be removed if the friction-reducing features are used with the needle guards for blood collection or Seldinger or introducer needles. With reference now to FIG. 1, there is shown an IV safety catheter 100 which includes a catheter hub 102 having a catheter tube 104 attached thereto and a needle hub 106 having a needle 108 projecting through the catheter hub and catheter tube in a sheath, which is intended to be ready for use. to perform a venipuncture. The catheter hub 106 comprises a hub body 1 which defines an inner cavity 112 which has a needle guard or duck guard 114 arranged therein.
    Similarly, the needle hub 106 has a hub body 116 defining an inner cavity or return chamber 119 having a proximal opening with a female Luer cone. An air-permeable vent plug (not shown) may be located or attached to the proximal opening of the return chamber of the needle hub to prevent blood flow from the needle hub when the unit is in use, for example after successful venipuncture.
    At the distal spirit of the needle hub 106, a muzzle portion 118 projects into the proximal female Luer opening of the catheter hub 102 and is stopped by the proximal end face 120 of the catheter hub abutting the distal shoulder 122 of the needle hub 106. This physical stop allows proper axial placement of the needle tip. 124 in relation to the distal spirit of the catheter tube 104. In other examples, the muzzle portion 118 may be omitted and alignment of the needle tip in relation to the catheter tube is still possible through the abutting surfaces 120, 122. Radial alignment between the catheter hub 102 and the needle hub 106 may be accomplished by using external alignment means, such as the axially extending tongue 123 which abuts the outer surface of the catheter hub 102. As also shown in FIG. 1 there are outer passages 126 fault passage engages with a threaded collar, such as the collar of an IV hose adapter.
    In one example, the nose portion 118 has an axially extending tongue 128 for pushing the needle guard 114 distally into position in the inner cavity 112 of the catheter hub 102 during assembly. Although not shown, the tongue 128 is sized and shaped to press the needle guard and remain in abutting contact with the proximal spirit of the needle guard 114. The needle guard is in place, as discussed further below. Alternatively, a mounting tool having a longitudinal slot or channel may be used to push the cover 114 into position if the running tongue 128 has not been incorporated or is not raft size. As discussed further below, the longitudinal slot on the mounting tool allows the tool to be mounted laterally over the needle to push the guard into place without having to push the tool onto the needle free only the spirit of the needle tip. Selection is the same longitudinal slot on the mounting tool used to separate the tool laterally from the needle 108.
    In the example shown, the inner cavity 112 of the catheter hub 102 includes an annular projection 130 which forms a reduced inner cross-sectional mat of the catheter hub. It is to be understood that the inner hall tube 112 includes a reduced inner portion 130 just upstream or distal of a relatively stone inner portion 132. Alternatively, the nominal inner diameter is distal or upstream of the projection relative to the reduced diameter portion. In other words, the catheter hub has a relatively stone inner diameter upstream of a portion with a smaller inner diameter. In another example, an annular recess or recess is provided in the housing of an inner projection 130. Thus, distal to the recess 130 or with the recess extending, a recess or recess may be provided in the alternative embodiment to retain the needle guard in the catheter hub. The recess or recess can be regarded as a relatively stone inner portion upstream or distal of a relatively smaller inner portion, which can be seen as the normal inner inner portion. A combination of savings and committees, as shown, can also be used.
    Referring again to FIG. 1, with the addition of FIG. 3, then the teddy bear guard 114 includes a cap 134 and an arm 136 extending distally about a proximal cradle 138. The distal tether 140 is disposed at one side of the arm 136 to block the teddy bear tip 124 in a protected or protective lase shown in FIG. FIG. A curved angle 142 is also provided opposite a curved flange 144. The cap 134, the arm 136, the proximal wall 138 and the distal tube 140 may be formed as a single or monolithic unit. In another example, the cover 134 may be formed separately from the arm 136, the proximal cradle 138 and the distal wall 140. In a further example, the distal cradle may be formed separately and attached to the arm. In a further example, the distal cradle 140 and the arm 136 may be replaced by another arm extending from the side cradle 148 of the hood, to form a cutout on the hood to form a leaf spring to bias the needle. This second arm extending from the side cradle of the cap may function by tilting or angling the needle tip 124 within the inner cavity of the cap 134 so that the tip 124 is moved out of alignment and cannot protrude again from the distal opening 150 in the distal cradle 152 of the cap. hood 134, which has a dome or dome-like shape with rounded horns. In other examples, the distal wall 152 is substantially planar and has straight horns. As shown, an arm opening 154 is provided on the arm 136 between the proximal cradle 138 and the distal cradle 140 to allow the needle to pass therethrough. In an alternative embodiment, the arm opening 154 is omitted and the arm 136 extends from the upper proximal cradle portion 156, distal but parallel to the squeegee 108, and the distal cradle 140 does not extend from the modified arm and is in contact with the squeegee shaft with feed bias.
    As discussed further below with reference to FIG. 7 and referring to the above, the squeegee guard 114 may be made of or formed of a pressed metal plate, such as a pressed stainless metal plate. The distal cradle 152 and the side cradle 158 of the hood can be formed by placing the pressed plate against a mold under relatively high pressure in an embossing process. Depending on the edge that forms the dividing line and the shape of the pressed plate, different needle guards can be embossed. The cover may further include a sidewall opening 162 to allow the curved angle 142 to thereby project into the finishing layer of FIG. 1.
    Again with reference to FIG. 1a, an elastic seal 170 is provided in the inner cavity 112 of the catheter hub. In one example, a recess or recess 172, including at least one shoulder, is formed in the inner cavity 112 to receive the elastic seal 170. As shown, two are provided. approaches. The elastic seal 170 is pressed into the recess 172 and forms a tattling against the surface of the recess 172, such as the shoulder, with its outer diameter or outer surface 173. In one example, the elastic seal 170 is an o-ring of elastomer, such as an o-ring. ring of silicone or an o-ring of synthetic rubber. The seal between the elastic seal 170 and the recess 172 is sufficiently liquid-chained to prevent blood from passing through it, which after successful puncture allows blood to flow into the interior of the catheter hub through the annular space between the catheter tube 104 and the needle 108 in a so-called secondary blood flow.
    As shown, the elastic seal 170 has an inner diameter or inner surface 174 and a side surface 176 which lies between the outer diameter and inner diameter surfaces 173, 174. The inner diameter 174 has been selected to have a size and shape to provide good clearance. around the squeegee.
    For example, the inner diameter 174 of the elastic seal should be selected with a sufficiently large mat so that it does not come into contact with the squeegee during use. Alternatively, the inner surface 174 of the elastic seal 170 may be in contact with and abut the needle shaft. In one example, the inner diameter may be dimensioned to be about 1.5 times to about 3 or more times the diameter of the Wen. In one example, the side surface 176 of the elastic seal 170 is configured to abut the distal cradle surface 178 of the cap 134 of the needle guard 114. For example, when the needle guard 114 is disposed within the catheter hub and pressed against the elastic seal 170, a sealing between the distal yag surface 178 and the elastic rock side side surface 176 of the elastic seal to prevent or restrict blood flow thereOver. As further discussed below, the pad seal with the squeegee guard 114 is a temporal seal that terminates or ends upon proximal movement of the squeegee guard.
    As previously discussed, the axial tongue 128 on the nose portion 118 of the needle hub is configured to push the needle guard 114, such as the proximal cradle 138 of the guard, distal within the catheter hub to position the guard against the elastic seal 170. In another example, the guard is pressed distally using a mounting tool, which is further discussed below with reference to FIG. 13 and 14. The distal cradle 152 of the squeegee cover 114 must therefore have a cross-sectional mat as a stone to the inner diameter 174 of the elastic seal 170 to abut the side surface 176 of the elastic seal, between the inner diameter and the outer diameter. In another example, the distal spirit of the sheath 134 is sufficiently small to project into, and a portion of the sheath 134 just proximal to the distal cradle 152 of the sheath will abut the inner diameter of the elastic seal 170.
    In one example, the curved flange 144 and the curved angle 142 abut the squeegee 108 and the inner surface 146 of the catheter hub 102, respectively, to axially secure the squeegee guard 114 within the catheter hub and to press against the elastic seal 170. The curved angle 142 may project through the cover 134 via a side opening 162 formed in the body of the cover, which is further discussed below with reference to FIG. In one example, the arm surface 180 is arranged just proximal to the curved angle 142 (FIG. 3), such as to have a size and a shape, to abut the projection 130 or a groove in the catheter hub to retain the protection within the catheter hub. while retracting the squeegee until the squeegee tip 124 is moved proximally about the curved flange 144. The arm surface 180 or / or the projection 130 may also be sized and shaped or positioned so that the arm surface 180 and the projection 1 abut in the finished layer to maintain an axial load on the guard. 114 against the elastic seal 170.
    Thus, as shown in FIG. 1, the blood flow is blocked or at least restricted from flowing Over the gap between the elastic seal 170 and the groove 172 which holds the elastic seal 170 and the gap between the elastic seal 170 and the needle guard 114. In one example microchannels and / or microbulbs are arranged on the outer surface of the elastic seal 170 to allow air to be vented thereover between the elastic seal and the groove 172, but not large enough for blood to flow freely therebetween. Alternatively, or in addition, a seal (not shown), such as a hydrophobic filter, is placed at the opening 150 of the cap 134 of the squeegee guard 114 to allow ventilation but not blood flow. For example, a blade of hydrophobic filter 5 may be glued to the cap 134 at the opening 150 of the cap and the needle 108 may then penetrate therethrough during assembly. After successful venipuncture, air can be vented through the hydrophobic filter but not blood to allow for secondary blood flow. During retraction of the needle from the catheter hub after use, the tail of the hydrophobic filter formed by the needle may also act as a dryer to dry blood from the outer surface of the needle. The hydrophobic filter thus allows air to be vented to allow blood flow while at the same time having the wiping function of drying blood from the outer surface of the squeegee when the squeegee is withdrawn during removal of the squeegee after successful venipuncture. Examples of hydrophobic filters include those made of spunbonded PP, PTFE fibers, or PCTE (Track Etch membrane of carbonate plastic), which have pores that are small enough to allow air to be vented over them but not blood.
    As described, the present device, system, and method will comprise a catheter assembly comprising a catheter tube attached to a catheter hub, which includes a body defining an inner cavity. A squeegee comprising a squeegee tip is attached to a squeegee hub and projects through the catheter hub and catheter tube in a craft. An elastic seal and a needle guard shaft 20 are provided in the inner cavity of the catheter hub. The needle guard may be positioned within the catheter so that it rests, abuts or otherwise is pressed by the elastic seal in a finish to form a temporary seal with the elastic seal that terminates or terminates upon proximal movement of the needle guard. Thus, the present unit comprises a seal between a catheter hub and an elastic seal and between the elastic seal and a squeegee guard. In another example, a seal is provided at a distal orifice to form a third tab with the needle within the catheter hub. In the same way as the seal with the needle guard, the third seal also has a temporal seal that ends or ceases when the needle is moved proximally about the third seal. In some examples, the seal between the elastic seal and the catheter hub may also be a temporal seal and may allow lacquers to float over it when a load or pressure is released or removed from the elastic seal. The unit can therefore be considered to comprise an IV catheter with a permanent seal and two temporary seals that cease. If the elastic seal is applied to the catheter hub only by external load, the unit can be considered to comprise three temporary inserts.
    During catheterization, blood will flow back into the cavity 119 of the needle hub 106 but be prevented from spilling out of the hub 106 through a vent plug (not shown). On similar salt, blood will flow back into the distal cavity chamber 182 of the catheter hub 102, distal to the elastic seal 170, but not flow freely or at all into the proximal chamber of the catheter hub 102 until the needle guard is moved from its capillary, such as the needle guard. is moved away from the elastic seal 170. In one example, the temporal seal may be terminated by first withdrawing the needle hub 106 and the needle 108 from the catheter hub 102 and the catheter tube 104, e.g. by holding the catheter hub while retracting the needle hub in a proximal direction. The nthal 108 is retracted, a bulge, profile or sleeve 184, generally called a profile change ring, is moved toward the distal side of the proximal wall 138 of the nal guard and stopped by a circumference defining an opening 186 in the proximal cradle.
    The profile change 184 has a larger cross-sectional area than the opening 186 in the proximal cradle 138 and therefore, in view of the profile change 184, the needle guard 114 presses against the proximal wall in the proximal direction. As the needle guard 114 is moved in the proximal direction, it is moved away from the finishing layer and the seal between the guard 114 and the elastic seal 170 ceases, stops or is interrupted by other salt. In other examples, the profile change is eliminated and the squeegee guard is provided with at least two openings through which the squeegee passes. In the protective layer, the protection is bent so that the two openings are inclined to grip against the outer surface of the squeegee without the profile change. As shown in FIG. 1 is the curved angle 142 slightly distal to the projection 130. It is understood that if the curved angle engages the distally sloping side of the projection 130 then there will be a constant distally directed force which pushes the needle guard into contact with the elastic seal 170. In this case, contact with axially extending tongue 128 is not maintained and axially extending tongue 128 can be removed.
    FIG. 2 is a cross-sectional side view of the squeegee hub 106, squeegee 108, and squeegee guard 114 of FIG. 1 after being removed from the catheter hub 102 after successful venipuncture. As shown, the arm 136 on the guard 114 is moved in a radial direction to move the distal stem 1 distal to the needle tip 124 to block the needle tip. In an alternative embodiment, the profile change 184 is fired and a fixing device is used instead and is connected at its two ends to the needle hub and guard. The fixing device is configured to pull the needle guard by moving the needle hub 106 in the proximal direction to remove the guard from the catheter hub. The fixing device, if used, would also prevent the cover from falling distally from the flirting needle. In other words, the fixing device prevents the teddy bear tip from pulling through the teddy bear guard.
    During removal of the squeegee 108 from the catheter hub 102, as then moving the squeegee from the layer shown in FIG. 1 to that shown in FIG. 2, the squeegee shaft is pulled over the curved flange 144 of the squeegee guard 114 while the squeegee guard is held relatively stationary until the squeegee tip moves proximally about the curved flange 144. Depending on the design of the curved flange 144, a relatively large resistance may be felt by the user. The friction can also cause the guard 114 to move slightly proximally until the arm surface 180 adjacent the curved angle 142 of the squeegee guard 114 is in contact with the projection 130 in the catheter hub. While the friction between the squeegee shaft and the curved flange 144 is minimal compared to if the distal cradle 140 is left with a blunt spirit to be in contact with the side of the squeegee shaft, in one example a friction reducing mechanism is provided to further reduce the friction between the squeegee and nal protection. As shown in FIG. 3, which is an enlarged view of FIG. 2 taken at A, a coating 188 is applied over at least a portion of the distal rock 140 and the curved flange 144. The coating 188, which is made of a different material from the distal rock 140 and the curved flange 144, may be applied thereto. pressed metal sheets for folding or forming the sheets into a cover or can be applied after the forming step to form the cover. In one example, the coating 188 is made of a polyethylene (PE) material. In another example, the coating 188 is made by l'EFLON. The coating 188 reduces the coefficient of friction of the cover 114, which means that the cover may be formed without the curved flange 144, i.e. leaves the distal cradle 140 with a blunt spirit. The cover 114 with the coating 188 to reduce the coefficient of friction of the cover represents a further aspect of the present device, system and method apart from the catheter unit and apart from the catheter unit with an elastic seal 170. In other words, when the cover 114 is in contact with the needle 108 and when friction can be felt during proximal movement to separate the frail catheter hub, a coating 188 can be paforas to reduce the friction and thus the resistance experienced then! Alen is Moved Over the stationary surfaces of the needle guard. Thus, another aspect of the present device, system and method is to comprise a squeegee guard 114 having a coating 188 to reduce the coefficient of friction of the guard. In a further aspect of the present device, system and method, the cover 114 includes a cap 134 including a distal cradle 152 having an opening 150. The cover may also include an arm extending 136 distal to a proximal cradle 138 and having a distal cradle 1 with the coating 188 applied at least partially darpa. According to a further aspect of the present device, system and method, the protection with the coating can be used with a catheter unit in 1V safety catheter device. The catheter assembly may further comprise an elastic seal and the cover may further comprise a cap for abutment against the elastic seal, such as that shown in FIG. 1.
    Referring now to FIG. 4 shows an alternative catheter unit 200, which is similar to the catheter unit 100 in FIG. 1 with some exceptions. Thus, the catheter assembly 200 includes a needle hub 106 with a needle 108 and a catheter hub 102 with a catheter tube 104. The catheter hub further includes a cavity 112 that includes an elastic seal 170 and an iffile guard 202. As shown, the iffile guard 202 includes a cap 134 and an arm 136 which includes a distal cradle 140. In the present embodiment, the cover 202 is disposed in the inner cavity 112 of the catheter hub by biasing the distal spirit of the arm 136 toward the ifil file 108 and the inner surface of the catheter hub 102 as well as bringing a portion of a longitudinal portion of cap 134 in contact with the inner surface of the catheter hub. This allows the cover 202 to be arranged and abut against the elastic seal 170 by the action of both the arm 136 and the cap 134. In a preferred embodiment, a coating 188 is applied, at least in part, to the distal cradle 140 to reduce the coefficient of friction between the needle 108 and the distal spirit of the arm 136, such as the curved flange 144 against the iffile 108. In an alternative embodiment, the curved flange 144 and the distal spirit of the distal cradle 140, i.e. a blunt spirit, coated with the coating 188 dr in contact with the side of With reference now to FIG. 5 shows another alternative catheter assembly 210, which is similar to the catheter assembly 100 of FIG. 1 with a few exceptions. Thus, the catheter assembly 210 includes a squeegee hub 106 with a squeegee 108 and a catheter hub 102 with a catheter tube 104 and inner surface 146. A protrusion or spar is not shown but may be present and function as described above. The catheter hub 102 further includes a cavity 112 that includes an elastic seal 170 and a squeegee guard 212. As shown, the squeegee guard 212 includes a cap 134 and an arm 136 including a distal cradle 140. In the present embodiment, the guard 212 is disposed in the inner cavity. 112 by biasing the distal tip of the arm 136 against the needle 108 and the inner surface of the catheter hub as well as bringing a raised portion 214 of the sheath 134, the viii saga, a portion of the sheath 134, into contact with the inner surface of the catheter hub. This allows the cover 212 to be arranged and abut against the inner surface 146 of the catheter hub 102 at two points provided by the cap and the arm. Since only a relatively small portion of the sheath 134 is in contact with the inner surface of the catheter hub 102 compared to the embodiment of FIG. 4, which has a large longitudinal portion of the sheath in contact with the catheter hub, less force is required to remove the cover 212 from the catheter hub 102. In a preferred embodiment, a bellows 188 is mounted, at least in part, on the distal cradle 140 of the arm for to reduce the coefficient of friction between the squeegee 108 and the distal band of the arm 136, as between the curved flange 144 and the squeegee. In an alternative embodiment, the curved flange 144 and the distal Evil are fired by the distal cradle 140, i.e. a blunt spirit, coated with the coating 188, is in contact with the side of the squeegee.
    The bellows 188 may be sufficiently soft and thick to capture the tip of the needle in the protective layer (e.g.
    FIG. 2 and 3), so that the teddy bear tip cannot slide along the inner surface of the distal cradle 140. If a soft bellows is used which can catch the teddy bear tip, the flange 144 at one end of the distal cradle 140 may be omitted.
    FIG. 6 is a view of the catheter assembly of FIG. 5 days kings line F6-F6. As shown, the raised portion 214 extends radially outwardly from the main body of the cap 134 into contact with the inner surface 146 of the catheter hub 102. The curved angle 142 extends on similar salt radially outwardly into contact with the inner surface 146 of the catheter hub 102. As shown there is no protrusion or groove in or on the inner surface 146 of the catheter hub for clarity. The two contact points with the catheter hub 102 are configured to provide the needle guard 212 in the inner cavity of the catheter and in axial contact with the elastic seal 170. As also explained above, if the curved angle 142 were to engage a distally sloping portion of a catheter, spar or protrusion 130, is a constant distally directed force from the squeegee guard against the elastic pad 170. The proximal cradle 138 with the squeegee 108 disposed in the proximal opening 186 is shown in FIG. 6. 537 8 FIG. 7 is a plan view of a pressed metal plate 220 arranged in accordance with aspects of the present apparatus, system and method. The plate 220 includes a large portion or a first portion 222 and a relatively narrower portion or second portion 224. The first portion 222 has a first pressed cutout 150 and a relatively stone second pressed cutout 162. Then embossed with a mold, the first the recess 150 and the surface adjacent to the distal opening 150 and the distal cradle 152 icap 134 in FIG. 1-5. The first portion 222 may be different and / or the shape of another to give a cutting configuration of suitable size and shape for the intended application. Aperture 162 allows the curved angle 142 to project outwardly to contact the inner surface of catheter hub 146 (see, e.g., FIG. 1).
    The second portion 224 of the pressed metal plate 220 is configured to form the arm 136 and the distal cradle 140 of the guard of FIG. 1-5. The second portion 224 has a first notch 186 and a second notch 154. When folded, the first notch 186 and the surface adjacent the proximal cradle 138 and the proximal opening 186p form the nal guard. The second cut-out 154 of the pressed plate forms an opening (FIG. 3) in the arm 136 of the squeegee guard when it is weighted, which allows the squeegee to extend therethrough. The end portion 228 of the second portion 224 forms the distal cradle 140, the curved angle 142 and optionally the curved flange 144, which can be fired then incorporating a coating 188. The pressed metal plate 220 also includes a portion of medium width 225. The portion of medium width 225 is wider for aft include the opening 162, which must be wider than the second portion 224, so that the curved angle formed by the second portion 224 can pass therethrough. Optionally, a portion of the second portion 224 may be pressed even narrower than the rest of the second portion 224 so that the opening 162 and the portion of medium width 225 may be made relatively narrower.
    FIG. 8 is a cross-sectional side view of another alternative catheter assembly 240 disposed in accordance with aspects of the present device, system, and method similar to the catheter assembly 100 of FIG. 1 with a few exceptions. Thus, the catheter assembly 240 includes a squeegee hub 106 with a squeegee 108 and a catheter hub 102 with a catheter tube 104. The catheter hub further includes a cavity 112 that includes an elastic seal 170 disposed within an inner groove 172 and a squeegee guard 242. As shown, the squeegee guard 242 includes a cap. 244 and two arms 136, each including a distal cradle 140. The cover 242 of FIG. 8 is similar to the protection of FIG. 4-12 of the 30 U.S. publication with No. 2012/0 046 620 A1, published February 23, 2012, U.S. Ser. No. 16 537 8 13/257 572. As discussed in the '572 application, the cap 244 may be formed separately and then attached to the two arms 136, which are formed with the proximal cradle 138 having an opening 186 sized to stop a profile change 184 on the channel. 108. Curved flanges 144 are shown in the spirits of the two distal cradles, each of which may include a coating 188 to reduce the coefficient of friction between the guard and the squeegee.
    The dome has a distal dome portion 246 with a distal cradle including a distal opening 248 and a dome extension 250 (FIG. 9), which extends in the proximal direction to partially thank the distal spirit of the hollow cavity. The cover 244 further includes two stops 252 (only one shown) on each side of the needle.
    In one embodiment, the two angles 142 of the two arms 136 are arranged against the distally sloping surface of the annular projection 130, and / or alternatively in an annular groove, to force the protection forward so that the dome 246 abuts against the elastic seal 170 for to seal tempordrt however. In the finishing layer shown in FIG. 8 shows a first seal disposed between the elastic seal 170 and the annular groove 172 of the catheter hub and a second seal disposed between the elastic seal 170 and the dome 246, which is a temporary seal which may terminate upon retraction of the needle guard in the proximal direction. Furthermore, if a hydrophobic filter is provided at the distal opening 248 of the dome 246, a third temporal seal is provided to restrict, restrict or stop blood from flowing proximally past the filter to flow freely into the cavity portion 112 of the catheter hub and into in the squeegee guard 242.
    This third incidental seal may stop or cease upon removal of the needle from the hydrophobic filter.
    As shown, the axial tongue 128 on the nose portion 118 of the needle hub 106 projects toward the proximal cradle 138 and remains in contact with the proximal cradle. This configuration allows the protection of the catheter hub 102 to be provided by simply pushing the squeegee hub 106 forward to drive the proximal cradle 138 of the squeegee guard 242 forward. During the distal movement to provide the needle guard 242, the two angles 142 and the two arms 136 will bend when fed into contact with the annular projection or projection 130 within the catheter hub and return slightly after being moved distally about the smallest diameter portion of the catheter. the top of the projection 130. At the same time, the dome 246 comes into contact with the elastic seal 170 and will remain axially loaded against the elastic seal at 17 537 8 due to the contacts at the two angles 142 with the projection 130. In an alternative embodiment, a gap is arranged between the nose portion 118 and the proximal wall 138 of the finished layer. If gaps are present, the guard 242 may instead be provided by means of a mounting tool, as discussed further below, in place of being pressed by the axial tongue 128 on the nose portion.
    As described, the present device, system and method comprise a catheter assembly comprising a catheter tube attached to a catheter hub, which comprises a body defining an inner cavity. A squeegee comprising a squeegee tip is attached to a squeegee hub and protrudes through the catheter hub and catheter tube in a craft. An elastic tattoo and a squeegee guard are provided in the inner cavity of the catheter hub. The needle guard can be arranged inside the catheter so that it touches, adjoins, or otherwise pushes distally forward towards the elastic seal. In one example, two arms are provided and are biased against an annular projection and / or an annular recess formed in the inner cavity of the catheter hub to maintain an axial load on the elastic seal. The contact between the two arms and the annular projection allows the distally directed axial force to be transferred to the protection against the elastic seal. Thus, a first tabling is arranged between the catheter hub and the elastic tanning and a second temporary tabling is arranged between the elastic tether and the squeegee guard, which may cease or terminate upon removal of the guard in the proximal direction. In another example, a seal is provided at a distal orifice to form a third temporal seal in the catheter assembly. Thus, the catheter assembly is understood to have a seal to define or restrict the flow formed by a sheath portion of the needle guard being in contact with an elastic seal. Said seal is a temporary seal that stops or ceases upon displacement of a catheter component, such as a squeegee and / or guard.
    FIG. 9 is a cross-sectional side view of the catheter assembly 240 of FIG. 8 after the squeegee 108 is retracted and the squeegee tip 124 is moved proximally about both distal cradles 140. As can be seen, the two arms are no longer biased toward the side of the squeegee and bend radially. The distal cradles 140 are also moved in a radial direction in front of the teddy bear tip to block the teddy bear tip. During this procedure, the dome portion 246 of the cap 244 remains in contact with the elastic seal 170 I. & to maintain the seal until proximal movement of the squeegee from the point or position shown in FIG. At this moment, further proximal movement of the needle will cause the profile change 184 to project, or pull with perspective from the needle hub, toward the circumference of the proximal opening 186 to move the needle guard 242 proximally out of the catheter hub. Saledes as a seal arranged between the catheter hub and the elastic seal and another seal arranged between the elastic seal and the squeegee cover which can be terminated or ceased. In the present embodiment, the temporary seal remains intact even during initial nal movement in the proximal direction after successful venipuncture. In a particular example, the seal between the cover and the elastic seal comprises a seal between the cover of the cover and the elastic seal. Said temporary seal is terminated or broken only by the profile change on the needle in contact with a circumference defining an opening and movement of the circumference and / or the proximal cradle, and the armed needle guard, away from the elastic seal.
    FIG. 10 is a cross-sectional view of FIG. 9 days along the line F-F10. The present view clearly shows the annular recess 172, the elastic seal 170, the dome portion 246 of the squeegee guard 242, the opening 248 in the dome portion optionally with a hydrophobic filter and a portion of the distal cradles 140 at the end of the arms 136.
    Referring now to FIG. 11, there is shown a cross-sectional view flirting with another alternative catheter assembly 270 disposed in accordance with aspects of the present device, system, and method similar to catheter assembly 100 in FIG. 1 with a few exceptions. Thus, the catheter assembly 270 includes a needle hub 106 having a needle 108 and a catheter hub 102 having a catheter tube 104. The catheter hub further includes a cavity 112 comprising an elastic seal 170 located within an inner groove 172 and a needle guard 272. As shown, the needle guard 272 includes a sleeve 274 and an arm 278 extending distally & Tom. The cover 272 may be made of a pressed metal plate, similar to the pressed plate in FIG. 7. For example, the first pressed portion 222 may be rolled to form the sleeve 274 and the second pressed portion 224 may be folded to form the arm 278 extending distally around the sleeve. Thus, the sleeve has a dividing line 279 defined by the two edges of the first pressed portion 222. The arm 278 is shown with a continuously curved distal spirit 276 as opposed to a distinct angle, distal cradle and curved flange, similar to the cover of FIG. In an alternative embodiment, the arm may be folded at a distinct bend angle, distal cradle, and hook flange, similar to the guard of FIG. A coating 188 may be applied to the curved distal spirit 276 to reduce the coefficient of friction between the guard and the needle. In one example, the sleeve 274 is formed with a length, an outer diameter and an inner diameter. Preferably, the inner diameter of the sleeve 274 is sufficiently much larger than the outer diameter of the squeegee 108, but smaller than the largest cross-sectional mat of the profile change 184. This allows the squeegee 108 to move freely relative to the sleeve 274 but not the profile change 184, which is larger than the inner diameter of the sleeve and therefore will abut and be stopped by the distal spirit 280 of the sleeve. Thus, the profile change 184, when the needle 108 is retracted from the catheter shaft 102, as after successful venipuncture, will abut or strike the distal spirit 280 of the sleeve and will, in view of the profile change, press on the sleeve 274 to separate the frail. elastic seal 170, which is discussed more below.
    The elastic seal 170 includes an outer diameter 173, an inner diameter 174 and a side portion 176 spaced therebetween. As shown, the outer diameter of the sleeve 274 projects through the elastic seal 170 so that the inner diameter 173 of the elastic seal compresses and tightens against the outer surface of the sleeve 274. Thus, a seal is provided between the recess 172 and the elastic seal 170 and between the elastic seal 170 and the sleeve 274. To limit or prevent blood flow in the annular space between the needle 108 and the sleeve 274, medically safe lubricant or other benign inserts may be used to seal the annular space.
    The needle guard 272 can be installed inside the catheter hub 102 by first mounting the needle guard including the sleeve 274 on the needle 108 via the thickening 96 of the needle. If the profile change 184 has not been shaped or created before the cover has been mounted on! Alen, then the needle guard can be mounted over the needle via the needle tip. The elastic seal 170 is then placed over the sleeve 274 shown in FIG. 11. The combination of elastic seal 170 and guard 272 can then be pressed distally into position by means of a mounting tool, which is discussed further below with reference to FIG. 13 and 14. Alternatively, the same shape of the insertion tool may be formed on the nose portion 118 and the nose portion 118 may press the elastic seal and needle guard into the catheter hub. When the combination reaches the recess 172 with a shoulder in the inner cavity, a slightly higher resistance followed by a reduced resistance will indicate that the elastic seal 170 has been placed firmly inside the recess. 537 8 FIG. 12 is a cross-sectional view of the side of the needle hub 106 and line 108 spaced from the catheter hub of FIG. 11 with the teddy bear guard 272 activated at the teddy bear tip 124 to thank the teddy bear tip from unintentional teddy bear sticks. The engagement between the profile change 184 and the distal spirit 280 of the sleeve 274 prevents the sleeve from being moved further distally aboard by the squeegee. The curved distal duct portion 276 blocks the needle tip 124 and prevents inadvertent contact therewith.
    FIG. 13 is a side view of a mounting tool 284 arranged in accordance with aspects of the present description. The mounting tool includes an elongate body portion 286 having an outer diameter and an inner diameter. In some examples, the first spirit 288 and the second spirit 290 may have the same inner and outer mats. In other examples, the first spirit 288 and the second spirit 290 have different inner and outer mats. The length of the body portion 286 and the mat of the first duct 288 and the second duct 290 can be adjusted or modified based on the special needle guard or duct guard to be slid or installed inside the catheter hub. For example, the length may be selected to ensure proper rack width to push the cover and / or elastic seal sufficiently into the catheter hub and long enough to be gripped or manipulated from the outside of the hub. The tool 284 shown can be used to push one of the needle guards shown elsewhere into the front and into the catheter hub to provide protection against the elastic seal 170. The tool 284 may also be used for all catheter assemblies where the axial tongue 128 on the nose portion 118 at the teddy bear hub 106 has either not been incorporated or is too short to push the teddy bear guard sufficiently forward into the craft. A longitudinal channel 292 is provided on the body 286 to allow mounting of the tool 284 over the wire 108 without having to guide the tool 284 on the needle only at the needle tip 124 or the thickener 96.
    FIG. 14 is a view of the tool 284 of FIG. 13 taken along line and F14-F14. In one embodiment, the tool 284 is molded from a plastic material to include an internal step function. In another example, the tool is made of two parts, which comprise an outer cylinder with a channel and a separate step function.
    FIG. 15 is a cross-sectional side view of the tool 284 of FIG. 14 days along line and F15-F15. The tool has an insert 300, including stepped functions 302, 304 for use with the guard 272 of FIG. 11. In other examples, different shaped inserts can be used. The insert 300 may form part of the body 286 or be formed separately and attached to the outer shell 286. As shown, the stepped function includes a longitudinal step 302 and a rear plate 304. The longitudinal step 302 has a first pressure surface 306 and the rear plate 304 has a second pressure surface 308. The length and the second mats on the insert 300 are selected so that the insert is arranged over the sleeve 274 on the cover in FIG. 11 and the first pressure surface 306 is in contact with the elastic seal 170, while the second pressure surface 308 is in contact with the proximal spirit of the sleeve 274. When the tool 284 with the insert 300 is pressed forward, the two pressure surfaces 306, 308 simultaneously press the combination of elastic seal 170 and cover 272 in place within the catheter hub 102. Although limited embodiments of IV safety cannulas and other needles are described herein and their components have been specifically described and illustrated, many modifications and variations will be apparent to those skilled in the art. For example, the various catheter assemblies may comprise antimicrobial wound features into the elastic seal and the covers may be made of several components and / or include additional or other wound features. In addition, it is understood and contemplated that features discussed specifically for one embodiment of a catheter may not exist in another embodiment of a catheter, provided that the features are compatible. For example, the mounting tool discussed with reference to FIG. 11 and 12 are used to mount the cover of FIG. 1 with some modifications to the tool to fit the features of the cover. Accordingly, it should be understood that IV safety cannulas and their components, constructed in accordance with the principles of the described device, system and method, may be designed in other ways as specifically described. The invention is also defined in the appended claims. 22
    权利要求:
    Claims (21)
    [1] 1. A catheter assembly comprising: a catheter hub (102) with a catheter tube (104) having a tube end, said catheter hub (102)comprising a body (110) comprising an interior surface (146) defining an interior cavity (112)comprising a first inside diameter section distal of a second inside diameter section and whereinsaid first inside diameter section is larger in dimension than said second inside diameter section; a needle hub (106) with a needle (108) having a needle tip (124), a nominal needlediameter, and a needle shaft proj ecting through the catheter hub (102) and the catheter tube (104)such that the needle tip extends distally of the tube end in a ready position; an elastic seal (170) held against a shoulder in the interior cavity (112) of the catheter hub( 102), said elastic seal (170) comprising an outside diameter (173) and an inside diameter (174); a needle guard (114, 202, 212, 242, 272) for covering the needle tip in a protectiveposition located in the interior cavity (112) of the catheter hub (102) and in contact with theelastic seal (170); wherein said inside diameter (174) being sufficiently larger than the nominal needlediameter so that the needle shaft does not come in contact with the inside diameter (174) of theelastic seal (170) in the ready position, and wherein the needle guard (114, 202, 212, 242, 272) contacts the elastic seal (170) in theready position so that a seal for limiting fluid flow is formed between the needle guard (114, 202,212, 242, 272) and the elastic seal (170).
    [2] 2. The catheter assembly of claim 1, wherein the needle guard (114, 202, 212, 242)comprises a cap (134, 244) comprising a dome surface (152, 246) and wherein the dome surfaceis axially loaded against the elastic seal (170).
    [3] 3. The catheter assembly of claim 1, wherein the seal terminates when the needleguard (114, 202, 212, 242, 272) moves in a proXimal direction at which point fluid can freelyflow through the inside diameter (174) of the elastic seal (170).
    [4] 4. The catheter assembly of claim 1, wherein the elastic seal (170) is compressed inside a groove (172) comprising the shoulder. 23
    [5] 5. The catheter assembly of claim 1, Wherein the needle guard (272) comprises asleeve (274) comprising an inside diameter, an outside diameter, and a length and Wherein achange in profile (184) formed near the needle tip (124) has a larger cross-sectional dimensionthan the inside diameter of the sleeve (274).
    [6] 6. The catheter assembly of claim 1, Wherein the needle guard comprises a surface(140, 144, 276) that contacts the needle shaft and Wherein the surface that contacts has a coating(188) applied thereon to reduce friction When the needle shaft moves against the surface.
    [7] 7. The catheter assembly of claim 1, further comprising an installation tool (284)comprising a lengthWise channel (292) for pushing the guard (114, 202, 212, 242, 272) into theinterior cavity (112) of the catheter hub (102).
    [8] 8. The catheter assembly of claim 1, Wherein the needle guard (114, 202, 212, 242,272) comprises an arm (136) comprising an elbow (142) that contacts the interior surface (146)of the catheter hub (102).
    [9] 9. The catheter assembly of claim 1, Wherein the needle guard (114, 202, 212, 242,272) contacts the side surface of the elastic seal (170) in the ready position so that a seal forlimiting fluid flow is formed between the needle guard (114, 202, 212, 242, 272) and the sidesurface (176) of the elastic seal.
    [10] 10. The catheter assembly of claim 9, Wherein the interior caVity (112) of the catheterhub (102) comprises a first inside diameter section (132) distal of a second inside diametersection (130) and Wherein the first inside diameter section (132) is larger in dimension than thesecond inside diameter section (130).
    [11] 11. The catheter assembly of claim 10, Wherein the second inside diameter section isan annular protrusion (130).
    [12] 12. The catheter assembly of claim 9, further comprising a hydrophobic filtermounted at the distal opening (150) of the distal wall (152) of the needle guard (114, 202, 212,242) to at least partially cover the distal opening (150).
    [13] 13. The catheter assembly of claim 9, Wherein the needle guard (114, 202, 212, 242)comprises a cap (134), an arm (136), a proximal Wall (138), a distal Wall (140), and a curvedelbow (142), and Wherein the curved elboW (142) contacts the catheter hub (102). 24
    [14] 14. The catheter assembly of claim 9, further comprising micro-channels formed onthe elastic seal (170).
    [15] 15. The catheter assembly of claim 9, wherein the needle further comprises a changein profile (184) located proximally of the needle tip (124).
    [16] 16. A method for manufacturing a catheter assembly comprising: forming a catheter hub (102) with a catheter tube (104) having a tube end, said catheterhub (102) comprising a body (110) defining an interior cavity (112) having an interior surfacewith an interior shoulder (172), forming a needle hub (106) with a needle (108) having a needle tip (124), a nominalneedle diameter, and a needle shaft proj ecting through the catheter hub (102) and the cathetertube (104) such that the needle tip (124) extends distally of the tube end in a ready position; placing an elastic seal (170) in the interior cavity (112) of the catheter hub and against theinterior (172) shoulder, said elastic seal (170) comprising an outside diameter (173), an insidediameter (174), and a side surface (176) located between the inside (174) and outside (173)diameters; placing a needle guard (114, 202, 212, 242, 272) for covering the needle tip (124) in aprotective position in the interior cavity (112) of the catheter hub (102) so that the needle guard(114, 202, 212, 242, 272) contacts the elastic seal (170), and forming a seal between the needle guard (114, 202, 212, 242, 272) and the elastic seal(170) for limiting fluid flow through the elastic seal (170), where the needle guard contacts theelastic seal (170), wherein said inside diameter (174) being sufficiently larger than the nominal needlediameter so that the needle shaft does not come in contact with the inside diameter (174) of theelastic seal (170) in the ready position.
    [17] 17. The method of claim 16, further comprising pushing the needle guard (114, 202,212, 242, 272) into the interior cavity (112) of the catheter hub (102) with an installation toolcomprising a lengthwise channel.
    [18] 18. The method of claim 16, further comprising a hydrophobic filter mounted at thedistal opening (150) of the needle guard (114, 202, 212, 242).
    [19] 19. The method of claim 16, further comprising pushing the guard (114, 202, 212,242) so that an outside surface of the guard is sealed against the inside diameter of the elasticsea1 (170).
    [20] 20. The method of claim 16, further comprising adding a coating (188) onto a surface(140, 144, 276) of the needle guard (114, 202, 212, 242, 272) that contacts the needle shaft.
    [21] 21. The method of claim 16, Wherein the needle guard (114, 202, 212, 242, 272)exerts a force on a distally sloping surface (130) of the interior of the catheter hub (146) to forcethe needle guard (114, 202, 212, 242, 272) against the elastic sea1 (170). 26
    类似技术:
    公开号 | 公开日 | 专利标题
    SE537810C2|2015-10-20|Iv safety catheter unit with seal
    JP2019055264A|2019-04-11|Ported iv catheter having external needle shield and internal blood control septum
    CN204233578U|2015-04-01|Conduit tube component
    US7744567B2|2010-06-29|Reducing withdrawal force in a safety IV catheter
    US20160114137A1|2016-04-28|Catheter assembly and components thereof
    US8932257B2|2015-01-13|Catheter insertion device
    US20130324930A1|2013-12-05|Iv-catheter insertion device
    SE1550211A1|2015-08-26|Catheter devices and associated methods
    EP0606695A1|1994-07-20|IV infusion or blood collection guard assembly
    SE534021C2|2011-04-05|Protective device for a catheter needle tip
    BRPI0719037B1|2018-08-21|Extravascular system to access a patient's vasculature and method for manufacturing the same
    US20060129064A1|2006-06-15|Blood collection set with an expanded internal volume
    JP2003180829A|2003-07-02|Retractable needle assembly
    US10449331B2|2019-10-22|Catheter devices with seals and related methods
    AU2014359265B2|2019-06-13|Safety needle assemblies and related methods
    US20220001145A1|2022-01-06|Catheter devices with blood control systems and related methods
    US20210138200A1|2021-05-13|Needle assemblies and related methods
    WO2020257721A1|2020-12-24|Retractable needle with damping
    同族专利:
    公开号 | 公开日
    US20140276433A1|2014-09-18|
    EP2968838B1|2017-07-19|
    ES2640382T3|2017-11-02|
    WO2014140257A1|2014-09-18|
    SE1450964A1|2014-09-16|
    HK1201217A1|2015-08-28|
    CN204723564U|2015-10-28|
    SE540188C2|2018-04-24|
    EP3248638B1|2019-05-15|
    SE1450287A1|2014-09-16|
    US8979802B2|2015-03-17|
    CN203874254U|2014-10-15|
    EP2968838A1|2016-01-20|
    EP3248638A1|2017-11-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20030097098A1|2000-03-29|2003-05-22|Gilad Lavi|Needle assembly and sheath and method of filling a drug delivery device|
    US7798994B2|2005-11-15|2010-09-21|Becton, Dickinson And Company|Needle shield to septum interconnect|
    CN101415456B|2006-03-29|2012-06-27|泰尔茂株式会社|Protector|
    US8382718B2|2006-07-31|2013-02-26|B. Braun Melsungen Ag|Needle assembly and components thereof|
    US8257313B2|2006-08-11|2012-09-04|Becton, Dickinson And Company|Integrated septum and needle tip shield for a catheter assembly|
    US8308691B2|2006-11-03|2012-11-13|B. Braun Melsungen Ag|Catheter assembly and components thereof|
    US8992483B2|2007-03-27|2015-03-31|Nipro Corporation|Indwelling needle assembly and protector|
    US7798995B2|2008-10-10|2010-09-21|Laborie Medical Technologies, Inc.|Adjustable tip needle apparatus|
    DE102009020061A1|2009-05-06|2010-11-11|B. Braun Melsungen Ag|Needle protection device for a medical hollow needle|
    US9752681B2|2010-05-07|2017-09-05|Parker-Hannifin Corporation|Precision formed article and method|
    US8932258B2|2010-05-14|2015-01-13|C. R. Bard, Inc.|Catheter placement device and method|
    CA2798020C|2010-05-19|2015-06-30|Tangent Medical Technologies, Inc.|Integrated vascular delivery system with safety needle|
    WO2011160824A1|2010-06-25|2011-12-29|B. Braun Melsungen Ag|Retention member and application thereof|WO2006090118A1|2005-02-25|2006-08-31|Salvus Technology Limited|Safety needle accessory|
    AT424879T|2005-07-06|2009-03-15|Vascular Pathways Inc|DEVICE FOR INTRAVENOUS CATHETER INTRODUCTION AND USE METHOD|
    AT548972T|2007-05-07|2012-03-15|Vascular Pathways Inc|INTRAVENOUS CATHETER INTRODUCTION AND BLOOD SPECIMENS|
    US20090093793A1|2007-10-02|2009-04-09|Yossi Gross|External drug pump|
    US10420880B2|2007-10-02|2019-09-24|West Pharma. Services IL, Ltd.|Key for securing components of a drug delivery system during assembly and/or transport and methods of using same|
    US9656019B2|2007-10-02|2017-05-23|Medimop Medical Projects Ltd.|Apparatuses for securing components of a drug delivery system during transport and methods of using same|
    USD903101S1|2011-05-13|2020-11-24|C. R. Bard, Inc.|Catheter|
    US9872971B2|2010-05-14|2018-01-23|C. R. Bard, Inc.|Guidewire extension system for a catheter placement device|
    USD903100S1|2015-05-01|2020-11-24|C. R. Bard, Inc.|Catheter placement device|
    US10384039B2|2010-05-14|2019-08-20|C. R. Bard, Inc.|Catheter insertion device including top-mounted advancement components|
    US9950139B2|2010-05-14|2018-04-24|C. R. Bard, Inc.|Catheter placement device including guidewire and catheter control elements|
    US8932258B2|2010-05-14|2015-01-13|C. R. Bard, Inc.|Catheter placement device and method|
    US8690833B2|2011-01-31|2014-04-08|Vascular Pathways, Inc.|Intravenous catheter and insertion device with reduced blood spatter|
    ES2750035T3|2011-02-25|2020-03-24|Bard Inc C R|Medical component insertion device including a retractable needle|
    CN108607150B|2013-01-30|2021-01-12|血管通路股份有限公司|Systems and methods for venipuncture and catheter placement|
    CN104043181B|2013-03-15|2017-04-12|B.布劳恩梅尔松根股份公司|Safety Iv Catheter Assembly With Seal|
    US10232088B2|2014-07-08|2019-03-19|Becton, Dickinson And Company|Antimicrobial coating forming kink resistant feature on a vascular access device|
    US10232146B2|2014-09-05|2019-03-19|C. R. Bard, Inc.|Catheter insertion device including retractable needle|
    CN113350614A|2015-05-15|2021-09-07|C·R·巴德股份有限公司|Catheter placement device including extendable needle safety feature|
    US10149943B2|2015-05-29|2018-12-11|West Pharma. Services IL, Ltd.|Linear rotation stabilizer for a telescoping syringe stopper driverdriving assembly|
    ES2805302T3|2015-08-18|2021-02-11|Braun Melsungen Ag|Catheter Devices with Valves and Related Methods|
    JP2018531663A|2015-09-18|2018-11-01|ベクトン・ディキンソン・アンド・カンパニーＢｅｃｔｏｎ， Ｄｉｃｋｉｎｓｏｎ Ａｎｄ Ｃｏｍｐａｎｙ|Safety IV catheter with molded open blood control valve|
    US10086145B2|2015-09-22|2018-10-02|West Pharma Services Il, Ltd.|Rotation resistant friction adapter for plunger driver of drug delivery device|
    US9987432B2|2015-09-22|2018-06-05|West Pharma. Services IL, Ltd.|Rotation resistant friction adapter for plunger driver of drug delivery device|
    US10493244B2|2015-10-28|2019-12-03|Becton, Dickinson And Company|Extension tubing strain relief|
    US20170119977A1|2015-10-30|2017-05-04|B. Braun Melsungen Ag|Valved catheters and related methods|
    US10376647B2|2016-03-18|2019-08-13|West Pharma. Services IL, Ltd.|Anti-rotation mechanism for telescopic screw assembly|
    SG11201900903SA|2016-08-01|2019-02-27|Poly Medicure Ltd|Intravenous catheter apparatus with safety function and pressure controlled valve element|
    US10493262B2|2016-09-12|2019-12-03|C. R. Bard, Inc.|Blood control for a catheter insertion device|
    EP3512590A1|2016-09-14|2019-07-24|Boston Scientific Scimed, Inc.|Catheter hubs|
    USD921884S1|2018-07-27|2021-06-08|Bard Access Systems, Inc.|Catheter insertion device|
    WO2020219522A1|2019-04-23|2020-10-29|Smiths Medical Asd, Inc.|Catheter insertion device with improved push tab and tip protector assembly|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US201361788766P| true| 2013-03-15|2013-03-15|
    US13/975,986|US8979802B2|2013-03-15|2013-08-26|Safety IV catheter assembly with seal|
    [返回顶部]