• 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:
    blood collection device the order relates to a blood collection device comprising: a cannula cube (10) defining a chamber (28); an inlet cannula (12) that defines a geometric axis and has a distal end and a lumen that extends through it, the inlet cannula being mounted on the cannula hub so that the distal end of the inlet cannula is external to the cannula cube and so that the lumen through the entry cannula communicates with the chamber; an outlet cannula (14) which has a proximal end and a lumen extending through it, the outlet cannula being mounted on the cannula hub so that the proximal end of the cannula is external to the cannula hub and so that the lumen of the exit cannula communicates with the chamber; a closed sleeve (34) mounted on a part of the outlet cannula disposed externally to the cannula hub; and a ventilation mechanism (38) that provides communication between the camera and the surrounding environment.
    公开号:BR112012005394B1
    申请号:R112012005394-9
    申请日:2010-09-07
    公开日:2020-09-15
    发明作者:Rishi Baid
    申请人:Poly Medicure Limited；
    IPC主号:
    专利说明:

    CORRELATE ORDER INFORMATION
    This application claims the priority of the Indian provisional patent application No. 1861 / DEL / 2009, filed on September 9, 2009, the entire content of which is incorporated here for reference. The claimants claim the benefit of this provisional application.
    The invention relates to a blood collection device comprising a cannula cube that defines a chamber, an inlet cannula and an outlet cannula, both being mounted on the cannula cube and communicating with the chamber, a glove closed mounted on a part of the exit cannula disposed externally to the cannula hub and a ventilation mechanism that provides communication between the chamber and the surrounding environment.
    Blood collection devices of the above species have long been used to collect blood from patients, in which the patient vessels from which the blood will be drawn are often somewhat small and / or not visible. If the tip of the entry cannula is not communicating with the inside of the blood vessel, it is likely that the blood collection procedure will not be successful and the patient may, in addition, be injured by the penetration of delicate underlying structures. Therefore, confirmation of accurate placement of the cannula tip into a blood vessel is desirable for blood withdrawal procedures.
    Known intravenous blood collection devices therefore include mechanisms to indicate when the tip of the entry cannula is in communication with the inside of a blood vessel, such as, for example, a transparent part of the cannula cube from which the presence of blood can be observed. Observation of blood in the cannula cube is known as a “flashback”. However, flashback detection has been less than satisfactory for many blood collection devices such as the flow of blood into the transparent part of the cube. cannula is prevented by air pressure in the cannula cube and thus flashback confirmation is not visible or delayed. This delay can prevent the determination of the precise moment when the tip of the cannula enters the blood vessel, which can cause the healthcare worker who inserts the needle to lose or pierce the vessel and penetrate delicate surrounding structures. Therefore, intravenous blood collection devices have been provided with a ventilation mechanism that provides communication between the flashback chamber of the cannula cube and the surrounding environment.
    It is an object of the invention to present a blood collection device that provides a more effective use and a smoother treatment of the patient and that is easy and cheap to manufacture.
    This object is satisfied by a blood collection device according to claim 1.
    The blood collection device of the invention comprises a cannula cube that defines a chamber; an entry cannula which defines a geometrical axis and which has a distal end and a lumen extending through it, the entry cannula being mounted on the cannula cube so that the distal end of the entry cannula is external to the cannula cube and so that the lumen through the entry cannula communicates with the chamber; an outlet cannula that has a proximal end and a lumen that extends through it, the outlet cannula being mounted on the cannula hub so that the proximal end of the outlet cannula is external to the cannula cube and so that the lumen the exit cannula communicates with the chamber; a closed glove mounted on a part of the outlet cannula disposed externally to the cannula hub; and a ventilation mechanism that provides communication between the chamber and the surrounding environment, wherein the ventilation mechanism comprises a tubular insert that defines a fluid passage through it and a membrane that extends through the fluid passage, in which the membrane it is made of a material permeable to air and substantially impermeable to blood.
    The blood collection device of the invention and, in particular, the specific design of its ventilation mechanism allows the flashback of blood to occur particularly quickly when the cannula enters the blood vessel. This makes detection of vein perforation particularly quick and safe, and thus helps to ensure that the inlet cannula is correctly placed on the patient at the first attempt. In the end, blood can be collected with the device of the invention in a way that is particularly smooth for the patient.
    According to the invention, the entry cannula and the exit cannula can either be two separate pieces or they can be formed integrally from a single cannula that is provided with an opening in the region of the flashback camera that provides communication between both the lumen of the entry cannula and the lumen of the exit cannula and the flashback chamber.
    In addition, the membrane can be configured so that, when in contact with blood, the membrane either remains permeable to air or becomes impermeable not only to blood, but also to air. In the latter case, the membrane can be referred to as self-sealing.
    According to an embodiment of the invention, the tubular insert of the ventilation mechanism is housed in a tubular projection extending from the cannula cube. Preferably, the tubular projection extends in a transverse direction, in particular perpendicular to the geometric axis of the entry cannula.
    The manufacture of the device is particularly simple and inexpensive, if the tubular projection is integral with the cannula cube, in particular with a first part of the cannula cube carrying the entry cannula.
    According to another embodiment, the tubular insert of the ventilation mechanism is fixed to the tubular projection by means of a pressure fitting. This makes the assembly of the device particularly simple and inexpensive, since the ventilation mechanism can be prepared separately from the cannula hub, after which the tubular insert has to be simply pushed into the tubular projection.
    In order to prevent the tubular insert from being pushed too far into the tubular projection, the tubular insert of the ventilation mechanism may have a collar formed on its outer surface adjacent to the end facing away from the cannula hub. In addition, the collar performs a sealing function as it helps to prevent blood from leaving the flashback chamber.
    Preferably, the outside diameter of the collar is substantially equal to the outside diameter of the tubular projection, as this leads to a smooth transition from the collar to the tubular projection in the assembled state.
    According to another embodiment, the fluid flow is reduced by an internal collar in the region of the tubular projection adjacent to the cannula cube chamber. This internal collar reinforces the sealing function in the sense that it also helps to prevent blood from leaving the flashback chamber.
    According to another embodiment, the cannula cube is formed from a first and a second piece, the first piece bearing the inlet cannula and the second piece carrying the outgoing cannula.
    Preferably, the first part comprises a clamping part and a tubular part which extends proximally therefrom towards the geometric axis of the cannula. The clamping part makes handling the device easier, while the tubular part extending from it can be designed so that a clear view of the entry of blood into the flashback chamber is obtained.
    According to another embodiment, the second part is generally tubular in shape and partially housed in the tubular part of the first part by means of a pressure fitting. Thus, the second part only needs to be pushed into the first part to assemble the device, which makes the device even simpler and less expensive to manufacture.
    Preferably, the second piece and at least the tubular part of the first piece are made from a transparent plastic material. This simplifies flashback detection and makes manufacturing the device even less expensive, since the first and second parts can be manufactured by injection molding and no additional flashback detection window has to be implemented.
    A preferred embodiment of the invention is described in the following description and in the accompanying drawings, in which:
    Figure 1 is a perspective view of the blood collection device according to the invention;
    Figure 2 is a cross-sectional view of the blood collection device of Figure 1; and
    Figure 3 is a cross-sectional view of a blood collection device according to another embodiment of the invention.
    The blood collection device shown in Figures 1 and 2 comprises a cannula cube 10, which carries an inlet cannula 12 and an outlet cannula 14. Inlet and outlet cannulas 12, 14 are aligned and define a geometric axis of needle. According to this embodiment, the cannula 12 and the cannula 14 form separate parts.
    The cannula cube 10 is formed from a first piece 16 and a second piece 18. Both the first and second pieces 16, 18 are made of a transparent plastic material, such as, for example, by injection molding.
    The first part 16 includes a distal clamping part 20 for easy handling of the blood collection device and a tubular part 22 which extends proximally therefrom.
    The second part 18 includes a tubular part 24 and a threaded part 26 which extends proximally thereto. The tubular part 24 of the second part 18 has a slightly tapered outer surface and is housed in the tubular part 22 of the first part 16 by means of a pressure fitting. The threaded part 26 makes it possible to attach a blood collection tube, bag or container or the like (not shown) to the device.
    The tubular parts 22, 24 of the first and second parts 16, 18 together define the flashback chamber28 of the cannula cube 10.
    The entry cannula 12 has a tip 30 at its distal end which is adapted to be inserted into a patient's blood vessel for drawing blood. The inlet cannula 12 is mounted on the first part 16 of the cannula hub 10 so that its lumen communicates with the flashback camera28.
    The exit cannula 14 is mounted on the second part 18 of the cannula hub so that the lumen of the exit cannula 14 communicates with the flashback chamber28. The outlet cannula 14 has a proximal part 32 that extends from the second piece 18 of the cannula cube 10 which is adapted to be inserted into a tube, bag, blood collection container or the like (not shown) for collecting blood from the flashback chamber. The proximal part 32 of the outlet cannula 14 is covered by a rubber glove 34. The outlet cannula 14 has a tip 36 at its proximal end to pierce the rubber glove 34 when the tube, bag, blood collection container or the like will be connected to the device.
    The blood collection device also comprises a ventilation mechanism 38 that provides communication between the flashback chamber28 and the surrounding environment.
    The ventilation mechanism 38 comprises a tubular insert 40 that defines a fluid passage 42 through it and a membrane 44 that extends through the fluid passage 42. The membrane 44 rests on a backrest 46 that extends along the inner surface 48 of the tubular insert 40 and can be attached to the tubular insert 40, for example, by gluing, welding, etc.
    The membrane 44 is made from a material which is permeable to air and substantially impermeable to blood. Membrane 44 can be configured so that, when in contact with blood, membrane 44 either remains permeable to air or becomes impermeable not only to blood, but also to air. Examples of suitable materials include, but are not limited to, plastic, thermoplastic and polyethylene.
    The tubular insert 40 of the ventilation mechanism 38 is housed in a tubular projection 50, which is formed integrally with the first part 16 of the cannula hub 10. The tubular projection 50 extends perpendicular to the geometric axis of the needle a from the first part 16 of the cannula hub 10, more specifically in the proximal region of the clamping part 20 thereof.
    The tubular insert 40 of the ventilation mechanism 38 is fixed to the tubular projection 50 by means of a pressure fitting. An outer collar 52 is formed on the outer surface of the tubular insert 40 adjacent to the end of the tubular insert 40 facing away from the cannula hub 10. The outer diameter of the collar 52 is substantially the same as the outer diameter of the tubular projection 50.
    In the transition region from the tubular projection 50 to the flashback chamber28, an inner collar 54 is shown. The length of the tubular insert 40 is selected so that the outer collar 52 abuts the end of the tubular projection 50 facing away from the chamber. flashback28, while the end of the tubular insert 40 towards the flashback chamber28 touches the inner collar 54, when the tubular insert 40 is completely inserted in the tubular projection 50.
    In use, when the entry cannula 12 is inserted into the patient's blood vessel, blood enters the entry cannula 12 due to blood pressure, thus displacing the air from the lumen of the entry cannula 12 into the flashback chamber28 . Instead of being compressed in the flashback chamber28 thus accumulating a back pressure, the displaced air can escape from the flashback chamber28 through the membrane 44 of the ventilation mechanism 38, so that the blood in the inlet cannula 12 is free to flow in. flashback chamber, thus indicating successful vein perforation. At the same time, the membrane 44 as well as the pressure fitting of the tubular insert 40 in the tubular projection 50 together with the external and internal collars 52, 54 prevent blood from escaping from the flashback chamber28 through the ventilation mechanism 38.
    Figure 3 shows another modality of a blood collection device according to the invention, which is essentially identical to the blood collection device shown in Figures 1 and 2, except that the inlet cannula 12 and the outlet cannula 14 do not form separate parts. Instead, in the blood collection device of Figure 3, the inlet cannula 12 and the outflow cannula 14 are integrally formed from a single cannula 56 provided with an opening 58 that not only distinguishes the inlet cannula. 12 of the exit cannula 14, but it also provides communication between both the lumen of the entry cannula 12 and the lumen of the exit cannula 14 and the flashback chamber28. Aperture 58, such as a slot or perforation, can be positioned anywhere in the region of the flashback chamber28.
    List of Reference Numbers 10 cannula cube 12 inlet cannula 14 outlet cannula 16 first piece 18 second piece 20 clamping part 22 tubular part 24 tubular part 26 threaded part 28 flashback chamber 30 tip 32 proximal part 34 rubber glove 36 tip 38 ventilation mechanism 40 tubular insert 42 fluid passage 44 membrane 46 backrest 48 inner surface 50 tubular projection 52 outer collar 54 inner collar 56 single cannula 58 opening
    权利要求:
    Claims (9)
    [0001]
    1. Blood collection device comprising: a cannula cube (10) that defines a chamber (28); an inlet cannula (12) defining a geometric axis and having a distal end and a lumen extending through it, the inlet cannula (12) being mounted on the cannula hub (10) so that the distal end of the inlet cannula (12) is external to the cannula cube (10) and so that the lumen through the inlet cannula (12) communicates with the chamber (28); an outlet cannula (14) having a proximal end and a lumen extending through it, the outlet cannula (14) being mounted on the cannula hub (10) so that the proximal end of the outlet cannula (14) it is external to the cannula cube (10) and so that the lumen of the exit cannula (14) communicates with the chamber (28); a closed sleeve (34) mounted on a part (32) of the outlet cannula (14) disposed externally to the cannula hub (10); and a ventilation mechanism (38) that provides communication between the chamber (28) and the surrounding environment, the ventilation mechanism (38) comprising a tubular insert (40) that defines a fluid passage (42) through it and a membrane (44) extending through the fluid passage (42), in which the membrane (44) is made from a material permeable to air and substantially impermeable to blood, the tubular insert (40) of the ventilation mechanism (38 ) having an external collar (52) formed on its external surface, CHARACTERIZED by the fact that the tubular insert (40) of the ventilation mechanism (38) is received in a tubular projection (50) extending from the cannula cube (10) ; and the outer collar (52) is formed adjacent an outwardly facing end of the cannula hub (10), wherein an outer diameter of the outer collar (52) is substantially equal to an outer diameter of the tubular projection (50).
    [0002]
    2. Blood collection device according to claim 1, CHARACTERIZED by the fact that the tubular projection (50) extends in a transverse direction, particularly perpendicular to the axis of the entry cannula (12).
    [0003]
    3. Blood collection device according to claim 1 or 2, CHARACTERIZED by the fact that the tubular projection (50) is integrated with the cannula cube (10), in particular with a first part (16) of the cube cannula (10) supporting the inlet cannula (10).
    [0004]
    Blood collection device according to any one of claims 1 to 3, CHARACTERIZED by the fact that the tubular insert (40) of the ventilation mechanism (38) is fixed to the tubular projection (50) by means of a socket pressure.
    [0005]
    5. Blood collection device, according to any one of claims 1 to 4, CHARACTERIZED by the fact that in the region of the tubular projection (50) adjacent to the chamber (28) of the cannula cube (10), the passage of fluid is reduced by an internal collar (54).
    [0006]
    6. Blood collection device, according to any of the preceding claims 1 to 5, CHARACTERIZED by the fact that the cannula cube (10) is formed by a first and second parts (16, 18), the first part (16) supporting the entry cannula (12) and the second part (18) supporting the exit cannula (14).
    [0007]
    7. Blood collection device according to claim 6, CHARACTERIZED by the fact that the first part (16) comprises a clamping part (20) and a tubular part (22) extending towards the axis of the cannula.
    [0008]
    8. Blood collection device according to claim 7, CHARACTERIZED by the fact that the second part (18) is generally tubular in shape and partially received in the tubular part (24) of the first part by means of a pressure fitting
    [0009]
    9. Blood collection device according to any one of claims 6 to 8, CHARACTERIZED by the fact that the second part (18) and at least the tubular part (22) of the first part (16) are made of a transparent plastic material.
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    法律状态:
    2019-01-08| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-07-23| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-07-21| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-09-15| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 15/09/2020, OBSERVADAS AS CONDICOES LEGAIS. |
    2021-06-22| B16C| Correction of notification of the grant|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 07/09/2010, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF, QUE DETERMINA A ALTERACAO DO PRAZO DE CONCESSAO |
    优先权:
    申请号 | 申请日 | 专利标题
    IN1861DE2009|2009-09-09|
    IN1861/DEL/2009|2009-09-09|
    PCT/IB2010/054013|WO2011030282A1|2009-09-09|2010-09-07|Blood collection device|
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