• 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:
    articulated optical surgical probe. a hinged optical surgical probe includes a cable sized to fit in a single hand and a single rigid cannula that extends from the cable that has a diameter of 20 ga or less. the probe further includes a slotted tip at a distal end of the cannula and at least one optical fiber that extends through the cable, the single rigid cannula and the slotted tip, and a pull wire attached to the slotted tip. tension wire exerts tension on the slotted end, the slotted end will deviate from the straight line to an inclined angle controlled by the tension in the traction wire. the slotted tip is formed of a resilient material that will restore to the straight position when the tension exerted by the tension wire is released.
    公开号:BR112014002383B1
    申请号:R112014002383-2
    申请日:2012-08-01
    公开日:2021-08-10
    发明作者:Xiaoyu Yu；Christopher McCollam；Jack Auld
    申请人:Alcon Research, Llc；
    IPC主号:
    专利说明:

    Related Orders
    [0001] This Application claims priority to US Provisional Order serial number 61/514,751, filed August 3, 2011 and the contents of which are incorporated herein by reference. Field of Invention
    [0002] This invention relates to ophthalmic surgical equipment and, more particularly, to posterior segment ophthalmic surgical probes. Fundamentals of the Invention
    [0003] Microsurgical instruments are typically used by surgeons to remove tissue from delicate and restricted spaces in the human body, in particular in eye surgery and more particularly in procedures for the removal of the vitreous body, blood, scar tissue or the crystalline lens. Such instruments include a control console and a surgical handpiece with which the surgeon dissects and removes tissue. Regarding posterior segment surgery, the handpiece can be a vitreous cutter probe, a laser probe, or an ultrasonic shredder to cut or shred tissue, and is connected to the control console by a long pressure line of air (pneumatic) and/or power cable, optical cable, or flexible tubing to supply an infusion fluid to the surgical site, and to withdraw or aspirate fluid and fragmented cut tissue from the site. The cutting, infusion and aspiration functions of the handpiece are controlled by the remote control console, which not only supplies power to the surgical handpiece, for example, an alternative or rotating cutting blade, or an ultrasonically vibrated needle, but it also controls the flow of infusion fluid and provides a source of vacuum relative to the atmosphere for the aspiration of fluid and cut/shredded tissue. Console functions are manually controlled by the surgeon, usually via a foot-operated switch or proportional control.
    [0004] During posterior segment surgery, the surgeon typically uses multiple handpieces, or instruments, during the procedure. This procedure requires these instruments to be inserted into and removed from the incision. This repeated removal and insertion can cause trauma to the eye at the incision site. To address this concern, a hub cannula was developed as early as the mid-1980s. These devices consist of a narrow tube with a hub attached. The tube is inserted through an incision in the eye up to the hub, which acts as a stopper, preventing the tube from fully penetrating the eye. Surgical instruments can be inserted into the eye through the tube, and the tube protects the side wall of the incision from repeated contact by the instruments. In addition, the surgeon can use the instrument, manipulating the instrument when the instrument is inserted into the eye through the tube, to help position the eye during surgery.
    [0005] Several surgical procedures require access to the sides or front portion of the retina. To reach these areas, surgical probes must be pre-folded or must be intraoperatively foldable. Several optical surgical probes that articulate to provide laser light and/or illuminating light are known. See for example US Patent number 5,281,214 (Wilkins et al.) and US Patent number 6,984.30 (Scheller et al.). The hinge mechanism, however, adds extra complexity and expense. A flexible laser probe that does not need a hinge mechanism is commercially available, but this device uses a relatively large diameter optical fiber sheathed in a flexible tube that comprises the distal tip, resulting in a large bend radius and large diameter distal tip. with significant bending stiffness. These features require the distal tip to contain a straight, unbent portion for ease of insertion of the bent portion, which must flexibly straighten as it passes through the hub cannula. The straight portion of the distal tip allows the bent portion to flexibly pass through the tube cannula before the distal cannula of the handpiece enters the hub cannula to allow maximum bending clearance of the flexible portion, thereby minimizing bending deformation and corresponding insertion friction forces. Such a large bend radius, large diameter flexible tubing, and straight distal tip cause the usable portion of the fibers to extend a relatively long distance from the distal tip of the probe and limit access of the probe.
    [0006] Another disadvantage in the known art is the flexibility of the distal cannula which is a function of the material properties and moment of inertia of the cross section, as determined by the size of the template of the outer diameter of the cannula to fit inside the cannula with hub and the inside diameter of the cannula to accept the flexible tube. For any given material, the outer and inner diameters of the cannula determine the flexibility of the cannula. This flexibility limits the surgeon's ability to use the instrument to manipulate the position of the eye during surgery.
    [0007] A flexible tip probe is disclosed in US Patent Application Publication 2009/0093800 (Auld et al.) that does not require a straight portion of flexible tubing, thus providing a more compact usable tip length, thereby allowing for greater access to the posterior internal structures of the eye without compromising insertion forces. The flexible tip probe provides increased rigidity of the distal cannula to facilitate manipulation of the position in the eye during surgery. Although this probe provides a relatively smaller cross section when compared to previous probes, such as those disclosed by Scheller et al., it does not provide controllable articulation over a range of angles in the way those probes do. Brief Summary of the Invention
    [0008] An Optical Hinged Surgical Probe includes a handle sized to fit in a single hand and a single rigid cannula that extends from the handle, which has a diameter of 20 Ga or less. The probe further includes a slotted tip at a distal end of the cannula, and at least one optical fiber extending through the cable, the single rigid cannula and slotted tip, and a pull wire attached to the slotted tip. When the tension wire exerts tension on the legend end, the slotted end will deviate from the straight line to a bend angle controlled by tension in the tension wire. The slotted tip is formed of a resilient material that will restore to the straight position when tension exerted by the tension wire is released.
    [0009] Other objects, aspects and advantages of the present invention will become evident with reference to the drawings and the following description of the drawings and claims. Brief Description of Drawings
    [00010] FIG. 1 is a schematic of an optical extreme surgical probe that articulates in accordance with a particular embodiment of the present invention;
    [00011] FIG. 2 illustrates an end view of an example of a slotted tip 20 in accordance with a particular embodiment of the present invention;
    [00012] FIGS. 3A - 3H illustrate various slot designs for a slotted tip in accordance with particular embodiments of the present invention; and
    [00013] FIGS. 4A-4K illustrate various mechanisms for increasing tension in the tension wire 22 in accordance with particular embodiments of the present invention. Detailed Description of the Invention
    [00014] Several embodiments of the present invention can avoid difficulties associated with optical surgical probes that articulate precedents. In particular, certain embodiments of the present invention can provide a single rigid cannula with a small diameter, not only capable of insertion into very small incisions, but also capable of articulating in a controlled manner over a range of angles. Thus, such embodiments of the present invention combine the advantages of a relatively rigid articulated optical surgical probe with the controllable articulation of dual-cannula probes that require a larger diameter.
    [00015] Particular embodiments of the present invention include a single rigid cannula with a slotted tip of resilient material secured to a traction wire. Tension in the tension wire causes the slotted end to bend in a particular direction, while releasing tension allows the resilient end to restore to its straight position. Traction wire technology was previously used to bypass a distal end of a surgical catheter, but not in a small diameter rigid cannula used in hand-held optical surgical probes, nor with the degree of angular movement used in the relatively small spaces found inside one eye. Consequently, the application of tensile wire tension in the context of hand-held surgical probes is uniquely advantageous. In particular embodiments of the present invention, one or more of the optical fibers used in end probe 10 can also be used as the traction wire.
    [00016] FIG. 1 is a schematic of an optical extreme surgical probe that articulates 10 in accordance with a particular embodiment of the present invention, with a handle 12 suitable to be held in a single hand and a cannula 14. For ease of illustration the handle 12 and cannula 14 are not shown to scale, and certain external aspects of the cable 12, such as the control mechanism for an internal pull wire, are not shown. The proximal end of the end probe 10 is connected to one or more light sources (not shown), which provide laser light and/or illumination by connecting to at least one optical fiber running through the interior of the end probe 10.
    [00017] The cannula 14 is formed of a rigid biocompatible material such as stainless steel. Extreme probes in accordance with various embodiments of the present invention utilize a single rigid cannula, referring to the fact that there is no other relatively rigid self-supporting cannula formed separately within or outside the single cannula, and/or independently movable with respect to the single cannula. However, the term "single" is not designed to exclude the use of multiple layers or coatings to form the single cannula, nor does it exclude the use of soft polymer gloves, or sheaths that conform to the shape of the cannula. Cannula 14 has a slit tip 20 at a distal end referring to the end furthest away from the surgeon during use. Slotted tip 20 can pivot in a selected direction in a controllable manner by applying tension to a tension wire trapped within slotted tip 20 (not shown in FIG. 1).
    [00018] The slotted tip 20 is formed of a resilient material, referring to a material that can restore to straight orientation after the tension from the traction wire is removed. The resilient material for the cracked material can be, for example, Nitinol, which can be both rigid enough and inserted through an incision hub, and resilient enough to restore after pivoting. Other metals such as spring steel, or other materials with similar properties known in the art, could be used. Depending on the particular slot configuration of the slotted tip it may be possible to use relatively rigid materials that are not exceptionally elastic, such as stainless steel, nickel-based super alloys or cobalt-chromium alloys or the like, without applying too much force, so as to exceed the pour point and deform the material permanently. Resilient materials can themselves be biocompatible or could be wrapped in another material such as a polymer sheath to prevent contact with tissue. Cannula 14 and slit tip 20 can be, but need not be, formed of the same material. Cannula 14 and/or slit tip 20 may also be coated with a hardened material such as synthetic diamond or metal deposition, for example, to provide improved rigidity for insertion into an incision cube to reduce the likelihood of breakage.
    [00019] FIG. 2 illustrates an end view of an example of a slotted tip 20 in accordance with a particular embodiment of the present invention. In the embodiment outlined in FIG. 2, a pull wire 22 is attached to what is shown as the top side of the slit tip 20. The slit tip 20 encloses two optical fibers 24 and 26, an illuminating fiber 24 having a diameter of 183 microns, and a laser fiber 26 having a diameter of 108 microns. Allowing for the width of the tent tip 20 this allows the diameter of the cannula 14 to be made smaller compared to dual cannula systems.
    [00020] FIGS. 3A - 3H illustrate various slot designs for slotted tip 20 in accordance with particular embodiments of the present invention, respectively labeled 20A, 20B, etc., and collectively referred to as slotted tip 20. In FIG. 3A slits deeper than the radius of the slotted tip 20A are cut into the side of the slotted tip 20A in the direction that the slotted tip 20A is to bend. Shallow slits are cut on the opposite side allowing sides to bend as well. FIGS. 3B and 3C illustrate straight and curved keyhole slots that have a wider base as the slot extends deeper into the respective slotted ends 20B and 20C. The wider base reduces the amount of force required to deflect the 20B or 20C slotted tip into its curved position, potentially making the end probe 10 more comfortable to use.
    [00021] FIGS. 3D - 3G illustrate slit designs that can be used for stiffer edge materials to allow the slit 20 to resiliently restore to the straight position after being deflected to the bent position. In FIG. 3D slits which are generally oblong along the length of the cannula 14 are fitted opposite shallow rear slits which tend to reduce the force required to bias the slit tip 20D into the curved position. In FIG. 3E a continuous spiral cut, which allows the slotted tip 20E to bend, is interspersed with rear slots, in this case keyhole slots, which cause the slotted tip 20E to bend towards the rear slots. FIG. 3F shows a spiral cutting design in which the spiral design is perpendicular to the longitudinal centerline of the slotted tip 20F on one side, causing the slotted tip 20F to preferentially deviate towards the side where the spiral path is perpendicular. FIG. 3G shows a spiral cut design with the selective flared cut on one side, causing the 20G slotted tip to selectively deviate towards the side where the spiral cut is widest.
    [00022] FIG. 3H shows a 20H slotted tip formed from a wire wound material such as by winding drawn material into wires around a mandrel. At a proximal and distal end of the 20FL slotted tip the turns of the wound wire are welded together. In the intermediate region between the proximal and distal ends, one side of the tube has widened interstitial slits formed between the coils of the wound wire, causing the 20H slit tip to selectively deflect towards the widened slits when tension is applied across the wire. of traction. Forming the slotted end 20 of a wire from coiled material can have advantages allowing the use of materials that can more easily be formed into wires than tubes. Although a single wound wire is shown in FIG. 3H. various wire filaments could also be used.
    [00023] FIGS. 4A - 4K illustrate various mechanisms for increasing tension in the traction wire 22 in accordance with particular embodiments of the present invention. In FIGS. 4A and 4B the pull wire 22 is wound onto a pinion 40 secured between a control knob 42 and a base 44. The pinion 40 comprises two surfaces, a surface of smaller diameter r that rolls between the control knob 42 and a base 44, and a surface of larger diameter R around which the traction wire 22 is wound. The radial difference between the smaller and larger diameter surfaces r and R results in a differential displacement Δ1 in the traction wire when pinion 40 rotates and translates. By selecting appropriate diameters for the smaller and larger diameter surfaces re R, a relatively small amount of ΔI traction wire displacement can be achieved during a relatively large amount of control knob translation, providing the user with precise control over the deflection in the slotted tip 20. In one embodiment the smaller diameter surface r comprises gear teeth, with corresponding gear teeth on control knob 42 and base 44. This can reduce the probability of slippage.
    [00024J FIGS. 4C - 4D illustrate a lever arm 50 with a sliding actuation pin 52 held in place by a fixed pin 54 on a pivot of the arm. A control knob, not shown, can be used to advance the slide pin 52, allowing the proximal portion of the lever arm 50 to lift, thereby rotating a lanyard 56 on a distal end of the lever arm 50 to apply tension to the lever wire. traction 22. FIGS. 4E and 4F show pull wire 22 threaded onto a slide pin 60 and a first fixed pin 62 and anchored to a second fixed pin 64. Advancing a control knob 66 attached to the slide pin 60 increases tension in the pull wire 22.
    [00025] FIGS. 4G and 4H illustrate a pull wire 22 threaded onto a slide pin 70 that is directed in a generally upward direction by a guide track 72 when a control knob 74 is advanced. The path of the guide track 72 determines how the tension in the drawwire 22 varies as the control knob is advanced, thus providing a smooth and controlled increase in tension. In the case of a linear guide like that illustrated in FIG. 4G and 4H, the pull wire and nation wire take will occur in the last advance portion of control knob 74. In the alternate configuration shown in FIG. 41 the guide track 72 is reshaped to provide greater take-up of the pull wire at the beginning of the advance by the control knob 74 to produce a more balanced increase in tension across the entire stroke of the control knob 74. In FIG. 4J guide track 72 slopes even more sharply so that most of the voltage increase takes place earlier in the course of control knob 74. FIG. 4K. illustrates an alternative embodiment of guide track 72 with detents 80 that allow distinct stops along the path corresponding to different angles of slotted tip 20. A shelf or surface with detents can also be used with any of the various embodiments of the end probe 10 using a slide pin or similar actuation mechanism that includes any of the embodiments shown in FIGS. 4A - 4K.
    [00026] Although certain embodiments of the present invention have been described above, these descriptions are provided for purposes of illustration and explanation. Various changes and modifications, and departures from the systems and methods disclosed above that might be apparent to one skilled in the art, may be adopted without departing from the scope of the present invention as described in the claims that follow.
    权利要求:
    Claims (12)
    [0001]
    1. Articulated optical surgical probe (10), characterized in that it comprises: a cable (12) sized to fit in a single hand; a single rigid cannula (14) extending from the cable, which has a diameter of 0, 9 mm (20 Ga) or less; a slotted tip (20) at a distal end of the cannula, extending from the most distal end of the single rigid cannula (14) to the most distal end of the hinged optical surgical probe; an optical fiber (24, 26) extending through the cable, the single rigid cannula (14) and the slit tip (20); and a pull wire (22) secured to the slotted end, and wherein: the pull wire is threaded onto a first fixed pin (62) in the cable and anchored to a second fixed pin (64) in the cable; and the pull wire is threaded onto a slide pin (60, 70) located between the first and second pin fixed to the cable such that the distal movement of the slide pin causes an increase in tension in the pull wire, the increased tension causes the slotted tip to controllably deviate from the straight position to a bent position in a selected direction by applying tension to the tension wire; the slotted tip is formed of a resilient material that recovers the straight position when tension exerted by the traction wire is released.
    [0002]
    2. Probe according to claim 1, characterized in that it further comprises a control button (42, 74) on the cable (12), in which the distal movement of the sliding pin (60, 70) is controlled by sliding the button control button, and where the control knob is connected to the slide pin.
    [0003]
    3. Probe according to claim 1, characterized in that it further comprises a plurality of detents (80) in contact with the sliding pin (70), the detents providing a plurality of stops for advancing the sliding pin.
    [0004]
    4. Probe according to claim 1, characterized in that it further comprises a guide track (72) for the sliding pin (70) inside the cable (12), the guide track directing the advance of the sliding pin.
    [0005]
    5. Probe according to claim 4 characterized in that the guide track (72) comprises any of the following additional features: wherein the guide is linear; wherein the guide track (72) is curved to control the rate of take-up rate for the pull wire (22) via the slide pin (70), so that the tension on the pull wire increases evenly as the slide pin is advanced along the guide track; or wherein the guide track (72) is curved with an initial ramp at a proximal end such that a rate of increase in tension in the tension wire is higher when the slide pin is advanced through the start ramp of the guide track and the rate of increase in tension declines after the slide pin passes the guide track's initial ramp.
    [0006]
    6. Probe according to claim 1, characterized in that the traction wire (22) is an optical fiber.
    [0007]
    7. Probe according to claim 1, characterized in that the slotted tip (20) comprises deep slits extending after a radius of the curled slotted tip in the direction in which the slotted tip deflects, and slots lines that extend short of the radius of the slotted tip over an opposite side from which the slotted tip deflects.
    [0008]
    8. Probe according to claim 7, characterized in that the deep cracks comprise any of the following characteristics: they are wider as a depth of the deep cracks increases; they comprise an oblong section that extends longitudinally along the slotted tip (20); or are curved.
    [0009]
    9. Probe according to claim 1, characterized in that the slotted tip (20) comprises any of the following characteristics: comprises spiral slots; comprises rear slots interspersed between spiral slots on a side to which the slit tip deflects; is formed as a coiled wire coil; is formed from Nitinol; or is coated with a soft polymer sheath.
    [0010]
    10. Probe according to claim 9, characterized in that the slotted tip (20) comprises spiral slots, the spiral slots have a spiral path perpendicular to a longitudinal axis of the slotted tip on one side to the which the slotted end deflects or where the spiral slits are wider on one side to which the slotted end deflects.
    [0011]
    11. Probe according to claim 1, characterized in that the single rigid cannula (14) is formed of stainless steel or in that the single rigid cannula is coated with stiffening material.
    [0012]
    12. Probe according to claim 1, characterized in that the at least one optical fiber includes two optical fibers (24, 26).
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    法律状态:
    2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-12-10| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-03-17| B25A| Requested transfer of rights approved|Owner name: ALCON RESEARCH, LLC (US) |
    2021-06-15| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-08-10| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 01/08/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201161514751P| true| 2011-08-03|2011-08-03|
    US61/514,751|2011-08-03|
    PCT/US2012/049160|WO2013019859A1|2011-08-03|2012-08-01|Articulating ophthalmic surgical probe|
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