• 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:
    A rongeur (10) has an elongate shaft (12) with a distal end (14) and a proximal end (16). An elongate crossbar (20) moving between a retracted position and a tissue detection position has a distal end (22) and a proximal end (24) and reciprocates axially relative to the shaft (12). A first tip (34) is selectively connected to the shaft (12). The first tip (34) has a near end and a far end. The near end has a pin (78) of reduced diameter. In the selectively connected position, a bore of the shank (12) receives the reduced diameter pin (78) of the first tip (34). A second tip (36) is selectively connected to the cross bar (20). The second tip (36) has a near end and a distal end. The near end has a reduced diameter pin (80). In the selectively connected position, a bore of the crossbar (20) receives the reduced diameter pin (80) of the second tip (36).
    公开号:CH707631B1
    申请号:CH00896/14
    申请日:2012-11-14
    公开日:2016-10-14
    发明作者:B Agbodoe Victor
    申请人:Specialty Surgical Instr Inc；
    IPC主号:
    专利说明:

    Field of the invention
    The present invention relates to a rongeur, and more particularly to a rongeur with removable tips.
    background
    The Rongeur is a medical instrument used for a variety of purposes. It is particularly useful for removing small amounts of bone, cartilage or other body material from small interiors of the knee or between vertebrae. A rongeur typically includes a long solid shaft with an anvil or footplate at its distal end and a handle at its near end. A crossbar slidably engages the shaft and is reciprocated thereon by means of a pivotable second handle. Cutting edges on the distal end of the crossbar bite against the footplate to cut away a small portion of tissue with each reciprocation of the crossbar. After use, the rongeur should be subjected to a sterilization cycle before being reused. As a rule, however, only the distal end of the rongeur in the area of the footplate comes into contact with the tissue. Thus, there is a need in the art for a rongeur with removable tips that are easy to use. There is also a need for a Rongeur with removable tips that are for single use or disposable products only. There is also a need for a rongeur with a removable tip so as to reduce the possibility of fracture of the footplate, keep the cutting edges sharp and less tiring for the surgeons using the product.
    Summary of the invention
    A rongeur according to the present invention meets these requirements with an elongate shaft having a distal end and a proximal end. In the far end of the shaft a hole is arranged. An elongate crossbar has a distal end and a proximal end and is adapted to axially reciprocate with respect to the shank. The cross bar moves between a retracted position and a tissue detection position. A bore is disposed in the distal end of the cross bar. A first handle is firmly connected to the near end of the shaft. A second handle is pivotally mounted about a pivot axis at the proximal end of the shaft. A first tip is selectively connected to the shaft. The first tip has a near end and a far end. The near end has a pin of reduced diameter. In the selectively connected position, the bore of the shank receives the reduced diameter pin of the first tip. A second tip is selectively connected to the cross bar. The second tip has a near end and a far end. The near end has a pin of reduced diameter. In the selectively connected position, the bore of the cross bar receives the reduced diameter pin of the second tip.
    Brief description of the drawings
    [0004]<Tb> FIG. 1 <SEP> is an exploded perspective view of a rongeur according to the present invention;<Tb> FIG. 2A <SEP> is an elevational view of the rongeur of FIG. 1 in the forward or tissue sensing position;<Tb> FIG. FIG. 2B is an elevational view of the rongeur of FIG. 1 in the relaxed position or retracted crossbar position; FIG.<Tb> FIG. Fig. 3 <SEP> is a plan view of the rongeur of Fig. 1;<Tb> FIG. Fig. 4 <SEP> is an elevational view of the rongeur of Fig. 1 with parts omitted;<Tb> FIG. 5 <SEP> is a cross-sectional view taken along lines 5-5 of FIG. 4;<Tb> FIG. Fig. 6 <SEP> is a cross-sectional view taken along lines 6-6 of Fig. 4;<Tb> FIG. 7 <SEP> is a cross-sectional view taken along lines 7-7 of FIG. 6;<Tb> FIG. 8 <SEP> is a cross-sectional view taken along lines 8-8 of FIG. 4;<Tb> FIG. 9 <SEP> is an enlarged view of the removable tips; and<Tb> FIG. 10 <SEP> is a cross-sectional view taken along lines 10-10 of FIG. 9.
    Detailed description
    Fig. 1 shows a rongeur 10 according to the present invention. The rongeur 10 includes an elongated shaft 12 having a distal end 14 and proximate end 16. A transverse rod 20 slidably engages the shaft 12 and also includes a distal end 22 and proximal end 24. A bore 23 is formed in the distal end 14 of FIG Shaft 12 is arranged to selectively receive a removable tip 34. Similarly, a bore 25 is disposed in the distal end 22 of the cross bar 20 to selectively receive a removable tip 36. A first handle 26 extends downwardly from the proximal shaft end 16 into firm engagement with the shaft 12. A second handle 28 is pivotally attached to the proximal end 16 of the shaft 12 and pivots about an axis 30. A spring 32 is interposed between the first and second handles 26 and 28 pushes them apart into the relaxed or retracted crossbar position, as shown in FIG. 2B. A pair of removable tips 34, 36 are shown in an exploded view in FIG. The lower or first tip 34 extends from the shank 12. The upper or second tip 36 extends from the crossbar 20. The tips 34, 36 are detachably connected to the shank 12 and the crossbar 20, respectively. A foot plate 18 extends upwardly from the distal end of the tip 34. As the user moves the handles 26, 28 toward each other, overcoming the spring bias of the spring 32, the cross bar 20 and the tip 36 move toward the foot plate 18 until the distal end of the tip 36 engages the foot plate 18, so that the Rongeur in the front or tissue-detecting position is as shown in Fig. 2A, which will be described in detail below.
    As further seen in Figs. 4, 6 and 7, a T-shaped profile 38 depends from the lower surface 40 of the crossbar 20 down. A matching inverse T-shaped slot 42 is formed in the shaft 12. The slot 42 narrows from a wider portion 44 to a narrower portion 46. The ends 38a, 38b of the T-shaped profile 38 are sized large enough to permit withdrawal of the T-shaped profile 38 from the narrow portion 46 of the slot 42 but to allow removal from the wider portion 44. The cross bar 20 can thus be brought into sliding contact with the shaft 12 by inserting the T-shaped profile 38 through the wider portion of the slot 42. The crossbar 20 may then be slid towards the distal end of the shaft 12 such that the T-shaped profile 38 is below the narrow portion 46 of the slot 42, as shown in Fig. 6, thereby providing slidable axial movement between the crossbar 20 and allow the shaft 12 without the crossbar 20 can lift off the shaft 12. It is clear to one skilled in the art that the positions of the profiles and slots can be reversed and that other forms of engagement can be used therefor.
    Furthermore, in FIGS. 2A, 2B, 3, 4, 8A, 8B, 9 and 10, the tips 34, 36 and their release mechanism with the shaft 12 and the cross bar 20 are shown. A spring biased trip lever 48 is pivotally connected to the shaft 12. Similarly, a spring-biased trip lever 50 is pivotally connected to the crossbar 20. The trip levers 48 and 50 operate in the same manner, and therefore the trip lever 48 will be described in detail. For the sake of brevity, only the details of the trip lever 48 will be described in this detailed description. One skilled in the art will readily appreciate, based on the description of the trip lever 48, how to make and use the trip lever 50. Referring to FIG. 3, a recess 52 is formed in both the crossbar 20 and the shank 12 to permit movement or depression of the trigger levers 48, 50 about their respective pivot points 54. A spring 56 urges the trip levers 48, 50 into the latched or locked position shown in FIG. 8A. For releasing or unlocking the release levers 48, 50, the user can press the release levers 48, 50 into the shaft 12 or into the transverse rod 20, in the direction indicated by arrow A in FIG. 8B, at the position 58 on the release lever. If desired by the user, this operation may be performed simultaneously when the handles are in the relaxed position of Fig. 2B. As shown in Figure 2B, the release levers are aligned when the handles 26, 28 are in the relaxed or retracted crossbar position. By pressing the lever 48 in the direction indicated by arrow A, the lever 48 pivots about the pin 54. The lever 48 has a pair of projecting shoulders 60,62. The tip 34 has a mating pair of recessed slots 64, 66 thereon. When the lever 48 is pushed into the position shown in FIG. 2B, the user can grasp the tips 34, 36 and pull them away from the shaft 12 and crossbar 20 in the direction indicated by the arrow B in FIG to remove the Rongeur 10. The tips can now be discarded and a new set of tips 34, 36 can be used. Thus, the possibility of fracture of the footplate is reduced, the cutting edges always remain sharp, as they are only used during a procedure, and less tiring for the surgeons using the product. Although not currently preferred, the tips may be subjected to a sterilization process and reused. However, to readily identify whether the tips have undergone a sterilization cycle, as shown in Fig. 9, in the tips, there is a sterilization mark or indicator 100 which changes color should the tips undergo a sterilization cycle. The tips 34, 36 are selectively slidably interconnected in a similar manner as the shaft 12 and the cross bar are selectively interconnected. As further seen in FIGS. 1, 9 and 10, a T-shaped profile 68 depends from the lower surface 70 of the tip 36. A matching inverse T-shaped slot 72 is formed in the tip 34. The slot 72 narrows from a wider portion 74 to a narrower portion 76. The ends 68a, 68b of the T-shaped profile 68 are sized large enough to permit withdrawal of the T-shaped profile 68 from the narrow portion 74 of the slot 72 but to allow removal from the wider section 74. The tip 36 can thus be brought into sliding contact with the tip 34 by inserting the T-shaped profile 68 through the wider portion of the slot 72. The tip 36 may then be slid toward the distal end of the tip 34 and footplate 18 such that the T-shaped profile 68 is below the narrow portion 76 of the slot 72, as shown in FIG. 9, thereby providing a slidable axial Allow movement between the tip 36 and the tip 34 without the tip 36 can lift off the top 34. It is clear to one skilled in the art that the positions of the profiles and slots can be reversed and that other forms of engagement can be used therefor. To insert a new set of tips 34, 36 into the shaft 12 and crossbar 20, the tips 34, 36 are preferably disposed in their slidably connected position, as shown in FIG. The user can then grasp the tips 34, 36 and insert them into the shaft 12 and the cross bar 20 in the opposite direction from arrow B in FIG. 8B. Each tip 34, 36 has at its proximal end a reduced diameter pin 78, 80 in which the recesses 64, 66 are located. The proximal end of each tip has a tapered surface 82, 84 to facilitate insertion of the tips into the shank or cross bar. The distal end of each lever 48, 50 has a mating bevel 86 to facilitate insertion of the tips into the shank or cross bar. Thus, when the user first inserts the reduced diameter pegs 78, 80 into the shank or cross bar from each tip 34, 36, the levers 48, 50 are moved to the position shown in Figure 8B. The user may continue inserting the tips 34, 36 into the shank until they are fully inserted, at which time the levers 48, 50 engage the position shown in Fig. 8A and the tip 34 engages the shank 12 and the tip 36 with the crossbar 20 lock, as shown for example in Figs. 2A, 2B and 5.
    A pin 88 on the crossbar 20 runs in a slot 90 on an upper portion 92 of the second handle 28, so that when the second handle 28 is pressed by an operator in the direction of the first handle 26, the slot 90 in moves the distance and driven by the pin 88 located therein the crossbar 20 into the distance. The second handle 28 pivots about the pin 94 which is fixedly connected to the first handle 26 and the shaft 12. Turning to Fig. 9 hereafter, the footplate 18 has an anvil-shaped cutting surface 96 around a tissue-sensing recess 98 and a relaxation groove between the footplate 18 and the tip 34 as disclosed in U.S. Patent No. 4,990,148 to Worrick III et al. more fully described, which is hereby incorporated by reference in its entirety. Cutting edges at the distal end of the tip 36 engage the anvil-shaped surface 96, thereby cutting off tissue trapped therebetween, such as bone.
    Having now fully described the invention, it will be obvious to those skilled in the art that many modifications and changes can be made without departing from the scope of the invention as defined in the following claims.
    权利要求:
    Claims (13)
    [1]
    1. Rongeur (10), comprising:an elongated shaft (12) having a distal end (14) and a proximal end (16) with a bore (23) disposed in the distal end (14) of the shaft (12);an elongate crossbar (20) having a distal end (22) and a proximal end (24) and adapted to axially reciprocate with respect to the stem (12), the crossbar (20) being disposed between a retracted position and a tissue detection position is moved, wherein a bore (25) in the distal end (22) of the transverse rod (20) is arranged;a first handle (26) fixedly connected to the proximal shaft end (16) and a second handle (28) pivotally mounted about a pivot axis (30) to the proximal shaft end (16);a first tip (34) selectively connected to the stem (12) and having a proximal end and a distal end, the proximal end having a reduced diameter post (78), the well (23) being in the selectively connected position; the stem (12) receives the reduced diameter pin (78) of the first tip (34); anda second tip (36) selectively connected to the crossbar (20) and having a proximal end and a distal end, the proximal end having a reduced diameter post (80), the well (25) being selectively connected in position; the crossbar (20) receives the reduced diameter pin (80) of the second tip (36).
    [2]
    The rongeur (10) of claim 1, further comprising a first trip lever (48) pivotally connected to the shaft (12).
    [3]
    The rongeur of claim 2, further comprising a second trip lever (50) pivotally connected to the crossbar (20).
    [4]
    The rongeur of claim 3, further comprising a first spring disposed between the shank (12) and the first trigger lever (48) that urges the first trigger lever into a locked position of the first tip.
    [5]
    The rongeur (10) of claim 4, further comprising a second spring disposed between the cross bar (20) and the second trip lever (50) that urges the second trip lever (50) into a locked position of the second tip (36).
    [6]
    The rongeur (10) of claim 5, wherein a recess is disposed in the shank (12) to permit pivotal movement of the first trigger lever (48).
    [7]
    A rongeur (10) according to claim 6, wherein a recess is disposed in the crossbar (20) to permit pivotal movement of the second trigger lever (50).
    [8]
    The rongeur (10) of claim 5, wherein the first trip lever (48) has at least one protruding shoulder (60, 62).
    [9]
    The rongeur (10) of claim 8, wherein at least one recessed slot (64, 66) is disposed in the reduced diameter post (78) of the first tip (34), wherein in the locked position of the first tip (34) at least one recessed slot (64, 66) which receives at least one protruding shoulder (60, 62) fittingly.
    [10]
    The rongeur (10) of claim 9, wherein the second trip lever (50) has at least one protruding shoulder (60, 62).
    [11]
    The rongeur (10) of claim 10, wherein at least one recessed slot (64, 66) is disposed in the reduced diameter post (80) of the second tip (36), wherein in the locked position of the second tip (36) at least one recessed slot (64, 66) which receives at least one protruding shoulder (60, 62) fittingly.
    [12]
    The rongeur (10) of claim 5, wherein the second trip lever (50) has at least one protruding shoulder (60, 62).
    [13]
    The rongeur (10) of claim 12, wherein at least one recessed slot (64, 66) is disposed in the reduced diameter post (80) of the second tip (36), wherein in the locked position of the second tip (36) at least one recessed slot (64, 66) which receives at least one protruding shoulder (60, 62) fittingly.
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    同族专利:
    公开号 | 公开日
    US20130150861A1|2013-06-13|
    GB2511250B|2018-05-02|
    DE112012005187T5|2014-09-18|
    DE112012005187B4|2020-08-06|
    WO2013089959A1|2013-06-20|
    US8657823B2|2014-02-25|
    GB2511250A|2014-08-27|
    GB201410161D0|2014-07-23|
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    法律状态:
    2014-07-15| PCAR| Change of the address of the representative|Free format text: NEW ADDRESS: HOLBEINSTRASSE 36-38, 4051 BASEL (CH) |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/316,969|US8657823B2|2011-12-12|2011-12-12|Rongeur with detachable tips|
    PCT/US2012/065034|WO2013089959A1|2011-12-12|2012-11-14|Rongeur with detachable tips|
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