• 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:
    TIP FOR FIXING BONE FRACTURES. The present invention relates to a fixation forceps for bones comprising a first arcuate forceps element adapted to the shape of a bone and extending between a first connecting end and a first free end, a second adapted arcuate forceps element to the shape of the bone, a second connecting end of the second clamp element being hingedly secured to the first clamp element, the second clamp element extending between the second connecting end and a second free end, and a drive received in the first gripper element which passes out of the first gripper element to be in a boundary position with a portion of the contact point of the second element, so that when the drive element is further extended away from the first element, the drive element rotates the second gripper element with respect to the first gripper element to move the first and second ends. free ages toward each other to apply a radial compressive force to the bone.
    公开号:BR112013028856B1
    申请号:R112013028856-6
    申请日:2012-05-10
    公开日:2021-05-18
    发明作者:Sean Powell；Robert Limouze；Natasha Weeks；Rene Haag；George J. Haidukewych
    申请人:Synthes Gmbh；
    IPC主号:
    专利说明:

    PRIORITY CLAIM
    [0001] The present application claims priority and is a continuation in part of US Patent Application Serial No. 13/068,397 entitled "Bone Fracture Fixation Clamp", filed May 10, 2011 to George J. Haidukewych, the description the entirety of which is incorporated herein by reference. FIELD OF THE INVENTION
    [0002] The present invention relates to the fixation of fractured bones and, in particular, is related to a system and method for securing a fixation forceps for bones on an outer periphery of a fractured bone. BACKGROUND
    [0003] Long bone fractures are sometimes treated by fixation devices for bones that are positioned on an outer periphery of the bone. For example, fixation of long, oblique fractures in bones previously fitted with metal prostheses (eg, intramedullary pins) precludes the use of fixation devices for bones that extend into the bone. Therefore, such bone fixation procedures use a combination of metallic handles, clamps and compression plates that are employed with or without fixation threads that extend into the bone. Numerous examples of the prior art are discussed below. SUMMARY OF THE INVENTION
    [0004] The present invention relates to a fixation forceps for bones comprising a first arcuate forceps element that adapts to the shape of a target portion of a bone and which extends between a first connecting end and a first free end, and a second arcuate clamp element which conforms to a shape of a target portion of the bone, a second connecting end of the second clamp element being hingedly attached to the first connecting end of the first clamp element, the second gripper element extending between the second connecting end and a second free end. The bone clamp further comprises a drive element received in the first gripper element which passes out of the first gripper element to be in a boundary position with an adjoining portion of the second element, so that when the drive element is extended further away from the first element, the actuating element rotates the second pinch element relative to the first pinch element to attract the first and second free ends towards each other to apply a radial compressive force to the bone . BRIEF DESCRIPTION OF THE DRAWINGS
    [0005] Figure 1 is a side view of the fixation forceps according to a first embodiment of the present invention, secured in operative position to a fractured bone; Figure 2 is an exploded top view of the clamp of the present invention; Figure 3 is a partial side view of the clamp of the present invention; Figure 4 is a side view of a fractured bone with a plurality of clamps of the present invention in combination with an elongated plate secured in operative position to the fractured bone; Figure 5 is a side view of a fractured bone with a plurality of clamps embodying the present invention in combination with an elongated plate secured in operative position to a fractured bone; Figure 6 is a top view of a clamping clip in accordance with a first alternative embodiment of the invention; Figure 7 is a top view of the clamping clip shown in Figure 6 operatively affixed to a patient's bone; Figure 8 is an isometric cut-away view of a bone clamp in accordance with a second alternative embodiment of the invention; Figure 9 is an isometric cut-away view of a bone clamp in accordance with a third alternative embodiment of the invention; Figure 10 is an isometric cut-away view of a bone clamp in accordance with a fourth alternative embodiment of the invention; Figure 11 is an isometric cut-away view of a bone clamp in accordance with a fifth alternative embodiment of the invention; and Figure 12 is an isometric cut-away view of a bone clamp in accordance with a sixth alternative embodiment of the invention. DETAILED DESCRIPTION
    [0006] The present invention can be further understood with reference to the following description and the accompanying drawings, in which like elements are referred to with like reference numerals. The present invention relates to the treatment of fractured bones and, in particular, is concerned with a system and method for stabilizing a fractured or otherwise damaged bone by attaching a bone fixation device to an external surface thereof. The exemplary system and method according to the invention can be used for fixing fractures in a long bone (eg oblique fractures, transverse fractures, etc.) or for adding strength and stability to a weakened bone (eg due to to osteoporosis). An exemplary bone stabilization device in accordance with the invention includes first and second forceps elements that have an arcuate shape that conforms to an outer surface of a bone to which the first and second forceps elements will be attached. In one embodiment of the invention, the first and second forceps elements can be removably affixed to each other so that the first and second forceps elements can be inserted individually into the body and onto the bone in a target orientation. In another embodiment, the first and second gripper elements are permanently attached to one another and allowed to move relative to one another within a predetermined range of motion. The first and second gripper elements include respective clamping portions configured to interlock with one another. The first and second clamping portions include a provisional clamping mechanism configured to provisionally secure the first and second clamp elements together and allow limited movement of the first and second clamp elements relative to each other so that little or no no compression is applied to the bone. As will be described in more detail below, the provisional clamping mechanism can be one with a pivot joint, a sliding joint, a meshed joint or a threaded joint. The first and second clamping portions further comprise a locking mechanism configured to move the first and second clamp elements radially inwardly to apply a compressive force to the bone. The locking mechanism may be a screw configured for threaded insertion through respective holes in the first and second gripper elements. In an operational configuration, since the first and second clamp elements have been provisionally secured to the bone, the screw can be inserted through respective holes to move the first and second clamp elements in a contracted configuration over the bone, radially compressing the bone. In another embodiment of the invention, a bone plate may be inserted over the bone before or after the insertion of the first and second clamp elements so that the first and second clamp elements also secure the bone plate to the bone, as will be described in more detail later. It will be understood by one of skill in the art that while the exemplary embodiments specifically describe a device for stabilizing a long fractured bone, the device of the present invention can be used for any bone through which it is desirable to secure the exemplary stabilization device.
    [0007] As shown in Figures 1 and 2, the present invention relates to a clamping clamp generally indicated as 10 for stabilizing a spiral bone fracture 12 in an elongated tubular bone 14. The clamping clamp 10 comprises a first arcuate gripper element 16 and a second arcuate gripper element 18 (a pair of gripper elements) pivotally coupled or hinged to one another by a pivot or pivot pin 20 operatively disposed in channels or holes 21 formed in each of the collet elements 16 and 18. A bias or spring 22 is disposed adjacent the pivot or pivot pin 20 to normally bias the first arcuate collet element 16 and the second collet element 18 in an open position relative to each other. .
    [0008] Each arcuate clamp element 16 and 18 includes a concave inner surface 24 that has at least one spike-like element or protrusion 26 extending outwardly from each concave inner surface 24 to engage the bone surface 14 to hold the clamp 10 in place. In addition, a plurality of pressure-relieving recesses or indentations, each denoted 28, is formed on the concave inner surface 24 of each clip element 16 and 18 to preserve blood flow in the patient's limb when the clamping clip 10 is locked in place.
    [0009] As shown in Figures 2 and 3, the clamping clamp 10 additionally includes an adjustment device generally indicated as 30 to tighten the arcuate clamp elements 16 and 18 around the bone 14, forcing the spike-like elements or protrusions 26 against the surface of bone 14. The adjustment device 30 comprises an externally threaded element 32 configured to be threaded through a groove or internally threaded portion 34 formed in the first arcuate clamp element 16 adjacent to the pivot pin or hinge 20, and into an internally threaded portion or recess 36 formed in the second arcuate clamp element 18 adjacent the pivot pin or hinge 20 to tighten and secure the locking clamp 10 in place around the bone 14.
    [0010] The second arcuate gripper element 18 includes an upper plate or flange 37 and a lower plate or flange 39 disposed in spaced relationship with respect to each other to cooperatively form a slot or opening 41 therebetween to receive an extension or tongue 43 including the internally threaded channel or portion 34 formed in the first arcuate collet member 16. The clamping collet 10 may also include at least one internally threaded opening or channel 38 formed through one or both of the arcuate collet elements 16 and 18 to receive an externally threaded anchor bolt or fastener 40 threaded into the bone 14 to anchor the clamping clip 10 in place.
    [0011] Figures 4 and 5 show the clamping collet 10 in use as part of a clamping assembly. Specifically, in addition to the clamping clip 10, the clamping assembly includes a bone plate generally indicated as 210, which comprises an elongate plate member 212 having a plurality of internally threaded apertures, each indicated as 214, formed along the length. of the length thereof and a trochanteric handle portion 216 formed in the upper end portion of the elongated plate member 212, which has at least one internally threaded opening 218 for receiving a corresponding plurality of externally threaded screws or fasteners 40 for securing the plate to bones 210 to the patient's bone 14, including the femur adjacent the hip prosthesis 218. At least one clamping clip 10 is then placed around the bone 14 and over the elongated plate member 212 of the bone plate 210, aligning the opening internally threaded 38 of a pair of collet elements 16 and 18 with corresponding internally threaded openings 214, for inserting a screw or corresponding anchor closure 40 therethrough and into bone 14.
    [0012] Figure 6 shows an alternative embodiment of the present invention. Specifically, the clamping clip 10 comprises a first arcuate clip element 16 and a second arcuate clip element 18 (a pair of separate clip elements).
    [0013] Each arcuate collet element 16 and 18 includes a concave inner surface 24, at least one of them having at least one peak-like element or protrusion 26 extending outwardly from the concave inner surface 24 to each other. engaging the surface of bone 14 to hold the clamping clip 10 in place. Furthermore, at least one pressure relief recess or indentation 28 is formed in the concave inner surface 24 of at least one of the clip elements to preserve blood flow in the patient's limb when the clamping clip 10 is held in place.
    [0014] The clamping clamp 10 additionally includes an adjustment device, generally indicated as 30, to clamp the arcuate clamp elements 16 and 18 together around the bone 14, forcing the spike-like element or bulge 26 against the surface. of bone 14. The adjustment device 30 comprises an externally threaded element 32 configured to be threaded through an internally threaded portion or channel 34 formed in the first arcuate clamp element 16 and into an internally threaded portion or recess 36 formed in the second arcuate forceps element 18 to tighten and secure the clamping forceps 10 in place around the bone 14.
    [0015] As best shown in Figure 7, the first arcuate clamp element 16 and the second arcuate clamp element 18 do not fully surround the bone 14, leaving a space between the free or distal ends to ensure continued circulation.
    [0016] Figure 8 represents a collet assembly 300 according to another embodiment of the invention. The collet assembly 300 includes first and second arcuate collet elements 302, 304 positionable on a bone 14. The first collet element 302 extends from a first end 306 along a first arm 308 to an arcuate structure 310 that terminates. on a second end (not shown). First arm 308 extends linearly away from arcuate structure 308, along an axis which, when assembly 300 is positioned as desired over a target portion of bone, extends substantially parallel to a diameter of bone 14, along which a clamping force is applied by the first and second gripper members 302, 304. The first arm 308 includes a first elongated channel 312 that extends into it from the first end 306, along an axis. longitudinal 3L. A length of groove 312 is selected to accommodate a length of a locking screw 350 to be inserted therein in an operational configuration, as will be described in more detail below. The first channel 312 in this embodiment includes a thread 314 threadedly interconnected to a shank 356 of the locking screw 350.
    [0017] The second gripper element 304 extends from a first end 318, along a second arm 322 distally to an arcuate structure 326, ending in a second end 320 which, in this embodiment, is configured to be engaging a bone plate and securing it in contact with a target portion of bone 14. Second arm 322 includes a first contoured surface 328 to correspond with a portion of bone it will contact. In this embodiment, since bone 14 is generally cylindrical, similarly surface 328 is curved. An outer surface 330 of second arm 322 opposite surface 328 extends substantially parallel to longitudinal axis 3L. Second arm 322 includes second and third channels 332, 334 extending therethrough from respective first ends 333, 335 to a second common end 340. Second channel 332 extends along longitudinal axis 3L and is dimensioned to slidingly receive a portion of the first arm 308 thereon. The third channel 334 extends along an axis 30L inclined with respect to and crossing the longitudinal axis 3L so that a pressure screw 360 inserted therethrough extends into the second channel 332. As will be described in more detail with respect to the exemplary method below, a tapered tip 370 of the pressure screw 360 passes through the third channel 334 to frictionally engage the outer surface 316 of the first arm 308 to provisionally secure the first and second arms 308, 322 together before inserting the locking screw 350 into the second groove 332.
    [0018] The arcuate structure 326 of the second arm 322 further comprises a relief recess or indentation 336 substantially similar to relief recess 28 and configured to allow insertion of a bone plate 210 therethrough to be held against bone 14, as described in greater detail in relation to the previous modalities. As will be understood by those skilled in the art, the shape and size of relief recess 336 can be modified to fit the dimensions of bone plate 210. Bone plate 210 may be any bone plate known in the art, and may be selected to adapt to the requirements of a target bone stabilization procedure. A portion of arcuate structure 326 in relief recess 336 may include an opening 338 extending therethrough and configured to align with an opening in bone plate 210 to optionally allow insertion of a bone fixation element ( for example, a bone screw) through and into the bone, as those skilled in the art will understand.
    [0019] According to an exemplary method according to the invention, the first and second forceps elements 302, 304 are positioned over a target portion of bone 14 using a known minimally invasive insertion device. Specifically, the first forceps element 302 is removably attachable to a manipulation tool (not shown) which allows introduction of and aids in positioning the first forceps element 302 over bone 14. The manipulation tool (not shown) it also guides the insertion of the second clamp element 304 into the body and over the bone 14 to mount the first and second clamp elements 302, 304 together locally. As will be described in more detail below, the pressure screw 360 is positioned in the third channel 334 prior to insertion of the second forceps element 304 over the bone. Specifically, the snap screw 360 may initially be housed in the third groove 334 in an insertion configuration in which the distal conical tip 370 does not cross the second groove 332. In an exemplary embodiment, the bone plate 210 is placed and locked into the bone 14 prior to insertion of forceps assembly 300. In another embodiment, bone plate 210 is positioned between relief recess 336 and bone 10 after the forceps assembly has been provisionally secured to the bone. First arm 308 is then slidably inserted into end 340 and into second channel 332, until arcuate structures 310, 326 engage with an outer surface of bone 14 to prevent further movement. Frictional engagement between the outer surface 316 of the first arm 308 and the second channel 332 prevents the first and second arms 302, 304 from being inadvertently disengaged from one another. The pressure screw 360 is then tightened against the first end 335 of the third channel 334, until the tapered tip 370 frictionally engages the outer surface 316 of the first arm 308 to provisionally secure the first and second collet elements 302, 304 to the bone 14. Snap screw 360 extends from a first end 362 having a head 364 and along a shank 366 to a distal end 368 having a tapered tip 370. A portion of the shank 366 includes a thread 365 that engages engages a thread on the outer surface of third channel 334. Head engagement 364 with a reduced diameter portion 335 of third channel 334 prevents set screw 360 from applying excessive force to first arm 308. forceps elements 302, 304 have been provisionally locked onto the bone 14, the manipulator is removed from the body.
    [0020] The locking screw 350 is then inserted into the first end 333 of the second channel 332. The locking screw 350 extends from a first end 352 having a head 354 and along a threaded rod 356 to a distal end 358 The thread of the stem 356 is configured to engage the threads 314 of the first channel 312. The head 354 is sized to prevent insertion of the same in the second channel 332. In an operational configuration, when the locking screw 350 is moved through the second channel 332 and into the first channel 312, the first and second clamp elements 302, 302 are moved toward each other to apply a radial compressive force to the bone 14.
    [0021] Figure 9 represents a collet assembly 400 according to another embodiment of the invention. Collet assembly 400 is formed substantially similar to collet assembly 300 of Figure 8, with like elements being identified with like reference numerals. Collet assembly 400 includes first and second collet members 302, 304 which include first and second collet arms 408, 422 substantially similar to first and second collet arms 308, 322. Collet assembly 400 includes a locking screw 350 and a set screw 460 substantially similar to the locking screw 350 and the set screw 360. The set screw 460 extends from the first end 362 having the head 364 and along a threaded rod 366 to a distal end 368 which has a threaded tip 470. The threaded tip 470 includes a thread 417 at a range that corresponds to the thread on an outer surface 416 of the first arm 408. The range of the threaded tip 470 may be greater than a range of the threaded shank 366. It will be noted, however, that the threaded tip 470 and the threaded shank 366 can each be formed with any range of threads without departing from the scope of the invention.
    [0022] In an exemplary embodiment, a portion of an outer surface 416 of the first arm 408 includes a thread 417 threadably engaged with the threaded tip 470 of the pressure screw 460. The thread 417 extends along a length of the first arm 408 and may be formed only on a portion of outer surface 416 which, in an operative configuration, is open to third channel 334. An outer portion of outer surface 416 separated from thread 417 may be substantially smooth. In another embodiment of the invention, the outer surface 416 may include one of teeth, an interlocking surface, or the like for engaging a matching provided structure or a surface of the second channel 432, or a distal end of a pressure screw to form a ratchet mechanism, as those skilled in the art will understand.
    [0023] According to an exemplary method of using the forceps assembly 400, the first arm 408 is slidably inserted into the second channel 332 until the arcuate structures 310, 326 come into contact with an outer surface of the bone 14. pressure screw 460 is then threaded into the first end 335 of the third channel 334 until the threaded tip 470 threadedly engages with the thread 417 on the outer surface 416 of the first arm 408. Specifically, as described in greater detail above in connection with the assembly of collet 300, pressure screw 460 may be partially inserted into third channel 334 prior to insertion of second collet member 304 into the body. The pressure screw 460 can subsequently be moved further into the third groove 334 so that mechanical interaction of the threaded tip 470 with the thread 417 provisionally holds the first and second arms 302, 304 in position over the bone 14. The screw clamp 350 is then directed through the second channel 332 and into the first channel 312, the threaded engagement between the threaded rod 356 and the threads of the first channel 312 moving the first and second collet elements 302, 302 towards each other and applying a radial compressive force to the bone 14. As those skilled in the art will understand, the pressure screw 460 and the locking screw 350 may each need to be adjusted any number of times to achieve a desired first and second tightening. second arms 302, 304 over the bone 14. In an alternative embodiment, the locking screw 350 may be removed from the assembly 400 so that only the locking screw are 460 apply a compressive force against the bone 14.
    [0024] The collet assembly 500 shown in Figure 10 is substantially similar to the collet assembly 300 of Figure 8, with like elements identified by like reference numerals. Collet assembly 500 includes first and second collet elements 302, 304 that include first and second arms 508, 522. Second arm 522 includes second channel 532 and third channel 534. Second channel 532 is substantially similar to second channel 332 and extends through second arm 522, from a first end 533 to a second end (not shown) open to one end of second arm 522. Third channel 534 extends through second arm 522 of a first end 535 and along a longitudinal axis 5L substantially parallel to axis 3L, to a second end 537 within second arm 522. Third channel 534 is sized to receive therethrough a pressure screw 560 substantially similar to pressure screw 360, but having a substantially blunt, unthreaded distal tip 380. The third channel 534 may include a thread configured to threadably engage. el to a threaded rod of the pressure screw 560.
    [0025] The second arm 522 additionally includes a tab 550 that intersects the second and third channels 532, 534. The tab 550 extends from a first end 552 connected to an outer wall of the second arm 522 adjacent to the second channel 532 to one end. free 554 within third channel 534. In a region crossing second channel 532, tab 550 includes an opening 556 having an opening axis substantially aligned with axis 3L to allow insertion of first arm 508 therethrough. In a region crossing third channel 534, tab 550 is substantially flat and is sized to prevent pressure screw 560 from moving beyond it, as will be described in more detail in connection with the exemplary method below. Tab 550 is affixed only to the outer wall of second arm 522 at first end 552 and is therefore substantially deflectable within a selected range to allow tab 550 to apply a predetermined pressure to first arm 508 in an operational configuration, as also will be described in more detail below. Tab 550 further comprises an extension 558 configured and sized to separate free end 554 from second end 537 from third channel 534 by a predetermined distance, an extension length that conforms to an allowable range of deflection of free end 554.
    [0026] According to an exemplary method of using the collet assembly 500, the pressure screw 560 is partially inserted into the third channel 534 so that the blunt tip 570 is separated from the tab 550. The first and second collet elements 302, 304 are then inserted into the body such that first arm 508 is slidably inserted into second channel 532, and arcuate structures 310, 326 contact an outer surface of bone 14. Pressure screw 560 is then advanced further into third channel 534 until blunt end 570 abuts tab 550. Further moving set screw 560 causes a deflection of tab 550 toward second end 537. tab 550 apply a frictional force to the first arm 508 inserted therethrough, enough to prevent the first arm 508 from moving relative to the second arm 522. The engagement of the deflected tab 550 with the second of end 537 prevents tab 550 from being biased outside the predetermined range (i.e., prevents a fracture of tab 550 or injury to first arm 508). Lock screw 350 (not shown) is then inserted through second channel 532 and into first channel 312 to move first and second collet elements 302, 302 together and apply a radial compressive force to bone 14.
    [0027] The collet assembly 600 shown in Figure 11 is substantially similar to the collet assembly 300 of Figure 8, with like elements being identified by like reference numerals. Collet assembly 600 includes first and second collet elements 302, 304 which include first and second arms 608, 622. First arm 608 is substantially similar to first arm 608 and includes a channel 312 having a thread 614. transverse hole 615 extends through first arm 608 along an elongated transverse hole axis that extends substantially orthogonally to the longitudinal axis 3L of first channel 612 from a first end 616 to a second end 617. Exemplary, the transverse hole 615 extends through both outer walls of the first arm 608, so that a pin (not shown) inserted therethrough and through a pin hole 690 effectively secures the first and second gripper elements 302 , 304 each other, as will be described in more detail below. In another embodiment, however, the transverse hole 615 may extend through only one wall of the first arm 608 without departing from the scope of the invention. In an exemplary embodiment, the transverse hole 615 has a length of approximately 30 ± 4 mm to define a corresponding range of motion of the first and second gripper elements 302, 304 towards and away from each other.
    [0028] The second arm 622 includes a second channel 632 extending therethrough and is substantially similar to the second channel 332 of Figure 8. A thread 660 is housed completely within the second channel 632 in an operational configuration. Thread 660 extends from a first end, including a recess connected to driver 662, and along an elongated threaded rod 664 to a second end 666. Second channel 632 additionally includes a longitudinal slot (not shown) that allows for a wall 680 extends therethrough and into second channel 632 to substantially divide second channel 632. Wall 680 extends from a first end 682 and includes a first wall portion 684 having a first height. In an exemplary embodiment, the first height is selected to prevent thread 660 from moving past it and out of the second groove 632, while also allowing a drive mechanism (not shown) to be inserted beyond it to allow drive. of thread 660. A second wall portion 686 of wall 680 extending away from first wall portion 684 is formed with a height selected to prevent extension thereof into second channel 632. A length of second wall portion 686 is substantially equivalent to the length of thread 660 to allow thread 660 to be placed between first wall portion 684 and third wall portion 688. Third wall portion 688 extends into second channel 632 for a selected distance to prevent movement of thread 660 beyond it so that a pin hole 690 extending through it along an axis 6L lines up with the hole. the transverse 615. A diameter of pin hole 690 is substantially equivalent to a diameter of a pin (not shown) inserted through it in an assembled configuration. Specifically, the pin (not shown) extends through the transverse hole 615 and the pin hole 690 along the axis 6L, and is permanently attached to the collet assembly 600 (i.e., during fabrication). The pin (not shown) is axially movable along a length of the transverse hole 615, which defines a desired range of movement of the first and second collet elements 302, 304 relative to each other in a direction substantially perpendicular to an axis. longitudinal of the bone 14.
    [0029] The second collet element 304 also comprises a third channel 634 that extends into the arcuate frame portion 326 separate from the relief recess 336. The third channel 634 is threaded and configured to engage a positioning tool ( not shown) to provisionally secure the forceps 600 assembly to the bone 14.
    [0030] According to an exemplary method of using the clamp assembly 600, the positioning tool (not shown) is inserted through the third channel 634 to provisionally secure the assembly 600 over the bone 14. In a first insertion configuration, the pin (not shown) and the pin hole 690 are positioned towards the first end 616 of the transverse hole 615 so that the first and second collet elements are moved radially away from each other to allow insertion of the same over the Bone 14. A drive mechanism (not shown) is then inserted into recess 662 to move screw 660 forward, causing the pin (not shown) to advance toward the second end 617 of transverse hole 615. As described above, the positioning of screw 660 between first wall portion 684 and third wall portion 688 prevents loss of screw 660 in soft tissue of the body. This movement causes the first and second clamp elements 302, 304 to move radially inward to apply a radial compressive force to the bone 14.
    [0031] The collet assembly 700 shown in Figure 12 is substantially similar to collet assembly 300 of Figure 8, with like elements being identified by like reference numerals. However, given that collet assemblies 300600 are slidably placed in engagement with each other, the exemplary embodiment of Figure 12 includes first and second collet elements 702, 704 pivotally secured to one another around an axis. of a pivot pin 706. The first and second collet elements 702, 704 are each substantially arcuate to generally conform to the contour of an outer surface of the bone 14. The second collet element 704 includes a recess of relief 336 to accommodate the bone plate 210, as described in greater detail above. Pivot pin 706 can be permanently attached to the first and second collet elements 702, 704 (e.g., by laser welding, etc.) to allow pivotal movement of the first and second collet elements 702, 704 relative to each other within a predetermined angular range.
    [0032] The second collet member 704 includes a groove 708 extending therethrough from a first end 710 to a second end 712. A portion of the groove 708 is threaded to thread a bolt 750 therethrough. Screw 750 extends from a first end including a head 752 and along a threaded shank 754 to a substantially blunt, unthreaded second end 756. In an exemplary embodiment, the channel 708 includes a first channel portion 714 having a first diameter and a second channel portion 716 having a second diameter smaller than the first diameter. The second channel portion 716 is sized to prevent movement of the head 752 therein to define a maximum insertion depth of the screw 750 within the channel 708. In a first exemplary embodiment, the channel 708 is positioned adjacent to an outer surface 718 of the second collet member 704 such that the screw 750 is positioned laterally relative to the pivot pin 706. Insertion of the screw 750 into the groove 708 thus applies a compressive force to an outer surface of the first collet member. collet 702 having a contact point 703, as will be described in more detail with respect to the exemplary method below. In another embodiment (not shown), channel 708 may be positioned adjacent a surface 720 of the second clamp surface configured to be adjacent an outer surface of bone 14 in an operative configuration, at least a portion of surface 720 entering. in direct contact with bone 14. In this embodiment, screw 750 inserted through channel 708 may contact a first portion of the bone-contacting surface of the first forceps element 702. The bone can be angled and sized so that the force applied thereto by the screw 750 forces the first forceps element 702 into a radially compressive configuration over the bone 14. Those skilled in the art will understand that, alternatively, the screw 750 can extend to inside a threaded opening in the second collet member 704, so that the interaction between a threaded surface of the opening and the screw 7 50 rotate the second gripper element 704 with respect to the first gripper element 702.
    [0033] In one embodiment of the invention, the first and second gripper elements 702, 704 may have a substantially uniform width and thickness. In another embodiment, portions of the first and second forceps elements 702, 704 configured to directly contact bone 14 in the operative configuration may have a greater thickness to increase the surface area of contact thereof with bone 14. A free end 705 of the second forceps member 704 further comprises one or more plate holes 707 extending therethrough, the plate holes 707 permitting passage of bone screws (not shown) therethrough and into the bone. 14. As those skilled in the art will understand, these bone screws (not shown) provide an additional mechanism to secure the assembly 700 to the bone 14.
    [0034] According to an exemplary method in accordance with the invention, the first and second forceps elements 702, 704 are positioned over a target portion of the bone 14. The screw 750 can be preloaded into the forceps assembly 700 before inserting it into the body (i.e., in a retracted position in which the second end 756 does not extend away from the second end 712 of channel 708 or is otherwise separated from a contact point 703). In another embodiment, screw 750 may be inserted into the frame after collet assembly 700 has been provisionally positioned over bone 14. In an exemplary embodiment, assembly 700 may include a bias element (e.g., a spring loaded element ) which biases the first and second collet elements 702, 704 toward a radially expanded configuration to aid in positioning the collet assembly 700 over the bone 14. As those skilled in the art will understand, the first and second collet elements 702, 704 can be rotated through a predetermined range of angles relative to one another prior to insertion of screw 750 to allow insertion of forceps 700 over bone 14, a maximum opening angle of the first and second forceps elements 702, 704 being an angle at which the contact point 703 contacts the second end 712 of opening 708. Screw 750 can then be advanced to into channel 708 until distal end 756 contacts a contact point 703 extending from first collet member 702. As screw 750 is advanced, distal end 756 engages with contact point 703 forces the first collet element 702 to revolve around the pin 706, closing the first and second collet elements 702, 704, respectively, over the bone 14 and increasing a compressive grip of the collet assembly 700 on the bone 14.
    [0035] It will be evident to those skilled in the art that various modifications and variations can be made in the structure and methodology of the present invention, without deviating from the spirit or scope of the invention. Accordingly, it is understood that the present invention encompasses modifications and variations of this invention, provided they are within the scope of the appended claims and their equivalents.
    权利要求:
    Claims (8)
    [0001]
    1. Bone fixation forceps (700), comprising: a first arcuate forceps element (704) which conforms to a shape of a target portion of a long bone (14) and extends between a first connecting end ( 710) and a first free end (705); a second arcuate clamp element (702) which conforms to a shape of the long bone target portion (14), a second connecting end (712) of the second arcuate clamp element (702) being hingedly secured to the first. connecting end (710) of the first arcuate collet member (704), the second arcuate collet member (702) extending between the second connecting end (712) and a second free end (756), characterized in that further comprising: a screw (750) received in the first arcuate collet member (704) which passes outwardly from the first arcuate collet member (704) to be in boundary position with a contact point portion (703) of the second member of arcuate collet (702), so that as the bolt (750) is extended further away from the first element (704) the bolt (750) rotates the second arcuate collet element (702) with respect to the first element of arcuate clamp (704) to move the first and the second free ends (705, 756) toward each other to apply a radial compressive force to the long bone (14).
    [0002]
    2. Bone clamp (700) according to claim 1, characterized in that the first and second arcuate clamp elements (704, 702) are connected to each other by a pin (706) and are pivotal around a pivot axis of the pin (706).
    [0003]
    3. Bone clamp (700) according to claim 1, characterized in that the screw (750) is received within a groove (708) that extends through the first arcuate clamp element (704) , along a channel axis (708) that extends orthogonally to a longitudinal axis (3L) of the long bone (14).
    [0004]
    4. Bone fixation forceps (700), according to claim 3, characterized in that a portion of the channel (708) is threaded that engages by threading to the threads of the screw (750).
    [0005]
    5. Bone clamp (700) according to claim 3, characterized in that the contact point portion (703) extends outward from the second arcuate clamp element (702) to cross the axis of the channel (708).
    [0006]
    6. Bone fixation forceps (700) according to claim 3, characterized in that a first portion of the channel (714) has a diameter selected to slideably receive a larger diameter portion of the screw (750) a second channel portion (716) having a reduced diameter relative to the first channel portion (714) preventing insertion of the larger diameter portion of the screw (750) into the second channel portion (716).
    [0007]
    7. Bone clamp (700) according to claim 1, characterized in that it further comprises a relief recess (336) formed in one of the first and second arcuate clamp elements (704, 702), the relief recess (336) receiving a bone plate (210) therein.
    [0008]
    8. Bone clamp (700) according to claim 7, characterized in that the relief recess (336) includes an opening (338) extending therethrough, the opening (338) lining up with a hole in the bone plate (210) extending through the bone plate (210) allowing insertion of a bone fastener therethrough and into the long bone (14).
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    同族专利:
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    KR20190084347A|2019-07-16|
    JP2014519885A|2014-08-21|
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    BR112013028856A2|2017-08-01|
    WO2012154947A1|2012-11-15|
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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]|
    2019-10-08| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-10-06| B07A| Technical examination (opinion): publication of technical examination (opinion) [chapter 7.1 patent gazette]|
    2021-04-13| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-05-18| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 10/05/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/068,397|US20120290017A1|2011-05-10|2011-05-10|Bone fracture fixation clamp|
    US13/068,397|2011-05-10|
    PCT/US2012/037304|WO2012154947A1|2011-05-10|2012-05-10|Bone fracture fixation clamp|
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