WO2004026155A1

WO2004026155A1 - A bone grasping instrument for seizing bones

Info

Publication number: WO2004026155A1
Application number: PCT/CN2003/000564
Authority: WO
Inventors: Zixin Fu
Original assignee: Zixin Fu
Priority date: 2002-09-21
Filing date: 2003-07-25
Publication date: 2004-04-01
Also published as: AU2003255076A1

Abstract

The present invention relates to a bone grasping instrument for seizing bones. The said bone grasping instrument includes a tongs body (1) and an adjustment rod (6). The said tongs body (1) is composed of a pair of tongs claws (4) and tongs lever (5), and the tongs claws are at the tops of the tongs levers. The tongs claw (4) and the tongs lever (5) on one side is integrated, and the tongs claw (4) and the tongs lever (5) on the other side is pivotally connected. The said two tongs levers are mutually pivotable about an axis of rotation (7). The tail of the tongs lever on one side and one end of the adjustment lever (6) is mobilizablely connected, and a U slot (51) for fixing the said adjustment rod is provided on the tail of the tongs lever on the other side. The said adjustment rod (6) is a mobilizable arm with screw thread (61) and a nut (62).

Description

Bone holding device

The utility model relates to a medical orthopedic surgical instrument, in particular to a bone holder for resetting a fractured end and maintaining the position after the reset, so as to facilitate internal fixation.

Background technique

At present, the domestic and foreign surgical instruments used to maintain fracture alignment and internal fixation with steel plate screws are traditional three-jaw bone holders, which have the following deficiencies in actual clinical use: 1. Difficult to insert. The three claws must be inserted from the side of the fracture. Therefore, in soft muscle incisions, more soft tissue must be peeled off before being inserted. 2. Instability. Because the shape of the claw grip is fixed, it is very difficult to fix a three-claw fixation on a long oblique and spiral unstable fracture, a small diameter and an irregularly shaped bone segment. 3. The internal fixing steel plate is inconvenient to place. While tightening the three claws, it is necessary to maintain good alignment of the fracture ends and to place the steel plate accurately. 4. The steel plate is easy to shift. Because there is only one claw above the steel plate, the steel plate is easy to slide or rotate. Therefore, when the traditional three-jaw bone holder is used, the surgical incision is large, the operation time is long, the patient is seriously injured, the fracture healing is slow, and even the operation fails and becomes disabled.

Summary of the Invention

The purpose of the utility model is to design a new type of bone holder, which overcomes the above-mentioned shortcomings of the traditional three-jaw bone holder, and provides an easy-to-place in use, good fixation to various bone shapes, and convenient placement of the internal fixation steel plate. And can make the placed steel plate does not shift the bone holder. By using the utility model, the operation time can be shortened, the patient's pain can be reduced, the bone fracture healing can be accelerated, and the operation success rate can be improved.

The technical solution for achieving the purpose of the present utility model is: a bone holder, comprising a forceps body and an adjustment rod, the forceps body is composed of a pair of forceps and forceps, the forceps are located on the top of the forceps, and the two forceps are held together Type, the two jaws have a reasonable inner space; one jaw and the jaw are integrated, and the other jaw and the jaw are sleeved by a rotating shaft; the two jaws are connected by a central shaft; the jaw on one side The tail part is movably connected to one end of the adjustment lever, and the tail part of the pliers handle on the other side is provided with a shape groove that can fix the adjustment lever; the adjustment lever is a movable arm with threads and nuts.

The above two jaws have a reasonable inner space, which means that there is an inner space between the jaws where steel plates can be placed. The rotation shaft connecting the pliers handle and the jaw may be provided on the caliper handle, a sleeve is provided on the jaw, and the claw is sleeved on the handle; the rotation shaft may also be provided on the jaw, and the sleeve is provided on the caliper handle. The handle is sleeved on the jaw; the jaw can rotate on its own longitudinal axis.

When in use, after maintaining the fracture alignment, the forceps are inserted from both sides of the fracture end. Because a shaft sleeve is connected between the forceps handle and the jaws on one side, the jaws of one side can rotate on its own longitudinal axis, so the forceps on both sides are held together. When the sides can be based on the shape of the bones,

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Replacement page (Article 26) The jaw spacing is automatically adjusted to bite the two ends of fractures of different calibers, so that the fracture ends are well aligned, and then the adjustment screw is used to maintain the alignment.

A further improvement of the utility model is a bone holder for fixing joint fractures. The jaws on both sides have a three-jaw combined grip, the jaws on one side have a tooth shape, and the rotatable jaws have two teeth. The tooth ends are pointed. When in use, it forms three groups of concentric forces through the claw tips on the top of the jaw to firmly press and fix the fracture pieces with extremely irregular shapes, so that various required internal fixations can be easily fixed.

Another improvement of the present utility model is to respectively add an extension handle to the tail portions of the two pliers handles, and a sleeve is provided at the front portion of the extension handle. There is a ring or a hook, the sleeve is provided with a "Π" -shaped notch to avoid the adjustment rod at the tail of the pliers handle; the sleeve can also be provided with a hook screw, and a fixed hook is provided at the corresponding part of the two pliers handle tails Screw holes. In this way, it is easier for the operator to hold it during use. In order not to hinder the next step of drilling and drilling, after maintaining the fracture position, loosen the screws of the pliers handle on the sleeve extension sleeve and remove the sleeve extension handle.

As a further improvement of the utility model, a central hole is provided on the above-mentioned central shaft, and a steel plate fixing member is connected to one or both sides of the hole; the steel plate fixing member mainly consists of a fixed side block and a movable pressing member, and is fixed. There is an axial screw hole in the middle of the side block, and a convex shaft extending laterally in the middle of the radial rear surface. The diameter of the convex shaft is compatible with the central shaft hole, and the left and right sides have grooves, and the convex shaft is hung on In the central hole of the central axis of the caliper body; the movable lower pressing piece is in a "U" shape, and slide rails adapted to the grooves on both sides of the fixed side block are provided on the two side plates, and the slide rail and the grooves of the fixed side block are closely moved. In cooperation, the lifting screw is vertically connected to the middle of the bottom of the movable pressing member, and the fixed side block is sleeved on the lifting screw through the central screw hole. In order to closely contact the steel plate fixing member with the steel plate and better fix the steel plate, the contact surface between the bottom of the movable pressing member and the steel plate can be made into an arc surface. In order to facilitate the operation of the lifting screw, a jack is provided at the top of the screw, one end of the long handle sleeve is inserted into the hole, and the other end of the long handle is used for lifting operation.

During use, the steel plate is inserted from the inner space of the jaws on both sides, and one or both sides of the steel plate fixing parts are hung in the shaft hole in the pliers body. , And finally screw in the screws to fix the steel plate.

The beneficial effect of the utility model is that the jaws of the bone-holding device are inserted from both sides of the fracture end to be fixed on both sides, and the adjusting rod at the tail of the handle is pressed to maintain the fracture end in alignment, and the fracture can be loosened after maintaining the alignment. Unscrew the screw of the pliers handle on the sleeve of the extension handle, remove the sleeve extension handle, and insert the steel plate from the inner space left between the jaws on both sides, and hang the two steel plate fixing parts on the pliers body. In the center shaft, the movable lower pressing member adjusted by the lifting screw is in a door-type depression, and the movable lower pressing member with a curved surface rides on the steel plate to fix the steel plate, and finally screws the screw to fix the steel plate. After tightening a screw on the steel plate, the side steel plate fixing member can be removed, so as not to hinder the drilling of the screw closest to the pliers body.

The utility model has the following advantages: 1. Easy to insert. The forceps are inserted from both sides of the fracture end, so the soft group is peeled Weaving is small and easy to insert. 2, fixed firmly. The bone holding forceps body has a double-sided embracing structure, and an automatic device can automatically bite both ends of fractures with different calibers, thereby maintaining the fracture end alignment very firmly and stably. 3. The steel plate is inserted into the fracture from the inner space left between the jaws, which is convenient for placement and will not lose sight of this. 4. The steel plate will not shift. The steel plate fixing parts on both sides press the steel plate at four points on both sides, and the steel plate is very stable.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention

FIG. 2 is a schematic structural diagram of Embodiment 2 of the present invention

Figure 3 is a schematic side view of Embodiment 2 of the present invention

Figure 4 is a schematic cross-sectional view of a steel plate fixing member

Figure 5 is a schematic cross-sectional view of the A-A

FIG. 6 is a schematic structural diagram of Embodiment 3 of the present invention

FIG. 7 is a schematic side view of Embodiment 3 of the present invention

FIG. 8 is a schematic structural diagram of Embodiment 4 of the present invention

FIG. 9 is a schematic side view of Embodiment 4 of the present invention

In the picture: pliers body-1, steel plate fixings-2, extension handle -3, jaw-4, tooth end-41, pliers handle-5, groove-51, adjusting screw-6, thread-61, nut- 62, Bottom shaft-7, Center hole-71, Convex shaft-8, Rotary shaft-9, Shaft hole-10, Movable push-down piece-11, Fixed side block-12, Screw hole-121, Lifting screw-13, Insert Hole-131, Groove-14, Slide rail-15, Mounting screw-16, Long handle sleeve-17, Sleeve-18, Notch-19, Mounting screw screw hole-20

detailed description

The following is a description with reference to the drawings.

Example 1

As shown in FIG. 1, the bone holder includes a forceps body 1 and an adjustment screw 6. The forceps body 1 is composed of a pair of forceps 4 and a forceps 5, the forceps 4 are located on the top of the forceps 5, and two forceps 4 is two-claw-shaped, and the two jaws 4 are in a hug type, and a reasonable inner space is left between the two jaws 4, so that the steel plate can be inserted; the jaw 4 on one side is integrated with the jaw handle, and the other 5 is on the other side. The head is provided with a rotating shaft 9, the jaw 4 is connected with the handle 5 through the shaft hole 10 on the inner side of the tail, and the jaw 4 can be rotated on the rotating shaft 9; the two handles 5 are connected through the central shaft 7; the handle 5 on one side The tail part is connected with the adjustment screw 6 by a hinge, and the other end of the pliers handle 5 is provided with a "U" -shaped groove 51; the adjustment screw 6 is provided with a thread 61 and a nut 62. The 6-end of the adjusting screw can also be plug-in connected to one end of the tail of the pliers handle 5.

When in use, the forceps body 1 is inserted from both sides of the fracture end, because a shaft sleeve is connected between the forceps handle 5 and the jaw 4 on one side. The jaws 4 can rotate on its own longitudinal axis, so when the jaws on both sides are engaged, the jaw distance can be automatically adjusted according to the shape of the bones, and the two ends of fractures of different calibers can be engaged, so that the fracture ends are well aligned. The adjusting screw 6 One end is placed in the groove 51 at the tail of the pliers handle 5. The nut 62 is tightened to apply pressure to maintain the fractured face in position. The steel plate is easily inserted from the inner space left between the two jaws 4.

Example 2

As shown in FIG. 2, this embodiment is the same as the pliers body 1 and the adjustment stalk 6 of the embodiment 1, except that the rotating shaft 9 is disposed laterally on the head of the caliper handle 5 and the claw 4 passes through the shaft hole on the outer side of the tail. 10, connected with the pliers handle 5; the pliers handle 5, the claw 4 the central shaft 7 of the caliper body has a central hole circle 71, and the steel plate fixing member 2 is hung in the central shaft 71 of the caliper body shaft. As shown in FIG. 4, the steel plate fixing member 2 is mainly composed of a fixed side block 12, a movable lower pressing member 11 and a lifting screw 13. The center cross section of the fixed side block 12 is shown in FIG. 5, and an axial screw hole 121 is provided in the middle. The central part of the radial rear surface is provided with a convex shaft 8 corresponding to the central shaft center hole, with wedge-shaped grooves 14 on the left and right sides, and the convex shaft 8 is hung in the center shaft 71 of the center shaft of the forceps; It has a "U" shape, and the two sides are provided with corresponding sliding rails 15 with a groove 14. The bottom is connected with a lifting screw 13 and the fixed side block 12 is sleeved on the lifting screw 13 through a central screw hole 121. The wedge-shaped slide rail 15 and the groove 14 of the fixed side block 12 are closely matched with each other; the movable lower pressing member 11 realizes a gate-like downward pressing dynamic cooperation through a lifting screw 13 connected to the movable lower pressing member. The above-mentioned groove 14 and slide rail 15 may also have other shapes, for example, the cross-section is "Ω" shaped. In order to facilitate the operation of the lifting screw 13, a jack 131 is provided at the top of the screw 13, one end of the long handle sleeve lever 17 is inserted into the hole, and the other end of the long handle sleeve lever 17 is lifted, as shown in FIG. 3.

During use, the steel plate is inserted from the inner space of the jaws 4 on both sides, and the steel plate fixing piece 2 on one or both sides is hooked into the shaft hole 71 of the caliper body through the convex shaft 8 and the movable lower pressing piece is adjusted by the lifting screw 6 11 press down the gate to fix the steel plate, and finally screw in the screws to fix the steel plate. In order to make the steel plate fixing part closely contact the steel plate and better fix the steel plate, the contact surface between the bottom of the movable pressing member 11 and the steel plate can be made into an arc surface, as shown in FIG. 4.

Example 3

As shown in FIGS. 6 and 7, this embodiment is the same as the pliers body 1 and the adjustment rod 6 of the embodiment 1, and the steel plate fixing member 2 is the same as the embodiment 2, except that the tail portions of the two caliper handles 5 are respectively set. The extension handle 3 is connected in order to keep the vertical direction when the drill is drilled on the steel plate. The pliers handle 5 is generally shorter. For more convenient operation, an extension handle needs to be provided. A sleeve 18 is provided at the front portion of the extension handle 3, and the inner hole of the sleeve 18 corresponds to the shape of the tail portion of the pliers handle 5. The tail portion of the extension handle 3 is provided with a ring or a hook to facilitate the operator's grasp. A "Π" -shaped notch 19 of the adjusting rod 6 to avoid the tail of the pliers handle is provided; a mounting screw 16 can also be provided on the sleeve, and a screw hole 20 for fixing the mounting screw is provided at the corresponding position on the tail of the pliers handle. The extension handle 3 is sleeved on the tail of the pliers handle 5, and the side of the sleeve 18 with a "Π" shaped notch 19 is set On the outside of the pliers handle 5 to avoid the adjustment lever at the rear of the pliers handle. Fix the mounting screw 16 in the screw hole 20 at the tail of the handle 5. In order not to hinder the next drill hole drilling, after maintaining the fracture position, loosen the screws of the pliers handle on the sleeve extension sleeve and remove the sleeve extension handle 3.

Example 4

As shown in FIGS. 8 and 9, this embodiment is the same as the caliper body 1, the adjustment lever 6, and the extension handle 3 of the embodiment 3, except that the pliers claws 4 on both sides are of a three-claw combination, and the pliers on one side The claw 4 has a tooth shape, the rotatable jaw 4 has two tooth shapes, and the tooth end 41 has a sharp tooth shape. When the bone at the fracture is irregularly shaped, such as at the joint, three points are fixed from the upper end of the fracture with the three-tooth jaws 4, which form three sets of concentric forces through the claw tips at the top of the jaws 4 firmly against the shape. Regular fracture pieces are squeezed and fixed.

Claims

Rights request

1. A bone holder, comprising a forceps body (1) and an adjustment rod (6), the forceps body (1) is composed of a pair of forceps (4) and forceps (5), and the forceps (4) are located at The top of the pliers handle (5) is characterized in that the two pliers claws (4) are held together, and a reasonable inner space is left between the two pliers claws (4); one side of the pliers claws (4) and the pliers handle (5) As a whole, the claws (4) on the other side and the shank (5) on the other side are sleeved with a rotating shaft (9); the two pliers handles (5) are connected through the middle shaft (7);

(5) The tail is movably connected to one end of the adjusting screw (6), and the pliers handle (5) on the other side is provided with a "U" -shaped groove (51) at the rear to fix the adjusting rod; the adjusting screw (6) is A movable arm with threads (61) and nuts (62).

2. The bone holder according to claim 1, characterized in that the jaws (4) on both sides are of a three-jaw clamping type, and the jaws (4) on one side are tooth-shaped and rotatable jaws ( 4) It is two-toothed, and the tooth end (41) is pointed.

3. The bone holder according to claim 1, further comprising two extension handles (3), a sleeve (18) is provided at the front of the extension handle (3), and the sleeve (18) The inner hole corresponds to the shape of the tail of the pliers handle, the extension handle (3) is provided with a ring or hook at the tail, and the sleeve (18) is provided with a notch to avoid the adjustment lever of the tail of the pliers handle;

(3) The sleeves (18) are respectively sleeved on the ends of the two pliers handles (5).

4. The bone holder according to claim 3, wherein the sleeve (18) can further be provided with a hook screw (16), and a fixing is provided at a corresponding position on the tail of the two pliers handles (5). Screw holes for mounting screws.

5. The bone holder according to claim 1 or 3 or 4, characterized in that a central hole (71) is provided on the central shaft (7) connecting the two forceps handles, and one or both sides of the hole are provided. The steel plate fixing member (2) is connected; the steel plate fixing member (2) is mainly composed of a fixed side block (12) and a movable lower pressing member; an axial screw hole (121) is formed in the middle of the fixed side block (12), The central part of the radial rear surface is provided with a transverse convex shaft (8) corresponding to the central shaft center hole (71), and the left and right sides are provided with grooves (14); the movable lower pressing member (11) is in a "U" shape, Slide rails (15) adapted to the grooves (14) on both sides of the fixed side block are provided on the two side plates, and the slide rails (15) and the grooves (14) are tightly matched with each other, and the bottom of the movable pressing member (2) is movable The lifting screw (13) is vertically connected in the middle, and the fixed side block (12) is sleeved on the lifting screw (13) through the central screw hole (121); the steel plate fixing member (2) is hooked on the middle shaft of the caliper body through a convex shaft (8) Center hole (71).

6. The bone holder according to claim 5, wherein the outer surface of the bottom of the movable lower pressing member (11) is a curved surface.

7. The bone holder according to claim 5, further comprising a long handle sleeve rod (17), a jack (131) is provided at the top of the lifting screw (13), and a long handle sleeve rod (17) Into the hole (131).

8. The bone holder according to claim 2, further comprising two elongated handles (3), said

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Correction page (; Article 91) The front part of the long handle (3) is provided with a sleeve (18), and the inner hole of the sleeve (18) corresponds to the shape of the tail of the above-mentioned pliers handle. The tail of the extended handle (3) is provided with a ring or a hook, and the sleeve (18) A shape notch is provided on the tail of the pliers handle; the extended handle (3) is sleeved on the tail of the two pliers handles (5) respectively through a sleeve (18).

9. The bone holder according to claim 8, characterized in that the sleeve (18) can further be provided with a hook screw (16), and a fixing is provided at a corresponding place on the tail portion (5) of the two pliers handles Screw holes (20) for mounting screws.

Correction page (Article 91)