CN115486912A - Quick Positioning Fixtures - Google Patents

Abstract

The rapid positioning and fixing device of the present invention is a rapid positioning and fixing device for bridging combined internal fixation system fixation blocks in the treatment of human bone injuries. It is convenient for the doctor to perform the operation at the required position, the operation incision is small, and the installation time of the fixing block and the connecting rod in the operation is shortened. Improve the doctor's operability, reduce the risk of surgical displacement and screw locking failure, and solve the problem of small incision and minimally invasive surgical instruments for bridging combined internal fixation system fixed block products, including switches, pins, triggers, spring leaf locking screws, racks, Rack locking screw, spring leaf, handle, link bolt, mandrel, connecting rod, elastic inner sleeve, sliding locking sleeve, taper locking pin. The fast positioning and fixing device of the present invention is a structure composed of a connecting rod, an elastic inner sleeve, a sliding locking sleeve and a tapered locking pin. There are two tapered locking pins on the elastic inner sleeve, and the sliding locking sleeve 14 in Fig. 2 slides forward to make the elastic inner sleeve 13 contract and drive the two tapered locking pins 15-1, 15-2 to tighten the fixed block, The surgical operation is performed after the fixed block and the connecting rod are locked and fixed.

Description

Quick Positioning Fixtures

technical field

The invention relates to a medical device for orthopedic surgery, in particular to a rapid positioning and fixing device for bridging combined internal fixation system operations. Realize the locking and fixing of the fixed block and the connecting rod during the operation. Shorten the installation time of the fixation block and connecting rod during the operation. Improve the doctor's operability, reduce the risk of surgical displacement and screw locking failure, and solve the small incision minimally invasive surgical instrument of the bridging combined internal fixation system product, which is convenient for the doctor to perform the operation at the required position. This product belongs to medical equipment, including switches, pins, triggers, spring leaf locking screws, racks, rack locking screws, leaf springs, handles, link bolts, mandrels, connecting rods, elastic inner sleeves, sliding locking sleeves , Taper locking pin.

Background technique

At present, most manufacturers on the market only have spinal surgery reset instruments, which are composed of a handle, a mandrel, a connecting rod, and a push rod sleeve. The reset method is to pull the handle and drive the push rod sleeve forward to reset.

During the operation, since the fixed block of the bridge combined internal fixation system is taken out of the locking nut, the fixed block and the connecting rod are in a state of natural sliding. The threaded connection of the fixation block is misplaced, which results in too long time for installing the fixation block during the operation.

When the bone drill is drilled, because the guide drill belongs to the open space, the handle of the guide drill is small, and the doctor cannot control the direction by holding the handle of the guide drill, causing the drill hole to deviate from the center of the bone. Repeated drilling will reduce the holding force between the screw and the bone. There is a risk of screw pullout after surgery.

When installing the locking screw, because the fastening block and the connecting rod are in a natural sliding state, the angle and position of the locking screw cannot be accurately determined, resulting in failure to lock the screw and the fixing block.

When the locking screw and the fixation block are locked, other fixation blocks and connecting rods will move axially in the soft tissue, resulting in a deviation from the initial set implantation position.

Contents of the invention

The rapid positioning and fixing device of the present invention successfully solves the deficiencies in the prior art. The front end part of the elastic inner sleeve is matched with the fixing block by profiling, so that the elastic inner sleeve can be inserted into the fixing block more easily. In the case of small surgical incisions or minimally invasive operations, the handle is designed with a gun-type structure for more stable handholding. The trigger and the handle use a link bolt as the shaft to push the sliding locking sleeve by pulling the trigger drive mandrel. After the elastic inner sleeve is shrunk, the two tapered locking pins inside the elastic inner sleeve tighten the fixing block, so as to realize the locking and fixing of the fixing block and the connecting rod during the operation. Make it easier to operate.

The fast positioning and fixing device of the present invention is implemented by adopting the following scheme: the new fast positioning and fixing device includes a switch, a pin, a trigger, a spring leaf locking screw, a rack, a rack locking screw, a spring leaf, a handle, a link bolt, and a mandrel , connecting rod, elastic inner sleeve, sliding locking sleeve, tapered locking pin combined structure. The elastic inner sleeve 13 at the front end of the fast positioning and fixing device is designed to fit with the fixed block, and the sliding of the sliding locking sleeve 14 is adopted to make the front end of the elastic inner sleeve 13 taper shrink to surround the fixed block.

The specific method of use of the rapid positioning and fixing device of the present invention:

1. Hold the position of the long hole in the middle of the handle 9 and the trigger 3, insert the front end of the elastic inner sleeve 13 into the fixed block, make the two tapered locking pins 15-1, 15-2 reach the inner side of the fixed block, pull the trigger 3 to make it elastic Two tapered locking pins 15-1, 15-2 shrink the inside of the sleeve 13 to tighten the fixing block to the effective area of the rack 5, so as to realize the locking and fixing of the fixing block and the connecting rod. The quick positioning fixation instrument remains on the fixation block.

2. Use a Torx screwdriver to take out the locking screw on the fixing block through the through hole in the middle of the elastic inner sleeve 13. The guide drill is screwed into the fixed block through the through-hole channel in the middle of the elastic inner sleeve 13 .

3. Adjust the angle of the rapid positioning and fixing instrument to the parallel position in the middle of the bone and use a bone drill to drill holes. After the drilling is completed, take out the guide drill.

4. Screw the screw into the bone through the guidance of the through-hole channel in the middle of the elastic inner sleeve 13 until the screw is locked and fixed with the fixation block, the connecting rod, and the bone.

5. Screws and fixation blocks, connecting rods, and bone locking fixation. After the operation is completed, press the switch 1 with your fingers. The tail of the switch 1 pushes out the rack 5 and separates from the trigger 3. The left spring piece 7 and the right spring piece 8 automatically release the elastic force at the same time, and the trigger 3 Drive the mandrel 11 and the sliding locking sleeve 14 to reset. The elastic inner sleeve 13 automatically opens and breaks away from the fixing block, and the fast positioning and fixing device is taken out.

6. Through the operation steps of 1, 2, 3, 4, and 5 above, perform surgical operations on the locking and fixing of other screws and fixation blocks, connecting rods, and bones in sequence.

Description of drawings

The following is a further description of the novel rapid positioning and fixing device of the present invention in conjunction with the accompanying drawings.

Fig. 1 is a front view and a top view of the rapid positioning and fixing device of the present invention.

Fig. 2 and Fig. 3 are partial cross-sectional views of the working positions of the rapid positioning and fixing device and the fixing block of the present invention.

detailed description

With reference to accompanying drawing 1, Fig. 2.

1. Switch, 2-1, 2-2, two pins, 3. Trigger, 4-1, 4-2, two spring leaf locking screws, 5, rack, 6, rack locking screw, 7 , left spring piece, 8, right spring piece, 9, handle, 10, link bolt, 11, mandrel, 12, connecting rod, 13, elastic inner sleeve, 14, sliding locking sleeve, 15, taper locking pin, 15-1, 15-2 two taper locking pins.

A fast positioning fixation device:

A through hole is arranged in the middle of the connecting rod 12, a through hole is arranged in the middle of the elastic inner sleeve 13, and a through hole is arranged in the middle of the sliding locking sleeve 14.

Switch 1 is linked with trigger 3 via pin 2-1.

Left spring leaf 7 is linked with trigger 3 by spring leaf locking screw 4-1.

The rack 5 is linked with the handle 9 through the rack locking screw 6 .

Right leaf spring 8 is linked with handle 9 by spring leaf locking screw 4-2.

The connecting rod 12 is linked with the handle 9 by welding.

The elastic inner sleeve 13 is linked with the connecting rod 12 by welding.

The sliding locking sleeve 14 is linked with the mandrel 11 by welding.

The mandrel 11 and the sliding lock sleeve 14 are simultaneously loaded into the connecting rod 12 and the elastic inner sleeve 13 is slidably matched.

The trigger 3 is loaded into the handle 9 and connected in series with the mandrel 11 ; the trigger 3 is linked with the handle 9 through the link bolt 10 .

The mandrel 11 is linked with the trigger 3 through the pin 2-2.

Claims (5)

1. A surgical instrument for quickly positioning and fixing a bridge-connection combined type internal fixing system comprises a switch, a pin, a trigger, a spring piece locking screw, a rack locking screw, a spring piece, a handle, a connecting bolt, a mandrel, a connecting rod, an elastic inner sleeve, a sliding locking sleeve and a taper locking pin. The fixing device is characterized in that the relative movement of the mandrel and the outer sleeve is realized by pulling a trigger, so that the outer part of the inner sleeve is contracted to drive the taper pin to tighten the fixing block, and the locking and fixing of the fixing block and the connecting rod in the operation are realized. The installation time of the fixing block and the connecting rod in the operation is shortened. Improve doctor's operability, reduce operation aversion and screw locking inefficacy risk. The operation incision is small, and the doctor can conveniently perform the operation at the required position.

2. The surgical instrument for rapid positioning and fixing as claimed in claim 1, wherein the fixing block is inserted into the hole of the front end of the elastic inner sleeve, and the trigger is pulled to make the core shaft of the link trigger push the sliding locking sleeve to contract the elastic inner sleeve and the inner sleeve taper pin to tighten the fixing block, thereby achieving the locking and fixing of the fixing block and the connecting rod.

3. The surgical instrument for rapid positioning and fixing according to claims 1 and 2, characterized in that the trigger is pulled into the effective area of the rack, so that the rack releases the hand in a stressed state, and the rapid positioning fixer is left on the fixing block in a self-locking design structure.

4. A surgical instrument for rapid positioning and fixation according to claims 1 and 3, characterized by the design of the rack away from the trigger after actuation of the switch.

5. The surgical instrument for fast positioning and fixing according to claim 4, wherein the spring plate pulls back the trigger under an automatic force to drive the core shaft of the link trigger and the sliding locking sleeve of the link core shaft, so that the elastic inner sleeve and the taper pin at the inner side of the elastic inner sleeve fast release the design structure of the fixing block.

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