CN111407336A

CN111407336A - Minimally invasive fracture spreader

Info

Publication number: CN111407336A
Application number: CN202010259200.4A
Authority: CN
Inventors: 田康松
Original assignee: Central Hospital of Zibo
Current assignee: Central Hospital of Zibo
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-07-14

Abstract

The invention relates to the technical field of surgical instruments, in particular to a minimally invasive fracture spreader which comprises a telescopic connecting rod, wherein the top of the telescopic connecting rod is connected with a pressing piece, one side of the pressing piece is hinged with two spreading rods, the bottom of the telescopic connecting rod is connected with a guide sliding groove used for controlling the spreading direction of the spreading rods, the side walls of the spreading rods are provided with sliding rods capable of being inserted into the guide sliding groove and moving back and forth along the guide sliding groove, and one side of each spreading rod, which is back to the guide sliding groove, is provided with a bulge.

Description

Minimally invasive fracture spreader

Technical Field

The invention relates to the technical field of surgical instruments, in particular to a minimally invasive fracture spreader.

Background

In old fracture, the bone is often in a shortened displacement state, and for the situation, when a doctor performs reduction, steel nails are inserted into the bones at two ends of the fracture respectively, and then the steel nails are spread to perform reduction. In the prior art, fewer distractors are involved for old fracture, a doctor replaces the distractors with similar distractors such as a spine distractor and the like during operation, and the spine distractors have smaller distraction degree when an affected part is a thigh and other parts, so that the difficulty of the operation of the doctor is improved.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: overcomes the defects of the prior art, and provides the minimally invasive fracture spreader which is designed aiming at old fracture, has simple operation and increases the spreading degree.

The technical scheme adopted by the invention for solving the technical problem is as follows: minimally invasive fracture spreader, including telescopic connection rod, telescopic connection rod's top is connected with the pressing member, pressing member one side articulates there are two to prop open the pole, telescopic connection rod's bottom is connected with and is used for control prop open the pole and prop open the direction spout, it is provided with the slide bar that can insert the direction spout along direction spout round trip movement to prop open the pole lateral wall, prop open the pole dorsad the one side of direction spout is provided with the arch.

When the minimally invasive fracture spreader is used, after steel nails are respectively arranged on bones at two sides of a fracture part, the minimally invasive fracture spreader is arranged between the two steel nails, the telescopic connecting rod is held by a hand to press the pressing piece so as to shorten the telescopic connecting rod, the bulge is abutted against the steel nails, the bottoms of the two spreading rods are relatively spread outwards along the guide sliding groove, and the steel nails move backwards so as to spread and reset the fractured bones. The one side of protruding setting at the opening rod guide chute dorsad, the doctor can be more clearly observed when using, reduces the visual field that the operation degree of difficulty and whole device produced when using and hinders.

The telescopic connecting rod comprises a telescopic outer tube and a telescopic inner rod, the top of the telescopic inner rod is fixedly connected with the pressing piece, the bottom of the telescopic outer tube is fixedly connected with the outer wall of the guide chute groove, a spring is arranged around the telescopic inner rod, one end of the spring is fixedly connected with the pressing piece, and the other end of the spring is fixedly connected with the top of the telescopic outer tube.

The height of the spring in a natural state is equal to the maximum length of the telescopic inner rod when the telescopic outer pipe extends out. The spring is arranged, so that a doctor generates certain rebound force when pressing the pressing piece, a certain buffering effect can be achieved when the pressing piece is unfolded, and the doctor is prevented from exerting too much force when unfolding.

The pressing piece with one side that the pole is relative is propped open to articulate has the hook lever, the hook lever bottom is provided with the barb, flexible outer tube outer wall corresponds the hook lever and is provided with the rack, the rack tooth on the rack is the circular-arc of indent, the concave surface orientation of rack tooth the direction spout. When pressing the pressing member, the pin rod descends along with telescopic link, and the pressing member is articulated with the pin rod, when strutting to the settlement degree, pushes the barb to the rack, when loosening the pressing member, and the spring of compressed is bounce-back, thereby the barb catches on the rack tooth that corresponds and prevents the spring bounce-back to maintain the degree of strutting relatively fixed. The rack tooth is arc-shaped, the barb can be hooked more firmly when upwards, and the barb can not move downwards to produce the hindrance when downwards.

The pipe wall of the telescopic outer pipe is symmetrically provided with fixed hook parts about the central axis of the telescopic outer pipe. When the doctor uses, the forefinger and the middle finger of same hand hook the fixed piece that colludes respectively, and the thumb presses the pressing piece, and the palm pastes to the hook rod, and when strutting to a certain extent, the palm promotes the hook rod and makes the strip tooth that corresponds catch on the hook rod and avoid the hook rod to remove to realize singlehanded use operation, easy operation is convenient.

The protrusion is cylindrical, and the middle of the side surface of the protrusion is sunken towards the central axis of the protrusion. When the steel nail is propped open by the protrusion, the steel nail can be arranged at the concave part of the protrusion, so that the relative stability of the steel nail in the propping process is maintained, and the steel nail is prevented from sliding off.

Compared with the prior art, the invention has the following beneficial effects:

the minimally invasive fracture spreader provided by the invention has the advantages that the tops of the spreading rods are hinged with the pressing piece, when the pressing piece is pressed, the two spreading rods move back to spread, the spreading range is larger, the operation is simple, the design is reasonable, only the protrusions for abutting against steel nails are arranged at the bottoms of the spreading rods, the structure is simple, the visual field of a doctor cannot be blocked more, the operation difficulty is reduced, and the use convenience is improved.

Drawings

Fig. 1 is a schematic perspective view of the present invention when closed.

Fig. 2 is a partially enlarged view of a in fig. 1.

Fig. 3 is a schematic perspective view of the present invention when expanded.

In the figure: 1. a telescopic connecting rod; 101. a telescopic outer tube; 102. a telescopic inner rod; 2. a pressing member; 3. an opening lever; 4. a guide chute; 5. a slide bar; 6. a protrusion; 7. a spring; 8. a hook rod; 9. a barb; 10. a rack; 11. rack teeth; 12. and fixing the hook.

Detailed Description

Embodiments of the invention are further described below with reference to the accompanying drawings:

examples

As shown in fig. 1 to 3, the minimally invasive fracture spreader comprises a telescopic connecting rod 1, a pressing part 2 is connected to the top of the telescopic connecting rod 1, two spreading rods 3 are hinged to one side of the pressing part 2, a guide chute 4 for controlling the spreading direction of the spreading rods 3 is connected to the bottom of the telescopic connecting rod 1, a sliding rod 5 capable of being inserted into the guide chute 4 and moving back and forth along the guide chute 4 is arranged on the side wall of each spreading rod 3, and a protrusion 6 is arranged on one side of each spreading rod 3, which is opposite to the guide chute 4.

The telescopic connecting rod 1 comprises a telescopic outer tube 101 and a telescopic inner rod 102, the top of the telescopic inner rod 102 is fixedly connected with the pressing piece 2, the bottom of the telescopic outer tube 101 is fixedly connected with the outer wall of a guide chute 4 groove, a spring 7 is arranged around the telescopic inner rod 102, one end of the spring 7 is fixedly connected with the pressing piece 2, and the other end of the spring 7 is fixedly connected with the top of the telescopic outer tube 101. The height of the spring 7 in its natural state is equal to the maximum length of the telescopic inner rod 102 when it extends out of the telescopic outer tube 101. The spring 7 is arranged, so that a doctor can generate certain rebound force when pressing the pressing piece 2, a certain buffering effect can be realized during distraction, and the doctor is prevented from exerting too much force during distraction.

One side that according to 2 and prop open 3 relative is articulated to have a hook rod 8, and hook rod 8 bottom is provided with barb 9, and flexible outer tube 101 outer wall corresponds hook rod 8 and is provided with rack 10, and the latch 11 on the rack 10 is the circular-arc of indent, and the concave surface of latch 11 is towards guide chute 4. When pressing member 2, hook rod 8 descends along with telescopic link 1, and pressing member 2 is articulated with hook rod 8, when strutting to the settlement degree, pushes barb 9 towards rack 10, when loosening pressing member 2, and compressed spring 7 rebounds, and thereby barb 9 catches on corresponding rack 10 and prevents spring 7 to rebound to it is relatively fixed to maintain the degree of strutting. The rack teeth 11 are in the shape of an inward concave arc, so that the barb 9 can be hooked more firmly when facing upwards, and the barb 9 cannot be hindered from moving downwards when facing downwards.

The pipe wall of the telescopic outer pipe 101 is symmetrically provided with fixed hook parts 12 about the central axis of the telescopic outer pipe 101. When the doctor is using, the forefinger and the middle finger of same hand hook respectively fixed hook 12, and the thumb presses down pressing piece 2, and the palm pastes to hook rod 8, when strutting to a certain extent, and the palm promotes hook rod 8 and makes corresponding rack tooth 10 catch on hook rod 8 and avoid hook rod 8 to remove to realize the one-hand operation, easy operation is convenient.

The bulge 6 is cylindrical, and the middle part of the side surface of the bulge 6 is sunken towards the central axis of the bulge 6. When the steel nail is propped open by the protrusion 6, the steel nail can be arranged at the concave part of the protrusion 6, so that the relative stability of the steel nail in the propping process is maintained, and the steel nail is prevented from sliding off.

Claims

1. The minimally invasive fracture spreader is characterized by comprising a telescopic connecting rod (1), wherein the top of the telescopic connecting rod (1) is connected with a pressing piece (2), one side of the pressing piece (2) is hinged with two spreading rods (3), the bottom of the telescopic connecting rod (1) is connected with a guide sliding groove (4) used for controlling the spreading rods (3) to spread the direction, a sliding rod (5) capable of being inserted into the guide sliding groove (4) to move back and forth along the guide sliding groove (4) is arranged on the side wall of the spreading rod (3), and a bulge (6) is arranged on one side of the guide sliding groove (4).

2. The minimally invasive fracture spreader according to claim 1, wherein the telescopic connecting rod (1) comprises a telescopic outer tube (101) and a telescopic inner tube (102), the top of the telescopic inner tube (102) is fixedly connected with the pressing piece (2), the bottom of the telescopic outer tube (101) is fixedly connected with the outer wall of the guide chute (4), a spring (7) is arranged around the telescopic inner tube (102), one end of the spring (7) is fixedly connected with the pressing piece (2), and the other end of the spring (7) is fixedly connected with the top of the telescopic outer tube (101).

3. The minimally invasive fracture distractor according to claim 2, wherein the spring (7) has a height in its natural state equal to the maximum length of the inner telescopic rod (102) when it extends out of the outer telescopic tube (101).

4. The minimally invasive fracture spreader according to claim 3, wherein a hook rod (8) is hinged to one side of the pressing piece (2) opposite to the spreading rod (3), a barb (9) is arranged at the bottom of the hook rod (8), a rack (10) is arranged on the outer wall of the telescopic outer tube (101) corresponding to the hook rod (8), a rack (11) on the rack (10) is in the shape of an inwards concave arc, and the concave surface of the rack (11) faces the guide chute (4).

5. The minimally invasive fracture spreader according to claim 2, wherein the wall of the telescopic outer tube (101) is symmetrically provided with fixing hooks (12) about the central axis of the telescopic outer tube (101).

6. The minimally invasive fracture spreader according to claim 3, wherein the protrusion (6) is cylindrical, and the middle of the side surface of the protrusion (6) is concave towards the central axis of the protrusion (6).