CN216675888U

CN216675888U - Cut-embedded type residual bone nail extractor

Info

Publication number: CN216675888U
Application number: CN202123046032.XU
Authority: CN
Inventors: 朱宏刚
Original assignee: Fuxin Mine General Hospital Of Liaoning Health Industry Group
Current assignee: Fuxin Mine General Hospital Of Liaoning Health Industry Group
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-06-07
Anticipated expiration: 2031-12-06

Abstract

The utility model relates to a cutting-embedding type residual bone nail extractor which comprises a rod-shaped component, wherein the upper end part of the rod-shaped component is connected with a handle, the lower end of the rod-shaped component is provided with a cutting type broken nail clamping piece, the cutting type broken nail clamping piece is a columnar component, the lower end part of the cutting type broken nail clamping piece is provided with a blind hole larger than the outer diameter of an orthopedic screw, and the lower end of the blind hole is provided with sawteeth; the inner wall of the blind hole is integrally provided with a plurality of uniformly distributed triangular cutting edges along the circumferential direction. The utility model provides an innovative tool designed for taking out residual screws in bones more safely, effectively and quickly. The bone fracture internal fixation screw is suitable for residual in a screw bone caused by broken screw due to non-healing after fracture internal fixation, residual in the screw bone caused by difficulty in taking out the screw during internal fixation after bone healing, or residual bone caused by fracture of an implanted screw in the orthopedics department due to any other reasons.

Description

Cut-embedded type residual bone nail extractor

Technical Field

The utility model belongs to the technical field of orthopedic medical treatment, and particularly relates to a cutting-embedding type residual bone nail extractor.

Background

In the technical field of orthopedic medical treatment, steel plate screw internal fixation is a common internal fixation mode for limb fracture. After the fracture is healed, the steel plate and the screw are not suitable to be kept in the body for a long time as foreign matters and should be taken out. Because the internal fixation object can bear stress after being placed in the body, the time after physical workers or internal fixation is too long, the stress borne by the screw is obviously increased, and the difficulty in taking out the screw is increased. Even more difficulty arises because some surgeons use hard force to screw off when encountering difficult screws. Some doctors have irregular operation techniques when the internal fixation is placed, improper drill bits are used for drilling holes, tapping is not carried out in advance through a screw tap, or tapping on the lateral cortical bone is not in place during tapping, the screw is directly screwed into the bone screw with strong force, and particularly when a cortical bone screw is screwed into the bone screw, the screw cap and the screw main body can be broken; the compression nail is improperly placed, the tail of the screw nail is deformed and broken due to the fact that the position of the compression nail is too close to the steel plate and then the compression nail is screwed in by force, and the screw nail is difficult to take out.

Furthermore, there are often times when staples occur, when the operation is forced to be interrupted, and the entire fracture fixation process has to be started again from the beginning.

As an orthopedic broken nail extractor or device, there are also disclosed in the prior art various structures, for example, a sleeve type broken nail extractor, publication No. CN204219022U, particularly a sleeve type broken nail extractor which facilitates the extraction of a broken nail from a patient's body. The extractor comprises a handle and an extraction rod, wherein the handle is arranged at the top of the extraction rod, the bottom of the extraction rod is provided with an extraction head capable of clamping broken nails, the extraction head is a hole with internal threads on the inner wall, the extraction head is also provided with an opening, a wedge block is placed in the opening, a locking nut is arranged above the opening, the locking nut is connected with the extraction head through threads arranged on the outer wall of the extraction head, the locking nut is matched with the wedge block for use, and the wedge block is pressed by rotating the screwing nut to enable the wedge block to clamp the broken nails, so that the broken nails are extracted; because the cross section of the broken nail often exists in the bone, the broken nail extractor adopting the structure can not clamp the broken nail and is only suitable for the condition that the broken nail leaks out of the outer surface of the bone and has a certain distance; according to clinical research, when the bone is exposed during taking out, the connection part of the bone and the screw needs to be chiseled by other tools, and the broken screw can be taken out only by the exposed screw.

For another example, the utility model discloses a novel broken screw taking device, which is disclosed by the prior art and has the publication number of CN 111467025A; the technical scheme is that the nail taking device comprises a nail taking pipe and a locking pipe in threaded connection with the outer side wall of the nail taking pipe, a plurality of contraction clamping jaws are arranged on one end face of the nail taking pipe at equal intervals along the circumferential direction of the nail taking pipe, the thickness of each contraction clamping jaw gradually increases outwards along the length direction of the nail taking pipe and is arranged in a horn shape, one side, close to the nail taking pipe, of the outer side wall of each contraction clamping jaw is completely attached to the outer side wall of the nail taking pipe, a contraction gap is formed between any two adjacent contraction clamping jaws, a containing cavity for containing broken nails is formed by surrounding the contraction clamping jaws, a curved surface is arranged on the inner side wall, contacting with a screw, a nail taking handle is arranged at one end, far away from the contraction clamping jaws, of the nail taking pipe, the contraction clamping jaws gradually contract towards the direction of the contraction clamping jaws in the rotating movement process until the broken nails are clamped, the nail taking device is convenient to operate and can firmly clamp the screw, the screw is suitable for screws with any specification. The prior art also has the condition that the section which can not be taken out of the broken nail is always in the bone.

Therefore, the utility model relates to a cutting-embedding type residual bone screw extractor which is designed to extract residual bone screws more safely, effectively and quickly.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides the cutting-embedding type residual bone nail extractor which has the advantages of simple structure, wide application range, automatic alignment function and firm clamping, and is easy to operate.

The utility model is realized in this way, a cut-embedded residual nail extractor in bone, including the rod-like part, the upper end of the said rod-like part connects with the hand grip, the bottom end of the rod-like part has cutting type to cut the clamping piece of the nail, characterized by that, the said cutting type cuts the clamping piece of the nail and is a columnar component, its bottom end has blind holes greater than the external diameter of the orthopedics screw, the bottom end of the blind hole has 6-8 sawtooth; the inner wall of the blind hole is integrally provided with a plurality of uniformly distributed triangular cutting edges along the circumferential direction.

Preferably, the blind hole is larger than the diameter of the screw to be taken by 1 mm.

Preferably, the number of the triangular cutting edges is 6-8, and the length of the triangular cutting edges is 3-5 mm.

Preferably, the cutting edge is of a conical structure and inclines towards the center direction of the cutting type broken nail clamping piece from the cutting type broken nail clamping piece.

Preferably, the number of the cutting edges is 8; it is 0-1mm in height and extends 5mm upwards.

Preferably, the upper end of the blind hole is provided with a bone fragment discharging port communicated with the blind hole.

The utility model has the advantages and technical effects that: by adopting the technical scheme, the utility model is easy to accurately position, has small damage to the machine body in the taking-out process, and ensures that the taking-out processes of broken nails and sliding nails are convenient and quick, and time and labor are saved; does not damage the cortex of opposite side, reduces the risk of recrudescence and can greatly reduce the pain of patients and the expense of medical expenses.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a cutting staple retainer;

fig. 3 is a schematic cross-sectional structure of a triangular cutting edge.

In the figure, 1, a rod-shaped part; 2. a handle; 3. a cutting type broken nail clamping piece; 3-1, blind holes; 3-2, saw teeth; 3-3, a cutting edge; 3-4, bone fragment excreting mouth.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Referring to fig. 1 to 3, the cutting-embedding type residual nail extractor in bone comprises a rod-shaped part 1, wherein the upper end part of the rod-shaped part is connected with a handle 2 for applying rotary torsion and pulling force, the handle is designed to be of a T-shaped structure, the lower end of the rod-shaped part is provided with a cutting type broken nail clamping piece 3 for cutting peripheral bone substances of the broken nail while taking out the broken nail and clamping the broken nail, the cutting type broken nail clamping piece is a columnar member, the lower end part of the cutting type broken nail clamping piece is provided with a blind hole 3-1 larger than the outer diameter of an orthopedic screw, and the blind hole has the function of containing bone fragments and the function of containing the broken nail; the lower end of the blind hole is provided with 6-8 sawteeth 3-2; a plurality of uniformly distributed triangular cutting edges 3-3 are integrally arranged on the inner wall of the blind hole along the circumferential direction; for gripping or biting the outer surface of the screw.

Preferably, the cutting edge is of a conical structure and inclines towards the center direction of the cutting type broken nail clamping piece from the cutting type broken nail clamping piece. The cutting type broken nail clamping piece inclines towards the center direction of the cutting type broken nail clamping piece, and the conical structure has the function of automatic alignment, so that the cutting type broken nail clamping piece and the broken nail are concentric, the residual nail extractor in the cutting and embedding type bone is prevented from inclining relative to the broken nail, and the resistance of pulling out the broken nail is increased.

Preferably, the upper end of the blind hole is provided with a bone fragment discharging port 3-4 communicated with the bone fragment containing cavity. When more bone fragments can not be accommodated, the bone fragments can be discharged outside through the bone fragment discharge opening, and then the cutting and embedding type residual bone nail extractor continues to perform downward cutting operation.

When the residual nail is taken out, the residual end of the residual nail is only needed to be aligned and sleeved, the residual nail is lightly hammered and driven in accordance with the direction of the residual nail, so that the cutting edge in the blind hole is embedded into the residual end of the screw, and the screw is screwed out in the direction that the screw exits the thread. The residual nail in the double-layer cortical bone can be removed from the cortical bone around the residual nail on the side close to the operator by the saw teeth at the front end of the extractor, and then the steps are executed. 1. By adopting the technical scheme, as long as find the incomplete end of the screw entangle and beat gently according to the longitudinal axis direction of the incomplete nail, the end of the screw taking device and the incomplete nail close to the operation person is embedded tightly and can be taken out, the screw can be taken out without completely exposing the incomplete end of the screw in the design, namely the incomplete nail is taken out by the blind person, and particularly, the incomplete nail which does not have cortical bone on the side close to the operation person and can not be exposed in the cancellous bone is taken out with high success rate, for example, the incomplete nail in the vertebral body. 2. The damage to the body is small in the taking-out process, so that the broken nail taking-out process is safe, convenient and quick, the cortex of the contralateral side is not damaged, the risk of re-fracture is reduced, and the pain of a patient and the expenditure of medical expenses can be greatly reduced. 3. The rod-shaped component of the design tool is a disposable component and does not suggest repeated use.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A cutting-embedding type residual nail extractor in bones comprises a rod-shaped part, wherein the upper end part of the rod-shaped part is connected with a handle, and the lower end of the rod-shaped part is provided with a cutting type broken nail clamping piece; the inner wall of the blind hole is integrally provided with a plurality of uniformly distributed triangular cutting edges along the circumferential direction.

2. The cut and embedded intraosseous residual nail extractor according to claim 1, wherein: the blind hole is larger than the diameter of the screw to be taken by 1 mm.

3. A cut-and-embedded intraosseous residual nail extractor as claimed in claim 1, wherein: the number of the triangular cutting edges is 6-8, and the length position of the triangular cutting edges is 3-5 mm.

4. The cut and embedded intraosseous residual nail extractor according to claim 1, wherein: the cutting edge is of a conical structure and inclines from the cutting type broken nail clamping piece to the center direction of the cutting type broken nail clamping piece.

5. The cut and embedded intraosseous residual nail extractor according to claim 1, wherein: the number of the cutting edges is 8; it is 0-1mm in height and extends 5mm upwards.

6. The cut and embedded intraosseous residual nail extractor according to claim 1, wherein: and the upper end of the blind hole is provided with a bone fragment excretion hole communicated with the blind hole.