CN209864025U

CN209864025U - PFNA main nail insertion sighting device for thighbone

Info

Publication number: CN209864025U
Application number: CN201920372870.XU
Authority: CN
Inventors: 曹治东; 李兴超; 何苗; 晁瑞; 姚海; 丁虹
Original assignee: Chongqing Fourth People's Hospital
Current assignee: Chongqing Fourth People's Hospital
Priority date: 2019-03-22
Filing date: 2019-03-22
Publication date: 2019-12-31
Anticipated expiration: 2029-03-22

Abstract

The utility model relates to the field of medical equipment, especially, relate to a sight is inserted with PFNA main nail to thighbone. The inserting sighting device for the main nail of the PFNA for the femur comprises an upper support, a lower support, a first locking nut and a sleeve, wherein the front end of the sleeve is provided with an extension cylinder, the extension cylinder is of a hollow structure, the outer wall of the extension cylinder is provided with an external thread, the upper support is provided with a first through hole in the horizontal direction, the inner wall of the first through hole is provided with an internal thread, and the sleeve is in threaded connection with the first through hole through the extension cylinder; the lower support is provided with a sliding groove, a movable block and a second locking nut, the sliding groove is symmetrically arranged on two sides of the lower support, two sides of the movable block are fixedly connected with screw rods respectively, and the movable block is connected with the sliding groove in a sliding mode through the screw rods. Compared with the prior art, the utility model, can ensure that PFNA owner nail inserts the assigned position, reduce the complexity of operation when performing the operation, supplementary doctor inserts PFNA owner nail in the femoral bone marrow intracavity, improves the success rate simultaneously, reduces the misery that patient receives.

Description

PFNA main nail insertion sighting device for thighbone

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a sight is inserted with PFNA main nail to thighbone.

Background

The intertrochanteric femoral fracture is a very common senile hip fracture in orthopedics clinic and can cause various complications, the most commonly used treatment scheme at present is minimally invasive reduction PFNA internal fixation, no adequate auxiliary equipment is available, even under X-ray positioning, the aim of achieving puncture fixation on fractured bones is very difficult, if the position is incorrect, PFNA is driven to be too close to the ventral side or the dorsal side, the smooth implantation of a PFNA intramedullary nail main nail and the correct position of a helical blade in a femoral neck are influenced, and for doctors with insufficient operation experience, the operation is a clinical problem, and if the puncture operation is inaccurate or inappropriate, unnecessary secondary injury and even catastrophic medical injury can be caused.

Disclosure of Invention

In view of the technical problem who exists among the prior art, the utility model provides a sight is inserted to main nail of PFNA for thighbone, at the in-process that the main nail of PFNA was implanted, the supplementary smooth nail of main nail of PFNA was followed closely, was avoided squeezing into the position skew.

In order to realize the technical purpose, the utility model discloses a technical scheme as follows: the PFNA main nail insertion sighting device for the femur comprises an upper support, a lower support, a first locking nut and a sleeve, wherein the tail end of the upper support is inserted and connected with the top end of the lower support and is fixed through the first locking nut, an extension cylinder is arranged at the front end of the sleeve and is of a hollow structure, external threads are arranged on the outer wall of the extension cylinder, a first through hole is formed in the upper support in the horizontal direction, internal threads are arranged on the inner wall of the first through hole, and the sleeve is in threaded connection with the first through hole through the extension cylinder; the lower support is provided with a sliding groove, a movable block and a second locking nut, the sliding groove is symmetrically arranged on two sides of the lower support, two sides of the movable block are fixedly connected with a screw rod respectively, the movable block is connected with the sliding groove in a sliding mode through the screw rod and is connected with the lower support in a locking mode through the second locking nut, and the movable block is provided with a second through hole in the vertical direction.

Adopt above-mentioned technical scheme's PFNA main nail for thighbone to insert the sight, be provided with upper bracket and the lower carriage of pegging graft, be applicable to the patient that fat thin degree is different, the position of second through-hole can be adjusted through the movable block simultaneously, has enlarged application scope, makes the accurate suitable of puncture operation, can not lead to unnecessary secondary damage.

Further defined, the first through hole is perpendicular to the second through hole.

Further defined, the diameter of the first through hole is 3.5 mm.

Further defined, the diameter of the second through hole is 5.5 mm.

The utility model discloses compare in prior art, be provided with the sleeve that can dismantle the connection on the upper bracket, can prolong the position of first through-hole through the sleeve, help the doctor insert PFNA owner nail, be equipped with adjustable movable block on the lower carriage simultaneously, follow first through-hole nail at PFNA owner and follow the back, the doctor of being convenient for gets the hole to the thighbone from the second through-hole, ensure that PFNA owner nail inserts the assigned position, the complexity of operation when having reduced the operation, supplementary doctor inserts PFNA owner nail in the thighbone marrow cavity, improve the success rate simultaneously, reduce the misery that patient receives.

Drawings

Fig. 1 is a schematic structural view of the femoral PFNA main nail insertion sighting device of the present invention;

fig. 2 is a left side view of the femoral PFNA main nail insertion sight of the present invention;

the corresponding labels in the figures are: 1-upper support, 2-lower support, 3-first locking nut, 4-sleeve, 11-first through hole, 21-sliding chute, 22-movable block, 23-second locking nut, 24-screw rod, 25-second through hole, 41-extension cylinder and 42-external thread.

Detailed Description

In order to make the technical solution of the present invention more comprehensible to those skilled in the art, the present invention is further described with reference to the accompanying drawings and examples.

The femoral PFNA main nail insertion sighting device shown in fig. 1 and 2 comprises an upper support 1, a lower support 2, a first locking nut 3 and a sleeve 4, wherein the tail end of the upper support 1 is inserted into the top end of the lower support 2 and is fixed through the first locking nut 3, the front end of the sleeve 4 is provided with an extension cylinder 41, the extension cylinder 41 is of a hollow structure, the outer wall of the extension cylinder is provided with an external thread 42, the upper support 1 is provided with a first through hole 11 in the horizontal direction, the inner wall of the first through hole 11 is provided with an internal thread, the sleeve 4 is in threaded connection with the first through hole 11 through the extension cylinder 41, the lower support 2 is provided with a sliding groove 21, a movable block 22 and a second locking nut 23, the sliding groove 21 is symmetrically arranged on two sides of the lower support 2, two sides of the movable block 22 are respectively and fixedly connected with a screw rod 24, the movable block 22 is in sliding connection with the sliding groove 21 through the screw rod 24 and is in locking connection with the lower support 2 through a second locking nut 23, wherein the movable block 22 is provided with a second through hole 25 in the vertical direction, the diameter of the second through hole 354 mm is 355.25 mm.

Before the utility model is used, the relative position between the lower bracket 2 and the upper bracket 1 and the position of the movable block 22 at the position of the femur of the patient are firstly adjusted according to the femur of the patient, and after the position of the second through hole 25 is determined, the first locking nut 3 and the second locking nut 23 are respectively screwed tightly to avoid the sliding between the upper bracket 1 and the lower bracket 2 and the sliding of the movable block 22 on the lower bracket; then, the positioning needle is driven into the medullary cavity of the patient from the second through hole 25, after the positioning needle is driven into the medullary cavity, the first through hole 11 is aligned with the end part of the femur, the guide needle penetrates into the medullary cavity of the femur along the tail end, the front end and the end part of the femur in sequence, as the second through hole 25 is vertically arranged on the movable block 22, the upper bracket 1 is inserted with the lower bracket 2, and the first through hole 11 is arranged in the horizontal direction, the guide needle can be driven into the medullary cavity of the femur of the patient in the horizontal direction with the assistance of the positioning needle and the upper bracket 1 until the guide needle penetrates to the positioning needle, the guide needle can be driven into the medullary cavity of the femur of the patient at one time without deviation, and the phenomenon that the patient suffers secondary injury is avoided; meanwhile, due to the difference between the skeletons and body types of patients, when some patients insert the guide pin from the tail end of the first through hole, the guide pin is difficult to smoothly go on due to the obstruction of epidermis or muscular tissues, in order to deal with the situation, when the guide pin is difficult to insert from the first through hole, the sleeve 4 can be in threaded connection with the first through hole 11, so that the length of the first through hole 11 is prolonged, and a doctor can conveniently insert the guide pin into the femoral stem cavity smoothly through the sleeve 4.

The PFNA main nail insertion sighting device provided by the present invention is introduced in detail, and the description of the specific embodiment is only used to help understanding the method and the core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The sight is inserted with PFNA main nail to thighbone, its characterized in that: the clamping device comprises an upper support, a lower support, a first locking nut and a sleeve, wherein the tail end of the upper support is spliced with the top end of the lower support and is fixed through the first locking nut, an extension cylinder is arranged at the front end of the sleeve and is of a hollow structure, external threads are arranged on the outer wall of the extension cylinder, a first through hole is formed in the upper support in the horizontal direction, internal threads are arranged on the inner wall of the first through hole, and the sleeve is in threaded connection with the first through hole through the extension cylinder; the lower support is provided with a sliding groove, a movable block and a second locking nut, the sliding groove is symmetrically arranged on two sides of the lower support, two sides of the movable block are fixedly connected with a screw rod respectively, the movable block is connected with the sliding groove in a sliding mode through the screw rod and is connected with the lower support in a locking mode through the second locking nut, and the movable block is provided with a second through hole in the vertical direction.

2. The femoral PFNA master pin insertion aimer of claim 1, wherein: the first through hole is perpendicular to the second through hole.

3. The femoral PFNA master nail insertion aimer of claim 1, wherein the first through hole has an inner diameter of 3.4 ~ 4 mm.

4. The femoral PFNA master pin insertion aimer of claim 1, wherein: the diameter of the second through hole is 5.5 mm.