CN112957118B - Nail placing guider - Google Patents

Abstract

The invention provides a nail placing guider which comprises a guiding pipe, an eccentric component and a tip end, wherein the guiding pipe comprises a head end and a tail end, the head end is used for placing an anchor, and the tail end is used for being held by an operator; the eccentric component is arranged close to the head end and extends outwards from the outer wall of the guide pipe in the radial direction; the tip is disposed at an extended end of the eccentric member extending outwardly and toward the head end. The nail-placing guide device of the invention can firmly position the guide device by arranging the eccentric component and the tip, the tip can be clamped between the acetabular bone and the labrum when the labrum repairing operation is positioned, the acetabulum cartilage is prevented from being damaged, and the integrity of a bone channel and the holding force of an anchor in the labrum repairing operation are ensured.

Description

A nail guide

technical field

The invention relates to a medical instrument used for labrum repair, in particular to a nail placement guide for labrum repair.

Background technique

Acetabular labrum injuries are one of the most common causes of hip pain. The prevalence of labral injury is high, with reports in the literature indicating a prevalence of labral injury ranging from 22% to 55% in the population presenting for hip pain.

The labrum plays a vital role in the stability, lubricity, and kinematics of the hip joint. Labral injury, tearing or surgical resection can result in loss of labral function, which may further lead to instability, subluxation, or dislocation of the hip. Therefore, restoration and maintenance of the normal labrum anatomy with labral repair is critical for pain relief, functional enhancement, and regaining mobility.

Currently, labral repair can be done with labral suture or reconstruction, but both involve labral fixation, which is fixed within the acetabular bone with several wire anchors. The necessary steps for placing the anchor are to drill the bone canal at the corresponding position of the acetabular rim using the guide, and then drive the anchor in. In clinical practice, the complex bony structure of the acetabulum increases the difficulty of drilling the bone canal, and often slips and penetrates, resulting in iatrogenic injury, and the firmness of the anchor cannot be guaranteed.

SUMMARY OF THE INVENTION

The invention provides a nail placement guide, comprising a guide tube, an eccentric part and a tip, the guide tube includes a head end and a tail end, the head end is used for placing an anchor, and the tail end is used for an operator to hold ; the eccentric part is arranged close to the head end and extends radially outward from the outer wall of the guide tube; the tip is arranged at the extending end of the eccentric part extending outward and faces the head end.

In one embodiment, the eccentric member includes a first side proximate the head end and a second side remote from the head end, the tip is connected to an extended end of the first side, the second side facing The head end is inclined.

In one embodiment, the eccentric member extends 3.5 mm radially outward from the outer wall of the guide tube.

In one embodiment, the tip includes a root portion connected to the extending end of the first side and a tip portion, the tip portion being connected to the root portion by a connecting surface along a distance away from The direction of the guide tube is inclined.

In one embodiment, the connection surface includes a first inclined surface and a second inclined surface, and a connection angle is formed between the first inclined surface and the second inclined surface, and the connection angle faces the guide tube.

In one embodiment, the connecting angle is an obtuse angle.

In one embodiment, the distance between the root and the tip is 1.5 mm.

In one embodiment, the tail end is provided with a handle, and the handle is used for the operator to hold.

In one embodiment, the guide tube is made of metal material.

In the nail placement guide of the present invention, by setting the eccentric part and the tip, the tip can be stuck between the acetabular bone and the labrum during the positioning of the labrum repair operation, so that the guide can be positioned firmly and the damage to the acetabular cartilage can be avoided. , to ensure the integrity of the bone tract and the holding force of the anchor in the labrum repair operation.

The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will become apparent by reference to the drawings and the following detailed description.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

1 is a schematic front view of the structure of a nail guide in an embodiment of the present invention;

Fig. 2 is the enlarged view of A part in Fig. 1;

FIG. 3 is a schematic diagram of the right side view of the nail placement guide according to an embodiment of the present invention; and

4A-4D are schematic diagrams of labral repair operations using a nail placement guide in one embodiment of the present invention.

Detailed ways

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

Referring to FIG. 1 , the staple guide 100 of the present invention, in one embodiment, includes a guide tube 1 , an eccentric member 2 and a tip 3 . Wherein, the guide tube 1 can be made of metal material, and includes a head end 11 and a tail end 12 . The cephalad end 11 is used for drilling the bony canal and placing anchors during labral repair operations, and the caudal end 12 can be held by the operator for manipulation. Preferably, the tail end 12 can be provided with a handle 13 so that the operator can hold it comfortably.

At the same time, the eccentric part 2 is disposed close to the head end 11, and the eccentric part 2 extends radially outward from the outer wall of the guide tube 1, so that the eccentric part 2 deviates from the axis of the guide tube 1 to achieve "eccentricity". Further, a tip 3 is provided at the outwardly extending extension end of the eccentric member 2 .

Referring to FIGS. 4A-4D in combination, FIG. 4A shows damage to the labrum 4 , the acetabular bone 5 and the acetabular cartilage 6 . Figure 4B shows the positioning of the labral repair operation. The operator can hold the handle 13 of the guide 100, orient the head end 12 towards the patient undergoing labral repair, use the acetabular rim as the positioning fulcrum, and clamp the tip 3 Between the acetabular bone 5 and the injured labrum 4 . Fig. 4C shows the bone tunnel 51 being drilled. The cooperation of the eccentric member 2 and the tip 3 can apply a clamping force to the acetabulum when drilling the bone tunnel 51, so as to firmly position the guide tube 1 and avoid the guide 100 from slipping. Posteriorly to penetrate the acetabular bone 5 or break into the iliopsoas fossa (not shown). In addition, due to the clamping force provided by the eccentric part 2 and the tip 3, the bone canal can be drilled and nailed stably, and the integrity of the bone canal and the holding force of the anchor can be ensured. In addition, the tip 3 extends in the direction of the head end 11 , for example, the tip 3 may extend in the direction of the head end and parallel to the axis of the guide tube 1 . In this way, the tip 3 can play a guiding role when drilling the bone canal, and also isolate the acetabular cartilage 6, so as to prevent the acetabular cartilage 6 from being penetrated when the nail is placed. FIG. 4D shows the sutured labrum 7 after suture with wire anchors by means of the guide 100 .

Referring to FIG. 2 , in one embodiment, the eccentric member 2 may include a first side 21 close to the head end 11 and a second side 22 away from the head end 11 . Therein, the tip 3 is connected to the extended end of the first side 21 . Further, the second side 22 is inclined toward the direction of the head end 11, thereby forming an inclined surface, so that when the guide is inserted and withdrawn, the inclined surface will not damage the nearby soft tissue, thereby reducing iatrogenic injury.

Preferably, according to the normal value of human acetabular cartilage, the distance H1 that the eccentric component 2 extends radially outward from the outer wall of the guide tube 1 can be designed to be 3.5 mm, so as to avoid damaging the articular cartilage during the drilling process of the bone canal . At the same time, the guide can be used to insert multiple anchors in multiple parts of the acetabulum, and the distances between the positions and the edge of the acetabulum are consistent, for example, 3.5mm, so that the distance between the suture anchor and the labrum is also consistent. , to increase the annular tension and sealing of the repaired labrum. Of course, this distance can be adjusted according to the thickness of the bone in different parts of the acetabulum.

In one embodiment, the tip 3 may include a root 31 and a tip 32 . Wherein, the root portion 31 is connected with the extending end of the first side 21 of the eccentric member 2 , and the tip portion 32 is connected with the root portion 31 through the connecting surface 33 . In addition, the connecting surface 33 is inclined along the direction away from the axis of the guide tube 1, so that by setting the inclined connecting surface 33, it is convenient to insert and fix the tip 3 of the guide tube between the acetabular bone and the labrum, and avoid damage to the labral junction.

Referring to FIG. 3 , in one embodiment, the connection surface 33 may include a first inclined surface 331 and a second inclined surface 332 . Wherein, a connection angle a is formed between the first inclined surface 331 and the second inclined surface 332 , and the connection angle a faces the guide tube 1 . In this way, by forming the connecting angle a, the holding force of the tip 3 is improved when drilling the bone canal. Preferably, the connection angle a can be an obtuse angle, and since the obtuse angle is not too sharp, the holding force of the tip 3 can be improved without damaging other tissues.

In one embodiment, according to the clinical minimum stapler for suturing the labrum of the acetabulum, the distance H2 between the root portion 31 and the tip portion 32 can be designed to be 1.5 mm, which ensures that the guide is fixed between the acetabular bone and the acetabular labrum. Between the labrum, and avoid damage to the labrum connection. Of course, this distance can be adjusted according to the thickness of the bone in different parts of the acetabulum.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (7)

1. A nail placement guide, characterized in that it comprises a guide tube, an eccentric part and a tip, the guide tube includes a head end and a tail end, the head end is used for inserting an anchor, and the tail end is used for The operator holds; the eccentric member is disposed close to the head end and extends radially outward from the outer wall of the guide tube; the tip is disposed at the outwardly extending extension end of the eccentric member and faces the head end; the tip is caught between the acetabular bone and the damaged labrum; the tip includes a root portion and a tip portion, the root portion is connected with the eccentric portion, the tip portion is connected with the root portion through a connecting surface, and the connecting surface is inclined along a direction away from the guide tube; the connecting surface includes a first inclined surface and a second inclined surface, a connecting angle is formed between the first inclined surface and the second inclined surface, and the connecting angle faces the guide pipe; The eccentric member extends 3.5 mm radially outward from the outer wall of the guide tube. 2. The staple guide of claim 1, wherein the eccentric member includes a first side proximate the head end and a second side remote from the head end, the tip and the first side are connected to the extended ends, and the second side is inclined toward the head end. 3. The staple guide of claim 2, wherein the root portion is connected to the extended end of the first side. 4. The nail setting guide according to claim 3, wherein the connecting angle is an obtuse angle. 5 . The nail placement guide of claim 4 , wherein the distance between the root portion and the tip portion is 1.5 mm. 6 . 6 . The nail setting guide according to claim 1 , wherein the rear end is provided with a handle, and the handle is used for the operator to hold. 7 . 7 . The nail placement guide according to claim 1 , wherein the guide tube is made of metal material. 8 .

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