CN219306836U

CN219306836U - Auxiliary device for implanting sacroiliac screw

Info

Publication number: CN219306836U
Application number: CN202320327456.3U
Authority: CN
Inventors: 房冰
Original assignee: Qingdao Binhai University Affiliated Hospital
Current assignee: Qingdao Binhai University Affiliated Hospital
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-07-07
Anticipated expiration: 2033-02-27

Abstract

The utility model aims to disclose a sacroiliac screw implantation auxiliary device, which comprises a puncture channel, a guide cone and a guide needle; the puncture channel comprises a first handle part and a puncture part, the puncture part is of a hollow structure, the hollow structure is a conical cavity, the puncture part comprises a proximal end and a distal end, the distal end is of a pointed structure, and the inner diameter of the distal end is smaller than that of the proximal end; the guide cone comprises a second handle part and a perforated part, the perforated part is conical, the perforated part comprises a tail part and a head part, and the head part is in a curette shape; the external diameter of head is less than the internal diameter of distal end, and technical effect: through the puncture passageway that the internal diameter gradually decreases, the internal diameter of distal end is less than the internal diameter of proximal end to and the guide cone that the external diameter gradually decreases, and the head of guide cone adopts the curet shape, makes the guide cone have bigger drilling direction adjustment space in the puncture passageway, and the flexibility increases, and in addition, the guide cone head of curet shape makes the probability that guide cone damaged blood vessel or nerve in the pelvic cavity reduce.

Description

Auxiliary device for implanting sacroiliac screw

Technical Field

The utility model relates to the technical field of sacroiliac fixation, in particular to an auxiliary device for implanting sacroiliac screws.

Background

Pelvic fractures, which are fractures with high energy injury, are not uncommon clinically. In recent years, the minimally invasive treatment of pelvic fracture is a popular field, wherein the minimally invasive operation of sacroiliac has been applied clinically, mainly by treating dislocation of sacroiliac joint, sacral fracture, fracture of ilium around sacroiliac joint, etc. through sacroiliac screw, and has the advantages of minimally invasive, effective fixation and biomechanical compliance.

The sacroiliac joint is composed of an auricular surface of ilium and an auricular surface of sacrum, and the minimally invasive operation of the sacroiliac also has a certain risk, particularly because of higher incidence rate of vascular and nerve injuries in the pelvis, high technical requirements and longer ray exposure time during operation. At present, the minimally invasive operation of the sacroiliac is carried out by knocking in a guide needle through an electric drill or a hammer, and then fixing a screw, so that the risk is high, and the damage to blood vessels or nerves in the pelvic cavity is easy to cause; some are fixed screws through robot navigation, but the price is high, and the screws are not popular; some auxiliary devices are implanted by adopting sacroiliac screws, the auxiliary devices are pre-drilled through the shape of a guide cone, and the guide cone is a pointed part in the pre-drilling process, so that the defect of damaging blood vessels or nerves is easy to occur; on the other hand, the direction fine tuning of the guide cone is difficult, and the accuracy of the drilling direction is affected.

In view of the above, there is a need for an improved sacroiliac screw implantation aid in the art that addresses the above-described problems.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to disclose a sacroiliac screw implantation auxiliary device, which is characterized in that a puncture channel with gradually decreasing inner diameter and a guide cone with gradually decreasing outer diameter are adopted, the head of the guide cone is in a curet shape, so that the guide cone has larger drilling direction adjustment space in the puncture channel, the flexibility is increased, and in addition, the probability of damaging a blood vessel or a nerve in a pelvic cavity by the guide cone head in the curet shape is reduced.

In order to achieve the above-mentioned aim, the present utility model provides a sacroiliac screw implantation assisting apparatus, comprising a puncture channel, a guide cone and a guide needle;

the puncture channel comprises a first handle part and a puncture part, the puncture part is of a hollow structure, the hollow structure is a conical cavity, the puncture part comprises a proximal end and a distal end, the distal end is of a pointed structure, and the inner diameter of the distal end is smaller than that of the proximal end;

the guide cone comprises a second handle part and a perforated part, the perforated part is conical, the perforated part comprises a tail part and a head part, and the head part is in a curette shape;

the head portion has an outer diameter less than an inner diameter of the distal end and the tail portion has an outer diameter less than an inner diameter of the proximal end.

Preferably, the first handle portion is provided with a recess, the second handle portion being T-shaped, the recess being capable of receiving the second handle portion in its entirety.

Preferably, the prong structure is provided with a bevel.

Preferably, the head is provided with an arcuate blade.

Preferably, the outer diameter of the guide pin is no greater than the inner diameter of the distal end.

Preferably, the outer diameter of the guide pin is 2mm-2.5mm.

Preferably, the length of the guide pin is 25cm-35cm.

Preferably, the probe is further comprised, the head of which is provided with a small ball, the outer diameter of which is smaller than the inner diameter of the distal end.

Preferably, the distal end has an inner diameter of 3mm and the proximal end has an inner diameter of 4mm.

Preferably, a bending angle is formed between the head and the body of the guide cone.

Compared with the prior art, the utility model has the following technical effects:

through the puncture passageway that the internal diameter gradually decreases, the internal diameter of distal end is less than the internal diameter of proximal end to and the guide cone that the external diameter gradually decreases, and the head of guide cone adopts the curet shape, makes the guide cone have bigger drilling direction adjustment space in the puncture passageway, and the flexibility increases, and in addition, the guide cone head of curet shape makes the probability that guide cone damaged blood vessel or nerve in the pelvic cavity reduce.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 (a) is a schematic view of a guide pin of the present utility model.

FIG. 1 (b) is a schematic diagram of a probe according to the present utility model.

FIG. 1 (c) is a schematic view of a puncture channel according to the present utility model.

FIG. 1 (d) is a schematic view of the guide cone of the present utility model.

FIG. 2 is a schematic view of the mating of the puncture channel and guide cone of the present utility model.

Fig. 3 is a schematic view of the nose portion of the guide cone of the present utility model.

Fig. 4 (a) to 4 (e) are schematic views illustrating operation steps of the auxiliary device of the present utility model.

Wherein, 1, puncture the channel; 11. a first handle portion; 111. a groove; 12. a puncture part; 121. a proximal end; 122. a distal end; 2. a guide cone; 21. a second handle portion; 22. a perforated portion; 221. tail part; 222. a head; 23. a body; 3. a guide pin; 4. a probe; 41. a pellet; 5. and (5) a screw.

Detailed Description

The present utility model will be described in detail below with reference to the embodiments shown in the drawings, but it should be understood that the embodiments are not limited to the present utility model, and functional, method, or structural equivalents and alternatives according to the embodiments are within the scope of protection of the present utility model by those skilled in the art.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1

Referring to fig. 1 to 4, this embodiment discloses a specific embodiment of a sacroiliac screw implantation aid (hereinafter referred to as "aid").

The sacroiliac screw implantation auxiliary device, as shown in fig. 1 to 4, comprises a puncture channel 1, a guide cone 2 and a guide needle 3; the puncture channel 1 comprises a first handle part 11 and a puncture part 12, the puncture part 12 is of a hollow structure, the hollow structure is a conical cavity, the puncture part 12 comprises a proximal end 121 and a distal end 122, the distal end 122 is of a pointed structure, and the inner diameter of the distal end 122 is smaller than the inner diameter of the proximal end 121; the guide cone 2 comprises a second handle part 21 and a perforated part 22, the perforated part 22 is conical, the perforated part 22 comprises a tail part 221 and a head part 222, and the head part 222 is in a curette shape; the head 222 has an outer diameter that is less than the inner diameter of the distal end 122 and the tail 221 has an outer diameter that is less than the inner diameter of the proximal end 121.

Specifically, in order to reduce the damage of the guide cone 2 to the pelvic vessel or the nerve and facilitate the fine adjustment of the guide cone 2 in the pre-drilling process, the hollow structure of the puncture channel 1 is designed into a conical cavity, i.e. the inner diameter of the puncture channel 1 gradually decreases from the proximal end 121 to the distal end 122, i.e. the inner diameter of the distal end 122 is smaller than the inner diameter of the proximal end 121; in addition, the outer diameter from the tail 221 to the head 222 of the guide cone 2 gradually decreases, the outer diameter of the head 222 is smaller than the inner diameter of the distal end 122, and the outer diameter of the tail 221 is smaller than the inner diameter of the proximal end 121, when the punching direction of the guide cone 2 needs to be adjusted, after the guide cone 2 exits from a small part, a certain space is reserved for adjusting the pre-punching direction of the guide cone, so that fine adjustment is facilitated, and the pre-punching precision is improved. The head 222 is in a curette shape, and compared with the conventional pointed guide cone, the head 222 is provided with an arc-shaped blade part, and the arc-shaped blade part is used for pre-drilling, so that the damage of the arc-shaped blade part to blood vessels or nerves is greatly reduced. The head 222 and the body 23 of the guide cone 2 have a bending angle therebetween, wherein the bending angle is an obtuse angle close to 180 degrees, and the fine adjustment of the drilling direction of the guide cone 2 is facilitated when the guide cone 2 is rotated.

In order to facilitate the cooperation of the guide cone 2 and the puncture channel 1, the guide cone 2 is pre-drilled through the hollow structure of the puncture channel 1; the first handle part 11 is provided with a groove 111, the second handle part 21 is of a T shape, the groove 111 can fully accommodate the second handle part 21, namely, when the guide cone 2 is deeply drilled, the second handle part 21 can be deep into the groove 111, and the tip structure of the puncture channel 1 is provided with an inclined plane which is helpful for puncture.

As a preferred embodiment, the inner diameter of the distal end is 3mm, the inner diameter of the proximal end is 4mm, the outer diameter of the guide needle 3 is not larger than the inner diameter of the distal end 122, the outer diameter of the guide needle 3 is 2mm-2.5mm, and the length of the guide needle is 25cm-35cm; the auxiliary device further comprises a probe 4, the head of said probe 4 being provided with a small ball 41, the outer diameter of said small ball 41 being smaller than the inner diameter of said distal end 122.

Referring to fig. 4, the operation steps of the auxiliary device will be described below, (1) referring to fig. 4 (a), the puncture channel 1 is penetrated into the muscle in a predetermined direction, the guide cone 2 is inserted into the hollow structure of the puncture channel 1 to perform pre-drilling, and in the drilling process, the hardness can be detected by the probe 4 and the ball 41 thereof to judge whether the muscle or the bone is extracted, and the guide cone 2 is pre-drilled after the judgment is clear; (2) Referring to fig. 4 (b), the drilling direction of the guide cone 2 is finely adjusted, so that the guide cone 2 is accurately drilled, and the head 222 of the guide cone 2 can be changed in direction by combining a small amount of extraction of the guide cone 2 and/or rotating the guide cone 2 during fine adjustment; (3) Referring to fig. 4 (c), after the pre-drilling is completed, the guide cone 2 is pulled out; (4) Referring to fig. 4 (d), the guide pin 3 is inserted into the hollow structure of the puncture channel 1 and the puncture channel 1 is withdrawn; (5) Referring to fig. 4 (e), the screw 5 with a hollow structure is screwed into the pre-drilled hole along the guide pin 3 to fix the sacroiliac, and through the steps, the minimally invasive fixation of the sacroiliac is realized, so that the operation flow can be simplified, the operation time can be reduced, the radiation exposure can be reduced, and the implantation of the sacroiliac screw is safe, effective and convenient.

Claims

1. The auxiliary device for implanting the sacroiliac screw is characterized by comprising a puncture channel, a guide cone and a guide needle;

2. The sacroiliac screw implantation aid of claim 1, wherein the first handle portion is provided with a recess, the second handle portion being T-shaped, the recess being capable of fully receiving the second handle portion.

3. The sacroiliac screw implantation aid of claim 1, wherein the pointed structure is provided with a chamfer.

4. The sacroiliac screw implantation aid of claim 1, wherein the head is provided with an arcuate blade.

5. The sacroiliac screw implantation aid of any one of claims 1-4, wherein an outer diameter of the lead is no greater than an inner diameter of the distal end.

6. The sacroiliac screw implantation aid of claim 5, wherein the guide pin has an outer diameter of 2mm to 2.5mm.

7. The sacroiliac screw implantation aid of claim 5, wherein the guide pin has a length of 25cm to 35cm.

8. The sacroiliac screw implantation aid of claim 5, further comprising a probe, a head of the probe being provided with a ball having an outer diameter that is less than an inner diameter of the distal end.

9. The sacroiliac screw implantation aid of claim 5, wherein the distal end has an inner diameter of 3mm and the proximal end has an inner diameter of 4mm.

10. The sacroiliac screw implantation aid of claim 5, wherein a bend angle is provided between the head and the body of the guide cone.