CN210472217U

CN210472217U - Trepan leading-in device

Info

Publication number: CN210472217U
Application number: CN201920358349.0U
Authority: CN
Inventors: 徐瑞生; 李华; 徐宏坤
Original assignee: Wuxi No 3 Peoples Hospital
Current assignee: Wuxi No 3 Peoples Hospital
Priority date: 2019-03-20
Filing date: 2019-03-20
Publication date: 2020-05-08
Anticipated expiration: 2029-03-20

Abstract

The utility model belongs to the technical field of the medical treatment new surgical instruments, the purpose is in order to link together with the serration trepan, can reduce the damage that the serration of trepan caused to soft tissues such as muscle, manadesma in the operation that the guide serration trepan inserted the soft tissue. The trepan introducer is characterized in that the head end is round and blunt, the head end and the body part can be inserted into a central hole of the serration trepan, two circles of male threads are designed at the position, close to the tail end, of the body part and are matched with female threads in the central hole of the serration trepan, and when the trepan introducer is inserted into the serration trepan, the female threads and the male threads can be screwed up clockwise and unscrewed anticlockwise. When the trepan introducer is used for guiding the serration trepan to be inserted into soft tissues, the damage of sharp serration of the trepan to the soft tissues can be reduced, the pain is relieved, and the spinal endoscope (transforaminal endoscope) operation is more minimally invasive.

Description

Trepan leading-in device

Technical Field

The present invention relates to a new device in the field of medical devices. In particular to a trepan introducer which can be assembled with a serration trepan and then safely inserted into an intervertebral foramen in a spinal endoscopy (intervertebral foramen) operation.

Background

Spinal endoscopic (foraminoscopy) surgery is a minimally invasive procedure performed under local anesthesia and is used for the treatment of lumbar disc herniation and lumbar spinal stenosis. It is often necessary to perform an enlarged intervertebral foramen during a surgical procedure in order to accurately place the foramen into the working channel. The intervertebral foramen enlargement needs to adopt a serration trepan to cut the bony structures such as the facet joints forming the posterior wall of the intervertebral foramen, and the serration trepan is usually inserted into the intervertebral foramen along a sleeve in the prior art, so that sharp serration of the trepan can bring severe pain when the trepan passes through soft tissues.

The operation of inserting the trepan is always the most uncomfortable and painful step for patients in the whole spinal endoscopic (transforaminal) operation. Even partial patients can generate psychological fear and obstacle to spinal endoscope minimally invasive surgery due to severe pain caused by inserting the trepan, and further the cooperation between doctors and patients in the follow-up operation of the intervertebral foramen endoscope is influenced.

Therefore, a trepan introducer needs to be designed in the intervertebral foramen enlargement plasty, when the trepan is guided to reach the intervertebral foramen through soft tissues, the trepan introducer can reduce the damage of the serration to the soft tissues, eliminate the pain response of a patient and fully embody the aim of small trauma of the spinal endoscope (intervertebral foramen scope) minimally invasive surgery.

Disclosure of Invention

An object of the utility model is to provide a during intervertebral foramen enlarges the plasty among backbone scope (intervertebral foramen mirror) operation can guide the serration trepan to loop through skin, subcutaneous fat, dark manadesma and muscle and trepan gator, the characteristic is the head end round blunt, the central hole of serration trepan can be inserted to head end and somatic part, the nearly tail end department design of somatic part has two rings of male screw threads, it is identical with the female screw thread in the serration trepan central hole, when the trepan gator inserts the serration trepan, female screw thread and male screw thread can be screwed up clockwise and counter-clockwise pine soon.

Specification of trepan introducer: the trepan introducer is divided into three specifications of big, medium and small according to the difference of the outer diameter and the inner diameter of the trepan introducer, and can be inserted into the serration trepan of the big, medium and small specifications to be assembled together.

The circular blunt end of the trepan introducer exceeds the serration of the serration trepan by 2mm, and the serration of the trepan introducer is positioned behind the circular blunt end of the trepan introducer, so that the sharp serration cannot be felt when the circular blunt end of the trepan introducer is touched from the front, and the soft tissue can be prevented from being damaged by the sharp serration when the circular blunt end of the trepan introducer is inserted into the soft tissue.

Drawings

FIG. 1 is a cross-sectional view of a trepan introducer; FIG. 2 is a schematic view of the trepan introducer and the serration trepan assembled together; FIG. 3 is a schematic representation of the trephine introducer guiding the insertion of a serration trephine into soft tissue; the figures are labeled as follows: 1-the head end of a trepan introducer; 2-body of trepan introducer; 3-male threads of the body; 4-tail end of trepan introducer; 5-serration of serration trephine; 6-female thread of central hole of serration trepan; 7-the trepan introducer and the serration trepan are assembled into a whole; 8-a guide rod; 9-intervertebral foramen.

Detailed Description

In the spinal endoscopy (intervertebral foramen mirror) operation, when the operation of placing the guide rod is completed, namely the head end of the guide rod is placed to the intervertebral foramen part and the tail end of the guide rod is exposed outside the skin, the trepan introducer and the serration trepan (figure 2) which are mutually screwed and assembled into a whole through threads are firstly sleeved outside the guide rod, then the trepan introducer and the serration trepan (figure 3) which are integrated are pushed into the deep part along the direction of the guide rod, and the trepan introducer and the serration trepan reach the intervertebral foramen part layer by layer through soft tissues, and the bony blockage can be obviously felt at the moment. Then the trepan is held still, the trepan introducer is rotated anticlockwise, the threaded connection between the trepan introducer and the serration trepan is loosened, the trepan introducer is pulled out from the serration trepan, the serration trepan is remained in a body, and the serration of the trepan is abutted against bony structures such as facet joints at intervertebral foramen, so that the operation of introducing the serration trepan into the intervertebral foramen is completed. In the next step, the serration trephine can be rotated clockwise to complete the foramen enlargement.

Claims

1. The trepan introducer is characterized by consisting of a round blunt head end (1), a body part (3) with two circles of male threads (2) and a tail end, and a central hole is formed in the trepan introducer; the body part (3) is divided into three types, namely a large type, a middle type and a small type according to the thickness of the outer diameter and the inner diameter of the body part; the male thread (2) of the trepan introducer body is matched with the female thread of the serration trepan, and when the trepan introducer is connected with the serration trepan, the male thread (2) and the female thread can be screwed up clockwise and unscrewed anticlockwise.

2. The trepan introducer of claim 1, wherein the trepan introducer is of three types, namely a large type, a middle type and a small type, can be respectively inserted into central holes of the fine-toothed trepans of large, middle and small sizes to be assembled together, and is tightly connected into a whole after being screwed clockwise by connecting threads.

3. The jigsaw introducer of claim 1, further characterized in that, when assembled with the jigsaw, the blunt tip (1) of the jigsaw introducer extends 2mm beyond the serrations of the jigsaw so that the serrations of the jigsaw are located rearwardly of the blunt tip (1) of the jigsaw introducer.