CN219147756U

CN219147756U - Detachable reamer

Info

Publication number: CN219147756U
Application number: CN202222258025.4U
Authority: CN
Inventors: 闫明; 游勤光
Original assignee: Maoyu Qingdao Medical Technology Co ltd
Current assignee: Maoyu Qingdao Medical Technology Co ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2023-06-09
Anticipated expiration: 2032-08-26

Abstract

The detachable reamer provided by the utility model provides a novel connecting structure for easily disassembling and assembling the rod part and the handle, so that the rod part can be flexibly replaced according to the integrity of saw teeth at the working end on the premise of not reducing the cutting capability, even a disposable use mode of the reamer can be realized, and the efficient operation can be ensured, and the situations of tooth breakage, tooth breakage and the like can be avoided. Dismantlement formula reamer includes interconnect's pole portion and handle, is provided with annular sawtooth at pole portion front end, its characterized in that: a connecting part is fixedly nested in the axial center of the handle, the connecting part is connected with the end part of the rod part through internal and external threads, and a central through hole of the connecting part is communicated with a hollow cavity of the rod part.

Description

Detachable reamer

Technical Field

The utility model relates to a reamer with a rod part and a handle easy to detach and replace, and belongs to the field of medical appliances.

Background

At present, along with the rapid development of the endoscope technology, the development of the treatment of the spinal surgery indication by means of the endoscope is further popularized and applied. In the background of the aggravated aging of the population, the incidence rate of spinal diseases such as hyperosteogeny, yellow ligament hypertrophy, herniated disc, high loss of intervertebral disc, lumbar spondylolisthesis and the like is greatly increased. Especially for the symptoms of spine instability such as lumbar spondylolisthesis, the treatment of the hyperosteogeny of the fibrous ring and the rear edge of the vertebral body is a necessary step in the minimally invasive fusion operation process.

The reamer that current used is that metal rod cutting process forms, and handle and pole portion welding shaping not only manufacturing cost is higher and after long-term reuse, and the frequency of use is higher and appear cutting efficiency decline generally, appear breaking teeth even broken tooth etc. and directly influence the operation normal clear, still can fall in the patient body because of breaking teeth when serious, still can take place the medical malpractice that can't pick up after the accident occasionally.

This patent application is specifically filed by reference thereto.

Disclosure of Invention

The utility model provides a dismantlement formula reamer, its design aim at solves the not enough that above-mentioned prior art exists and proposes a pole portion and the novel connection structure of handle quick detachable equipment to under the prerequisite that does not reduce the chisel ability, change pole portion in a flexible way according to the intact degree of work end sawtooth, can realize the disposable mode of reamer even, can ensure that the operation carries out with avoiding the emergence of circumstances such as broken tooth, broken tooth effectively.

For realizing the above-mentioned design purpose, dismantlement formula reamer include interconnect's pole portion and handle, be provided with annular sawtooth at pole portion front end, its characterized in that: a connecting part is fixedly nested in the axial center of the handle, the connecting part is connected with the end part of the rod part through internal and external threads, and a central through hole of the connecting part is communicated with a hollow cavity of the rod part.

Further, the handle and the connecting portion are formed into an integral structure by encapsulation and injection molding.

Further, an annular groove is provided at the outer periphery of the connecting portion.

Further, the radial cross-sectional shape of the connecting portion is regular hexagonal.

In summary, the detachable reamer provided in the present application has the following advantages:

1. the method meets the minimally invasive, visual and safe operation requirements of clinical requirements, has higher applicability and extensive compatibility of the under-lens fusion operation, and is more suitable for clinical use and popularization in spinal fusion operation.

2. The handle rubber coating process is reasonable in structure, simple and flexible in disassembly and assembly mode of the handle and the rod part, and the handle rubber coating process only needs to be opened once, so that the cost is low, and the operation cost and the burden of patients are correspondingly reduced.

3. By the application of the reamer, the existing reusable reamer is changed into the reamer which can be detached and replaced at any time and is even disposable, so that the cutting capability of the instrument is effectively guaranteed, the instrument is not damaged during operation, medical accidents caused by missing broken teeth in a patient are avoided, and the surgical efficiency is improved.

4. The application is beneficial to reducing complex disinfection and sterilization procedures and correspondingly reducing the workload of medical care.

Drawings

The design of the present application will now be further described in connection with the following figures.

FIG. 1 is a schematic view of a removable reamer of the present application;

FIG. 2 is an exploded view of the structure shown in FIG. 1;

fig. 3 is an enlarged schematic view of a partial structure of fig. 2.

Detailed Description

Additional advantages and features of the present application can be derived from the following description, in which embodiments are set forth in detail with reference to the figures.

Example 1, as shown in fig. 1 to 3, the present application proposes a new type of detachable reamer for use in spinal surgery treatment, comprising a stem 1 and a handle 2 connected to each other;

the external dimension of the rod part 1 cannot be too large to minimize the operation wound, the rod part 1 is provided with a hollow internal cavity, and the front end of the rod part 1 is provided with annular saw teeth 3 to match with various working cannulas for using the spinal endoscope and accommodating the spinal endoscope for tissue cutting.

The handle 2 has a section and a volume which are obviously larger than the external dimension of the rod part 1, so that the rotary rod part 1 is convenient to hold and operate to drive the saw teeth 3 to chisel various tissues.

A connecting part 4 is fixedly nested in the axial center of the handle 2, the connecting part 4 is connected with the end part of the rod part 1 through internal and external threads, the connecting part 4 is provided with a central through hole, and the through hole is communicated with the hollow cavity of the rod part 1 to accommodate and allow the spinal endoscope to penetrate through the through hole, so that the fusion operation under the condition of direct vision of the endoscope is realized.

The connecting part 4 is made of metal, such as stainless steel, and is provided with an annular groove 41 at the periphery thereof; the handle 2 is made of non-metal materials, such as hard plastic, and the handle 2 and the connecting part 4 are processed and molded into an integral structure through encapsulation and injection molding. During injection molding, a part of the injection molding agent in a liquid state at a high temperature flows into the groove 41 to strengthen the connection between the handle 2 and the connecting portion 4.

Further, the radial cross-sectional shape of the connecting portion 4 is regular hexagonal. The connecting part 4 has a symmetrical stress structure, and in the injection molding process, the injection molding agent can form uniform tension connection on the surface of the connecting part 4, so that the connection of the connecting part and the injection molding agent is firmer.

By the application of the novel handle, when the saw teeth 3 are seriously worn or the teeth are broken, the rod part 1 can be conveniently detached from the handle 2 in a rotating way, and the novel rod part 1 is replaced for use.

In summary, the embodiments presented in connection with the figures are only preferred. It will be apparent to those skilled in the art from this disclosure that other alternative constructions, which are in accordance with the design concept of the present utility model, can be directly derived and are intended to fall within the scope of the utility model as described herein.

Claims

1. The utility model provides a dismantlement formula reamer, includes interconnect's pole portion and handle, is provided with annular sawtooth at pole portion front end, its characterized in that: a connecting part is fixedly nested in the axial center of the handle, the connecting part is connected with the end part of the rod part through internal and external threads, and a central through hole of the connecting part is communicated with a hollow cavity of the rod part;

an annular groove is formed in the periphery of the connecting part, and the radial cross section of the connecting part is regular hexagonal;

the handle and the connecting part are processed and molded into an integrated structure through rubber coating and injection molding.