WO2002015799A1

WO2002015799A1 - Sternum cutting apparatus

Info

Publication number: WO2002015799A1
Application number: PCT/CN2001/000125
Authority: WO
Inventors: Nanxiang Gao
Original assignee: Nanxiang Gao
Priority date: 2000-08-25
Filing date: 2001-02-14
Publication date: 2002-02-28
Also published as: AU2001233589A1; CN2436108Y

Abstract

The present invention relates to a sternum cutting apparatus which comprises a cutting component, transmission members, driving assembly and a shell which comprises a forward jib and a handle. The cutting component is installed on the end of the forward jib, the transmission members which drive the cutting component are fixed in forward jib, and the driving assembly which drives the transmission members is fitted in the handle. The cutting component and the handle is respectively on each of two sides of the forward jib and they are both perpendicular to the forward jib. It isbecause the forward jib is perpendicular to the handle that the incision on a patient could be made smaller and the position of the incision could be lower. This will not only be favourable for the postoperative beauty of the patient but also relieve the postoperative distress of the patient. The cutting apparatus according to the present invention may also be used as a bone drill.

Description

Forward sternum cutting saw TECHNICAL FIELD

The present invention relates to a medical bone saw, and in particular to a medical forward-extending head and sternum cutting saw. Background technique

For cardiac surgery, it is often necessary to saw the sternum longitudinally. The current sternal saw is driven by a motor or air source to drive the saw blade up and down. If the skin incision is too low, the forward movement of the saw is blocked, and the sternum cannot be completely sawn. However, the skin incision has to be made higher. Patients need to choose clothes with a high neckline after dressing. The appearance is very poor. At present, double-breast soft tissue incisions are used abroad, which causes great damage. Object of the invention

In view of this, how to provide a medical instrument that is convenient to use and has good effects and ensures that the skin incision is small during cardiac surgery and that the sternum can be sawn apart is exactly the motivation for the research and development of the present invention.

That is, the object of the present invention is to provide a forward-extending head sternal cutting saw which can cut the sternum longitudinally with a small wound. Technical solution of the present invention

The forward extension sternal cutting saw of the present invention includes a cutting element, a transmission part, a driving element and a housing. The housing is composed of a forward extension arm and a handle. The cutting element is installed on the forward extension head of the forward extension arm of the housing. The driving part that drives the cutting element to rotate is installed in the front extension arm of the housing, and the driving element that drives the driving part is installed in the handle of the housing. It is characterized in that the cutting element and the handle are on both sides of the front extension arm of the housing, and both vertical.

The cutting element described above is a drill bit that is rotatable and has a circular saw blade in cross section.

The above transmission part may be a belt transmission. The above-mentioned transmission part may also be a chain transmission.

The aforementioned drive elements are a continuously variable transmission and a motor.

The above-mentioned transmission part may be a turbine and a gas pipe, and the driving element is a high-speed air flow. Effect of the invention

Compared with the prior art, the present invention has the following advantages:

1. Because the I extension of the case and the handle of the case are vertical, using this sternal cutting saw to see the sternum, the skin incision of the patient is very small and low, which not only solves the aesthetic problem of the postoperative patient, but also causes little damage to the patient. Less pain after surgery.

2. Since the cutting element is a drill with a rotatable cross-section and a disc saw blade, it can also be used as a bone drill. The invention is further described below with reference to the drawings and embodiments.

Brief description of the drawings

FIG. 1 is a schematic structural diagram of a first specific embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a second specific embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a third specific embodiment of the present invention. The best technical solution for implementing the present invention

FIG. 1 shows a first specific embodiment of the present invention, in which the housing is composed of a front extension arm 7 and a handle 8, the front extension arm 7 and the handle 8 are at 90 degrees, and the front extension arm 4 of the housing 4 A shaft sleeve 2 is installed therein. The shaft sleeve 2 is supported by a bearing 5 fixed in the front extension arm 7. A drill bit 1 with a cross-section saw blade is installed in the shaft sleeve 2. The transmission part installed in the front extension arm 7 is It consists of a driven pulley 3 and a driving pulley 11. The driven pulley 3 is fixedly mounted on the shaft sleeve 2. The driving pulley 11 is mounted on the output shaft of the driving element. A belt is provided between the driven pulley 3 and the driving pulley 11. 6. The driving element rotates to drive the driving pulley 11 to rotate. Passing the belt 6 can drive the driven pulley 3 to rotate, so that the sleeve 2 and the drill bit 1 are rotated. Pulling the cutting saw can open the sternum. When in use, the forward head 4 of the forward arm 7 is inserted into the skin incision. The arm 7 and the handle 8 are perpendicular, so the skin incision can be made very small, and the sternum above the skin incision can be sawn, so there is no need to make the skin incision large.

FIG. 2 shows a second specific embodiment of the present invention, which is to change the driven pulley 3, the driving pulley 11, and the belt 6 to the driven sprocket 12, the driving sprocket 13, and the chain 4. The rest are the same as the first detailed description.

FIG. 3 shows a third specific embodiment of the present invention. The turbine sleeve 15 is mounted on the shaft sleeve 2. The front extension 7 and the handle 8 are provided with a pipe 16 inside. The driving element is high-speed airflow. The joint 17 is connected to the high-speed airflow pipeline. The high-speed airflow hits the turbine 15 through the pipeline 16 to rotate the turbine 15. The rotation of the turbine 15 drives the shaft sleeve 2 and the cutting bit 1 to complete the task of sawing the sternum. . The forearm 7 and the pipeline 16 may be pipes that can be bent at a certain angle.

The above are the specific embodiments of the present invention and the technical principles used. If equivalent changes are made according to the concept and principles of the present invention, the functional effects still do not exceed the spirit covered by the description and drawings. All are within the scope of the present invention, and are hereby explained.

Claims

Rights request

1. A forward-extending head sternal cutting saw, comprising a cutting element, a transmission part, a driving element and a casing, the casing is composed of a forward-extending arm and a handle, and the cutting element is installed on the forward-extending head of the forward-extending arm of the casing The driving part that drives the cutting element to rotate is installed in the outrigger, and the driving element that drives the driving part is installed in the handle of the housing, which is characterized in that the cutting element (1) and the handle (8) are respectively located in the forward arm (7) Both sides are perpendicular to the forearm (7).

2. A forward-extending sternal cutting saw according to claim 1, characterized in that said cutting element (1) is a drill with a cross-section of a circular saw blade.

3. A forward-extending sternal cutting saw according to claim 1, characterized in that said driving elements are a continuously variable transmission (10) and a motor (9).

4. A forward-extending sternal cutting saw according to claim 1, characterized in that said transmission part is composed of a driven pulley (3), a driving pulley (11) and a belt (6) therebetween. The driving pulley (11) is installed on the output shaft of the driving element, and the driven pulley (3) is installed on the cutting element (1).

5. A forward-extending sternal cutting saw according to claim 1, characterized in that said transmission part is driven by a driven sprocket (12), a driving sprocket (13) and a chain (14) between them. ), The driven sprocket (12) is mounted on the cutting element (1), and the driving sprocket (13) is mounted on the output shaft of the driving element.

6. A forward-extending sternal cutting saw according to claim 1, characterized in that the transmission part is a turbine (15) and a pipeline (16) and a pipe joint (16) mounted on the cutting element (1). 17).

7. A forward-extending head and sternum cutting saw according to claim 1 or 6, wherein said driving element is a high-speed airflow.

8. A forward-extending head and sternum cutting saw according to claim 7, characterized in that said forward-extending arms (7) and pipes (16) are tubes which can be bent at a certain angle.