WO2022160394A1

WO2022160394A1 - Flat bone drill

Info

Publication number: WO2022160394A1
Application number: PCT/CN2021/077586
Authority: WO
Inventors: 崔国庆
Original assignee: 北京大学第三医院（北京大学第三临床医学院）
Priority date: 2021-01-27
Filing date: 2021-02-24
Publication date: 2022-08-04
Also published as: CN112790821A

Abstract

Disclosed is a flat bone drill, comprising: a drill rod (1) and a drill bit (2), wherein one end of the drill rod (1) is the drill bit (2); the drill bit (2) is two drill cutters (5) extending from one end of the drill rod (1); the two drill cutters (5) are circumferentially distributed symmetrically with respect to the center line of the drill rod (1); and upper and lower ends of each drill cutter (5) at a certain distance from the end of the drill cutter (5) are respectively provided with a distance measuring stopper (4) perpendicular to the center line of the drill rod (1). The end part of the flat bone drill is flat, and may effectively avoid fascia and muscles of the subcutaneous tissue, and will not cause unnecessary damage to the fascia and muscles. Bone residue cut by the flat bone drill may be guided out from grooves formed between the drill cutters (5). During a surgical operation, doctors may see the distance measuring stopper (4) on a display screen, so as to promptly know the cutting depth of the flat bone drill.

Description

Flat bone drill

technical field

The invention relates to a bone drill, in particular to a flat bone drill used for human surgery.

technical background

The existing bone drill is a twist drill bit or auger bit similar to drilling wood or iron plate. This drill bit is cylindrical. During the operation, the skin and subcutaneous tissue of the patient should be opened with a scalpel, and then the bone drill should be inserted into the bone drill. After reaching the skin and subcutaneous tissue and reaching the bone to be drilled, the motor drives the drill to rotate to drill the bone.

The existing bone drills have the following disadvantages:

1. The end of the drill bit is cylindrical, which cannot effectively avoid the fascia and muscles of the subcutaneous tissue, which will cause damage to the fascia and muscles;

2. The end of the drill bit is cylindrical, and the bone slag cut by the bone drill can only be exported from the groove formed by the spiral blade on the bone drill. In order to reduce the friction between the bone slag and the guide pin during drilling, if If the bone slag cannot be discharged, the guide pin will be locked by the bone slag and the inner hole of the bone drill. Sometimes, in order to export the bone slag in time, the doctor must perform reverse drilling during the process of drilling the bone, so that the bone slag can be exported;

3. Now, most operations are basically done under an arthroscope or similar surgical microscope. During the operation, the doctor can only see the image received by the display screen, and the depth of the bone drilling knife cannot be accurately estimated by the doctor. .

SUMMARY OF THE INVENTION

The purpose of the invention of the present application is to solve the problems existing in the existing bone drill, and to provide a flat bone drill.

In order to complete the invention purpose of the present application, the present application adopts the following technical solutions:

A flat bone drill of the present invention comprises: a drill rod and a drill bit, one end of the drill rod is a drill bit, wherein: the drill bit is two drill blades protruding from one end of the drill rod, and the two drill blades are opposite to each other The center line of the drill pipe is symmetrically distributed on the circumference, and there are distance measuring blocks perpendicular to the center line of the drill pipe at the upper end and the lower end of the drill blade at a certain distance from the end of the drill blade.

A flat bone drill of the present invention, wherein: the drill blade is composed of an upper bevel, a lower bevel, a first side, a second side and a side bevel, and the first side and the second side are parallel to each other and parallel to the drill bit. The center line, the upper slope and the lower slope are parallel to each other, they are located at the upper and lower ends of the first side and the second side respectively, and the included angle with the first side is 45° to 75°, and the side slopes are the upper slope, the lower slope, The end surface enclosed by the first side surface and the second side surface has an included angle of 60° to 80° with the first side surface, and an included angle of 110° to 130° with the upper inclined surface.

A flat bone drill of the present invention, wherein: the drill rod and the drill bit are integral structures.

A flat bone drill of the present invention, wherein: on the outer circumference of the other end of the drill rod, there are three tightening surfaces along its circumferential direction, and the three claws of the motor clamp the three tightening surfaces to drive the drill rod to rotate .

In the flat bone drill of the present invention, a guide wire hole is opened in the center of the drill rod.

A flat bone drill of the present invention, wherein: the flat bone drill is made of 465 material specified by the ASTM F899 standard.

Compared with the existing bone drill, the flat bone drill of the present invention has the following advantages:

1. The end of the flat bone drill of the present invention is in a flat shape, which can effectively avoid the fascia and muscles of the subcutaneous tissue, and will not cause unnecessary damage to the fascia and muscles;

2. The end of the flat bone drill of the present invention is in a flat shape, and the bone residue cut by the flat bone drill of the present invention can be derived from the groove formed between the drill blades. During the process of drilling the bone, the doctor will no longer Bone slag can be exported if back-drilling is required;

3. A distance measuring block is designed on the flat bone drill of the present invention. During the operation, the doctor can see the distance measuring block on the display screen, and timely know the cutting depth of the flat bone drill of the present invention.

Description of drawings

Fig. 1 is the frontal schematic diagram of the flat bone drill of the present invention, for the sake of clarity, the figure has adopted a partial cross-section;

Fig. 2 is the top view schematic diagram of Fig. 1;

Fig. 3 is the sectional schematic diagram at A-A place in Fig. 1;

FIG. 4 is an enlarged schematic view of a drill blade.

In Figures 1 to 4, reference numeral 1 is a drill pipe; reference numeral 2 is a drill bit; reference numeral 3 is a tightening surface; reference numeral 4 is a distance measuring block; reference numeral 5 is a drill blade; The reference numeral 8 is the second side surface; the reference numeral 9 is the first side surface; the reference numeral 10 is the lower slope; the reference numeral 11 is the guide wire hole.

Detailed ways

As shown in FIGS. 1 to 4 , the flat bone drill of the present invention comprises: a drill rod 1 and a drill bit 2, the drill rod 1 and the drill bit 2 are integrally structured, and one end of the drill rod 1 is a drill bit 2, and the drill bit 2 is a drill bit 2 from the drill rod Two drill blades 5 protruding from one end of 1, the two drill blades 5 are distributed symmetrically with respect to the center line of the drill rod 1, and the drill blade 5 is composed of an upper slope 6, a lower slope 10, a first side 9, and a second side 8. It is composed of the side slope 7, the first side 9 and the second side 8 are parallel to each other and parallel to the centerline of the drill bit 2, the upper slope 6 and the lower slope 10 are parallel to each other, and they are located at the first side 9 and the second side 8 respectively. The upper end and the lower end, and the included angle with the first side 9 is 45° to 75°, the side slope 7 is the end surface enclosed by the upper slope 6, the lower slope 10, the first side 9 and the second side 8, which is connected to the first side. The included angle of one side face 9 is 60° to 80°, and the included angle between it and the upper inclined surface 6 is 110° to 130°. 1 Centerline rangefinder 4.

A guide wire hole 11 is opened in the center of the drill rod 1 . There are three tightening surfaces 3 along the circumferential direction on the outer circumference of the other end of the drill rod 1 . The three claws of the motor clamp the three tightening surfaces 3 to drive the drill rod 1 to rotate. The flat bone drill is made of 465 material specified by ASTM F899 standard.

During the operation, the doctor should first open the patient's skin and subcutaneous tissue with a scalpel, and then extend the flat bone drill of the present invention into the skin and subcutaneous tissue, because the flat bone drill of the present invention is flat and flat. The bone drill can avoid the fascia and muscles of the subcutaneous tissue. After reaching the bone to be drilled, the motor drives the drill to rotate and drill the bone. After reaching the drilling depth, the doctor can see the distance measuring block under the operating mirror. Stop drilling in time.

The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is limited by referring to the claims. The present invention can be modified in any form without departing from the spirit of the present invention.

Claims

A flat bone drill, comprising: a drill rod (1) and a drill bit (2), and one end of the drill rod (1) is a drill bit (2), characterized in that: the drill bit (2) is a drill bit (2) from the drill rod (1). 1) Two drill blades (5) protruding from one end, the two drill blades (5) are distributed symmetrically with respect to the center line of the drill rod (1), at a certain distance from the ends of the two drill blades (5). The upper end and the lower end of the drill blade (5) are respectively provided with distance measuring blocks (4) perpendicular to the centerline of the drill rod (1).
The flat bone drill according to claim 1, characterized in that: the drill blade (5) consists of an upper bevel (6), a lower bevel (10), a first side (9), a second side (8) and a side The inclined plane (7) is formed, the first side surface (9) and the second side surface (8) are parallel to each other and parallel to the centerline of the drill bit (2), the upper inclined plane (6) and the lower inclined plane (10) are parallel to each other, and they are respectively located at the center line of the drill bit (2). The upper and lower ends of the first side surface (9) and the second side surface (8), and the included angle with the first side surface (9) is 45° to 75°, and the side slope (7) is an upper slope (6) and a lower slope. (10), the end surface enclosed by the first side surface (9) and the second side surface (8), the included angle between it and the first side surface (9) is 60° to 80°, and the angle between it and the upper inclined surface (6) is The angle is 110° to 130°.
The flat bone drill according to claim 2, characterized in that: the drill rod (1) and the drill bit (2) are integral structures.
The flat bone drill according to claim 3, characterized in that: there are three tightening surfaces (3) along its circumferential direction on the outer circumference of the other end of the drill rod (1), and the three claws of the motor clamp the above The three tightening surfaces (3) drive the drill pipe (1) to rotate.
The flat bone drill according to claim 4, characterized in that: a guide wire hole (11) is opened in the center of the drill rod (1).
The flat bone drill as claimed in claim 5, wherein the flat bone drill is made of 465 material specified by the ASTM F899 standard.