CN209203417U - A kind of minimally invasive planing tool - Google Patents

Abstract

The utility model provides a minimally invasive planer, which includes an inner tube and an outer tube. The inner tube is sheathed inside the outer tube. There is a first side end surface, the end of the first side end surface is provided with a first side edge, and the first side end surface forms a first side edge angle with the inner wall of the outer tube; the first side edge angle is 30-90° . The utility model processes the angle of the side edge of the minimally invasive planer to 30-90°, improves the original cutting method, improves the use performance of the planer and improves the operation quality.

Description

A minimally invasive planer

technical field

The utility model relates to the field of medical equipment, in particular to a minimally invasive planer for minimally invasive surgery.

Background technique

At present, there is no unified standard for the structural dimensions of the planer used in arthroscopic surgery, and the structure of the planer teeth is designed and manufactured without considering the principle of biological tissue removal. Because the sharpness of the cutting tooth tips of the existing minimally invasive planer outer tube is insufficient, it cannot effectively penetrate into the cartilage tissue and meniscus tissue, so that the fixing effect of the outer tube and the occlusal resection effect of the inner and outer tubes are reduced, and it cannot play a significant role. Good positioning effect, resulting in reduced resection efficiency. In addition, arthroscopic minimally invasive surgery requires the resection process to be close to shearing, without tissue tearing, and requires good surface smoothness of the cut site. It can be observed from Figure 1 that there is a large gap at the position where the tip of the cutting teeth of the inner and outer tubes contacts the tissue during the excision process of the minimally invasive planer commonly used in the prior art. The larger the gap, the greater the cutting force, which is more likely to cause tearing, resulting in secondary injury to the patient during the operation. Reducing the gap between the tip of the inner and outer tube cutting teeth and the tissue contact position can make the resection process closer to the shearing action, reduce the cutting force, improve the cutting efficiency and the surface smoothness of the cut part after operation, which is beneficial to the smooth progress of the operation and the patient rehabilitation.

In addition, the tooth width of the cutting tooth tip of the commonly used planer is the thickness of the tube wall. Therefore, during the cutting process, the contact mode between the tooth tip and the tissue is line contact, which greatly reduces the puncture ability of the cutting tooth on cartilage tissue and meniscus tissue. , the sharpness decreases and the cutting efficiency decreases.

Utility model content

Aiming at the problems existing in the existing minimally invasive planer, the utility model provides a minimally invasive planer. In order to improve the puncture ability of the tip of the cutting edge and the sharpness of the minimally invasive planer, the angle of the side edge of the minimally invasive planer is processed to 30° -90°, which improves the original resection method, improves the performance of the planer and improves the quality of the operation.

The technical solution of the utility model is: a minimally invasive planer, including an inner tube and an outer tube, the inner tube is sleeved inside the outer tube, and the feature is that the inner tube includes a first cutter tooth portion, and the second A knife tooth portion is provided with a first side end surface, and the end of the first side end surface is provided with a first side edge, and the first side end surface and the inner wall of the outer tube form a first side edge angle; the first side edge angle is 30-90°.

Further, the outer tube includes a second knife-tooth portion, the second knife-tooth portion is provided with a second side end surface, and the end of the second side end surface is provided with a second side edge, and the second side end surface and the inner The outer wall of the tube forms a second side edge angle; the second side edge angle is 30-90°.

In the utility model, the angle of the first side edge and the second side edge of the minimally invasive planer are processed to 30-90°, the cutting process is closer to the shearing action, more similar to scissors, avoiding tissue tearing during the operation, and reducing secondary The incidence of mechanical damage is improved, the original resection method is improved, the performance of the planer is improved, and the quality of operation is improved.

Further, the inner tube is a hollow tube body.

Further, the outer tube is a hollow tube body.

Further, the inner tube can rotate freely in the outer tube.

Furthermore, the angle of the first side edge is 45-75°.

Furthermore, the angle of the second side edge is 45-75°.

Particularly, the utility model is based on the prior art, as shown in Fig. 1, defines the cutter tooth portion, the side end surface, and the side blade of the utility model.

In the utility model, the minimally invasive planer is composed of a stainless steel outer sheath tube with a diameter of 1.9-5.5 mm, a rotatable hollow inner tube and corresponding suction and cutting windows, that is, a "tube-in-tube" structure. In arthroscopic minimally invasive surgery, the minimally invasive planer is connected with the suction device, so that the inner tube window forms a negative pressure, and the tissue to be cut is attracted to the cutting window. During the tissue removal process, the rotation of the inner tube cutting teeth drives the tissue , so that the tissue is close to the cutting teeth of the outer tube, and the fixed outer tube penetrates into the internal tissue through the cutting teeth to play a certain role in fixing, and the relative rotation of the inner and outer tubes realizes the occlusal resection of the cartilage tissue and meniscus.

The beneficial effects of the utility model are:

1. Effectively reduce the gap between the tip of the inner and outer tube cutting teeth and the contact position of the tissue; the cutting process is closer to the shearing action, more similar to scissors, avoiding tissue tearing during the operation, reducing the incidence of secondary mechanical damage, and improving postoperative trauma. The surface flatness of the incision site ensures good contact between the knee articular cartilage and meniscus after surgery, which is conducive to postoperative rehabilitation and reduces the incidence of complications.

2. Greatly reduce the tooth width of the cutting tooth tip of the planer, and change from the original line contact to point contact, which can greatly improve the puncture ability and the fixation ability of the outer tube to the tissue during the operation.

3. The angle of the side edge of the commonly used minimally invasive planer is 90°. In this design, the side edge is designed to be 30-90°, which can effectively improve the sharpness of the planer.

Description of drawings

Fig. 1 is the structural representation of minimally invasive planer in the prior art;

Fig. 2 is a schematic diagram of the inner tube structure of the utility model;

Fig. 3 is a schematic diagram of the structure of the outer tube of the utility model;

Fig. 4 is the structural representation of the utility model;

Fig. 5 is a schematic diagram of a planer excision model in the prior art;

Fig. 6 is a schematic diagram of the cutting model of the planer in the utility model.

Detailed ways

The preferred embodiments of the utility model are given below in conjunction with the accompanying drawings to describe the technical solution of the utility model in detail.

Example 1

A minimally invasive planer 1, comprising an inner tube 2 and an outer tube 3, the inner tube is sheathed inside the outer tube, characterized in that the inner tube 2 includes a first knife tooth portion 20, and the first knife tooth The first side end surface 21 is provided at the top, and the end of the first side end surface is provided with a first side edge 22, and the first side end surface and the inner wall of the outer tube form a first side edge angle; the first side edge angle is 30 °.

Further, the outer tube 3 includes a second knife tooth part 30, the second knife tooth part is provided with a second side end surface 31, and the end of the second side end surface is provided with a second side edge 32, and the second side end surface is provided with a second side edge 32. The side end surface and the outer wall of the inner tube form a second side edge angle; the second side edge angle is 30°.

Further, the inner tube is a hollow tube body.

Further, the outer tube is a hollow tube body.

Further, the inner tube can rotate freely in the outer tube.

In particular, the utility model is based on the prior art, as shown in FIG. 1 , defining the tooth portion 10 , the side end surface 11 , and the side blade 12 referred to in the utility model.

In the utility model, the minimally invasive planer is composed of a stainless steel outer sheath tube with a diameter of 1.9-5.5 mm, a rotatable hollow inner tube and corresponding suction and cutting windows, that is, a "tube-in-tube" structure. In arthroscopic minimally invasive surgery, the minimally invasive planer is connected with the suction device, so that the inner tube window forms a negative pressure, and the tissue to be cut is attracted to the cutting window. During the tissue removal process, the rotation of the inner tube cutting teeth drives the tissue , so that the tissue is close to the cutting teeth of the outer tube, and the fixed outer tube penetrates into the internal tissue through the cutting teeth to play a certain role in fixing, and the relative rotation of the inner and outer tubes realizes the occlusal resection of the cartilage tissue and meniscus.

Example 2

A minimally invasive planer 1, comprising an inner tube 2 and an outer tube 3, the inner tube is sheathed inside the outer tube, characterized in that the inner tube 2 includes a first knife tooth portion 20, and the first knife tooth A first side end surface 21 is provided on the top of the first side end surface, and a first side edge 22 is provided at the end of the first side end surface, and a first side edge angle is formed between the first side end surface and the inner wall of the outer tube; the first side edge angle is 90° °.

Further, the outer tube 3 includes a second knife tooth part 30, the second knife tooth part is provided with a second side end surface 31, and the end of the second side end surface is provided with a second side edge 32, and the second side end surface is provided with a second side edge 32. The side end surface and the outer wall of the inner tube form a second side edge angle; the second side edge angle is 90°.

Further, the inner tube is a hollow tube body.

Further, the outer tube is a hollow tube body.

Further, the inner tube can rotate freely in the outer tube.

Example 3

A minimally invasive planer 1, comprising an inner tube 2 and an outer tube 3, the inner tube is sheathed inside the outer tube, characterized in that the inner tube 2 includes a first knife tooth portion 20, and the first knife tooth The first side end surface 21 is provided at the top, and the end of the first side end surface is provided with a first side edge 22, and the first side end surface and the inner wall of the outer tube form a first side edge angle; the first side edge angle is 45 °.

Further, the outer tube 3 includes a second knife tooth part 30, the second knife tooth part is provided with a second side end surface 31, and the end of the second side end surface is provided with a second side edge 32, and the second side end surface is provided with a second side edge 32. The side end surface and the outer wall of the inner tube form a second side edge angle; the second side edge angle is 45°.

Further, the inner tube is a hollow tube body.

Further, the outer tube is a hollow tube body.

Further, the inner tube can rotate freely in the outer tube.

Example 4

A minimally invasive planer 1, comprising an inner tube 2 and an outer tube 3, the inner tube is sheathed inside the outer tube, characterized in that the inner tube 2 includes a first knife tooth portion 20, and the first knife tooth The first side end surface 21 is provided at the top, and the end of the first side end surface is provided with a first side edge 22, and the first side end surface and the inner wall of the outer tube form a first side edge angle; the first side edge angle is 30 -90°.

Further, the outer tube 3 includes a second knife tooth part 30, the second knife tooth part is provided with a second side end surface 31, and the end of the second side end surface is provided with a second side edge 32, and the second side end surface is provided with a second side edge 32. The side end surface and the outer wall of the inner tube form a second side edge angle; the second side edge angle is 75°.

In the utility model, the first side edge angle and the second side edge angle of the minimally invasive planer are processed to 75°, and the cutting process is closer to the shearing action, which is more similar to scissors, avoids tissue tearing during the operation, and reduces secondary mechanical damage The incidence rate is improved, the original resection method is improved, the use performance of the planer is improved, and the operation quality is improved.

Further, the inner tube is a hollow tube body.

Further, the outer tube is a hollow tube body.

Further, the inner tube can rotate freely in the outer tube.

Example 5

A minimally invasive planer 1, comprising an inner tube 2 and an outer tube 3, the inner tube is sheathed inside the outer tube, characterized in that the inner tube 2 includes a first knife tooth portion 20, and the first knife tooth A first side end surface 21 is provided at the top of the first side end surface, and a first side edge 22 is provided at the end of the first side end surface, and a first side edge angle is formed between the first side end surface and the inner wall of the outer tube; the first side edge angle is 60° °.

Further, the outer tube 3 includes a second knife tooth part 30, the second knife tooth part is provided with a second side end surface 31, and the end of the second side end surface is provided with a second side edge 32, and the second side end surface is provided with a second side edge 32. The side end surface and the outer wall of the inner tube form a second side edge angle; the second side edge angle is 60°.

Further, the inner tube is a hollow tube body.

Further, the outer tube is a hollow tube body.

Further, the inner tube can rotate freely in the outer tube.

Example 6

A minimally invasive planer 1, comprising an inner tube 2 and an outer tube 3, the inner tube is sheathed inside the outer tube, characterized in that the inner tube 2 includes a first knife tooth portion 20, and the first knife tooth The first side end surface 21 is provided at the top, and the first side end surface is provided with a first side edge 22, and the first side end surface and the inner wall of the outer tube form a first side edge angle; the first side edge angle is 85° °.

Further, the outer tube 3 includes a second knife tooth part 30, the second knife tooth part is provided with a second side end surface 31, and the end of the second side end surface is provided with a second side edge 32, and the second side end surface is provided with a second side edge 32. The side end surface and the outer wall of the inner tube form a second side edge angle; the second side edge angle is 85°.

Further, the inner tube is a hollow tube body.

Further, the outer tube is a hollow tube body.

Further, the inner tube can rotate freely in the outer tube.

Example 7

A minimally invasive planer 1, comprising an inner tube 2 and an outer tube 3, the inner tube is sheathed inside the outer tube, characterized in that the inner tube 2 includes a first knife tooth portion 20, and the first knife tooth The first side end surface 21 is provided at the top, the end of the first side end surface is provided with a first side edge 22, and the first side end surface and the inner wall of the outer tube form a first side edge angle; the first side edge angle is 40 °.

Further, the outer tube 3 includes a second knife tooth part 30, the second knife tooth part is provided with a second side end surface 31, and the end of the second side end surface is provided with a second side edge 32, and the second side end surface is provided with a second side edge 32. The side end surface and the outer wall of the inner tube form a second side edge angle; the second side edge angle is 40°.

Further, the inner tube is a hollow tube body.

Further, the outer tube is a hollow tube body.

Further, the inner tube can rotate freely in the outer tube.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art. For all technical details not exhaustively described in the utility model, all can be realized by any prior art in this field.

Claims (6)

1. A minimally invasive planer, comprising an inner tube and an outer tube, the inner tube is sleeved inside the outer tube, it is characterized in that the inner tube includes a first knife tooth portion, and the first knife tooth portion is provided with The first side end surface, the end of the first side end surface is provided with a first side edge, and the first side end surface forms a first side edge angle with the inner wall of the outer tube; the first side edge angle is 30-90°; The outer tube includes a second knife tooth part, the second knife tooth part is provided with a second side end surface, and the end of the second side end surface is provided with a second side edge, and the second side end surface and the outer wall of the inner tube form a second side end surface. Two side edge angles; the second side edge angle is 30-90°. 2. A minimally invasive planer according to claim 1, wherein the inner tube is a hollow tube. 3. A minimally invasive planer according to claim 1, wherein the outer tube is a hollow tube. 4. A minimally invasive planer according to claim 1, wherein the inner tube can rotate freely in the outer tube. 5. A minimally invasive planer according to claim 1, wherein the angle of the first side edge is 45-75°. 6 . The minimally invasive planer according to claim 1 , wherein the angle of the second side edge is 45-75°.