CN108378892B - Minimally invasive planing tool - Google Patents

Abstract

The invention provides a minimally invasive planer tool, which comprises an inner pipe and an outer pipe, wherein the inner pipe is sleeved in the outer pipe, and is characterized in that the inner pipe comprises a first cutter tooth part, the first cutter tooth part is provided with a first side end surface, the tail 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 pipe form a first side edge angle; the first side edge angle is 30-90 degrees. The invention processes the angle of the side edge part of the minimally invasive planer tool into 30-90 degrees, improves the original cutting mode, improves the usability of the planer tool and improves the operation quality.

Description

A minimally invasive planer

Technical field

The invention relates to the field of medical instruments, and in particular to a minimally invasive planer used for minimally invasive surgery.

Background technique

Currently, there is no unified standard for the structural dimensions of planers used in arthroscopic surgery. The structure of the planer teeth is not designed and manufactured with the principle of removal of biological tissue in mind. Since the tips of the cutting teeth of the outer tube of the existing minimally invasive planer are not sharp enough, they cannot effectively penetrate into the cartilage tissue and meniscus tissue, which reduces the fixation effect of the outer tube and the occlusal resection effect of the inner and outer tubes, and cannot play a significant role. Poor positioning results in reduced resection efficiency. In addition, minimally invasive arthroscopic surgery requires that the resection process be close to shearing, without tissue tearing, and the surface of the cut site must be smooth after surgery. It can be observed from Figure 1 that during the resection process of the minimally invasive planer commonly used in the prior art, there is a large gap at the position where the cutting tooth tip of the inner and outer tubes contacts the tissue. The larger the gap, the greater the cutting force, which is more likely to cause tearing and secondary injury to the patient during the operation. Reducing the gap between the cutting edge of the inner and outer tubes and the tissue contact can make the resection process closer to the shearing effect, reduce the cutting force, improve the cutting efficiency and the surface smoothness of the cut area after surgery, which is beneficial to the smooth progress of the operation and the patient. of recovery.

In addition, the width of the tooth tip of the commonly used planer cutting teeth is the thickness of the tube wall. Therefore, during the resection process, the contact between the tooth tip and the tissue is linear contact, which greatly reduces the ability of the cutting teeth to penetrate cartilage tissue and meniscus tissue. , the sharpness decreases and the cutting efficiency decreases.

Contents of the invention

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

The technical solution of the present invention is: a minimally invasive planer, including 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 tooth portion, and the first tooth portion is The tooth portion is provided with a first side end surface, and a first side edge is provided at the end of the first side end surface. 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°.

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

In the present invention, the angle of the first side edge and the angle of the second side edge of the minimally invasive planer are processed to 30-90°. The resection process is closer to the shearing effect and more similar to scissors, which avoids tissue tearing during the operation and reduces secondary machinery. The incidence of injury has been improved, the original resection method has been improved, the performance of the planer has been improved, and the quality of surgery has been improved.

Further, the inner tube is a hollow tube body.

Further, the outer tube is a hollow tube body.

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

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

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

In particular, the present invention is based on the prior art, as shown in Figure 1, and defines the tooth portion, side end surface, and side blade referred to in the present invention.

In the present invention, 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 to the suction device to form a negative pressure in the inner tube window, attracting the tissue to be cut into the cutting window. During the tissue resection process, the rotational movement of the inner tube cutting teeth drives the tissue , causing the tissue to approach the cutting teeth of the outer tube, and the fixed outer tube penetrates the internal tissue through the cutting teeth to play a certain fixation role. The relative rotation of the inner and outer tubes achieves the occlusal resection of the cartilage tissue and meniscus.

The beneficial effects of the present invention are:

1. Effectively reduce the gap between the cutting tooth tip of the inner and outer tubes and the contact position with the tissue; the resection process is closer to the shearing effect and more similar to scissors, which avoids tissue tearing during the operation, reduces the incidence of secondary mechanical damage, and improves postoperative recovery. The smoothness of the surface of the incision site ensures good contact between the patient's knee cartilage and meniscus after surgery, which is beneficial to the patient's postoperative recovery and reduces the occurrence of complications.

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

3. The angle of the side edge of commonly used minimally invasive planers 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

Figure 1 is a schematic structural diagram of a minimally invasive planer in the prior art;

Figure 2 is a schematic diagram of the inner tube structure of the present invention;

Figure 3 is a schematic structural diagram of the outer tube of the present invention;

Figure 4 is a schematic structural diagram of the present invention;

Figure 5 is a schematic diagram of a planer resection model in the prior art;

Figure 6 is a schematic diagram of the planer cutting model in the present invention.

Detailed ways

Preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.

Example 1

A minimally invasive planer 1 includes an inner tube 2 and an outer tube 3. The inner tube is sleeved inside the outer tube. It is characterized in that the inner tube 2 includes a first tooth portion 20, and the first tooth portion 20 is There is a first side end surface 21 at the end, and a first side edge 22 is provided at the end of the first side end surface. 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 blade tooth portion 30, the second blade tooth portion is provided with a second side end surface 31, and a second side edge 32 is provided at the end of the second side end surface. 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.

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

In particular, the present invention is based on the prior art, as shown in Figure 1, and defines the tooth portion 10, the side end surface 11, and the side blade 12 referred to in the present invention.

In the present invention, 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 to the suction device to form a negative pressure in the inner tube window, attracting the tissue to be cut into the cutting window. During the tissue resection process, the rotational movement of the inner tube cutting teeth drives the tissue , causing the tissue to approach the cutting teeth of the outer tube, and the fixed outer tube penetrates the internal tissue through the cutting teeth to play a certain fixation role. The relative rotation of the inner and outer tubes achieves the occlusal resection of the cartilage tissue and meniscus.

Example 2

A minimally invasive planer 1 includes an inner tube 2 and an outer tube 3. The inner tube is sleeved inside the outer tube. It is characterized in that the inner tube 2 includes a first tooth portion 20, and the first tooth portion 20 is There is a first side end surface 21 at the end, and a first side edge 22 is provided at the end of the first side end surface. 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 90 °.

Further, the outer tube 3 includes a second blade tooth portion 30, the second blade tooth portion is provided with a second side end surface 31, and a second side edge 32 is provided at the end of the second side end surface. 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.

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

Example 3

A minimally invasive planer 1 includes an inner tube 2 and an outer tube 3. The inner tube is sleeved inside the outer tube. It is characterized in that the inner tube 2 includes a first tooth portion 20, and the first tooth portion 20 is There is a first side end surface 21 at the end, and a first side edge 22 is provided at the end of the first side end surface. 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 blade tooth portion 30, the second blade tooth portion is provided with a second side end surface 31, and a second side edge 32 is provided at the end of the second side end surface. 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.

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

Example 4

A minimally invasive planer 1 includes an inner tube 2 and an outer tube 3. The inner tube is sleeved inside the outer tube. It is characterized in that the inner tube 2 includes a first tooth portion 20, and the first tooth portion 20 is There is a first side end surface 21 at the end, and a first side edge 22 is provided at the end of the first side end surface. 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 blade tooth portion 30, the second blade tooth portion is provided with a second side end surface 31, and a second side edge 32 is provided at the end of the second side end surface. 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 present invention, the angle of the first side edge and the angle of the second side edge of the minimally invasive planer are processed to 75°. The resection process is closer to the shearing effect and more similar to scissors, which avoids tissue tearing during the operation and reduces the risk of secondary mechanical damage. The incidence rate has been improved, the original resection method has been improved, the performance of the planer has been improved, and the quality of surgery has been improved.

Further, the inner tube is a hollow tube body.

Further, the outer tube is a hollow tube body.

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

Example 5

A minimally invasive planer 1 includes an inner tube 2 and an outer tube 3. The inner tube is sleeved inside the outer tube. It is characterized in that the inner tube 2 includes a first tooth portion 20, and the first tooth portion 20 is There is a first side end surface 21 at the end, and a first side edge 22 is provided at the end of the first side end surface. 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 60 °.

Further, the outer tube 3 includes a second blade tooth portion 30, the second blade tooth portion is provided with a second side end surface 31, and a second side edge 32 is provided at the end of the second side end surface. 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.

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

Example 6

A minimally invasive planer 1 includes an inner tube 2 and an outer tube 3. The inner tube is sleeved inside the outer tube. It is characterized in that the inner tube 2 includes a first tooth portion 20, and the first tooth portion 20 is There is a first side end surface 21 at the end, and a first side edge 22 is provided at the end of the first side end surface. 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 blade tooth portion 30, the second blade tooth portion is provided with a second side end surface 31, and a second side edge 32 is provided at the end of the second side end surface. 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.

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

Example 7

A minimally invasive planer 1 includes an inner tube 2 and an outer tube 3. The inner tube is sleeved inside the outer tube. It is characterized in that the inner tube 2 includes a first tooth portion 20, and the first tooth portion 20 is There is a first side end surface 21 at the end, and a first side edge 22 is provided at the end of the first side end surface. 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 blade tooth portion 30, the second blade tooth portion is provided with a second side end surface 31, and a second side edge 32 is provided at the end of the second side end surface. 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.

Furthermore, 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-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be regarded as illustrative and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is therefore intended that all claims falling within the claims All changes within the meaning and scope of equivalent elements are included in the present invention.

In addition, it should be understood that although this specification is described in terms of implementations, not each implementation only contains an independent technical solution. This description of the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole. , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art. All technical details that are not described in detail in the present invention can be realized by any existing technology in the field.

Claims (1)

1. A minimally invasive planer, including an inner tube, an outer tube, and a suction and cutting window. The inner tube is sleeved inside the outer tube. The outer tube is a stainless steel outer sheath tube with a diameter of 1.9-5.5mm. The tube is a rotatable hollow inner tube; the minimally invasive planer is connected to the suction device to form a negative pressure in the inner tube window, attracting the tissue to be cut into the cutting window. During the tissue removal process, the rotational movement of the inner tube cutting teeth drives tissue, so that the tissue moves closer to the cutting teeth of the outer tube, and the fixed outer tube penetrates the internal tissue through the cutting teeth to play a certain role in fixing it. The relative rotation of the inner and outer tubes achieves the occlusal resection of the cartilage tissue and meniscus; It is characterized in that the inner tube includes a first tooth portion, the first tooth portion is provided with 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 is connected to the first side end surface. The inner wall of the outer tube forms a first side edge angle; the first side edge angle is 75°; The outer tube includes a second tooth portion, the second tooth portion is provided with a second side end surface, the end of the second side end surface is provided with a second side edge, and the second side end surface forms a shape with the outer wall of the inner tube. The second side edge angle; the second side edge angle is 75°; The inner tube is a hollow tube body; The outer tube is a hollow tube body; The inner tube is free to rotate within the outer tube.