CN106420009B - Tissue morcellator blades and laser therapy devices - Google Patents

Abstract

A tissue morcellator bit and laser treatment device, the tissue morcellator bit comprising: a fixing seat; the outer sheath is of a tubular structure, one end of the outer sheath is connected with the fixing seat, and the pipe wall at the other end of the outer sheath is provided with a knife edge; the inner cutter is rotatably sleeved in the outer sheath and is provided with a first end far away from the fixing seat, and a part of the first end is exposed from the knife edge; the metal wire channel is arranged in parallel with the outer sheath and fixedly connected with the wall of the outer sheath; wherein, be provided with the memory wire in the wire passageway, the memory wire is suitable for from stretching out the bending in the wire passageway and constitute the protection space above the edge of a knife. The tissue grinder cutter head can improve the use safety of the tissue grinder cutter head and avoid secondary injury.

Description

Tissue morcellator blades and laser therapy devices

technical field

The invention relates to the field of medical equipment, in particular to a cutter head of a tissue morcellator and a laser treatment device.

Background technique

Laser is one of the great inventions of mankind in the 20th century, and it is widely used in many fields. The clinical value of low-intensity laser irradiation therapy has been affirmed at home and abroad. Mainly used in the treatment of brain diseases, cardiovascular diseases, diabetes, malignant tumors, leukemia, psychiatric diseases, psoriasis, rhinitis and other diseases. According to the discovery of health medicine, low-intensity laser has a good curative effect in the early prevention of cardiovascular and cerebrovascular diseases and the recovery period after the onset, and has a certain effect on health and inhibition of human aging. In addition, laser technology is also widely used in biochemical testing, blood analysis, etc., and high-power lasers can also be used in surgical operations.

In surgery, the high-energy pulsed laser generated by the laser is transmitted through the optical fiber, and then the optical fiber enters the human body through the endoscope, and the energy of the laser is transmitted to the part that needs laser treatment. Small heat-affected area and other characteristics, effective and safe treatment for patients.

After using the laser to excise the tissue of the part requiring laser treatment, it is necessary to use a tissue morcellator blade to excrete the excised tissue from the body. However, the cutter head of the tissue morcellator provided by the prior art is likely to cause secondary injury to the patient.

Contents of the invention

The problem to be solved by the present invention is to provide a tissue morcellator cutter head and a laser treatment device, so as to improve the operation safety and avoid secondary damage to the human body.

In order to solve the above problems, the present invention provides a tissue morcellator cutter head, comprising: a fixed seat; an outer sheath, the outer sheath is a tubular structure, one end is connected with the fixed seat, and the tube wall at the other end has a knife edge; The knife is rotatably set in the outer sheath, the inner knife has a first end far away from the fixed seat, and a part of the first end is exposed from the knife edge; the wire channel is connected with the outer sheath It is arranged in parallel and fixedly connected with the wall of the outer sheath; wherein, a memory wire is arranged in the wire channel, and the memory wire is suitable for stretching out from the wire channel and bending above the knife edge constitute a protective space

Optionally, the wire channel includes at least one wire channel tube, wherein each wire channel tube is provided with a memory wire; and the wire channel is provided between the outer sheath tube wall and the knife edge relative position.

Optionally, the number of the wire channel tubes is three.

Optionally, the positions of the three wire channel tubes meet: one of the wire channel tubes is set at the position where the outer sheath tube wall is opposite to the knife edge, as an intermediate wire channel tube; the other two wire channel tubes The channel tubes are respectively arranged on opposite sides of the middle wire channel tube.

Optionally, on a section perpendicular to the axis of the sheath, the distance between the line connecting the center of the sheath to the center of the middle wire channel tube and the line connecting the center of the sheath to the centers of other wire channel tubes The included angle ranges from 40° to 45°.

Optionally, when the memory wire forms a protective space above the knife edge, the length of the protective space is greater than or equal to the length of the knife edge along the extension direction of the outer sheath.

Optionally, the memory wire is also suitable for shrinking and being arranged in the wire channel.

Optionally, the material of the wire channel is metal; the material of the outer sheath is metal.

Optionally, the wire channel is connected to the outer sheath by welding; or, the wire channel is integrated with the outer sheath.

Optionally, the wire channel has a protruding end away from the fixing seat; the end of the sheath provided with a knife edge is the operating end; along the extending direction of the sheath, the protruding end is located at the Between the operating end and the fixed seat.

Optionally, in the extending direction along the outer sheath, the distance between the extending end and the operating end is within a range of 3 mm to 5 mm.

Optionally, the inner cutter has a second end opposite to the first end, and the inner cutter realizes the rotation in the outer sheath under the control of the motor; the second end of the inner cutter A motor connection port is provided for realizing the connection between the inner cutter and the motor.

Optionally, the peripheral surface of the first end of the inner cutter includes an operating area provided with a crushing blade and a closed area not provided with a crushing blade.

The present invention also provides a laser treatment, including the tissue morcellator cutter head provided above.

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

In the technical solution of the cutter head of the tissue morcellator provided by the present invention, in addition to including the fixed base, the outer sheath and the inner cutter, it also has a wire channel arranged in parallel with the outer sheath and fixedly connected with the wall of the outer sheath , wherein, a memory wire is provided in the wire channel, and the memory wire is suitable for stretching out from the wire channel and forming a protective space above the knife edge; when the tissue morcellator cutter head During use, the protection space isolates the knife edge from healthy tissue, preventing the knife edge from being adsorbed to healthy tissue, thereby preventing the tissue morcellator knife head from causing damage to healthy tissue, and improving the safety of use.

In an optional solution, the wire channel includes three wire channel tubes, and the positions of the three wire channel tubes meet: one of the wire channel tubes is arranged on the outer sheath tube wall opposite to the knife edge position, as the middle wire channel tube; the other two wire channel tubes are respectively arranged on opposite sides of the middle wire channel tube. By adopting the position setting of the wire channel tube and the knife edge, the formed protection space can be enlarged, thereby increasing the protected healthy tissue area, and further reducing the probability of the knife edge being adsorbed to the healthy tissue.

Description of drawings

FIG. 1 is a schematic structural view of a tissue morcellator cutter head provided by an embodiment of the present invention;

Fig. 2 is a partially enlarged schematic diagram of the first end in Fig. 1;

Fig. 3 is a top view structural diagram along the direction A in Fig. 2;

Fig. 4 is a schematic cross-sectional structure diagram along line BB1 in Fig. 1;

FIG. 5 is a schematic diagram of the three-dimensional structure of the first end of the memory wire forming the protection space in FIG. 1 .

Detailed ways

It can be seen from the background art that the cutter head of the tissue morcellator provided by the prior art is likely to cause secondary injury to the patient.

Combining with a kind of laser surgery process of enucleation of benign prostatic hyperplasia, we will analyze the reasons why it is easy to cause secondary harm to patients:

In laser surgery for enucleation of benign prostatic hyperplasia, first use the laser operating handle with an endoscope to cut off the prostatic hyperplasia tissue with laser; then rely on external negative pressure to expel the excised tissue from the body.

Specifically, the principle of expelling tissue from the body includes: the tissue morcellator consists of a rotating hollow inner cutter and a fixed outer sheath. When entering the cutting environment, the hollow part of the inner cutter is connected to negative pressure, and the cutter mouth is brought close to the tissue to be pulverized; after the negative pressure is turned on and adsorbed to the tissue, the cutter is turned on again, so that the inner cutter and the outer sheath rotate relatively, thereby Crush the cut tissue.

Since the bladder needs to be filled with water and maintain a certain pressure when the tissue morcellator is in use, if the tool is too close to the bladder wall when the negative pressure is turned on, it may be adsorbed to the bladder wall and cause damage. In addition, during the use of the tissue morcellator, when the absorbed tissue is pulverized, the negative pressure that is still open may still be adsorbed to the bladder wall. In this case, the rotating inner cutter will cause serious damage to the bladder wall. damage.

Therefore, the tissue morcellator has the risk of being adsorbed to the bladder wall during use, which easily causes secondary injury to the patient.

In order to solve the above problems, the present invention provides a tissue morcellator cutter head, comprising: a fixed seat; an outer sheath, the outer sheath is a tubular structure, one end is connected with the fixed seat, and the tube wall at the other end has a knife edge; The knife is rotatably set in the outer sheath, the inner knife has a first end far away from the fixed seat, and a part of the first end is exposed from the knife edge; the wire channel is connected with the outer sheath It is arranged in parallel and fixedly connected with the wall of the outer sheath; wherein, a memory wire is arranged in the wire channel, and the memory wire is suitable for stretching out from the wire channel and bending above the knife edge constitute a protective space.

The cutter head of the tissue morcellator provided by the invention can improve the safety in use and avoid secondary injury to the patient.

In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Fig. 1 shows a schematic structural diagram of a tissue morcellator blade provided by an embodiment of the present invention.

With reference to Fig. 1, described tissue morcellator cutter head comprises:

Fixing seat 100; outer sheath 110, the outer sheath 110 is a tubular structure, one end is connected to the fixing seat 100, and the tube wall at the other end has a knife edge 111; the inner cutter 120 is rotatably set on the outer sheath 110 Inside, the inner cutter 120 has a first end far away from the fixed seat 100 (as shown in 121 in Figure 1), a part of the first end is exposed by the knife edge 111; the wire channel, and the The outer sheath 110 is arranged in parallel and fixedly connected with the tube wall of the outer sheath 110; wherein, a memory wire 131 is arranged in the wire channel, and the memory metal wire 131 is suitable for stretching out from the wire channel and bending And a protective space is formed above the knife edge 111 .

Specifically, with reference to Figures 2 to 5, Figure 2 is a partially enlarged schematic diagram of the first end in Figure 1; Figure 3 is a schematic top view of the structure along the direction A in Figure 2; Figure 4 is a section along the BB1 line in Figure 1 Schematic diagram of the structure; FIG. 5 is a schematic diagram of the three-dimensional structure of the first end of the memory wire in FIG. 1 when the protection space is formed.

In this embodiment, the fixing seat 100 may be an outer sheath seat for fixing, and the material of the fixing seat 100 is metal, such as medical stainless steel.

Specifically, the fixing seat 100 is a cylinder. The fixing seat 100 includes a first end face 101 and a second end face 102 oppositely arranged along the axis, the first end face 101 is used for connecting with the outer sheath 110, and the second end face 102 is used for connecting with an endoscope (not marked ) connected.

It should be noted that, in this embodiment, the fixing base 100 may be a hollow shell structure, and the fixing base 100 may also be a solid structure.

The outer sheath 110 is used to provide a surgical pathway space.

The outer sheath 110 is a hollow tubular structure. During the operation, the lumen of the outer sheath 110 is the path space of the operation. In this embodiment, the material of the outer sheath 110 is metal, such as medical stainless steel.

The outer sheath 110 is connected to the first end surface 101 of the fixing seat 110 . In this embodiment, the fixing base 100 is a hollow shell structure, and the lumen of the outer sheath 110 is connected to the inner cavity of the fixing base 100 . In other embodiments, when the fixing seat is a solid structure, the outer sheath passes through the fixing seat along a direction from the first end surface to the second end surface, and forms a through hole in the fixing seat.

The knife edge 111 is used to penetrate the tube wall of the outer sheath 110 , so as to communicate with the lumen of the outer sheath 110 and expose the inner knife 120 inside the outer sheath 110 .

The inner cutter 120 is rotatably set in the outer sheath 110 , and enters the human body through the operation path formed by the outer sheath 110 to perform pulverization. In this embodiment, the material of the inner cutter 120 is also metal, such as medical stainless steel.

In this embodiment, the inner cutter 120 is a rod-shaped structure with a circular cross section, so the inner cutter 120 can rotate around its axis, so that the inner cutter 120 and the outer sheath 110 are relatively rotated.

The inner cutter 120 includes a first end away from the fixing seat 100 and a second end opposite to the first end.

The peripheral surface of the first end includes an operating area 122 provided with a crushing blade and a closed area not provided with a crushing blade.

The operating field 122 is used to comminute tissue during surgery. In this embodiment, the tissue morcellator is used in the operation of removing hyperplasia of the prostate gland, and the inner cutter 120 is a planer head, as shown in Figures 2 and 3, on the operating area 122 of the inner cutter 120 A crushing blade with a sawtooth structure is provided.

It should be noted that, in other embodiments, the inner cutter can also be an inner cutter with other structures suitable for being placed in the outer sheath, that is to say, a crushing blade with other structures can also be provided on the operating area.

The operation area 122 needs to be exposed so as to directly contact with the cut tissue to achieve pulverization; therefore, the position of the operation area 122 corresponds to the position of the knife edge 111, so that the operation area 122 can be removed from the The knife edge 111 is exposed.

The inner cutter 120 is a hollow structure. During the pulverization process, the inner cutter 120 is connected to the drainage bottle, and the drainage bottle forms a negative pressure environment near the knife edge 111 through the inner knife 120, so that the cut hyperplastic tissue is adsorbed to the knife edge 111. The inner cutter 120 can rotate in the outer sheath 110, so that the operation area 122 interacts with the knife edge 111, and the crushing blade and the knife edge 111 cooperate with each other and are adsorbed on the knife edge 111 The proliferative tissue above is sheared, so as to achieve the purpose of crushing the proliferative tissue.

The outer diameter of the inner cutter 120 and the inner diameter of the outer sheath 110 need to cooperate with each other, so that the inner cutter 120 can be rotated in the outer sheath 110, and the inner cutter 120 can rotate , the operating area 122 and the knife edge 111 can cut hyperplastic tissue.

The closed area is used to close the knife edge 111 .

In this embodiment, the surrounding surface of the closed area is a smooth surface, and when the cutter head of the tissue morcellator enters the human body, the inner knife 120 is rotated so that the closed area is exposed from the knife edge 111, The outer sheath 110 is used to cover the operating area 122, reducing the chance of cutting healthy tissues when the cutter head of the tissue morcellator enters the human body.

The inner cutter 120 has a second end opposite the first end. In a direction along the first end surface 101 to the second end surface 102 , the second end of the inner cutter 120 passes through the fixing seat 100 . In this embodiment, the second end of the inner cutter 120 protrudes from the second end surface 102 of the fixing seat 100 .

It should be noted that, in this embodiment, the inner cutter 120 is rotated under the control of the motor. Therefore, the second end of the inner cutter 120 is provided with a motor connection port for realizing the connection between the inner cutter 120 and the motor.

The wire channel is used to provide a path space for the memory wire 131, and is also used to fix the memory wire 131 during use, so as to prevent the memory wire 131 from shaking too much during the use of the tissue morcellator.

A memory wire 131 is disposed in the wire channel. Referring to FIG. 5 , the memory wire 131 is adapted to protrude from the wire channel and form a protective space above the knife edge 111 .

Specifically, before the inner cutter 120 reaches the tissue to be pulverized, the memory wire 131 is shrunk and arranged in the wire channel, so as to prevent the memory wire 131 protruding out of the wire channel from causing scratches to healthy tissues .

During the operation, when the inner knife 120 reaches the tissue to be pulverized and absorbs the tissue to be pulverized, the memory wire 131 stretches out from the wire channel and bends to form a protection above the knife edge 111. The space between the knife edge 111 and the healthy tissue is isolated by the protective space, thereby isolating the knife edge 111 from the healthy tissue and reducing the risk of the inner knife 120 being adsorbed to the healthy tissue.

In this embodiment, the tissue morcellator cutter head is used in the operation of removing prostatic hyperplasia. During the process of crushing tissue, the memory wire 131 forms a protective space above the knife edge 111. Therefore, even if the When the pressure environment exists, the protective space can isolate the knife edge 111 from the bladder wall, thereby preventing the inner knife 120 from being adsorbed to the bladder wall and preventing the bladder wall from being damaged.

Therefore, the memory wire 131 located in the wire channel forms a protective space above the knife edge 111, which avoids damage to healthy tissue caused by the inner knife 120 during the operation, and reduces secondary damage caused by the operation.

It should be noted that the wire channel not only needs to be fitted with the memory wire 131, but also needs to control the movement of the memory wire 131, so as to minimize the shaking of the memory wire 131 in the wire channel . Therefore, the inner diameter of the wire channel and the size of the memory wire 131 set therein need to cooperate with each other, so as to improve the operation accuracy and reduce the operation risk.

In this embodiment, the material of the wire channel is metal, such as medical stainless steel. The wire channel can be fixedly connected with the outer sheath 110 by welding.

It should be noted that, in other embodiments, the wire channel and the outer sheath can also be integrated, thereby reducing gaps in the structure of the tissue morcellator cutter head, reducing the difficulty of disinfection, and reducing the risk of use.

The wire channel includes at least one wire channel tube 130 , wherein each wire channel tube 130 is provided with a memory wire 131 . Moreover, the wire channel is arranged at the position where the tube wall of the outer sheath 110 is opposite to the knife edge 111, and its benefits include:

Since the knife edge 111 of the cutter head of the tissue morcellator is in a negative pressure environment during operation, the knife edge 111 can absorb the cut tissue to achieve comminution. But the existence of the negative pressure environment may also make the knife edge 111 adsorb to healthy tissues. For example, in this embodiment, the tissue morcellator cutter head is used in the operation to remove benign prostatic hyperplasia, and the blade edge 111 may be adsorbed to the bladder wall; when a negative pressure environment exists, even if a closed area is exposed, the Adsorption of the incision 111 to the healthy tissue may also damage the healthy tissue, causing surgical risks.

In this embodiment, since the wire channel is arranged at the position where the tube wall of the outer sheath 110 is opposite to the knife edge 111, when the memory wire 131 in the wire channel bends to form a protective space, the The protection space can be located just above the incision 111, so that there is enough protection space between the incision 111 and healthy tissue, significantly reducing the probability of the incision 111 damaging healthy tissue, and improving the safety of the operation.

In this embodiment, the number of the wire passage tubes 131 is three. Correspondingly, when the memory wires 131 form a protection space above the knife edge 111, the number of memory wires 131 forming the protection space for three. The size of the protective space formed by the three memory wires 131 is moderate, and the protection effect on the healthy tissue around the incision 111 is good; and the interference between the memory wires 131 is small, and each memory wire 131 It can be deformed normally without being interfered by other memory metal wires 131. Specifically, the memory metal wire 131 can normally shrink into the metal channel tube 130 without interference, and can also be normally undisturbed from The metal passage tube 130 protrudes and bends to form a protective space above the knife edge 111 .

Referring to FIG. 4 , in this embodiment, in order to further improve the isolation effect of the protective space isolation knife edge 111 and healthy tissue, the positions of the three wire channel tubes 130 meet: one of the wire channel tubes 130 is set on the The position where the wall of the outer sheath 110 is opposite to the knife edge 111 is used as an intermediate wire channel tube; the other two wire channel tubes 130 are respectively arranged on opposite sides of the intermediate wire channel tube 130 .

Therefore, when the memory wire 131 protrudes from the wire passage tube 130 and bends to form a protective space above the knife edge 111 , a memory wire 131 in the protective space is just positioned at the knife edge 111 Directly above, as the middle memory wire, the other two memory wires 131 are respectively located on opposite sides of the middle memory wire, so as to ensure that the protection space has a good protective effect on healthy tissues.

It can also be considered that the wire channel formed by the above three wire channel tubes 130 is located at the position where the tube wall of the outer sheath 110 is opposite to the knife edge 111 .

It should also be noted that, in this embodiment, the number of the wire channel tubes 130 is three, and on a section perpendicular to the axis of the outer sheath 110, the distance from the center of the outer sheath 110 to the center of the middle wire channel tube is The included angle α between the connecting line and the connecting line from the center of the outer sheath 110 to the center of other wire channel tubes should not be too small or too large.

If the included angle α is too small, when the memory wire 131 protrudes from the wire channel tube 130 and bends to form a protective space on the incision 111, the protective space can isolate healthy tissue The area is small, so that the area of healthy tissue protected by the protection space is limited; if the angle α is too large, the distance between two adjacent memory wires 131 in the protection space is also relatively small. If the size of the protective space is too large, the support capacity of the protective space to the healthy tissue is insufficient, and the healthy tissue is easily absorbed from the gap between the adjacent memory wires 131 to the incision 111, thereby causing damage to the healthy tissue.

For this reason, in this embodiment, on a section perpendicular to the axis of the outer sheath 110, the line connecting the center of the outer sheath 110 to the center of the middle wire channel tube 130 is the same as the center of the outer sheath 110 to other wire channels. The angle α between the lines connecting the tube centers is in the range of 40°-45°.

In addition, in order to further ensure the protective effect of the protective space on healthy tissues, when the memory wire 131 forms a protective space above the incision 111 , in the extending direction of the outer sheath 110 , the The length of the protection space is greater than or equal to the length of the knife edge 111 .

It should be noted that, in other embodiments, the number of the wire channel tubes may be 1 or any other number.

The wire channel has an extending end away from the fixing seat 100; the end of the outer sheath 110 provided with a knife edge 111 is the operating end; along the extending direction of the outer sheath 110, the extending end is located at the Between the operating end and the fixed seat 100 . Therefore, when the outer sheath 110 enters the human body, the first end of the outer sheath 110 enters the human body earlier than the protruding end of the wire channel, which can reduce the distance between the wire channel and human tissue. Direct contact prevents the protruding end of the wire channel from causing damage to human tissue and reduces surgical risks.

In the extending direction of the outer sheath 110 , the distance between the extending end and the operating end should neither be too large nor too small.

If the distance between the protruding end and the operating end is too large, the memory wire 131 needs to protrude from the wire channel tube 130 during the operation. If the distance between the protruding end and the operating end is too small, the end of the wire channel tube 130 is too close to the end of the outer sheath 110, and the The end of the wire channel tube 130 may come into contact with healthy tissue during the process of entering the human body and during the cutting and crushing operation, thereby increasing the possibility of damage to the healthy tissue and increasing the risk of the operation.

For this reason, in this embodiment, in the extending direction along the outer sheath 110 , the distance between the extending end and the operating end is in the range of 3mm˜5mm.

In the technical solution of the cutter head of the tissue morcellator provided by the embodiment of the present invention, the outer sheath tube wall is provided with a wire channel, and the metal wire channel is provided with a memory wire, and the memory wire is suitable for removing from the The metal wire channel protrudes and bends and forms a protection space above the knife edge. The protection space can isolate the knife edge from the healthy tissue during the process of absorbing the tissue to be pulverized or after absorbing the tissue to be pulverized, and reduce the adsorption of the knife edge to the healthy tissue. risk. In addition, the memory metal wire has the ability to restore the original shape, so when there is no need to form a protective space above the knife edge, the memory metal wire is located in the wire channel to avoid the memory sticking out of the metal channel. The wire causes damage to healthy tissue.

Correspondingly, the present invention also provides a laser treatment device: comprising the tissue morcellator cutter head provided above.

The laser treatment device also includes a laser cutter, which is used to cut the tissue to be removed; when the tissue to be removed is cut, the tissue morcellator cutter head will cut the tissue Crush and excrete from the body.

In this embodiment, the laser treatment device is used in surgical treatment in urology, ENT, dermatology, gynecology and other departments.

During surgical treatment, before the tissue morcellator cutter head comminutes the excised tissue, the memory metal wire can be stretched into the metal channel to prevent the memory wire from causing damage to healthy tissue; After the cutter head of the tissue morcellator is adsorbed to the excised tissue, or when the cutter head of the tissue morcellator is in a negative pressure environment, the memory wire protrudes from the metal channel and bends to form a protection above the knife edge. The protective space can isolate healthy tissue from the incision, reduce the probability of healthy tissue being damaged by the incision, reduce secondary damage to the human body, and improve surgical safety.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention should be based on the scope defined in the claims.

Claims (12)

1. A tissue morcellator bit, comprising:

a fixing seat;

the outer sheath is of a tubular structure, one end of the outer sheath is connected with the fixing seat, and the pipe wall at the other end of the outer sheath is provided with a knife edge;

the inner cutter is rotatably sleeved in the outer sheath and is provided with a first end far away from the fixing seat, and a part of the first end is exposed from the knife edge;

the metal wire channels are arranged in parallel with the outer sheath and fixedly connected with the wall of the outer sheath, and comprise at least one metal wire channel tube, wherein a memory metal wire is arranged in each metal wire channel tube; the metal wire channels are arranged at the positions of the outer sheath tube wall and the knife edge, and the number of the metal wire channel tubes is three;

wherein, be provided with the memory wire in the wire passageway, the memory wire is suitable for from in the wire passageway stretches out and towards the knife edge top bending is in order to constitute the protection space.

2. The tissue morcellator bit of claim 1, wherein the three wire channel tubes are positioned to: one of the metal wire channel pipes is arranged at the position of the outer sheath pipe wall opposite to the knife edge and is used as an intermediate metal wire channel pipe; the other two metal wire channel pipes are respectively arranged at two opposite sides of the middle metal wire channel pipe.

3. The tissue morcellator blade of claim 2, wherein the angle between the line from the center of the sheath to the center of the intermediate wire channel tube and the line from the center of the sheath to the center of the other wire channel tubes is in the range of 40 ° to 45 ° in a cross section perpendicular to the axis of the sheath.

4. The tissue morcellator blade of claim 1, wherein the memory wire forms a protective space above the blade, the protective space having a length greater than or equal to a length of the blade along the extension of the sheath.

5. The tissue morcellator bit of claim 1, wherein the memory wire is further adapted to be retractably disposed within the wire channel.

6. The tissue morcellator bit of claim 1, wherein the wire channel material is metal; the material of the sheath is metal.

7. The tissue morcellator bit of claim 1, wherein the wire channel is welded to the sheath; alternatively, the wire channel is of unitary construction with the outer sheath.

8. The tissue morcellator bit of claim 1, wherein the wire channel has an extended end distal from the anchor; the end of the outer sheath, which is provided with the knife edge, is an operation end;

along the extending direction of the sheath, the extending end is positioned between the operating end and the fixing seat.

9. The tissue morcellator blade of claim 8, wherein the distance between the protruding end and the operating end is in the range of 3mm to 5mm in a direction extending along the sheath.

10. The tissue morcellator bit of claim 1, wherein the inner cutter has a second end opposite the first end, and wherein the inner cutter effects rotation within the outer sheath under control of a motor;

and a motor connecting port is arranged at the second end of the inner cutter and is used for realizing the connection between the inner cutter and a motor.

11. The tissue morcellator bit of claim 1, wherein the peripheral surface of the first end of the inner cutter includes an operative region provided with morcellating edges and an enclosed region not provided with morcellating edges.

12. A laser treatment apparatus, comprising:

a tissue morcellator bit according to any one of claims 1 to 11.