CN206729918U - Expansible, which declines, creates surgical excision tissue extractor for endoscope operation - Google Patents

Abstract

The utility model relates to an expandable minimally invasive surgical resection tissue extractor, which comprises an outer sheath tube, an inner sheath tube and a recovery structure, and is characterized in that the inner sheath tube is arranged in the outer sheath tube, and the inner sheath tube is provided with a recovery structure. The front end of the outer sheath is an expandable part, and the diameter of the front port of the inner sheath is larger than that of the rear port. The recovery structure includes a recovery bag, a recovery line, and the recovery line is connected to the edge of the recovery bag to control the opening and closing of the recovery bag. The large-diameter part of the front end of the inner sheath, the large-diameter part of the inner sheath corresponds to the position of the expandable part of the front end of the outer sheath, and an endoscope is also arranged in the outer sheath, and the endoscope is arranged at the larger part of the inner sheath. rear end. When in use, the recovery structure and endoscope are introduced into the body through the outer sheath. After the recovery structure is opened, the front end of the outer sheath can be opened, and the endoscope can be introduced into the operation through the expandable part of the outer sheath. parts. The extractor can realize the introduction of the recovery structure and the endoscope through an opening.

Description

Expandable minimally invasive surgical resection tissue extractor

technical field

The utility model belongs to the technical field of medical instruments used in minimally invasive surgery, in particular to a extractor used in minimally invasive surgery, in particular to an expandable minimally invasive surgery excision tissue extractor.

Background technique

Minimally invasive surgery is to send special instruments, physical energy or chemical agents into the human body through minimal trauma or a small approach to complete surgical operations such as inactivation, resection, repair or reconstruction of lesions, deformities, and trauma in the human body. Branch of medical science for therapeutic purposes characterized by significantly less trauma to the patient than corresponding conventional surgical procedures.

Endoscopic surgery is a minimally invasive surgery done through small incisions. This type of surgery has small incisions, less postoperative pain, and faster recovery, so it has been more and more widely used. Taking out surgically resected biological tissues through small incisions is a difficult problem encountered in the further development of endoscopic surgery; especially when resecting fluid-filled tissues or malignant tumor tissues, residual fragments or overflowing fluid in the body can easily lead to infection, Complications arise, endangering other healthy tissues. In order to solve the difficult problem of taking out the surgically resected biological tissue through a small incision, various surgical instruments for taking out the resected biological tissue have been developed at home and abroad.

At present, the clinically used surgical instruments for removing resected biological tissues are mainly commercially available minimally invasive surgical excision tissue extractors. The large caliber of the recovery bag part cannot ensure that the recovery bag part and the endoscope exist in the sheath at the same time, so the recovery structure cannot be used with the endoscope at the same time. If you want to use the endoscope for observation, you must first withdraw the recovery structure and operate Complicated, troublesome, time-consuming and labor-intensive.

In order to overcome the problem that the endoscope and the recovery structure cannot work at the same time in the prior art, the utility model provides a taker that can accommodate the endoscope and the recovery structure at the same time, specifically an expandable minimally invasive surgical excision tissue taker .

Contents of the invention

In order to overcome the problem that the tissue extractor in the prior art cannot simultaneously perform removal of excised tissue and endoscopic observation, the purpose of this utility model is to provide an expandable minimally invasive surgical excision tissue extractor.

In order to achieve the above object, the utility model adopts the following technical solutions:

An expandable minimally invasive surgical resection tissue extractor, which includes an outer sheath, an inner sheath, and a recovery structure, is characterized in that the inner sheath is arranged in the outer sheath, and the inner sheath is provided with a recovery structure, and the outer sheath The front end of the tube is set as an expandable part, and the front end of the inner sheath is set with a large diameter part. The recovery structure includes a recovery bag, a recovery line, and the recovery line is connected to the edge of the recovery bag to control the opening and closing of the recovery bag. The recovery bag is set at the front end of the inner sheath. For the caliber part, the large-diameter part of the inner sheath corresponds to the expandable front end of the outer sheath, and an endoscope is also arranged in the outer sheath, and the endoscope is arranged at the rear end of the large-diameter part of the inner sheath. The recovery bag is used to recover the tissue removed by minimally invasive surgery and take the tissue out of the body. The setting of the expandable part at the front end of the outer sheath in the above structure can achieve the purpose of setting the endoscope and the recovery structure at the same time, preventing the setting of multiple openings or saving the trouble of repeatedly replacing the endoscope and the recovery structure.

Further, the recovery line is set as a shape memory metal material. The setting of the shape memory metal material can ensure that the recycling bag opens automatically after entering the designated position for tissue recycling.

Further, the outer sheath is provided with a recovery line fixing knob, and the setting of the recovery line fixing button can facilitate the fixing of the recovery line, reduce the labor of the staff and prevent the change of the length of the recovery line during the process.

Further, the diameter of the outer sheath is smaller than the sum of the diameter of the endoscope and the large diameter of the inner sheath. This arrangement can effectively reduce the size of the opening, and can ensure that the endoscope and the inner sheath are arranged in the outer sheath.

Further, the material of the expandable part is an elastic metal material, and a separation port is arranged on it, and the expandable part is connected with the rear end of the outer sheath, and the diameter of the expandable part is the same as that of the rear end of the outer sheath, and can be expanded. A control structure for controlling the opening and closing of the expandable part is arranged on the inner side or the outer side of the opening part. The arrangement of the elastic metal material can ensure the self-opening of the expandable part under the control of the control structure.

Further, the control structure can be set as any structure that can control the opening of the expandable part, wherein the preferred mode is: the control structure includes a ring structure arranged on the inside or outside of the expandable part, and the ring structure is provided with an opening at the separation , a puller wire is arranged in the ring structure, one end of the puller wire is fixed on the ring structure, and one end extends from the ring structure to the end of the outer sheath and then continues to extend a distance from one end. This arrangement can realize effective control on opening and closing of the expandable part. Further, the annular structure is a structure inclined towards the rear end of the outer sheath. The setting of the above-mentioned shaped ring structure can better guide the stretching of the pulling wire.

Alternatively, the control structure includes small holes arranged on both sides of the opening of the expandable part and pulling wires arranged on the small holes, one end of the pulling wires on both sides is arranged in the small hole, and the other end respectively extends to the outer sheath Continue extending one end distance after the end of the tube. The setting of small holes and pulling wires is simple and reasonable.

Alternatively, the control structure includes small holes arranged on both sides of the opening of the expandable part and pulling wires arranged on the small holes, one end of the pulling wires on both sides is arranged in the small hole, the other end merges at the end, and Controlled by the total pulling wire, the other end of the total pulling wire extends to the end of the outer sheath tube and then continues to extend for a distance of one end. The setting of the total pulling wire can be more convenient to operate and reduce the amount of pulling wire. Further, the total length of the combined two pulling ropes can ensure the effective expansion of the expandable part.

Further, a puller wire channel is set on the outer sheath. The setting of the pulling wire channel can make the length control of the pulling wire easier.

Further, the outer sheath tube is also provided with a puller wire fixing twist. The setting of the fixing torque of the pulling wire can make the pulling wire reach a specified length and then be fixed, reducing unnecessary staff labor.

Further, the ends of the outer sheath and the inner sheath are respectively provided with an outer sheath handle and an inner sheath handle. The setting of the hand can better enable the staff to control the entire extractor.

When in use, first put the outer sheath through the minimally invasive opening, then put the inner sheath with recovery structure into the outer sheath, and reach the front end of the outer sheath, then put the endoscope into the outer sheath, and keep it Behind the large diameter part at the front end of the inner sheath. Finally, the recovery bag is released by pulling the recovery line, the expandable part is opened by pulling the pull line, and the endoscope is released, and the operation and tissue recovery are performed under the action of the endoscope. After the operation, the endoscope is withdrawn first, and then the recovery bag is retracted into the inner sheath by pulling the recovery line, and the expandable part is closed by pulling the puller line, and then the endoscope is withdrawn from the outer sheath in turn , the inner sheath, and finally the outer sheath is withdrawn to complete the use of the device.

Advantage and beneficial effect of the utility model:

The setting of the front end of the expandable outer sheath can ensure the simultaneous setting of the endoscope and the recovery structure, and the setting of the ring structure or small hole and the pulling wire can effectively ensure the opening and closing of the expandable part. In short, the structure can be easily It is good to reduce the labor load of the staff, and can effectively reduce the number of minimally invasive openings.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the utility model embodiment 4;

Fig. 2 is the schematic diagram of the perspective structure of the outer sheath of Embodiment 4 of the present utility model;

Fig. 3 is a schematic diagram of the perspective structure of the outer sheath of Embodiment 5 of the present utility model;

Fig. 4 is the utility model sectional structure schematic diagram;

Fig. 5 is a schematic diagram of the perspective structure of the front end of Embodiment 4 of the utility model;

Fig. 6 is a schematic diagram of the perspective structure of the front end of Embodiment 5 of the utility model;

Fig. 7 is a schematic diagram of the back-end structure of the utility model;

In the figure, 1. Outer sheath tube; 11. Expandable part; 111. Separation port; 12. Fixing twist of recovery line; 2. Inner sheath tube; 21. Large diameter part; 31. Recovery bag; 32. Recovery line; 4. Endoscope; 51. Ring structure; 52. Pulling wire; 53. Small hole; 54. Total pulling wire; 55. Pulling wire channel; 56. Pulling wire fixing button; 61. Outer sheath Handle; 62, inner sheath pipe handle.

detailed description

The utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments, and the following embodiments are only used to illustrate the utility model and not to limit the scope of the utility model.

Embodiment 1 expandable minimally invasive surgical resection tissue extractor

An expandable minimally invasive surgical resection tissue extractor includes an outer sheath tube 1, an inner sheath tube 2, and a recovery structure, and is characterized in that the inner sheath tube 2 is arranged in the outer sheath tube 1, and the inner sheath tube 2 is provided with a recovery structure The front end of the outer sheath tube 1 is set as an expandable part 11, and the front end of the inner sheath tube 2 is set as a large-diameter part 21. The recovery structure includes a recovery bag 31, a recovery line 32, and the recovery line 32 is connected to the recovery bag 31 to control the edge of the recovery bag 31. Opening and closing, the recovery bag 31 is arranged on the large-diameter part 21 at the front end of the inner sheath tube 2, and the position of the large-diameter part 21 of the inner sheath tube 2 corresponds to the position of the expandable part 11 at the front end of the outer sheath tube 1, and an endoscope is also arranged in the outer sheath tube 1 4. The endoscope 4 is set at the rear end of the large diameter part 21 of the inner sheath 2 . The recovery wire 32 is configured as a shape memory metal material. The setting of the shape-memory metal material can ensure that the recovery bag 31 opens automatically after entering the designated position for tissue recovery. The recovery line fixed twist 12 is set outside the outer sheath, and the setting of the recovery line 32 fixed button can facilitate the fixing of the recovery line 32, reduce the labor of the staff and prevent the change of the recovery line 32 length in the process. The caliber of the outer sheath tube 1 is smaller than the sum of the caliber of the endoscope 4 and the large caliber of the inner sheath tube 2 . The material of the expandable part 11 is an elastic metal material, and a separation port 111 is arranged on it. The expandable part 11 is connected to the rear end of the outer sheath tube 1. The diameter of the expandable part 11 is the same as that of the outer sheath tube 1 rear end, and A control structure for controlling the opening and closing of the expandable portion 11 is provided on the inside or outside of the expandable portion 11 .

The control structure includes a ring structure 51 arranged on the inside or outside of the expandable part 11. The ring structure is provided with an opening at the separation point, and a pulling wire 52 is arranged in the ring structure 51, and one end of the pulling wire 52 is fixed to the ring structure. On the top, one end protrudes from the ring structure and extends to the end of the outer sheath tube 1 and then continues to extend a distance from one end. This arrangement can realize effective control of the opening and closing of the expandable part 11 . The annular structure 51 is a structure inclined towards the rear end of the outer sheath 1 . The setting of the shape ring structure 51 can better guide the stretching of the pulling wire 52 . A pulling wire fixing button 56 is also arranged on the outer sheath 1 , and an outer sheath handle 61 and an inner sheath handle 62 are respectively arranged at the ends of the outer sheath 1 and the inner sheath 2 . The setting of the hand can better enable the staff to control the entire extractor.

When in use, the outer sheath tube 1 is first inserted through the minimally invasive opening, and then the inner sheath tube 2 with a recovery structure is placed into the outer sheath tube 1 and reaches the front end of the outer sheath tube 1, and then the endoscope 4 is placed into the Inside the outer sheath tube 1 and kept behind the large diameter part 21 at the front end of the inner sheath tube 2 . Afterwards, the recovery bag 31 is released by pulling the recovery line 32, and the expandable part 11 is opened by pulling the pulling line 52, and the endoscope 4 is released, and the operation and tissue recovery are performed under the action of the endoscope 4. After the operation, the endoscope 4 is retracted first, and then the recovery bag 31 is retracted into the inner sheath tube 2 by pulling the recovery line 32, and the expandable part 11 is closed by pulling the pull line 52, and then the outer sheath tube In step 1, the endoscope 4 and the inner sheath 2 are withdrawn, and finally the outer sheath 1 is withdrawn to complete the use of the device.

Embodiment 2 expandable minimally invasive surgical resection tissue extractor

An expandable minimally invasive surgical resection tissue extractor includes an outer sheath tube 1, an inner sheath tube 2, and a recovery structure, and is characterized in that the inner sheath tube 2 is arranged in the outer sheath tube 1, and the inner sheath tube 2 is provided with a recovery structure The front end of the outer sheath tube 1 is set as an expandable part 11, and the front end of the inner sheath tube 2 is set as a large-diameter part 21. The recovery structure includes a recovery bag 31, a recovery line 32, and the recovery line 32 is connected to the recovery bag 31 to control the edge of the recovery bag 31. Opening and closing, the recovery bag 31 is arranged on the large-diameter part 21 at the front end of the inner sheath tube 2, and the position of the large-diameter part 21 of the inner sheath tube 2 corresponds to the position of the expandable part 11 at the front end of the outer sheath tube 1, and an endoscope is also arranged in the outer sheath tube 1 4. The endoscope 4 is set at the rear end of the large diameter part 21 of the inner sheath 2 . The recovery wire 32 is configured as a shape memory metal material. The setting of the shape-memory metal material can ensure that the recovery bag 31 opens automatically after entering the designated position for tissue recovery. The recovery line fixed twist 12 is set outside the outer sheath, and the setting of the recovery line 32 fixed button can facilitate the fixing of the recovery line 32, reduce the labor of the staff and prevent the change of the recovery line 32 length in the process. The caliber of the outer sheath tube 1 is smaller than the sum of the caliber of the endoscope 4 and the large caliber of the inner sheath tube 2 . The material of the expandable part 11 is an elastic metal material, and a separation port 111 is arranged on it. The expandable part 11 is connected to the rear end of the outer sheath tube 1. The diameter of the expandable part 11 is the same as that of the outer sheath tube 1 rear end, and A control structure for controlling the opening and closing of the expandable portion 11 is provided inside the expandable portion 11 .

The control structure includes small holes 53 arranged on both sides of the opening 111 of the expandable part 11 and pulling wires 52 arranged on the small holes 53. One end of the pulling wires 52 on both sides is arranged in the small hole 53, and the other ends extend respectively. After reaching the end of the outer sheath tube 1, continue to extend a distance from one end. The setting of the small hole 53 and the pulling wire 52 is simple and reasonable. Pull wire fixing button 56 is also arranged on the outer sheath tube 1, and outer sheath tube handle 61 and inner sheath tube handle 62 are respectively arranged at the end of outer sheath tube 1 and inner sheath tube 2. The setting of the hand can better enable the staff to control the entire extractor.

Embodiment 3 expandable minimally invasive surgical resection tissue extractor

An expandable minimally invasive surgical resection tissue extractor includes an outer sheath tube 1, an inner sheath tube 2, and a recovery structure, and is characterized in that the inner sheath tube 2 is arranged in the outer sheath tube 1, and the inner sheath tube 2 is provided with a recovery structure The front end of the outer sheath tube 1 is set as an expandable part 11, and the front end of the inner sheath tube 2 is set as a large-diameter part 21. The recovery structure includes a recovery bag 31, a recovery line 32, and the recovery line 32 is connected to the recovery bag 31 to control the edge of the recovery bag 31. Opening and closing, the recovery bag 31 is arranged on the large-diameter part 21 at the front end of the inner sheath tube 2, and the position of the large-diameter part 21 of the inner sheath tube 2 corresponds to the position of the expandable part 11 at the front end of the outer sheath tube 1, and an endoscope is also arranged in the outer sheath tube 1 4. The endoscope 4 is set at the rear end of the large diameter part 21 of the inner sheath 2 . The recovery wire 32 is configured as a shape memory metal material. The setting of the shape-memory metal material can ensure that the recovery bag 31 opens automatically after entering the designated position for tissue recovery. The recovery line fixed twist 12 is set outside the outer sheath, and the setting of the recovery line 32 fixed button can facilitate the fixing of the recovery line 32, reduce the labor of the staff and prevent the change of the recovery line 32 length in the process. The caliber of the outer sheath tube 1 is smaller than the sum of the caliber of the endoscope 4 and the large caliber of the inner sheath tube 2 . The material of the expandable part 11 is an elastic metal material, and a separation port 111 is arranged on it. The expandable part 11 is connected to the rear end of the outer sheath tube 1. The diameter of the expandable part 11 is the same as that of the outer sheath tube 1 rear end, and A control structure for controlling the opening and closing of the expandable portion 11 is provided inside the expandable portion 11 .

The control structure includes small holes 53 arranged on both sides of the opening 111 of the expandable part 11 and pulling wires 52 arranged on the small holes 53. One end of the pulling wires 52 on both sides is arranged in the small hole 53, and the other end is at the end. Combined and controlled by the total pulling wire 54, the other end of the total pulling wire 54 extends to the end of the outer sheath tube 1 and then continues to extend a distance from one end. The overall setting of the pulling wires 52 can be more convenient to operate and reduce the amount of pulling wires 52 . The total length of the combined two pulling ropes can ensure the effective expansion of the expandable part 11 . A pulling wire fixing button 56 is also arranged on the outer sheath 1 , and an outer sheath handle 61 and an inner sheath handle 62 are respectively arranged at the ends of the outer sheath 1 and the inner sheath 2 . The setting of the hand can better enable the staff to control the entire extractor.

Embodiment 4 expandable minimally invasive surgical resection tissue extractor

An expandable minimally invasive surgical resection tissue extractor includes an outer sheath tube 1, an inner sheath tube 2, and a recovery structure, and is characterized in that the inner sheath tube 2 is arranged in the outer sheath tube 1, and the inner sheath tube 2 is provided with a recovery structure The front end of the outer sheath tube 1 is set as an expandable part 11, and the front end of the inner sheath tube 2 is set as a large-diameter part 21. The recovery structure includes a recovery bag 31, a recovery line 32, and the recovery line 32 is connected to the recovery bag 31 to control the edge of the recovery bag 31. Opening and closing, the recovery bag 31 is arranged on the large-diameter part 21 at the front end of the inner sheath tube 2, and the position of the large-diameter part 21 of the inner sheath tube 2 corresponds to the position of the expandable part 11 at the front end of the outer sheath tube 1, and an endoscope is also arranged in the outer sheath tube 1 4. The endoscope 4 is set at the rear end of the large diameter part 21 of the inner sheath 2 . The recovery wire 32 is configured as a shape memory metal material. The setting of the shape-memory metal material can ensure that the recovery bag 31 opens automatically after entering the designated position for tissue recovery. The recovery line fixed twist 12 is set outside the outer sheath, and the setting of the recovery line 32 fixed button can facilitate the fixing of the recovery line 32, reduce the labor of the staff and prevent the change of the recovery line 32 length in the process. The caliber of the outer sheath tube 1 is smaller than the sum of the caliber of the endoscope 4 and the large caliber of the inner sheath tube 2 . The material of the expandable part 11 is an elastic metal material, and a separation port 111 is arranged on it. The expandable part 11 is connected to the rear end of the outer sheath tube 1. The diameter of the expandable part 11 is the same as that of the outer sheath tube 1 rear end, and A control structure for controlling the opening and closing of the expandable portion 11 is provided inside the expandable portion 11 . The control structure includes small holes 53 arranged on both sides of the opening 111 of the expandable part 11 and pulling wires 52 arranged on the small holes 53. One end of the pulling wires 52 on both sides is arranged in the small hole 53, and the other end is at the end. Combined and controlled by the total pulling wire 54, the other end of the total pulling wire 54 extends to the end of the outer sheath tube 1 and then continues to extend a distance from one end. The overall setting of the pulling wires 52 can be more convenient to operate and reduce the amount of pulling wires 52 . The total length of the combined two pulling ropes can ensure the effective expansion of the expandable part 11 . A puller wire channel 55 is provided on the outer sheath tube 1 . The setting of the pulling wire channel 55 can make the length control of the pulling wire 52 easier. The outer sheath tube 1 is also provided with a pulling wire fixing button 56, and the ends of the outer sheath tube 1 and the inner sheath tube 2 are respectively provided with an outer sheath tube handle 61 and an inner sheath tube handle 62. The setting of the hand can better enable the staff to control the entire extractor.

Embodiment 5 expandable minimally invasive surgical resection tissue extractor

An expandable minimally invasive surgical resection tissue extractor includes an outer sheath tube 1, an inner sheath tube 2, and a recovery structure, and is characterized in that the inner sheath tube 2 is arranged in the outer sheath tube 1, and the inner sheath tube 2 is provided with a recovery structure The front end of the outer sheath tube 1 is set as an expandable part 11, and the front end of the inner sheath tube 2 is set as a large-diameter part 21. The recovery structure includes a recovery bag 31, a recovery line 32, and the recovery line 32 is connected to the recovery bag 31 to control the edge of the recovery bag 31. Opening and closing, the recovery bag 31 is arranged on the large-diameter part 21 at the front end of the inner sheath tube 2, and the position of the large-diameter part 21 of the inner sheath tube 2 corresponds to the position of the expandable part 11 at the front end of the outer sheath tube 1, and an endoscope is also arranged in the outer sheath tube 1 4. The endoscope 4 is set at the rear end of the large diameter part 21 of the inner sheath 2 . The recovery wire 32 is configured as a shape memory metal material. The setting of the shape-memory metal material can ensure that the recovery bag 31 opens automatically after entering the designated position for tissue recovery. The recovery line fixed twist 12 is set outside the outer sheath, and the setting of the recovery line 32 fixed button can facilitate the fixing of the recovery line 32, reduce the labor of the staff and prevent the change of the recovery line 32 length in the process. The caliber of the outer sheath tube 1 is smaller than the sum of the caliber of the endoscope 4 and the large caliber of the inner sheath tube 2 . The material of the expandable part 11 is an elastic metal material, and a separation port 111 is arranged on it. The expandable part 11 is connected to the rear end of the outer sheath tube 1. The diameter of the expandable part 11 is the same as that of the outer sheath tube 1 rear end, and A control structure for controlling the opening and closing of the expandable portion 11 is provided inside the expandable portion 11 . The control structure includes a ring structure 51 arranged on the inside or outside of the expandable part 11. The ring structure is provided with an opening at the separation point, and a pulling wire 52 is arranged in the ring structure 51, and one end of the pulling wire 52 is fixed to the ring structure. On the top, one end protrudes from the ring structure and extends to the end of the outer sheath tube 1 and then continues to extend a distance from one end. This arrangement can realize effective control of the opening and closing of the expandable part 11 . The annular structure 51 is a structure inclined towards the rear end of the outer sheath 1 . The setting of the above-mentioned shape ring structure 51 can better guide the pulling wire 52 to stretch. A puller wire channel 55 is provided on the outer sheath tube 1 . The setting of pulling wire channel 55 can make the length control of pulling wire 52 easier. A pulling wire fixing button 56 is also arranged on the outer sheath 1 , and an outer sheath handle 61 and an inner sheath handle 62 are respectively arranged at the ends of the outer sheath 1 and the inner sheath 2 . The setting of the hand can better enable the staff to control the entire extractor.

The description of the above embodiment is only used to understand the technical solution of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can be made to the utility model, and these improvements and modifications will also fall within the protection scope of the claims of the utility model Inside.

Claims (10)

1. an expandable minimally invasive surgical resection tissue extractor, which comprises an outer sheath (1), an inner sheath (2), and a recovery structure, is characterized in that the inner sheath (2) is arranged on the outer sheath ( 1), a recovery structure is set in the inner sheath (2), the front end of the outer sheath (1) is set as an expandable part (11), and the front end of the inner sheath (2) is set with a large-diameter part (21), and the recovery The structure includes a recovery bag (31), a recovery line (32), the recovery line (32) is connected to the edge of the recovery bag (31) to control the opening and closing of the recovery bag (31), and the recovery bag (31) is arranged on the inner sheath (2) The large-diameter part (21) at the front end, the large-diameter part (21) of the inner sheath (2) corresponds to the position of the expandable part (11) at the front end of the outer sheath (1), and an inner sheath (1) is also provided The speculum (4) and the endoscope (4) are arranged at the rear end of the large diameter part (21) of the inner sheath (2). 2. The minimally invasive surgical resection tissue extractor according to claim 1, characterized in that, the diameter of the outer sheath (1) is less than the sum of the diameter of the endoscope (4) and the large diameter of the inner sheath (2) . 3. The minimally invasive surgical resection tissue extractor according to claim 1, characterized in that, the material of the expandable part (11) is an elastic metal material, on which a separation opening (111) is arranged, and the expandable part (11) is connected to the rear end of the outer sheath (1), the diameter of the expandable part (11) is the same as that of the rear end of the outer sheath (1), and the inside or outside of the expandable part (11) is set to control the expansion Part (11) control structure of opening and closing. 4. The minimally invasive surgery resection tissue extractor according to claim 3, characterized in that the control structure comprises a ring structure (51) arranged on the inside or outside of the expandable part (11), and the ring structure is separated when it is separated. An opening is provided at the ring structure (51), and a pulling wire (52) is arranged in the ring structure (51). One end of the pulling wire (52) is fixed on the ring structure, and one end extends from the ring structure and extends to the outer sheath (1) Continue extending one end distance after the end. 5. The minimally invasive surgical resection tissue extractor according to claim 3, characterized in that, the control structure includes small holes (53) and a setting on both sides of the opening (111) of the expandable part (11). On the puller wire (52) on the small hole (53), one end of the puller wire (52) on both sides is arranged in the small hole (53), and the other end extends to the end of the outer sheath tube (1) and then continues to extend a distance of one end. . 6. The minimally invasive surgical resection tissue extractor according to claim 3, characterized in that, the control structure includes small holes (53) and a setting on both sides of the opening (111) of the expandable part (11). On the puller wire (52) on the small hole (53), one end of the puller wires (52) on both sides is arranged in the small hole (53), and the other end merges at the end, and is controlled by the total puller wire (54), The other end of the total pulling wire (54) extends to the end of the outer sheath tube (1) and continues to extend the distance of one end. 7. The minimally invasive surgery resection tissue extractor according to any one of claims 4-6, characterized in that a pulling wire channel (55) is provided on the outer sheath (1). 8. The minimally invasive surgical resection tissue extractor according to any one of claims 4-6, characterized in that, a puller wire fixing button (56) is also provided on the outer sheath (1). 9. The tissue extractor for minimally invasive surgical resection according to claim 4, characterized in that, the annular structure (51) is a structure inclined towards the rear end of the outer sheath (1). 10. The minimally invasive surgical resection tissue extractor according to claim 1, characterized in that, the outer sheath tube (1) and the inner sheath tube (2) ends are respectively provided with an outer sheath tube handle (61) and an inner sheath tube handle (62).