Object taking bag for taking operation specimen in rectal cancer operation NOSES

Abstract

The invention discloses an object taking bag for taking a surgical specimen through a rectal cancer operation NOSES, and relates to the technical field of taking a specimen through a natural orifice, the object taking bag comprises a main cylinder part, a shaping part and a separating part, so that a lower pull line is matched with a taper hole membrane, after the cylinder membrane is preferentially filled in the front stage of the working process, an inner air hole is opened to inflate an upper ring membrane, and the upper ring membrane is separated from the lower ring membrane; on the basis of the effect of reducing the pneumoperitoneum push-out pressure by opening the conical hole film, the unexpected effect of separating the upper conical film and solving the problem of difficulty in initial opening is achieved through the upper pull wire, and the side pipe film and the upper ring film are matched with the upper pull wire to complete the initial opening effect; and an unexpected technical effect of supporting the cylinder film and the upper ring film is achieved.

Description

Technical Field

[0001] This invention relates to the field of specimen retrieval via natural orifices, specifically to a retrieval bag for retrieval of surgical specimens via NOSES in rectal cancer surgery. Background Technology

[0002] Traditional laparoscopic surgery requires a 3-5 cm incision in the abdominal wall. Compared to traditional laparoscopic surgery, NOSES surgery offers several advantages, including avoiding auxiliary incisions for specimen retrieval, resulting in less trauma; less pain for the patient and significantly reduced use of analgesics; better abdominal wall function; better cosmetic results; faster patient recovery; and a better psychological state. Colorectal cancer is a common malignant tumor, especially rectal cancer, and surgical resection is the most important treatment option for early-stage patients. The retrieval bag is mainly used to remove the resected specimen from the surgical area during thoracoscopic and laparoscopic surgery. Traditional methods involve using medical gloves and a self-adhesive scissor on the laparoscopic protective sleeve to place the resected tissue specimen inside, and then using dissecting forceps to remove the specimen bag from the body. NOSES surgery for rectal cancer is suitable for patients in whom the surgical specimen is generally retrieved through the rectum or vagina.

[0003] For radical resection of rectal cancer, the specimen is about 20cm in length. It can be easily cut using a laparoscopic protective sheath. After applying paraffin oil to the inner and outer layers of the protective sheath, one end is tied and sealed. The trocar is then inserted into the abdominal cavity. The natural cavity is opened, and the sealed end is clamped with an oval forceps and brought out of the body. The end with the suture is left in the abdominal cavity. After removal, the sealed area is cut with surgical scissors, and the intestinal segment of the surgical specimen is clamped and fixed with an oval forceps before being slowly removed. However, the simple homemade retrieval bag is time-consuming during the operation, increasing the operation time. In particular, the protective sheath needs to be passed through a 1.2cm puncture card while it is in a wrinkled state. The sheath structure is flattened to the point that the two sides are tightly attached, like a plastic bag, making the initial opening operation difficult, which exacerbates the operation difficulty under laparoscopy. After opening, due to the pneumoperitoneum environment in the abdominal cavity and the sheath structure located in the middle of the rectal and vaginal incision, the gas will automatically fill the sheath and push it outward, causing the sheath to completely detach from the natural cavity. After opening the closed end of the removed sheath, the entire sheath leaks air, affecting the stability of the pneumoperitoneum environment. Furthermore, the sheath loses its overall shape after losing the thrust of the pneumoperitoneum as only a gas flow channel. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, the present invention provides a retrieval bag for taking surgical specimens via NOSES in rectal cancer surgery.

[0005] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution:

[0006] A retrieval bag for NOSES (Noise, Separation, and Excision) of surgical specimens in rectal cancer surgery includes a main tube, a shaping section, and a separation section. The main tube includes a tube membrane and a bottom membrane, with the bottom membrane fixedly connected to the lower side of the tube membrane and a lower air hole on the bottom membrane. The shaping section includes a side tube membrane, an upper ring membrane, and an upper tube membrane. The side tube membrane is fixedly connected to the side of the tube membrane, an upper conical membrane is fixedly connected to the upper side of the tube membrane, the upper ring membrane is fixedly connected to the upper edge of the upper conical membrane, and an upper tube membrane is fixedly connected between the side tube membrane and the upper ring membrane. The upper tube membrane is fixedly connected to the upper conical membrane.

[0007] The separation section includes an upper pull wire, a lower pull wire, and a lower bundle membrane. The lower bundle membrane is located below the bottom membrane. The lower pull wire is fixedly connected to the lower bundle membrane. The lower pull wire extends into the cylindrical membrane through a lower air hole. An internal air hole is opened at the lower end of the side tube membrane located inside the cylindrical membrane. The lower pull wire extends into the side tube membrane through the internal air hole. An upper pull wire is connected to the upper side of the lower pull wire. The upper pull wire extends into the side tube membrane after passing through the upper tube membrane. The upper end of the upper pull wire is fixedly connected to the inner side of the upper ring membrane.

[0008] Furthermore, a discontinuous connecting ring is fixedly connected between the lower beam membrane and the bottom membrane.

[0009] Furthermore, the bottom membrane is fixedly connected to a conical membrane pointing towards one side of the cylindrical membrane at the lower air hole position. The upper end of the conical membrane has a non-closed structure, and the pull-down wire is slidably connected to the conical membrane.

[0010] Furthermore, the side tube membrane, upper tube membrane, pull-down wire, and conical membrane are provided in two sets, with the side tube membrane located on both sides of the cylindrical membrane and the upper tube membrane located on both sides of the upper conical membrane.

[0011] Furthermore, a positioning membrane is fixedly connected between the two conical membranes.

[0012] Furthermore, a limiting expansion knot is fixedly connected to one end of the upper pull wire near the lower pull wire, and a notched connecting wire is fixedly connected to the lower side of the limiting expansion knot. The lower end of the notched connecting wire is fixedly connected to the lower pull wire, and the notch of the notched connecting wire is on the side away from the lower air hole.

[0013] Furthermore, the pull-up wires corresponding to the two sets of pull-down wires extend in the same direction along the axis of the upper ring membrane within the upper ring membrane, and the extension length of the pull-up wires is 1 / 4 of the length of the upper ring membrane.

[0014] Furthermore, a tensioning wire is slidably connected to the outer edge of the upper ring membrane, with both ends of the tensioning wire extending out of the upper ring membrane.

[0015] Furthermore, the axial length of the upper conical membrane is 10 cm; it facilitates specimen placement and allows the upper ring membrane to be tightened by a binding wire after placement.

[0016] Furthermore, the diameter of the membrane is 8cm and the length of the membrane is 10cm.

[0017] Furthermore, the bottom membrane is provided with an annular groove near the cylindrical membrane, and the bottom membrane is also provided with a breakpoint groove at the annular groove position. The breakpoint grooves are arranged in a ring array on the bottom membrane at the corresponding positions of the annular grooves. After the surgeon uses oval forceps to pull the surgical specimen into the cylindrical membrane through the conical membrane, the bottom membrane is separated from the cylindrical membrane through the annular groove and the breakpoint groove, which facilitates the removal of the specimen from the body.

[0018] Furthermore, the lengths of the cylindrical membrane and the upper conical membrane are in a 1:1 ratio.

[0019] The beneficial effects of this invention are:

[0020] A retrieval bag for NOSES (Noise, Surgery, and Excision) specimen collection in rectal cancer surgery is described. During use, an initially flattened and wrinkled tubular membrane is inserted into the abdominal cavity via a trocar. Inside the abdominal cavity, one end of the lower constrictor membrane is brought out through an anal or vaginal incision. At this point, the upper conical membrane is not yet separated, preventing the pneumoperitoneum gas from entering the tubular membrane and pushing it out of the natural cavity. After the lower end of the tubular membrane is brought out, the lower constrictor membrane is separated using a discontinuous connecting ring. During separation, a pull-down line is pulled, which fills the upper opening of the conical membrane, ensuring that the tubular membrane is fully expanded by the pneumoperitoneum gas without leakage. As the separation of the lower constrictor membrane progresses, the pull-down line moves while simultaneously pulling the upper constrictor membrane. Two upper pull-up sutures move in opposite directions on either side of the upper ring membrane, causing the flattened and adhered upper conical membrane to fold. Gas then fills the tubular membrane through the gaps in the folds and the surrounding pneumoperitoneum environment. When the lower pull-up suture pulls the limiting expansion knot towards the inner pore, the lower pull-up suture is pulled towards the inner pore, while the gap in the notch connecting suture is far from the inner pore. This causes the gap to be pulled more heavily until it breaks off from the lower pull-up suture. At the same time, the gas filling the tubular membrane pushes open the limiting expansion knot through the inner pore to inflate the lateral tubular membrane, upper tubular membrane, and upper ring membrane, making the overall structure of the tubular membrane and upper conical membrane stable, and the upper opening stable, facilitating the surgeon to guide the specimen in.

[0021] After the pull-down suture breaks, the lower convoluted membrane is completely separated, the pull-down suture comes out of the conical membrane, and the gas can also be released from the holes of the conical membrane. This can release some of the outward pressure of the pneumoperitoneum while the bottom membrane acts as a barrier to prevent gas from spreading the tubular membrane and the upper ring membrane, without affecting the stability of the pneumoperitoneum, and can also reduce the force of the pneumoperitoneum pushing the tubular membrane. Then, according to the existing surgical procedure, the upper conical membrane is clamped through the laparoscope, and the forceps are inserted through the conical membrane to pull the specimen into the tubular membrane. The positioning membrane restricts the deformation of the conical membrane, and the forceps are not completely adhered to the forceps when they are inserted.

[0022] After the specimen is dragged into the tubular membrane, the surgeon controls the tension suture with another surgical forceps under laparoscopy in the abdominal cavity. Pulling the tension suture tightens the upper part of the whole, completing the specimen acquisition. When it is necessary to remove the specimen later, the bottom membrane is separated from the tubular membrane through the break point groove, so that the specimen can be removed from the tubular membrane later.

[0023] This design allows the pull-down line to work in conjunction with the conical membrane. In the initial stage of the process, the cylindrical membrane is filled first, and then the inner vent is opened to inflate the upper annular membrane. Subsequently, the opening of the conical membrane reduces the pressure during the pneumatic expulsion process. The pull-down line also achieves the unexpected effect of separating the upper conical membrane to solve the problem of initial opening difficulties. In addition to the side tube membrane and the upper annular membrane working together with the pull-down line to complete the initial opening, the design also provides the unexpected technical effect of supporting the cylindrical membrane and the upper annular membrane.

[0024] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a schematic diagram of the overall structure of the retrieval bag for NOSES surgical specimen retrieval in rectal cancer surgery as described in an embodiment of the present invention;

[0027] Figure 2 This is a front view structural connection diagram of a retrieval bag for NOSES surgical specimen retrieval in rectal cancer surgery, as described in an embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of the lower beam membrane and the breakpoint connecting ring described in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the cylindrical membrane, bottom membrane, side tube membrane, and pull-down cable according to an embodiment of the present invention;

[0030] Figure 5 This is a schematic cross-sectional view of the tubular membrane, lower beam membrane, and upper conical membrane described in an embodiment of the present invention;

[0031] Figure 6 This is a schematic cross-sectional view of the cylindrical membrane, bottom membrane, and side tube membrane described in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of the cylindrical membrane, bottom membrane, side tube membrane, and pull-down cable according to an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the conical membrane and the positioning membrane described in an embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram of the structure of the cylindrical membrane and the bottom membrane according to an embodiment of the present invention;

[0035] Figure 10 This is a schematic diagram of the structure of the pull-down wire, the notch connecting line, the limiting expansion knot, and the pull-up wire as described in an embodiment of the present invention;

[0036] Figure 11 This is a schematic diagram of the structure of the tubular membrane, side tube membrane, upper conical membrane, and upper tubular membrane according to an embodiment of the present invention;

[0037] Figure 12 This is a schematic cross-sectional view of the upper conical membrane and the upper annular membrane described in an embodiment of the present invention;

[0038] Figure 13 This is a schematic diagram of the structure of the pull-down cable and the pull-up cable according to an embodiment of the present invention;

[0039] Figure 14 This is a schematic diagram of the upper conical membrane and upper tubular membrane as described in an embodiment of the present invention;

[0040] Figure 15 This is a schematic diagram of the structure of the upper conical membrane, upper annular membrane, tensioning wire, upper tubular membrane, and upper pull wire according to an embodiment of the present invention;

[0041] Figure 16 This is a schematic diagram of the structure of the cylindrical membrane, bottom membrane, and side tube membrane according to an embodiment of the present invention;

[0042] Figure 17 This is a schematic diagram of the structure of the bottom membrane and the annular groove according to an embodiment of the present invention;

[0043] Figure 18 This is a schematic diagram of the structure of the bottom film and the breakpoint groove according to an embodiment of the present invention;

[0044] Figure 19 This is a schematic diagram of another proportional structure of the cylindrical membrane and the upper conical membrane described in an embodiment of the present invention.

[0045] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0046] 1-Cylindrical membrane, 101-Lower bundle membrane, 102-Break-shaped connecting ring, 110-Bottom membrane, 111-Conical membrane, 112-Positioning membrane, 113-Lower vent, 120-Ring groove, 121-Break groove, 2-Side tube membrane, 201-Inner vent, 210-Pull-down wire, 3-Upper conical membrane, 301-Upper ring membrane, 302-Tightening wire, 310-Upper tube membrane, 311-Notch connecting line, 312-Limiting expansion knot, 313-Pull-up wire. Detailed Implementation

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0048] Example 1

[0049] like Figure 1-15 As shown

[0050] The present invention discloses a retrieval bag for NOSES (Noise, Surgery, and Extraction) of surgical specimens in rectal cancer surgery, comprising a main tube, a shaping section, and a separation section. The main tube includes a tube membrane (1) and a bottom membrane (110). The bottom membrane (110) is fixedly connected to the lower side of the tube membrane (1), and a lower air hole (113) is opened on the bottom membrane (110). The shaping section includes a side tube membrane (2), an upper ring membrane (301), and an upper tube membrane (310). The side tube membrane (2) is fixedly connected to the side of the tube membrane (1), and an upper conical membrane (3) is fixedly connected to the upper side of the tube membrane (1). The upper ring membrane (301) is fixedly connected to the upper edge of the upper conical membrane (3). The upper tube membrane (310) is fixedly connected between the side tube membrane (2) and the upper ring membrane (301), and the upper tube membrane (310) is fixedly connected to the upper conical membrane (3). The separation section includes an upper pull wire (313), a lower pull wire (210), and a lower bundle membrane (101). The lower bundle membrane (101) is located below the bottom membrane (110). The lower pull wire (210) is fixedly connected to the lower bundle membrane (101). The lower pull wire (210) extends into the cylindrical membrane (1) through the lower air hole (113). The lower end of the side tube membrane (2) is located inside the cylindrical membrane (1) and has an inner air hole (201). The lower pull wire (210) extends into the side tube membrane (2) through the inner air hole (201). The upper pull wire (313) is connected to the upper side of the lower pull wire (210). The upper pull wire (313) extends into the side tube membrane (2) after passing through the upper tube membrane (310). The upper end of the upper pull wire (313) is fixedly connected to the inner side of the upper ring membrane (301).

[0051] A discontinuous connecting ring (102) is fixedly connected between the lower membrane (101) and the bottom membrane (110).

[0052] The bottom membrane (110) is fixedly connected to a conical membrane (111) pointing towards the side of the cylindrical membrane (1) at the position of the lower air hole (113). The upper end of the conical membrane (111) has a non-closed structure, and the pull-down line (210) is slidably connected to the conical membrane (111).

[0053] The side tube membrane (2), upper tube membrane (310), pull-down wire (210), and conical membrane (111) are provided in two sets. The side tube membrane (2) is located on both sides of the cylindrical membrane (1), and the upper tube membrane (310) is located on both sides of the upper conical membrane (3).

[0054] A positioning membrane (112) is fixedly connected between the two conical membranes (111).

[0055] The upper pull line (313) is fixedly connected to a limiting expansion knot (312) at one end near the lower pull line (210). A notched connecting line is fixedly connected to the lower side of the limiting expansion knot (312). The lower end of the notched connecting line is fixedly connected to the lower pull line (210). The notch of the notched connecting line is on the side away from the lower air hole (113).

[0056] The pull-up wires (313) corresponding to the two sets of pull-down wires (210) extend in the same direction along the axis of the upper ring membrane (301) within the upper ring membrane (301), and the extension length of the pull-up wires (313) is 1 / 4 of the length of the upper ring membrane (301);

[0057] The upper ring membrane (301) is slidably connected to a tensioning wire (302) at its outer edge, and the two ends of the tensioning wire (302) extend out of the upper ring membrane (301).

[0058] Example 2

[0059] like Figure 16-18 As shown

[0060] The axial length of the upper conical membrane (3) is 10 cm; it is easy to place the specimen and shrinks the upper ring membrane (301) by the tightening line (302) after placement.

[0061] The diameter of the tubular membrane (1) is 8cm, and the length of the tubular membrane (1) is 10cm;

[0062] The bottom membrane (110) is provided with an annular groove (120) near the tubular membrane (1), and the bottom membrane (110) is also provided with a breakpoint groove (121) at the position of the annular groove (120). The breakpoint grooves (121) are arranged in a ring array on the bottom membrane (110) corresponding to the annular grooves (120). After the surgeon pulls the surgical specimen into the tubular membrane (1) through the conical membrane (111) with the oval forceps, the bottom membrane (110) is separated from the tubular membrane (1) through the annular groove (120) and the breakpoint groove (121) to facilitate the removal of the specimen from the body.

[0063] Example 3

[0064] like Figure 19 As shown

[0065] The lengths of the cylindrical membrane (1) and the upper conical membrane (3) are in a 1:1 ratio.

[0066] In summary, the present invention provides a retrieval bag for NOSES (non-surgical specimen collection) in rectal cancer surgery. When in use, the initially flattened and wrinkled tubular membrane (1) is inserted into the abdominal cavity through a puncture card. Inside the abdominal cavity, one end of the lower constrictor membrane (101) is brought out through an anal or vaginal incision. At this time, the upper conical membrane (3) is not separated, the gas from the pneumoperitoneum cannot enter the tubular membrane (1), nor will it push the tubular membrane (1) out of the natural cavity. After the lower end of the tubular membrane (1) is brought out, the lower constrictor membrane (101) is separated through a discontinuous connecting ring (102). During the separation of the lower constrictor membrane (101), the pull-down line (210) is pulled. The pull-down line (210) at this time fills the upper hole of the conical membrane (111), so that once the pneumoperitoneum gas acts on the tubular membrane (1), it will completely expand the tubular membrane (1) without leakage. As the separation of the lower constrictor membrane (101) progresses, the pull-down line (210) moves and pulls the upper pull-down line (313). Two pull-up lines (313) move in opposite directions on both sides of the upper ring membrane (301), causing the flattened and adhered upper conical membrane (3) to fold. Then, through the gaps in the folds and the pneumoperitoneum environment, the gas in the pneumoperitoneum fills the tubular membrane (1). When the pull-up line (210) pulls the limiting expansion knot (312) to the inner pore (201), the pull-up line (210) is pulled towards the inner pore (201), and the gap of the notch connecting line is far away from the inner pore (201), so the gap is pulled more heavily until it breaks with the pull-up line (210). At the same time, the gas fills the tubular membrane (1) and pushes open the limiting expansion knot (312) through the inner pore (201) to inflate the side tubular membrane (2), upper tubular membrane (310) and upper ring membrane (301), so that the overall structure of the tubular membrane (1) and upper conical membrane (3) is stable, the upper opening is stable, and it is convenient for the surgeon to guide the specimen in.

[0067] After the pull-down suture (210) breaks, the lower convoluted membrane (101) is separated as a whole. The pull-down suture (210) comes out from the conical membrane (111), and the gas can also be released from the hole of the conical membrane (111). Based on the role of the bottom membrane (110) in blocking the gas and opening the tube membrane (1) and the upper ring membrane (301), some of the pressure of the pneumoperitoneum is released without affecting the stability of the pneumoperitoneum, and the force of the pneumoperitoneum pushing the tube membrane (1) is reduced. Then, according to the existing surgical operation, the upper conical membrane (3) is clamped by the laparoscope, and the forceps are entered through the conical membrane (111) to pull the specimen into the tube membrane (1). The positioning membrane (112) restricts the deformation of the conical membrane (111) and avoids complete contact with the forceps when the forceps are entered.

[0068] This allows the pull-down line (210) and the conical membrane (111) to work together to first fill the cylindrical membrane (1) in the early stage of the working process, and then open the inner air hole (201) to inflate the upper ring membrane (301). After that, the conical membrane (111) is opened to reduce the pressure of the pneumoperitoneum. In addition, the pull-down line (313) achieves the unexpected effect of separating the upper conical membrane (3) to solve the problem of the initial opening. The side tube membrane (2) and the upper ring membrane (301) work together with the pull-down line (313) to complete the initial opening effect, and also achieve the unexpected technical effect of supporting the cylindrical membrane (1) and the upper ring membrane (301).

[0069] After the specimen is dragged into the tubular membrane (1), the surgeon controls the tension suture (302) through another surgical forceps under the endoscope in the abdominal cavity, and pulls the tension suture (302) to tighten the upper part of the whole, thus completing the specimen acquisition work. When the specimen needs to be removed later, the bottom membrane (110) is separated from the tubular membrane (1) through the break point groove (121) to achieve the effect of removing the specimen from the tubular membrane (1) later.

[0070] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0071] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A retrieval bag for obtaining surgical specimens via NOSES during rectal cancer surgery, characterized in that: The system includes a main cylinder section, a shaping section, and a separating section. The main cylinder section includes a cylindrical membrane and a bottom membrane. The bottom membrane is fixedly connected to the lower side of the cylindrical membrane, and a lower air hole is opened on the bottom membrane. The shaping section includes a side tube membrane, an upper ring membrane, and an upper tube membrane. The side tube membrane is fixedly connected to the side of the cylindrical membrane, an upper conical membrane is fixedly connected to the upper side of the cylindrical membrane, an upper ring membrane is fixedly connected to the upper edge of the upper conical membrane, an upper tube membrane is fixedly connected between the side tube membrane and the upper ring membrane, and the upper tube membrane is fixedly connected to the upper conical membrane. The separation section includes an upper pull wire, a lower pull wire, and a lower bundle membrane. The lower bundle membrane is located below the bottom membrane. The lower pull wire is fixedly connected to the lower bundle membrane. The lower pull wire extends into the cylindrical membrane through a lower air hole. An internal air hole is opened at the lower end of the side tube membrane located inside the cylindrical membrane. The lower pull wire extends into the side tube membrane through the internal air hole. An upper pull wire is connected to the upper side of the lower pull wire. The upper pull wire extends into the side tube membrane after passing through the upper tube membrane. The upper end of the upper pull wire is fixedly connected to the inner side of the upper ring membrane.

2. The retrieval bag for obtaining surgical specimens via NOSES during rectal cancer surgery as described in claim 1, characterized in that: A discontinuous connecting ring is fixedly connected between the lower membrane and the bottom membrane.

3. The retrieval bag for obtaining surgical specimens via NOSES during rectal cancer surgery as described in claim 2, characterized in that: The bottom membrane is fixedly connected to a conical membrane pointing towards one side of the cylindrical membrane at the lower air hole position. The upper end of the conical membrane has a non-closed structure, and the pull-down wire is slidably connected to the conical membrane.

4. The retrieval bag for NOSES surgical specimen collection in rectal cancer surgery as described in claim 3, characterized in that: The side tube membrane, upper tube membrane, pull-down wire, and conical membrane are provided in two sets. The side tube membrane is located on both sides of the cylindrical membrane, and the upper tube membrane is located on both sides of the upper conical membrane.

5. The retrieval bag for NOSES surgical specimen retrieval in rectal cancer surgery as described in claim 4, characterized in that: A positioning membrane is fixedly connected between the two conical membranes.

6. The retrieval bag for obtaining surgical specimens via NOSES during rectal cancer surgery as described in claim 5, characterized in that: The upper pull line is fixedly connected to a limiting expansion knot at one end near the lower pull line. A notched connecting line is fixedly connected to the lower side of the limiting expansion knot. The lower end of the notched connecting line is fixedly connected to the lower pull line. The notch of the notched connecting line is on the side away from the lower air hole.

7. The retrieval bag for obtaining surgical specimens via NOSES during rectal cancer surgery as described in claim 6, characterized in that: The two sets of pull-down wires correspond to the pull-up wires that extend in the same direction along the axis of the upper ring membrane within the upper ring membrane, and the extension length of the pull-up wires is 1 / 4 of the length of the upper ring membrane.

8. The retrieval bag for obtaining surgical specimens via NOSES during rectal cancer surgery as described in claim 7, characterized in that: The upper ring membrane is slidably connected to a tensioning wire at its outer edge, with both ends of the tensioning wire extending out of the upper ring membrane.

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