A minimally invasive surgical retrieval device

Abstract

The application discloses a minimally invasive surgery object taking device, and relates to the technical field of medical instruments, which comprises a first pipe body, a second pipe body, an object taking bag assembly and a line pressing assembly. The first pipe body has opposite first and second ends, and the second pipe body has opposite third and fourth ends. The second pipe body is inserted into the first pipe body and can move along the axial direction of the first pipe body. The object taking bag assembly comprises a bag body and a bag mouth closing line. The bag body is detachably connected with the second pipe body and is located at the third end. One end of the bag mouth closing line is connected with the bag body, and the other end of the bag mouth closing line is arranged in the second pipe body. The line pressing assembly is arranged in the second pipe body and abuts against the bag mouth closing line. The minimally invasive surgery object taking device can automatically tighten the bag mouth while pulling out the second pipe body, and the bag mouth closing line can be automatically separated from the second pipe body, thereby reducing the operation threshold of medical staff.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a minimally invasive surgical retrieval device. Background Technology

[0002] Minimally invasive surgical retrieval devices can be used in conjunction with trocars to remove live specimens from the body and are widely used in various abdominal surgeries. Commonly used retrieval devices include an elastomer, a specimen bag, an outer tube, and an inner tube. The elastomer is housed within the inner tube, and the specimen bag is fitted onto the elastomer and stored together within the outer tube. During use, pushing the inner tube extends the specimen bag from the outer tube, and the elastomer automatically opens the bag. After the specimen is placed in the specimen bag, pulling the inner tube retracts the elastomer into the outer tube. Because the specimen bag cannot be fully retracted into the outer tube once it contains the specimen, the relative movement between the elastomer and the specimen bag tightens the bag's opening. Similarly, if the specimen bag cannot be removed from the trocar once it contains the specimen, the inner tube will obstruct the trocar's passage, while other surgical instruments require unobstructed access. This means that multiple trocars need to be inserted into the patient's abdomen, increasing both the workload of medical staff and the patient's discomfort.

[0003] In some improved existing technologies, a pull string is added to the specimen bag, and the specimen bag is designed to be detachable from the inner tube. The pull string extends from between the inner and outer tubes to the operating end. When the inner tube is withdrawn, the elastomer is not fixedly connected to the specimen bag; the inner tube can be completely withdrawn after separation. If it is necessary to tighten the specimen bag opening, the opening can be tightened by pulling the pull string. After the inner tube is completely withdrawn, the trocar channel can be freed up for use by other surgical instruments. However, the pull string needs to be manually operated, and there is a risk that medical staff may forget to pull the pull string to tighten the bag opening. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a minimally invasive surgical retrieval device that can automatically tighten the bag opening while the second tube is being pulled out, and the closure suture can automatically separate from the second tube, reducing the operational threshold for medical personnel.

[0005] According to an embodiment of the present invention, a minimally invasive surgical retrieval device includes: a first tube having a first end and a second end opposite to each other;

[0006] The second tube has a third end and a fourth end, and is inserted into the first tube. The second tube is capable of moving along the axial direction of the first tube.

[0007] A retrieval bag assembly includes a bag body and a drawstring. The bag body is detachably connected to the second tube and is located at the third end. One end of the drawstring is connected to the bag body, and the other end of the drawstring passes through the interior of the second tube.

[0008] A crimping assembly is disposed inside the second tube body and abuts against the closing line;

[0009] When the minimally invasive surgical retrieval device is in the first state, the bag is located outside the first tube and on the side of the first end away from the second end, and the bag opening is in an open state.

[0010] When the minimally invasive surgical retrieval device is in the first state, the second tube can be operatively moved along a first direction to separate the bag from the second tube, and the closing line is pulled to shrink the bag opening. The first direction is defined as the direction along the axial direction of the first tube from the first end to the second end.

[0011] The minimally invasive surgical specimen retrieval device according to an embodiment of the present invention has at least the following beneficial effects: the second tube is moved and the retrieval bag assembly is pushed out of the first tube, and the bag opening automatically opens to hold the specimen; since the bag containing the specimen cannot return to the first tube, when the second tube is pulled away from the retrieval bag assembly, the bag separates from the second tube, and because the suture assembly presses the closing line against the inner wall of the second tube, the closing line can also be pulled synchronously when the second tube is pulled, so the bag can also tighten and shrink the bag opening while separating from the second tube.

[0012] According to some embodiments of the present invention, the crimping assembly includes an elastic adjustment mechanism and a first block. The first block has a first contact surface, and the elastic adjustment mechanism has a second contact surface. The first contact surface and the second contact surface are distributed opposite to each other. The elastic adjustment mechanism is capable of generating elastic deformation to change the distance between the first contact surface and the second contact surface. The first contact surface abuts against the crimping line, and the second contact surface abuts against the second tube body.

[0013] According to some embodiments of the present invention, when the minimally invasive surgical retrieval device is in the second state, the bag body is separated from the second tube body, and the bag opening of the bag body is in a closed state, and the second tube body can be operatively moved along the first direction to switch the minimally invasive surgical retrieval device to the third state;

[0014] When the minimally invasive surgical retrieval device is in the third state, the second tube is separated from the first tube, and the closure line is separated from the second tube.

[0015] According to some embodiments of the present invention, the interior of the first tube has a first channel through which the second tube passes, the first channel is provided with a sealing assembly, the sealing assembly including a rotatable baffle, the baffle being rotatable to block or open the first channel;

[0016] When the minimally invasive surgical retrieval device is in the first state, the first channel is open, and the second tube passes through the first channel;

[0017] When the minimally invasive surgical retrieval device is in the third state, the baffle blocks the first channel.

[0018] According to some embodiments of the present invention, the sealing assembly further includes a second elastic element and a base, the base being disposed in the first channel and fixed to the first tube body, the base having a second channel communicating with the first channel, the baffle being hinged to the base, and the second elastic element cooperating with the baffle;

[0019] When the minimally invasive surgical retrieval device is in the first state, the baffle flips to open the second channel to open the first channel, and the second tube passes through the first channel and the second channel;

[0020] When the minimally invasive surgical retrieval device is in the third state, the second elastic element drives the baffle to flip and block the second channel to close the first channel.

[0021] According to some embodiments of the present invention, the base is provided with a limiting surface on the side facing the first end, the limiting surface surrounds the second channel, and the angle between the limiting surface and the axis of the first tube is less than 90°;

[0022] When the minimally invasive surgical retrieval device is in the third state, the baffle covers the limiting surface to block the second channel, and the movable end of the baffle is closer to the first end than the hinged end of the baffle.

[0023] According to some embodiments of the present invention, the sealing assembly further includes a sealing ring, which is fixed to the first tube body. When the minimally invasive surgical retrieval device is in the first state, the sealing ring is located between the first tube body and the second tube body, and the sealing ring is in contact with the first tube body and the second tube body respectively.

[0024] According to some embodiments of the present invention, an opening assembly is fixed to the end of the second tube, the bag body is detachably connected to the opening assembly, and the opening assembly is capable of opening the bag opening of the bag body.

[0025] According to some embodiments of the present invention, the bag body has an accommodating channel that surrounds the bag opening of the bag body, and the bag opening assembly includes a first elastic support and a second elastic support, both of which are connected to the second tube body;

[0026] When the minimally invasive surgical retrieval device is in the first state, the first elastic support is inserted through the receiving channel and located on one side of the bag opening of the bag body, and the second elastic support is inserted through the receiving channel and located on the other side of the bag opening of the bag body. The first elastic support and the second elastic support support the bag body and open the bag opening of the bag body.

[0027] According to some embodiments of the present invention, a protective tube is also included, wherein the end of the first elastic support member away from the second tube body is inserted into the protective tube, and the end of the second elastic support member away from the second tube body is also inserted into the protective tube.

[0028] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0030] Figure 1 This is a schematic diagram of the structure of the minimally invasive surgical retrieving device according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the retrieval bag assembly according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the crimping assembly and the finishing line in an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the first tube and the second tube according to an embodiment of the present invention;

[0034] Figure 5 This is an exploded view of the wire pressing assembly according to an embodiment of the present invention;

[0035] Figure 6 This is a partial cross-sectional view of the first tube and the second tube according to an embodiment of the present invention;

[0036] Figure 7 This is a cross-sectional view of the sealing assembly in a blocked state according to an embodiment of the present invention;

[0037] Figure 8 This is a cross-sectional view of the sealing assembly in the open state according to an embodiment of the present invention;

[0038] Figure 9 This is a schematic diagram of the retrieval bag assembly and the bag opening assembly before assembly according to an embodiment of the present invention.

[0039] Icon labels:

[0040] First tube body 100, first end 101, second end 102, first channel 103, second tube body 200, third end 201, fourth end 202, retrieval bag assembly 300, bag body 310, receiving channel 311, closing line 320, pressing line assembly 400, first contact surface 401, second contact surface 402, elastic adjustment mechanism 410, first block 420, first elastic element 411, second block 412, sealing assembly 500, second channel 531, baffle 510, second elastic element 520, base 530, second channel 531, limiting surface 532, sealing ring 540, bag opening assembly 600, first elastic support 610, second elastic support 620, protective tube 630. Detailed Implementation

[0041] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0042] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0043] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0044] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0045] As described in the background section, to alleviate patient discomfort, healthcare professionals strive to reuse the trocar channel occupied by the retrieval device as much as possible. This requires removing the inner tube after the specimen bag of the retrieval device is filled to free up the trocar channel. In some existing improvements, the specimen bag is equipped with a drawstring to tighten or pull the bag opening, and the specimen bag can be separated from the inner tube. However, in existing structures, the drawstring needs to be pulled manually to tighten the bag opening, which carries the risk of healthcare professionals forgetting to do so. Furthermore, the operation of pulling the drawstring to tighten the bag opening relies on the experience of the healthcare professional; if the staff pulls the drawstring after removing the inner tube, the tightening effect of the bag opening is less effective.

[0046] This application improves upon the existing design, and during the improvement process, it was discovered that if the pull cord is connected to a manual release button, and the manual release button is located on the inner tube, allowing for manual separation from the inner tube, the bag opening can be tightened simultaneously with the withdrawal of the inner tube. Specifically, the manual release button is engaged with the inner tube, protruding to its outer surface. When the inner tube is withdrawn, the manual release button pulls the pull cord, moving it along with the inner tube. Simultaneously, the specimen bag separates from the inner tube, tightening the bag opening. Once the bag opening is fully tightened, medical personnel manually press the manual release button, causing it to fall into the inner tube and separate from it. This means both the specimen bag and the pull cord are separated from the inner tube, allowing the inner tube to be removed and freeing up the trocar channel. After the procedure, the specimen bag is removed along with the trocar. However, the aforementioned structure still has problems that require further resolution. For example, medical personnel need to know when to trigger the manual release button; otherwise, the pull cord will not separate from the inner tube, still posing a risk of injury to the patient from pulling the specimen bag. The embodiments of this application can solve the above-mentioned technical problems.

[0047] Reference Figure 1 , Figure 2 as well as Figure 3 As shown, a minimally invasive surgical retrieval device according to an embodiment of the present invention includes a first tube 100, a second tube 200, a retrieval bag assembly 300, and a suture assembly 400.

[0048] The first tube 100 has a first end 101 and a second end 102, and the second tube 200 has a third end 201 and a fourth end 202. The second tube 200 is inserted into the first tube 100 and can move along the axial direction of the first tube 100.

[0049] The retrieval bag assembly 300 includes a bag body 310 and a closing line 320. The bag body 310 is detachably connected to the second tube 200 and is located at the third end 201. One end of the closing line 320 is connected to the bag body 310, and the other end of the closing line 320 passes through the interior of the second tube 200. The sealing assembly 400 is disposed inside the second tube 200 and abuts against the closing line 320.

[0050] When the minimally invasive surgical retrieval device is in the first state, the bag 310 is located outside the first tube 100 and on the side of the first end 101 away from the second end 102, and the bag opening of the bag 310 is in an open state. When the minimally invasive surgical retrieval device is in the first state, the second tube 200 can be operatively moved along a first direction to separate the bag 310 from the second tube 200, and the closing line 320 is pulled to close the bag opening of the bag 310. The direction along the axial direction of the first tube 100 from the first end 101 to the second end 102 is defined as the first direction.

[0051] Taking abdominal surgery as an example, medical staff first insert a trocar into the patient's abdomen, and then operate the minimally invasive surgical retrieval device. When operating the minimally invasive surgical retrieval device, the device switches from an initial state to a first state. In the initial state, the second tube 200 is inserted inside the first tube 100, and the retrieval bag assembly 300 is also housed inside the first tube 100. The fourth end of the second tube 200 extends to the side of the first tube 100 away from the first end for medical staff to operate on. The medical staff then aligns the first tube 100 of the minimally invasive surgical retrieval device, in its initial state, with the trocar. After the first tube 100 is connected to the trocar, the first end of the first tube 100 is close to the patient's abdominal cavity, and the second end is close to the operating position of the medical staff. The medical staff pushes the second tube 200 toward the patient's abdominal cavity and pushes the retrieval bag assembly 300 to the outside of the first tube 100, that is, the retrieval bag assembly 300 reaches the patient's abdominal cavity. At this time, the bag 310 can automatically open the bag mouth and is in an open state, and the minimally invasive surgical retrieval device is in the first state.

[0052] Medical staff insert the specimen into bag 310 and then move the second tube 200 in the first direction, i.e., move the second tube 200 towards the medical staff for removal. Since bag 310, containing the specimen, cannot return to the first tube 100, the second tube 200 separates from bag 310 during its movement in the first direction. Simultaneously, because the suture assembly 400 holds the closing suture 320 against the inside of the second tube 200, the movement of the second tube 200 in the first direction also pulls on the closing suture 320. The relative movement between the closing suture 320 and bag 310 causes the bag opening to close. In other words, as the second tube 200 separates from bag 310, the closing suture 320 tightens and closes the bag opening. As the second tube 200 moves along the first direction, the part of the second tube 200 that provides support to the bag 310 gradually withdraws, while the bag opening is gradually contracted and tightened by the closing line 320. Therefore, the bag opening of the bag 310 has a better contraction and tightening effect, and the specimen is less likely to fall out of the bag 310 after the bag opening is tightened.

[0053] When the minimally invasive surgical retrieval device is in the second state, the bag body 310 is separated from the second tube body 200, and the opening of the bag body 310 is closed. The second tube body 200 can be operatively continued to move in the first direction, and the minimally invasive surgical retrieval device can switch to the third state. When the minimally invasive surgical retrieval device is in the third state, the second tube body 200 is separated from the first tube body 100, and the closing line 320 is separated from the second tube body 200.

[0054] Reference Figure 4 As shown, when medical staff remove the second tube 200, the minimally invasive surgical retrieval device can continuously switch from the first state to the second and third states. This means that medical staff can completely remove the second tube 200 from the first tube 100 in one go. During this process, the closing suture 320 can automatically separate from the second tube 200, eliminating the need for manual separation of the second tube 200 and the closing suture 320. Specifically, after the bag opening contracts and tightens, as the second tube 200 continues to move, the force exerted by the bag 310 on the closing suture 320 gradually increases. When the force on the closing suture 320 exceeds the clamping force of the suture assembly 400, relative movement occurs between the closing suture 320, the second tube 200, and the suture assembly 400. This means that both the closing suture 320 and the bag 310 remain in their original positions. After the second tube 200 is removed, a trocar channel is made available for other surgical instruments to enter and operate. Until the surgery is completed, the suture 320 and the bag 310 can be removed together with the trocar.

[0055] To achieve automatic tightening of the bag opening of the bag body 310 and automatic separation of the closing line 320 from the second tube 200, the key lies in controlling the clamping force of the clamping assembly 400 on the closing line 320. Specifically, the clamping force of the clamping assembly 400 on the closing line 320 needs to be greater than the tightening force of the closing line 320 on the bag opening of the bag body 310. When the second tube 200 is withdrawn, the bag 310 remains in the patient's abdominal cavity. Because the clamping force of the suture assembly 400 on the closing suture 320 is greater than the tension force of the closing suture 320 on the opening of the bag 310, the closing suture 320 can move with the second tube 200 to tighten the opening. When the opening is tightened, the force exerted by the bag 310 on the closing suture 320 will gradually increase, while the clamping force of the suture assembly 400 on the closing suture 320 remains unchanged. Therefore, the force exerted by the tightened bag 310 on the closing suture 320 will definitely be greater than the clamping force of the suture assembly 400 on the closing suture 320, so that the closing suture 320 can detach from the suture assembly 400. Therefore, the closing suture 320 will not continuously pull on the bag 310 to the point that the bag 310 causes harm to the patient.

[0056] In some embodiments, the crimping assembly 400 includes an elastic adjustment mechanism 410 and a first block 420. The first block 420 is provided with a first contact surface 401, and the elastic adjustment mechanism 410 is provided with a second contact surface 402. The first contact surface 401 and the second contact surface 402 are distributed opposite to each other. The elastic adjustment mechanism 410 can generate elastic deformation to change the distance between the first contact surface 401 and the second contact surface 402. The first contact surface 401 abuts against the closing line 320, and the second contact surface 402 abuts against the second tube 200.

[0057] The suture assembly 400 is fixed by abutting against the inner wall of the second tube 200 through the first contact surface 401 and the second contact surface 402. The first contact surface 401 abuts against the closing line 320, so that the closing line 320 is held by both the first contact surface 401 and the inner wall of the second tube 200. The elastic adjustment mechanism 410 can elastically deform to change the distance between the first contact surface 401 and the second contact surface 402. Therefore, in the manufacturing process of the minimally invasive surgical retrieval bag, a greater force can be applied to the elastic adjustment mechanism 410 to reduce the distance between the first contact surface 401 and the second contact surface 402, making it smaller than the inner diameter of the second tube 200. This facilitates placing the suture assembly 400 at a predetermined position inside the second tube 200. Then, when the external force is removed, the elastic adjustment mechanism 410 resets, and the first block 420 holds the closing line 320 against the second tube 200.

[0058] Further optimization, refer to Figure 5 As shown, it can be understood that the elastic adjustment mechanism 410 includes a first elastic element 411 and a second block 412. The first block 420 and the second block 412 are arranged opposite to each other. The first elastic element 411 is disposed between the first block 420 and the second block 412. The first elastic element 411 is configured to drive the first block 420 and the second block 412 away from each other. A first contact surface is disposed on the first block 420 and a second contact surface is disposed on the second block 412. The first block 420 presses the closing line 320 against the inner wall of the second tube 200.

[0059] When the first block 420 presses the tape 320 against the inner wall of the second tube 200, the second block 412 also contacts the inner wall of the second tube 200, providing a support point for the reaction force. Both the first block 420 and the second block 412 generate friction with the inner wall of the second tube 200. The first elastic element 411 is configured to drive the first block 420 and the second block 412 away from each other. That is, the elastic force of the first elastic element 411 affects the pressure between the first block 420, the second block 412 and the inner wall of the second tube 200. As the elastic force of the first elastic element 411 increases, the pressure between the first block 420 and the second tube 200 increases, and the sliding friction force on the first block 420 increases synchronously, that is, the pressing force of the first block 420 on the tape 320 increases. By adjusting the elastic force of the first elastic element 411, the pressing force of the pressing assembly 400 on the closing line 320 can be changed, making it easier to adjust the pressing force of the pressing assembly 400 on the closing line 320 to be greater than the tension force of the closing line 320 on the bag opening of the bag body 310.

[0060] Preferably, the first elastic element 411 is a spring, and the opposing surfaces of the first block 420 and the second block 412 are respectively provided with fixing grooves. The two ends of the spring are respectively inserted into the fixing grooves of the first block 420 and the second block 412. The fixing grooves are used to limit the spring and prevent the spring from being misaligned with the first block 420 or the second block 412 after being compressed.

[0061] It is understandable that the first block 420 has an arc surface on the side away from the second block 412, and the second block 412 also has an arc surface on the side away from the first block 420. The arc surfaces of the first block 420 and the second block 412 both fit with the inner wall of the second tube 200, and the closing line 320 is located between the arc surface of the first block 420 and the inner wall of the second tube 200.

[0062] The arc surface is used to increase the friction area between the first block 420 or the second block 412 and the second tube 200, so that the pressing assembly 400 can press the closing line 320 more reliably when the pressing assembly 400 does not need to move.

[0063] In abdominal surgery, the abdominal cavity typically maintains a certain intra-abdominal pressure. For example, the presence of carbon dioxide gas within the abdominal cavity supports the patient's abdomen, ensuring adequate surgical space. Once the original retrieval bag contains the specimen, the inner tube remains in place, preventing gas leakage, maintaining abdominal pressure, and minimizing surgical space. In the embodiments of this application, the second tube 200 needs to be withdrawn from the first tube 100. During this withdrawal, gas can leak through the first tube 100. Although medical personnel can promptly insert the necessary surgical instruments to re-block the trocar passage, a small amount of gas leakage still occurs, reducing the surgical space. To further prevent gas leakage from the patient's abdominal cavity, or to extend the window between the withdrawal of the second tube 200 and the re-insertion of the surgical instruments, a sealing component 500 can be installed inside the first tube 100.

[0064] Reference Figure 6 and Figure 7 As shown, it can be understood that the interior of the first tube 100 has a first channel 103 through which the second tube 200 passes. The first channel 103 is provided with a sealing assembly 500. The sealing assembly 500 includes a reversible baffle 510, which can be flipped to block or open the first channel 103.

[0065] When the minimally invasive surgical retrieval device is in the first state, the first channel 103 is open and the second tube 200 passes through the first channel 103; when the minimally invasive surgical retrieval device is in the third state, the baffle 510 blocks the first channel 103.

[0066] When the baffle 510 blocks the first channel 103, the gas leakage path in the abdominal cavity is blocked, maintaining abdominal pressure. Because the abdominal pressure is greater than the external air pressure, the gas in the abdominal cavity can also act on the baffle 510 to keep it blocking the first channel 103. When medical personnel insert new surgical instruments into the first channel 103 of the first tube 100, the surgical instruments can also push aside the baffle 510, allowing the instruments to enter the patient's abdominal cavity. It should be understood that after the second tube 200 is withdrawn, other components can drive the baffle 510 to flip and block the first channel 103 again.

[0067] Reference Figure 7 and Figure 8 As shown, it can be understood that the sealing assembly 500 also includes a second elastic element 520 and a base 530. The base 530 is disposed in the first channel 103 and fixed to the first tube body 100. The base 530 has a second channel 531, which communicates with the first channel 103. The baffle 510 is hinged to the base 530, and the second elastic element 520 cooperates with the baffle 510.

[0068] When the minimally invasive surgical retrieval device is in the first state, the baffle 510 flips to open the second channel 531 to open the first channel 103, and the second tube 200 passes through the first channel 103 and the second channel 531; when the minimally invasive surgical retrieval device is in the third state, the second elastic element 520 drives the baffle 510 to flip and block the second channel 531 to close the first channel 103.

[0069] When the second tube 200 remains inside the first tube 100, i.e., the second tube 200 passes through the first channel 103 and the second channel 531, the baffle 510 is blocked by the second tube 200 and cannot flip to block the second channel 531. When the second tube 200 is pulled out of the first tube 100, since the second elastic element 520 is configured to drive the baffle 510 to flip to block the second channel 531, the baffle 510 can flip and block the second channel 531 at the moment the second tube 200 is removed. Preferably, the second elastic element 520 is an elastic sheet. When the baffle 510 opens the second channel 531, the elastic sheet is in an elastic deformation energy storage state. The second tube 200 is in the first tube 100, preventing the baffle 510 from flipping, so as to keep the elastic sheet in an energy storage state. When the second tube 200 is pulled out, the force balance of the elastic sheet is disrupted, and the elastic sheet drives the baffle 510 to flip, blocking the second channel 531.

[0070] It is understood that the base 530 has a limiting surface 532 on the side facing the first end 101. The limiting surface 532 surrounds the second channel 531, and the angle between the limiting surface 532 and the axis of the first tube 100 is less than 90°.

[0071] When the minimally invasive surgical retrieval device is in the third state, the baffle 510 covers the limiting surface 532 to block the second channel 531, and the movable end of the baffle 510 is closer to the first end 101 than the hinged end of the baffle 510.

[0072] The angle between the limiting surface 532 and the axis of the first tube 100 is less than 90°, meaning the limiting surface 532 is not perpendicular to the axis of the first tube 100. Similarly, when the baffle 510 abuts against the limiting surface 532 to block the second channel 531, the baffle 510 is also not perpendicular to the axis of the first tube 100. Further, refer to... Figure 7 The structure shown ensures that the movable end of the baffle 510 is closer to the first end 101 than the hinged end of the baffle 510. Therefore, when the surgical instrument is inserted into the first tube 100, it moves from the second end 102 toward the first end 101. The surgical instrument comes into contact with the inclined baffle 510, making it easier to push the baffle 510 to flip and open the second channel 531.

[0073] To allow the second tube 200 to move smoothly within the first tube 100, its inner diameter is designed and manufactured to be slightly smaller than that of the first tube 100, inevitably creating a gap between the walls of the two tubes. This gap can lead to a small leakage of gas from the patient's abdominal cavity. As the surgery progresses and time increases, the leakage of gas can cause an excessive drop in abdominal pressure, affecting the surgical space.

[0074] Further improvements can be understood to include a sealing ring 540 in the sealing assembly 500. The sealing ring 540 is fixed to the first tube 100. When the minimally invasive surgical retrieval device is in the first state, the sealing ring 540 is located between the first tube 100 and the second tube 200, and the sealing ring 540 is in contact with the first tube 100 and the second tube 200 respectively.

[0075] The sealing ring 540 effectively seals the gap between the first tube 100 and the second tube 200, preventing gas from leaking from the patient's abdominal cavity. It's important to understand that with the sealing ring 540 installed, there's no need for precise control of the dimensions or gap between the first tube 100 and the second tube 200 to reduce abdominal gas leakage. Therefore, the first tube 100 and the second tube 200 do not require higher machining precision, reducing manufacturing costs. The sealing ring 540 is made of an elastic material, allowing it to float and adapt to different gap values ​​between the first tube 100 and the second tube 200.

[0076] Understandably, the end of the second tube 200 is fixed with a bag opening component 600, and the bag body 310 is detachably connected to the bag opening component 600. The bag opening component 600 can open the bag opening of the bag body 310.

[0077] Specifically, refer to Figure 9 As shown, it can be understood that the bag body 310 has a receiving channel 311, which surrounds the bag opening of the bag body 310. The bag opening assembly 600 includes a first elastic support 610 and a second elastic support 620, both of which are connected to the second tube 200.

[0078] When the minimally invasive surgical retrieval device is in the first state, the first elastic support 610 passes through the receiving channel 311 and is located on one side of the bag opening of the bag body 310, and the second elastic support 620 passes through the receiving channel 311 and is located on the other side of the bag opening of the bag body 310. The first elastic support 610 and the second elastic support 620 support the bag body 310 and open the bag opening of the bag body 310.

[0079] Both the first elastic support 610 and the second elastic support 620 can be elongated elastic elements. In their default state, when not subjected to external force, the first elastic support 610 and the second elastic support 620 can be arranged in a circular shape. Therefore, the first elastic support 610 and the second elastic support 620 are respectively inserted into the receiving channel 311 of the bag body 310 and located on both sides of the bag opening. When the first elastic support 610 and the second elastic support 620 are not subjected to external force, that is, when the first elastic support 610 and the second elastic support 620 are not constrained by the first tube 100, they can elastically deform into a circle, causing the bag body 310 to open so that the bag opening is circular. During the manufacturing and assembly stage of the minimally invasive surgical retrieval device, the first elastic support 610 and the second elastic support 620 are housed inside the first tube 100 along with the bag body 310. Therefore, the first elastic support 610 and the second elastic support 620 are constrained by the first tube 100 and are approximately linear elongated. It should be understood that the ends of the first elastic support 610 and the second elastic support 620 that are away from the second tube 200 are not connected to each other, so that both the first elastic support 610 and the second elastic support 620 can be detached from the receiving channel 311 of the bag 310. That is, the bag 310 containing the specimen is blocked and cannot return to the first tube 100. Both the first elastic support 610 and the second elastic support 620 can be detached from the bag 310 as the second tube 200 is pulled out.

[0080] Since the first elastic support 610 and the second elastic support 620 will quickly deform and open the bag opening after extending from the first tube 100, there is a small probability that the ends of the first elastic support 610 and the second elastic support 620 away from the second tube 200 will tear the bag 310 or the receiving channel 311. Therefore, it is preferable to mount the protective tube 630 on the first elastic support 610 and the second elastic support 620.

[0081] Specifically, it can be understood that it also includes a protective tube 630, with the end of the first elastic support 610 away from the second tube body 200 inserted into the protective tube 630, and the end of the second elastic support 620 away from the second tube body 200 also inserted into the protective tube 630.

[0082] The protective tube 630 can be made of plastic. It covers the sharp edges of the ends of the first elastic support 610 and the second elastic support 620, reducing the risk of damage to the bag body 310 when the first and second elastic support members 610 and 620 are opened. It should be understood that, in order to separate the first and second elastic support members 610 and 620 from the bag body 310 when the second tube 200 is removed, the protective tube 630 should be detachable from the first and second elastic support members 610 and 620. For example, after the ends of the first and second elastic support members 610 and 620 are inserted into the protective tube 630, they are not fixed to the protective tube 630; that is, the first and second elastic support members 610 and 620 remain movable and displaceable from the protective tube 630. Furthermore, to prevent the protective tube 630 from remaining in the patient's abdominal cavity, the first elastic support 610 or the second elastic support 620 can be fixed to the protective tube 630. When the second tube 200 is removed, one of the elastic supports that is not fixed to the protective tube 630 will detach from the protective tube 630. That is, the ends of the first elastic support 610 and the second elastic support 620 that are away from the second tube 200 are still separable, and the first elastic support 610 and the second elastic support 620 can detach from the receiving channel 311.

[0083] In some embodiments, when the minimally invasive surgical retrieval device is in its initial state, the second tube 200 is inserted inside the first tube 100, the retrieval bag assembly 300 is also housed inside the first tube 100, the fourth end of the second tube 200 extends to the side of the second end of the first tube 100 away from the first end for operation by medical personnel, and the first elastic support 610 and the second elastic support 620 are housed inside the first tube 100 along with the bag 310.

[0084] When the minimally invasive surgical retrieval device is in the first state, the bag body 310 is located outside the first tube 100, and the bag opening of the bag body 310 is in an open state. The bag body 310 is located on the side of the first end 101 of the first tube 100 away from the second end 102. When the first elastic support member 610 and the second elastic support member 620 are not subjected to external force, that is, when the first elastic support member 610 and the second elastic support member 620 are not constrained by the first tube 100, they can elastically deform into a circle, causing the bag body 310 to open so that the bag opening is open into a circle.

[0085] When the minimally invasive surgical retrieval device is in the second state, the bag 310 is separated from the second tube 200, and the opening of the bag 310 is closed. Specifically, both the first elastic support 610 and the second elastic support 620 can be dislodged from the receiving channel 311 of the bag 310, meaning that the bag 310 containing the specimen is blocked from returning to the first tube 100, and both the first elastic support 610 and the second elastic support 620 can detach from the bag 310 as the second tube 200 is pulled out.

[0086] When the minimally invasive surgical retrieval device is in the third state, the second tube 200 is separated from the first tube 100, and the closure line 320 is separated from the second tube 200.

[0087] When medical staff operate the minimally invasive surgical retrieval device, the device switches from an initial state to a first state, then to a second state, and finally to a third state. The medical staff connects the first tube 100 of the minimally invasive surgical retrieval device (in the initial state) to the trocar. After connection, the first end of the first tube 100 is close to the patient's abdominal cavity, and the second end is close to the medical staff's operating position. The medical staff pushes the second tube 200 towards the patient's abdominal cavity, pushing the retrieval bag assembly 300 outside the first tube 100, meaning the retrieval bag assembly 300 reaches the patient's abdominal cavity. At this time, both the first elastic support 610 and the second elastic support 620 are released from the constraint of the first tube 100. The first elastic support 610 and the second elastic support 620 can elastically deform into a circle, causing the bag 310 to open so that the bag opening is circular. Medical staff insert the specimen into the bag 310 and then move the second tube 200 in the first direction, i.e., move the second tube 200 towards the medical staff for removal. Once the bag 310 contains the specimen, it cannot return to the first tube 100. Therefore, during the movement of the second tube 200 in the first direction, both the first elastic support 610 and the second elastic support 620 can disengage from the receiving channel 311 of the bag 310. Simultaneously, because the suture assembly 400 holds the closing suture 320 against the inside of the second tube 200, the movement of the second tube 200 in the first direction also pulls on the closing suture 320. The relative movement between the closing suture 320 and the bag 310 can shrink the opening of the bag 310. Medical staff continue to pull the second tube 200 in the first direction. As the bag opening is tightened, the force exerted by the bag 310 on the closing line 320 will gradually increase, while the clamping force of the sealing assembly 400 on the closing line 320 remains constant. Therefore, the force exerted by the tightened bag 310 on the closing line 320 will definitely be greater than the clamping force of the sealing assembly 400 on the closing line 320, so that the closing line 320 can detach from the sealing assembly 400. Therefore, the closing line 320 will not keep pulling the bag 310 so that the bag 310 will not cause harm to the patient.

[0088] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A minimally invasive surgical retrieval device, comprising: include: A first tube (100) has a first end (101) and a second end (102) opposite each other. The second tube (200) has a third end (201) and a fourth end (202) opposite to each other. The second tube (200) is inserted into the first tube (100). The second tube (200) is movable along the axial direction of the first tube (100). A retrieval bag assembly (300) includes a bag body (310) and a drawstring (320). The bag body (310) is detachably connected to the second tube body (200) and the bag body (310) is located at the third end (201). One end of the drawstring (320) is connected to the bag body (310), and the other end of the drawstring (320) passes through the interior of the second tube body (200). A crimping assembly (400) is disposed inside the second tube body (200) and abuts against the closing line (320), and the crimping assembly (400) is configured to exert a clamping force of the crimping assembly (400) on the closing line (320) greater than the tension force of the closing line (320) on the bag opening of the bag body (310); The crimping assembly (400) includes an elastic adjustment mechanism (410) and a first block (420). The elastic adjustment mechanism (410) includes a first elastic element (411) and a second block (412). The first block (420) and the second block (412) are disposed opposite to each other. The first elastic element (411) is disposed between the first block (420) and the second block (412). The first elastic element (411) is configured to drive the first block (420) and the second block (412) away from each other. The first block (420) is provided with a first contact surface (401), and the second block (412) is provided with a second contact surface (402). The first contact surface (401) and the second contact surface (402) are distributed opposite to each other. The first elastic member (411) can generate elastic deformation to change the distance between the first contact surface (401) and the second contact surface (402). The first contact surface (401) abuts against the constriction line (320), and the second contact surface (402) abuts against the second tube (200). When the minimally invasive surgical retrieval device is in the first state, the bag (310) is located outside the first tube (100) and on the side of the first end (101) away from the second end (102), and the bag opening of the bag (310) is in an open state. When the minimally invasive surgical retrieval device is in the first state, the second tube (200) can be operatively moved along the first direction to separate the bag (310) from the second tube (200), and the closing line (320) is pulled to shrink the opening of the bag (310). The first direction is defined as the direction along the axial direction of the first tube (100) from the first end (101) to the second end (102). When the minimally invasive surgical retrieval device is in the second state, the bag (310) is separated from the second tube (200), and the bag opening of the bag (310) is closed. The second tube (200) can be operatively moved along the first direction to switch the minimally invasive surgical retrieval device to the third state. When the minimally invasive surgical retrieval device is in the third state, the second tube (200) is separated from the first tube (100), and the closing line (320) is separated from the second tube (200).

2. The minimally invasive surgical retrieval device according to claim 1, wherein, The first tube (100) has a first channel (103) through which the second tube (200) passes. The first channel (103) is provided with a sealing assembly (500). The sealing assembly (500) includes a reversible baffle (510). The baffle (510) can be flipped to block or open the first channel (103). When the minimally invasive surgical retrieval device is in the first state, the first channel (103) is in the open state, and the second tube (200) passes through the first channel (103). When the minimally invasive surgical retrieval device is in the third state, the baffle (510) blocks the first channel (103).

3. The minimally invasive surgical retrieving device according to claim 2, characterized in that, The sealing assembly (500) further includes a second elastic element (520) and a base (530). The base (530) is disposed in the first channel (103) and fixed to the first tube body (100). The base (530) has a second channel (531) that communicates with the first channel (103). The baffle (510) is hinged to the base (530), and the second elastic element (520) cooperates with the baffle (510). When the minimally invasive surgical retrieval device is in the first state, the baffle (510) flips to open the second channel (531) to open the first channel (103), and the second tube (200) passes through the first channel (103) and the second channel (531). When the minimally invasive surgical retrieval device is in the third state, the second elastic element (520) drives the baffle (510) to flip and block the second channel (531) to close the first channel (103).

4. The minimally invasive surgical retrieval device according to claim 3, characterized in that, The base (530) has a limiting surface (532) on the side facing the first end (101), the limiting surface (532) surrounds the second channel (531), and the angle between the limiting surface (532) and the axis of the first tube (100) is less than 90°. When the minimally invasive surgical retrieval device is in the third state, the baffle (510) covers the limiting surface (532) to block the second channel (531), and the movable end of the baffle (510) is closer to the first end (101) than the hinged end of the baffle (510).

5. The minimally invasive surgical retrieving device according to claim 2, characterized in that, The sealing assembly (500) further includes a sealing ring (540), which is fixed to the first tube body (100). When the minimally invasive surgical retrieval device is in the first state, the sealing ring (540) is located between the first tube body (100) and the second tube body (200), and the sealing ring (540) is in contact with the first tube body (100) and the second tube body (200) respectively.

6. The minimally invasive surgical retrieval device according to claim 1, characterized in that, The end of the second tube (200) is fixed with a bag opening component (600), the bag body (310) is detachably connected to the bag opening component (600), and the bag opening component (600) can open the bag opening of the bag body (310).

7. The minimally invasive surgical retrieval device according to claim 6, characterized in that, The bag body (310) has an accommodating channel (311) which surrounds the bag opening of the bag body (310). The bag opening assembly (600) includes a first elastic support (610) and a second elastic support (620), both of which are connected to the second tube body (200). When the minimally invasive surgical retrieval device is in the first state, the first elastic support (610) passes through the receiving channel (311) and is located on one side of the bag opening of the bag body (310), and the second elastic support (620) passes through the receiving channel (311) and is located on the other side of the bag opening of the bag body (310). The first elastic support (610) and the second elastic support (620) support the bag body (310) and open the bag opening of the bag body (310).

8. The minimally invasive surgical retrieval device according to claim 7, characterized in that, It also includes a protective tube (630), with one end of the first elastic support (610) away from the second tube body (200) inserted into the protective tube (630), and one end of the second elastic support (620) away from the second tube body (200) also inserted into the protective tube (630).

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