In-vivo specimen recovery device for endoscope

Abstract

The in-vivo specimen recovery device for the endoscope comprises a first tube body and a second tube body which are integrally arranged, biopsy forceps are arranged at the far end of the first tube body, a first operating handle for operating the biopsy forceps is arranged at the near end of the first tube body, and a second operating handle is arranged at the near end of the second tube body. A specimen recycling mechanism is arranged at the far end of the second tube body and comprises a collecting net body, and the collecting net body comprises an umbrella-shaped supporting framework and a net body arranged on the umbrella-shaped supporting framework; the collection net body is pushed by the pushing pipe to have a collection state of being collected into the open storage cavity and a stretching collection state of stretching out of the open storage cavity. According to the in-vivo specimen recycling device for the endoscope, in the process that the first pipe body and the second pipe body are conveyed into the body or taken out of the body, the collecting net body is in a folded and contracted state, and when specimens need to be recycled, the collecting net body can be opened to be in an open state through the pushing pipe and the traction guide wire.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to an intraoperative specimen retrieval device for endoscopy. Background Technology

[0002] Endoscopic mucosal resection and submucosal dissection, among other surgical procedures, use endoscopes and auxiliary instruments to remove lesions in the mucosa and submucosa to achieve the goal of treating diseases. After the surgery, the specimen must be retrieved for analysis of its pathological nature and grading to confirm the success of the surgery and guide subsequent follow-up and treatment plans.

[0003] Currently, specimens requiring endoscopic retrieval are typically recovered using suction methods. However, during procedures, for larger specimens, conventional suction methods are insufficient, requiring the specimen to be carried out with the endoscope, which can lead to specimen breakage. Retrieving multiple specimens necessitates multiple endoscopic insertions, prolonging the procedure and increasing patient discomfort. While existing polyp retrieval nets can prevent specimen breakage and allow for the retrieval of multiple pieces at once, they still cannot completely eliminate the need for multiple endoscopic insertions. Utility Model Content

[0004] The purpose of this invention is to provide an endoscopic specimen retrieval device to address the aforementioned shortcomings of the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An endoscopic specimen retrieval device includes an integrally formed first tube and a second tube. A biopsy forceps is disposed at the distal end of the first tube, and a first operating handle for operating the biopsy forceps is disposed at the proximal end of the first tube. A second operating handle is disposed at the proximal end of the second tube, and a specimen retrieval mechanism is disposed at the distal end of the second tube. The specimen retrieval mechanism includes a collection net, which comprises an umbrella-shaped support frame and a mesh disposed on the umbrella-shaped support frame. A push tube is disposed inside the second tube, and the umbrella-shaped support frame is connected to the end of the push tube. The second tube body has a movement channel inside for the push tube to move. The end of the second tube body is provided with an open storage cavity. The collecting net body is pushed by the push tube and has a stored state that is stored in the open storage cavity and an extended collection state that extends out of the open storage cavity. The push tube is provided with a traction guide wire. One end of the traction guide wire is connected to the umbrella-shaped support frame, and the other end of the traction guide wire is provided with a pull ring on the second operating handle. The traction guide wire can be operated by the pull ring to make the umbrella-shaped support frame have an open state and a folded and retracted state.

[0007] The aforementioned endoscopic in vivo specimen retrieval device includes an umbrella-shaped support frame comprising an umbrella-shaped frame and an expanding frame. The umbrella-shaped frame includes a top ring and multiple umbrella ribs, which are arranged sequentially at intervals along the circumference of the top ring.

[0008] In the aforementioned endoscopic specimen retrieval device, the top ring is provided with multiple hinge seats along the circumference, and the end of the umbrella rib is rotatably connected to the hinge seats.

[0009] The aforementioned endoscopic in vivo specimen retrieval device includes a support frame comprising an annular movable component and multiple support rods, wherein the annular movable component forms a collection port for inserting the specimen.

[0010] In the aforementioned endoscopic specimen retrieval device, multiple expansion rods are arranged sequentially at intervals along the circumference of the annular movable member. The annular movable member is provided with multiple rotating connectors along its circumference. One end of each expansion rod is connected to the rotating connector, and the other end is rotatably connected to the middle position of the umbrella rib rod.

[0011] The aforementioned endoscopic specimen retrieval device includes an outer mesh and an inner mesh. The outer mesh is arranged sequentially at intervals along the circumference of the umbrella-shaped rod, and the inner mesh is arranged sequentially along the circumference of the spreading rod. A retrieval cavity for specimen retrieval is formed between the inner and outer meshes.

[0012] In the aforementioned endoscopic in vivo specimen retrieval device, a moving rod is provided at the middle position of the annular movable component, and the end of the moving rod is connected to the annular movable component through two connecting strips.

[0013] In the aforementioned endoscopic specimen retrieval device, the end of the push tube is provided with a sliding channel, the movable end of the moving rod is slidably connected in the sliding channel, and the end of the traction guide wire is connected to the end of the moving rod.

[0014] In the aforementioned endoscopic specimen retrieval device, a spring element is provided in the sliding channel, and the spring element blocks the movement of the moving rod along the sliding channel.

[0015] In the above technical solution, the endoscopic specimen retrieval device provided by this utility model includes an integrally formed first tube and a second tube. The first tube is provided with a biopsy forceps and a first operating handle. The proximal end of the second tube is provided with a second operating handle, and the distal end of the second tube is provided with a specimen retrieval mechanism. The specimen retrieval mechanism includes a collection net. During the process of the first tube and the second tube being transported into or removed from the body, the collection net is in a folded and contracted state and located in an open receiving cavity. When it is necessary to retrieve the specimen, the collection net can be opened and placed in an expanded state by a push tube and a traction guide wire, so that the specimen can be placed into the open receiving cavity. The collection net can retrieve multiple specimens at the same time, and during the retrieval process, since the specimen is located inside the collection net, the specimen can be protected and prevented from being damaged. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the structure of the endoscopic in vivo specimen recovery device provided in this embodiment of the utility model;

[0018] Figure 2 A bottom view of the specimen recovery mechanism provided in an embodiment of this utility model;

[0019] Figure 3 A top view of the specimen recovery mechanism provided in an embodiment of this utility model;

[0020] Figure 4 A schematic diagram of the specimen recovery mechanism provided in this embodiment of the utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. First tube body; 11. Biopsy forceps; 12. First operating handle; 2. Second tube body; 21. Second operating handle; 22. Pull ring; 23. Opening receiving cavity; 24. Push tube; 241. Sliding channel; 25. Traction guide wire; 26. Spring component; 3. Specimen retrieval mechanism; 31. Collection net body; 32. Outer net body; 33. Inner net body; 34. Avoidance opening; 4. Umbrella-shaped frame; 41. Top ring; 42. Umbrella rib rod; 5. Spreading frame; 51. Annular movable component; 511. Collection port; 52. Spreading rod; 53. Moving rod; 54. Connecting bar. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] like Figure 1-4 As shown, this utility model provides an endoscopic specimen retrieval device, comprising an integrally formed first tube 1 and second tube 2. A biopsy forceps 11 is disposed at the distal end of the first tube 1, and a first operating handle 12 for operating the biopsy forceps 11 is disposed at the proximal end of the first tube 1. A second operating handle 21 is disposed at the proximal end of the second tube 2, and a specimen retrieval mechanism 3 is disposed at the distal end of the second tube 2. The specimen retrieval mechanism 3 includes a collection net 31, which comprises an umbrella-shaped support frame and a net disposed on the umbrella-shaped support frame. A push tube 24 is disposed inside the second tube 2, and the umbrella-shaped support frame is connected to the push tube. At the end of 24, the second tube 2 forms a movement channel for the push tube 24 to move. The end of the second tube 2 is provided with an open storage cavity 23. The collecting net 31 is pushed by the second tube 2 and has a stored state that is stored in the open storage cavity 23 and an extended collection state that extends out of the open storage cavity 23. The push tube 24 is provided with a traction guide wire 25. One end of the traction guide wire 25 is connected to the umbrella-shaped support frame, and the other end of the traction guide wire 25 is provided with a pull ring 22 on the second operating handle 21. The traction guide wire 25 can be operated by the pull ring 22 to make the umbrella-shaped support frame have an open state and a folded and retracted state.

[0025] Specifically, for ease of description, the end of the first tube 1 and the second tube 2 that enters the patient's body is called the distal end, and the end of the first tube 1 and the second tube 2 that is operated by the patient is called the proximal end. The first tube 1 and the second tube 2 are an integral structure, and the first tube 1 and the second tube 2 are arranged side by side. A biopsy forceps 11 is provided at the distal end of the first tube 1. The biopsy forceps 11 is used to remove or peel off lesions or mucosa. A first operating handle 12 for operating the biopsy forceps 11 is provided at the proximal end of the first tube 1. The biopsy forceps 11 and the handle for operating it are existing technologies and will not be described in detail.

[0026] In this embodiment, the second tube 2 and the specimen retrieval mechanism 3 located at the distal end of the second tube 2 cooperate to retrieve the specimen. A second operating handle 21 is located at the proximal end of the second tube 2, which can operate the specimen retrieval mechanism 3. The specimen retrieval mechanism 3 includes a collection net 31, which includes an umbrella-shaped support frame and a net. The net covers the umbrella-shaped support frame. The umbrella-shaped support frame has two states during use: an open state and a folded and retracted state. In the open state, the umbrella-shaped support frame is opened, and the net is opened to form a structure that can collect the specimen. Conversely, in the folded and retracted state, the umbrella-shaped support frame is retracted, and the net is also retracted. This facilitates the movement and operation of the second tube 2 and the specimen retrieval mechanism 3, thereby making it convenient to deliver the second tube 2 into the patient's body and to retrieve the collected specimen.

[0027] In this embodiment, a push tube 24 is provided inside the second tube body 2, and a movement channel is provided inside the second tube body 2. A second operating handle 21 is provided at the proximal end of the second tube body 2. The push tube 24 can be operated by the second operating handle 21 to make the push tube 24 move along the movement channel. The distal end of the push tube 24 is connected to the umbrella-shaped support frame, and the proximal end of the push tube 24 is connected to the second operating handle 21. An open storage cavity 23 is provided at the distal end of the second tube body 2. The open storage cavity 23 is correspondingly provided to the umbrella-shaped support frame. When the umbrella-shaped support frame is in a folded and retracted state, the umbrella-shaped support frame can be stored in the open storage cavity 23. During use, the umbrella-shaped support frame can be pushed out of the open storage cavity 23 by the second operating handle 21 and the push tube 24, so that the collecting net 31 is in an extended collecting state.

[0028] In this embodiment, a traction guide wire 25 is provided inside the push tube 24. The traction guide wire 25 is arranged along the push tube 24. One end of the traction guide wire 25 is connected to the transmission component on the umbrella-shaped support frame. The other end of the traction guide wire 25 is provided with a pull ring 22 on the second operating handle 21. The traction guide wire 25 can be pulled by the pull ring 22, and the traction guide wire 25 can drive the umbrella-shaped support frame, thereby switching the umbrella-shaped support frame between the open state and the folded and retracted state.

[0029] The endoscopic specimen retrieval device provided by this utility model includes an integrally formed first tube 1 and second tube 2. The first tube 1 is provided with a biopsy forceps 11 and a first operating handle 12. The proximal end of the second tube 2 is provided with a second operating handle 21, and the distal end of the second tube 2 is provided with a specimen retrieval mechanism 3. The specimen retrieval mechanism 3 includes a collection net 31. During the process of the first tube 1 and the second tube 2 being transported into or removed from the body, the collection net 31 is in a folded and retracted state and located in an open receiving cavity 23. When it is necessary to retrieve the specimen, the collection net 31 can be opened and placed in an expanded state by the push tube 24 and the guide wire 25. In this way, the specimen can be placed into the open receiving cavity 23. The collection net 31 can retrieve multiple specimens at the same time. During the retrieval process, since the specimen is located inside the collection net 31, the specimen can be protected and prevented from being damaged.

[0030] In this embodiment, preferably, the umbrella-shaped support frame includes an umbrella-shaped frame 4 and a spreading frame 5. The umbrella-shaped frame 4 includes a top ring 41 and a plurality of umbrella ribs 42. The plurality of umbrella ribs 42 are arranged sequentially at intervals along the circumference of the top ring 41. The top ring 41 is provided with a plurality of hinge seats along the circumference. The ends of the umbrella ribs 42 are rotatably connected to the hinge seats. The umbrella-shaped frame 4 can be driven to spread open by the spreading frame 5, thereby making the umbrella-shaped frame 4 spread open to form an umbrella-shaped structure.

[0031] In this embodiment, preferably, the supporting frame 5 includes an annular movable member 51 and multiple supporting rods 52. The size of the annular movable member 51 is larger than the size of the top ring 41. The annular movable member 51 forms a collection port 511 for specimens to be placed in. During use, the specimens to be recovered can be placed into the supported mesh body through the collection port 511.

[0032] In this embodiment, preferably, multiple spreading rods 52 are arranged sequentially at intervals along the circumference of the annular movable member 51. The annular movable member 51 is provided with multiple rotating connectors along its circumference. One end of each spreading rod 52 is connected to a rotating connector, and the other end is rotatably connected to the middle position of the umbrella rib rod 42. A middle hinge is provided at the middle position of the umbrella frame 4, and the other end of each spreading rod 52 is connected to the middle hinge. When the annular movable member 51 moves towards the top ring 41, it drives each spreading rod 52, causing the spreading rods 52 to separate and spread apart. The umbrella ribs 42 are opened, so that the umbrella frame 4 and the net body move to the opened state. At this time, the umbrella frame 4, the net body and the opened frame 5 can retrieve the specimen. Conversely, when the annular movable part 51 moves away from the top ring 41, the annular movable part 51 pulls each of the opening rods 52, so that each of the opening rods 52 retracts towards each other. Each umbrella rib 42 is also pulled towards each other by the opening rods 52, so that the umbrella frame 4, the net body and the opened frame 5 move to the folded and contracted state, so as to facilitate the removal of the collection net body 31 from the body.

[0033] In this embodiment, preferably, the mesh includes an outer mesh 32 and an inner mesh 33. The outer mesh 32 is arranged sequentially at intervals along the circumference of the umbrella rib rod 42, and the inner mesh 33 is arranged sequentially along the circumference of the spreading rod 52. A retrieval cavity for specimen retrieval is formed between the inner mesh 33 and the outer mesh 32. At this time, the collection port 511 is the only opening of the retrieval cavity. The specimen to be retrieved can be placed into the retrieval cavity through the collection port 511. An avoidance opening 34 is provided on the side of the inner mesh 33 and the outer mesh 32 near the first tube 1. The size of the avoidance opening 34 corresponds to that of the first tube 1. It should be noted that the length of the first tube 1 is greater than the length of the second tube 2. The distal end of the first tube 1 beyond the second tube 2 forms an extension section. The biopsy forceps 11 is set on the extension section. The extension section can remove or peel off the lesion or mucosa and can put the specimen into the retrieval cavity from the collection port 511.

[0034] In this embodiment, preferably, a moving rod 53 is provided at the middle position of the annular movable member 51. The end of the moving rod 53 is connected to the annular movable member 51 through two connecting strips 54. A circular end is provided at the end of the moving rod 53. One end of the connecting strip 54 is fixedly connected to the circular end, and the other end is connected to the annular movable member 51. Thus, the moving rod 53, the connecting strip 54 and the annular movable member 51 form an integral structure.

[0035] In this embodiment, preferably, the end of the push tube 24 is provided with a sliding channel 241, which is coaxially arranged with the moving rod 53. The movable end of the moving rod 53 is slidably connected in the sliding channel 241. Inside the push tube 24, a guide wire channel is provided for the movement of the guide wire 25. The radial dimension of the guide wire channel is smaller than the radial dimension of the sliding channel 241. A spring member 26 is provided in the sliding channel 241, which blocks the movement stroke of the moving rod 53 along the sliding channel 241. The end of the guide wire 25 is connected to the end of the moving rod 53. The other end of the guide wire 25 passes through the spring member 26 and the guide wire channel and is connected to the pull ring 22. Thus, during use, when the pull ring 22 is pulled, the pull ring 22 pulls the guide wire 25, thereby causing the annular movable member 51 to move upwards. The movement of the rod 53 along the sliding channel 241 presses against the spring 26, and the annular movable part 51 drives each of the spreading rods 52, causing them to separate and spread apart. Each spreading rod 52 spreads the umbrella rib rods 42, thereby causing the umbrella frame 4 and the net to move to the spread state. During this process, the spring 26 is compressed by the rod 53. After the specimen is retrieved, the pull on the pull ring 22 is released. Under the action of the spring 26, the annular movable part 51 moves away from the top ring 41. The annular movable part 51 pulls each of the spreading rods 52, causing them to close together. Each umbrella rib rod 42 is also pulled by the spreading rods 52 and closes together, thereby causing the umbrella frame 4, the net, and the spread frame 5 to move to the folded and contracted state.

[0036] In this embodiment, the operation steps during use are as follows:

[0037] Step 1, in the initial state: the umbrella-shaped frame 4, the net body and the spreading frame 5 are in a folded and contracted state, and the collecting net body 31 is located in the open storage cavity 23 in a stored state;

[0038] In the second step, when the first tube 1 and the second tube 2 enter the body for specimen retrieval, the umbrella-shaped support frame is first pushed out of the open receiving cavity 23 by the second operating handle 21 and the push tube 24, so that the collection net 31 is in the extended collection state. Then, when the pull ring 22 is pulled, the pull ring 22 pulls the guide wire 25, so that the umbrella-shaped frame 4, the net and the spreading frame 5 move to the spreading state.

[0039] The third step is to keep the guide wire 25 in a pulled state so that the umbrella-shaped skeleton 4, the mesh and the spreading skeleton 5 are kept in an open state, and put the specimen into the recovery chamber from the collection port 511 through the biopsy forceps 11.

[0040] Fourth step: After the specimen is recovered, first release the pull ring 22. Under the action of the spring 26, the annular movable part 51 moves away from the top ring 41, so that the umbrella-shaped frame 4, the net body and the spreading frame 5 move to the folded and contracted state. Then, the collection net body 31 can be recovered into the open storage cavity 23 by the second operating handle 21 and the push tube 24. Finally, the first tube body 1 and the second tube body 2 are removed from the body, so that the recovered specimen can be removed from the body.

[0041] If multiple specimens from multiple parts of the body need to be retrieved, after the specimen from one part is retrieved, the following operations are performed in sequence: First, the umbrella-shaped skeleton 4, the net body, and the spreading skeleton 5 are moved to a folded and contracted state, and the collecting net body 31 is retrieved into the open storage cavity 23. Then, the second and third steps are repeated. After the specimen from the next part is retrieved, the fourth step is performed to remove the specimen from the body.

[0042] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An endoscopic in vivo specimen retrieval device, characterized in that, The device includes an integrally formed first tube and a second tube. A biopsy forceps is located at the distal end of the first tube, and a first operating handle for operating the biopsy forceps is located at the proximal end of the first tube. A second operating handle is located at the proximal end of the second tube, and a specimen retrieval mechanism is located at the distal end of the second tube. The specimen retrieval mechanism includes a collection net, which comprises an umbrella-shaped support frame and a net body disposed on the umbrella-shaped support frame. A push tube is located inside the second tube, and the umbrella-shaped support frame is connected to the end of the push tube. A movement channel for the push tube is formed inside the second tube, and an open receiving cavity is located at the end of the second tube. The collection net, pushed by the push tube, has a retractable state (retracted into the open receiving cavity) and an extended state (extended from the open receiving cavity). A guide wire is located inside the push tube, with one end connected to the umbrella-shaped support frame and the other end of the guide wire having a pull ring located on the second operating handle. The pull ring allows the umbrella-shaped support frame to be in an open or folded state.

2. The in-vivo specimen collection device for endoscopy according to claim 1, wherein The umbrella-shaped support frame includes an umbrella-shaped frame and an opening frame. The umbrella-shaped frame includes a top ring and multiple umbrella ribs, which are arranged at intervals along the circumference of the top ring.

3. The in-vivo specimen collection device according to claim 2, wherein The top ring is provided with multiple hinge seats along the circumference, and the end of the umbrella rib is rotatably connected to the hinge seats.

4. The in-vivo specimen collection device according to claim 3, wherein The expansion frame includes an annular movable component and multiple expansion rods, the annular movable component forming a collection port for inserting specimens.

5. The in-vivo specimen collection device according to claim 4, wherein Multiple spreading rods are arranged sequentially at intervals along the circumference of the annular movable member. The annular movable member is provided with multiple rotating connectors along its circumference. One end of each spreading rod is connected to the rotating connector, and the other end is rotatably connected to the middle position of the umbrella rib rod.

6. The in-vivo specimen collection device of Claim 5, wherein The net body includes an outer net body and an inner net body. The outer net bodies are arranged sequentially at intervals along the circumference of the umbrella rib rod, and the inner net bodies are arranged sequentially along the circumference of the spreading rod. A retrieval cavity for specimen retrieval is formed between the inner and outer net bodies.

7. The in-vivo specimen collection device of Claim 6, wherein A moving rod is provided at the middle position of the annular movable component, and the end of the moving rod is connected to the annular movable component through two connecting strips.

8. The in-vivo specimen collection device of Claim 7, wherein The end of the push tube is provided with a sliding channel, the movable end of the motion rod is slidably connected in the sliding channel, and the end of the traction guide wire is connected to the end of the motion rod.

9. The in-vivo specimen collection device of Claim 8, wherein A spring is provided inside the sliding channel, and the spring blocks the movement of the moving rod along the sliding channel.

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