A digestive tract polyp cutting and collecting device

Abstract

The present application discloses a digestive tract polyp cutting and collecting instrument, comprising a fixing part, a front support ring, a rear support ring and a net bag, the projection of each support ring on its cross section comprises a leading moving part, a rear moving part and an elastic part arranged between the leading moving part and the rear moving part, each support ring is connected with a net bag respectively, the rear moving part of the front support ring is connected with the leading moving part of the rear support ring, and the fixing part is connected with the rear moving part of the rear support ring; it also comprises a traction part, which is provided with a traction end capable of moving along a first direction and is connected with the leading moving part of the front support ring, along the first direction, the traction end, the leading moving part and the rear moving part of the front support ring, the leading moving part and the rear moving part of the rear support ring, and the fixing part are arranged in sequence; the elastic force generated by the elastic part of the front support ring in a closed state is smaller than the elastic force generated by the elastic part of the rear support ring in a closed state, and under the action of the traction end, the front support ring and the rear support ring can be closed sequentially along the first direction.

Description

Technical Field

[0001] The present application belongs to the technical field of medical devices, and specifically relates to a digestive tract polyp cutting and collection device. Background Art

[0002] The digestive tract is a muscular tube that starts from the mouth, continues to the pharynx, esophagus, stomach, small intestine, large intestine, and ends at the anal canal. It includes the mouth, pharynx, esophagus, stomach, small intestine (duodenum, jejunum, ileum), large intestine (cecum, appendix, colon, rectum), and anal canal.

[0003] Polyps refer to growths that grow on the surface of human tissue. Usually, growths that grow on the surface of human mucosa are collectively referred to as polyps. For example, polyps that grow on the stomach wall are called gastric polyps, and those that grow in the intestines are called intestinal polyps. If there are more than two polyps in a certain part, it is also called multiple polyps.

[0004] Polyps are a type of benign tumor, but some benign polyps have the potential to develop into malignant lesions. In order to examine the nature of the polyps, it is necessary to remove the polyps from the digestive tract, recover the polyps cut from the digestive tract, and send them to the pathology department for testing to determine whether the polyps are benign or malignant. The doctor will formulate the next treatment plan based on the test results of the pathology department.

[0005] Polyps may exist at different locations in the digestive tract at the same time, and it is necessary to collect polyps in different locations and take them out of the body. Since multiple polyps grow in similar locations, the nature of each polyp may be different, so multiple polyps need to be recovered and examined one by one. However, since the diameters of the esophagus, large intestine, small intestine, and anal canal are relatively small, and the large intestine and small intestine have many intestinal folds and are relatively tortuous, in clinical operations, endoscopes (gastroscopy, colonoscopy) are often used to establish a forceps channel for snares or other surgical instruments to enter the digestive tract, and electric knives and snares are used to cut the polyps in the digestive tract, and then a net bag is used to collect the polyps and take them out of the body. However, since the diameter of the endoscopic forceps channel ranges from 2 to 4 mm, the size of intestinal polyps is mostly less than 5 mm, but some polyps can reach two centimeters in size. If a single net bag is used to remove multiple polyps at one time, the net bag takes up a lot of space and it is difficult for the net bag to pass through the forceps to enter the outside world. The net bag can only be pulled by the endoscope to pass through the digestive tract and return to the outside world. However, since the net bag wrapped with multiple polyps takes up a lot of space and it is difficult for it to pass through the narrow digestive tract, it is difficult to use one net bag to remove multiple polyps at the same time; when using an endoscope for surgical operations, anesthetics are needed to anesthetize the patient, and the amount of anesthetics used for the patient needs to be strictly controlled. The patient's anesthesia time is limited. If a certain amount of polyps are removed each time, and the endoscope enters and exits the digestive tract multiple times to remove all the polyps, it will cause discomfort to the patient many times and greatly affect efficiency, taking up a lot of anesthesia time, and affecting the time for other surgical operations using the gastroscope. Summary of the invention

[0006] In order to smoothly remove multiple polyps in the digestive tract at the same time, improve surgical efficiency, reduce the surgical time occupied by polyp removal, avoid repeated insertion of the endoscope, and reduce patient discomfort, the present application provides a digestive tract polyp cutting and collection instrument.

[0007] A digestive tract polyp cutting and collecting instrument, comprising a fixing part, a front support ring, a rear support ring and a net bag, the projection of each support ring on its cross section comprises a leading moving part, a trailing moving part and an elastic part arranged between the leading moving part and the trailing moving part, each support ring is respectively connected with a net bag, the trailing moving part of the front support ring is connected with the leading moving part of the trailing support ring, and the fixing part is connected with the trailing moving part of the trailing support ring; further comprising a traction part, a traction end capable of moving along a first direction being connected with the leading moving part of the front support ring, and along the first direction, the traction end, the leading moving part of the front support ring and the trailing moving part of the trailing support ring are connected. The front supporting ring is in a closed state and the rear supporting ring is in an open state when the traction end moves to close the front supporting ring. The traction force of the traction end is greater than the elastic force generated by the elastic part of the rear supporting ring in the closed state, and the traction end and the fixing member jointly close the rear supporting ring, so that the front supporting ring and the rear supporting ring can be closed sequentially along the first direction.

[0008] After the polyps are separated from the digestive tract using surgical instruments such as an electric knife or a snare, the net bags connected to each supporting ring can be used to pack a portion of the polyps. When the polyps fill the net bag connected to the front supporting ring, the traction end of the traction piece is used to close the front supporting ring, and then the polyps are placed in the net bag connected to the rear supporting ring. After the net bag is full, the rear supporting ring is used to block the connection between the net bag and the outside world to prevent the polyps from re-entering the digestive tract. Since at least two net bags are used to pack the polyps, the volume of a single net bag is relatively small, and it can pass through the digestive tract to enter the outside world more smoothly, so that more polyps can be removed at a single time. The surgical instrument can cooperate with the net bag in the present application to achieve cutting of the polyps while using the net bag to collect the polyps.

[0009] By means of the elastic force generated by the elastic part of the front support ring in the closed state being smaller than the elastic force generated by the elastic part of the rear support ring in the closed state, the elastic part of the rear support ring can provide the front support ring with a force opposite to the first direction. When the traction member gives traction force to the front support ring to close the front support ring, the force of the traction force on the elastic part of the rear support ring is not enough to enable the leading part of the rear support ring to overcome the elastic force of the elastic part and approach the rear moving part of the rear support ring to close the rear support ring. Therefore, when the front support ring is closed, the rear support ring can be in an open state. This arrangement makes the structure of the present application simpler and more reliable when used.

[0010] In one embodiment of the present application, the leading and trailing moving parts of the support ring are provided with first through holes, the first through holes penetrate the side wall of the support ring, the traction member passes through each first through hole, and the traction end is fixedly connected to the leading part of the front support ring.

[0011] The support rings are connected in series by the traction member, so that the connection between the support rings is tighter. At the same time, it is beneficial for the traction member to drive the leading part of each support ring to move along the first direction, so that each support ring can be effectively closed in sequence.

[0012] In one embodiment of the present application, the first through holes provided on each support ring are coaxially arranged, and the axial direction of each first through hole is parallel to the first direction.

[0013] In one embodiment of the present application, the projections of the leading moving part and the trailing moving part on the cross section of the support ring are in the shape of an arc, and the arc openings of the leading moving part and the trailing moving part are oriented opposite to the first direction.

[0014] By setting the shapes of the leading moving part and the trailing moving part, when the leading moving part is close to the trailing moving part, its shape during deformation is more controllable, thereby avoiding excessive deformation of the support ring and preventing the polyp from passing through the support ring and re-entering the digestive tract.

[0015] In one embodiment of the present application, the first through hole is arranged at the center of the projection of the leading moving part and the trailing moving part on the cross section of the support ring, and the projection of the traction member on the cross section of the support ring passes through the center of the projection of the leading moving part and the trailing moving part on the cross section of the support ring.

[0016] In one embodiment of the present application, the leading moving part of the same support ring is provided with a first clamping structure, and the trailing moving part is provided with a second clamping structure that can be clamped with the first clamping structure; when the support ring is in a closed state, the first clamping structure is clamped with the second clamping structure to limit the leading moving part and the trailing moving part of the same support ring from moving away from each other.

[0017] By engaging the first engaging structure with the second engaging structure when the support ring is in a closed state, it is possible to prevent the support ring in a closed state from reopening and the polyps contained in the net bag from re-entering the digestive tract.

[0018] In one embodiment of the present application, along the first direction, the depth of the net bags connected to the support rings gradually decreases.

[0019] When the last support ring is closed along the first direction, the polyps need to be transported to the outside world through the net bag. The amount of polyps contained in each net bag can be roughly the same. When the net bag does not enter the outside world through the clamp channel of the endoscope, the endoscope drags the net bag in the digestive tract and the polyps are deposited at the bottom of the net bag. Since the depth of each net bag is different, the polyps in each net bag will not pile up together, so that the net bag carrying the polyps can easily pass through the relatively narrow digestive tract and enter the outside world.

[0020] In one embodiment of the present application, the gastrointestinal polyp cutting and collection instrument also includes an operating handle and an operating rope, the operating handle includes an operating body and a first operating member that slides with the operating body; one end of the operating rope is connected to the traction member, and the other end is fixedly connected to the first operating member, and the first operating member can drive the traction end to move along the first direction through the operating rope.

[0021] In one embodiment of the present application, the fixing member is a fixing tube, one end of which is connected to the operating body, and the other end is fixedly connected to the rear moving part of the rear support ring; the operating rope passes through the hollow channel of the fixing tube and is fixedly connected to the first operating member.

[0022] In one embodiment of the present application, the support ring includes a net bag end face and a receiving end face, and the net bag is arranged on the net bag end face; the digestive tract polyp cutting and collection instrument also includes a snare, the sheath of the snare is slidably connected to the fixing member, and the snare ring of the snare can move along the straight line direction where the first direction is located to pass through the receiving end faces of different support rings.

[0023] The present application provides a snare, so that while the snare is used to cut the polyp, the net bag can timely receive the polyp cut by the snare.

[0024] The present application has at least the following beneficial effects:

[0025] 1. After the polyps are separated from the digestive tract by surgical instruments such as an electric knife or a snare, the net bags connected to each supporting ring can be used to pack a portion of the polyps. When the polyps fill the net bag connected to the front supporting ring, the traction end of the traction piece is used to close the front supporting ring, and then the polyps are placed in the net bag connected to the rear supporting ring. After the net bag is full, the rear supporting ring is used to block the connection between the net bag and the outside world to prevent the polyps from re-entering the digestive tract. Since at least two net bags are used to pack the polyps, the volume of a single net bag is relatively small, and it can pass through the digestive tract to enter the outside world more smoothly, so that more polyps can be taken out at a single time. The surgical instrument can cooperate with the net bag in the present application to achieve cutting of the polyps while using the net bag to collect the polyps.

[0026] 2. The elastic force generated by the elastic part of the front support ring in the closed state is smaller than the elastic force generated by the elastic part of the rear support ring in the closed state, so that the elastic part of the rear support ring can provide the front support ring with a force opposite to the first direction. When the traction member gives traction to the front support ring to close the front support ring, the force of the traction force on the elastic part of the rear support ring is not enough to make the leading part of the rear support ring overcome the elastic force of the elastic part and approach the rear moving part of the rear support ring to close the rear support ring. Therefore, the rear support ring can be in an open state when the front support ring is closed. This arrangement makes the structure of the present application relatively simple.

[0027] 3. By setting the shapes of the leading moving part and the trailing moving part, when the leading moving part is close to the trailing moving part, its shape during deformation is more controllable, thereby avoiding excessive deformation of the support ring and preventing the polyp from passing through the support ring and re-entering the digestive tract. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of an exemplary implementation of the present application;

[0029] Figure 2 is a structural schematic diagram of an exemplary implementation of the support ring arrangement in the present application;

[0030] Figure 3 is a structural schematic diagram of an exemplary embodiment of the support ring in the present application when it is opened;

[0031] Figure 4 It is a structural schematic diagram of an exemplary implementation method when the first support ring in the present application is closed;

[0032] Figure 5 It is a structural schematic diagram of an exemplary implementation method when the second support ring in the present application is closed;

[0033] Figure 6 It is a structural schematic diagram of an exemplary implementation method of the present application when three support rings are closed;

[0034] Figure 7 is a structural schematic diagram of an exemplary implementation of the second clamping structure in the present application;

[0035] Figure 8 is a structural schematic diagram of an exemplary implementation of the first clamping structure in the present application;

[0036] Fig. 9 is a schematic diagram of an exemplary implementation of the first direction of the present application;

[0037] Fig.10 It is a structural schematic diagram of an exemplary embodiment of the net bag in the present application when it moves in the digestive tract;

[0038] Fig.11 It is a structural diagram of an illustrative implementation of the operating subject in this application.

[0039] In the figure:

[0040] 101, first support ring; 102, first elastic part; 103, second support ring; 104, second elastic part; 105, third support ring; 106, third elastic part; 107, first moving part; 108, second moving part; 109, first through hole;

[0041] 201, fixed pipe;

[0042] 301, traction member; 302, traction end;

[0043] 401, net bag;

[0044] 501, first direction;

[0045] 601, first clamping structure; 602, second clamping structure;

[0046] 701. Polyp;

[0047] 801, snare ring; 802, sheath of snare;

[0048] 901, operating body; 902, first operating member; 903, operating rope. DETAILED DESCRIPTION

[0049] In order to have a clearer understanding of the technical features, purposes and effects of the present application, the specific implementation methods of the present application are now described with reference to the accompanying drawings. The same reference numerals in the drawings represent components with the same structure or similar structures but the same functions.

[0050] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.

[0051] In order to simplify the drawings, only the parts related to the present application are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked.

[0052] See also Figures 1 to 11 Understand this application.

[0053] See also Figure 1 , Figure 2A digestive tract polyp cutting and collecting device, comprising a fixing part, a front support ring, a rear support ring and a net bag 401, the projection of each support ring on its cross section comprises a first moving part 107, a rear moving part 108 and an elastic part arranged between the first moving part 107 and the rear moving part 108, each support ring is respectively connected with a net bag 401, the rear moving part 108 of the front support ring is connected with the first moving part 107 of the rear support ring, and the fixing part is connected with the rear moving part 108 of the rear support ring; the front support ring and the rear support ring are arranged in an array along a first direction 501, so as to Figure 2 The directions shown in the figure are taken as reference. Figure 2 The downward direction is the first direction 501; Fig. 9 The arrow shown at the middle label 501 also indicates the first direction 501. The leading moving part 107 and the trailing moving part 108 are arranged relatively to each other with respect to the longitudinal section of the support ring. The end face of the support ring is connected to a net bag 401. The support ring and the net bag 401 constitute a collecting unit. Along the first direction 501, a plurality of interconnected collecting units are provided.

[0054] See also Fig. 9 In one embodiment of the present application, the support ring includes a net bag 401 end face and a receiving end face, and the net bag 401 is arranged on the end face of the net bag 401; the digestive tract polyp cutting and collecting device also includes a snare, and the sheath 802 of the snare is slidably connected to the fixing member, Fig. 9 The fixing member is a fixing tube 201, and the sheath tube 802 of the snare is slidably connected to the fixing tube 201. The snare ring 801 of the snare can be first received in the sheath tube, so that the sheath tube can move along the linear direction where the first direction 501 is located to pass through the receiving end faces of different support rings, so that the snare sheath tube sends the snare ring 801 to the receiving end faces of different support rings, so that the snare ring 801 can cut the polyp 701 at the receiving end faces, and the elastic part of the support ring makes the support ring open, see Figure 1 Under the action of the first elastic part 102, the first support ring 101 opens, and the polyp 701 separated from the digestive tract can pass through the first support ring 101 and enter the net bag 401 connected to the first support ring 101, thereby preventing the polyp 701 from falling into the digestive tract and requiring the polyp 701 in the digestive tract to be collected again.

[0055] The present application also includes a traction member 301, which is provided with a traction end 302 capable of moving along a first direction 501 and connected to the leading moving part 107 of the front support ring. Along the first direction 501, the traction end 302, the leading moving part 107 and the trailing moving part 108 of the front support ring and the leading moving part 107 and the trailing moving part 108 of the rear support ring, and the fixing member are arranged in sequence; the elastic force generated by the elastic part of the front support ring in a closed state is less than the elastic force generated by the elastic part of the rear support ring in a closed state, so that the traction end 302 moves, so that when the front support ring is closed, the rear support ring is in an open state, until the traction force of the traction end 302 is greater than the elastic force generated by the elastic part of the rear support ring in a closed state, and the combined action of the traction end 302 and the fixing member causes the rear support ring to close, so that the front support ring and the rear support ring can be closed sequentially along the first direction 501.

[0056] In order to better describe the present application, the support rings are named as the first support ring 101, the second support ring 103, and the third support ring 105. Along the first direction 501, the first support ring 101, the second support ring 103, and the third support ring 105 are arranged in sequence. Figure 1 The traction end 302 of the traction tube is connected to the first moving part 107 of the first support ring 101, and the fixing piece is connected to the rear moving part 108 of the third support ring 105. The technicians in the technical field of the present application can understand that the front support ring and the rear support ring above do not represent the number of support rings in the present application, but are only used to indicate the positional relationship between the front support ring and the rear support ring relative to the traction end 302 and the fixing piece. See Figure 1 , compared with the first support ring 101 and the second support ring 103, the first support ring 101 is the front support ring, and the second support ring 103 is the rear support ring. Compared with the second support ring 103 and the third support ring 105, the second support ring 103 is the front support ring, and the third support ring 105 is the rear support ring. The front support ring and the rear support ring in this application do not improperly limit the number of support rings in this application. The number of support rings and net bags 401 is not limited to three, and only the first support ring 101 and the second support ring 103 can be set. Of course, more support rings and net bags 401 can be set along the first direction 501, which will not be repeated here. The direction opposite to the first direction 501 is named the second direction. The multiple in this application refers to two or more.

[0057] In one embodiment of the present application, along the first direction 501, the rearward moving portion 108 of the previous support ring is fixedly connected to the forward moving portion 107 of the subsequent support ring; the projection of the support ring on its cross section includes the forward moving portion 107, the elastic portion, and the rearward moving portion 108, the elastic portion is arranged between the forward moving portion 107 and the rearward moving portion 108, the elastic portion is elastic, and can undergo elastic deformation; along the first direction 501, the elastic force generated by the elastic portion of the previous support ring in a closed state is smaller than the elastic force generated by the elastic portion of the subsequent support ring in a closed state.

[0058] See also Figures 1 to 6The first support ring 101, the second support ring 103, and the third support ring 105 are all provided with a first moving part 107, a rear moving part 108, and an elastic part, and the rear moving part 108 of the first support ring 101 is connected to the first moving part 107 of the second support ring 103, and the rear moving part 108 of the second support ring 103 is connected to the first moving part 107 of the third support ring 105. Since the elastic part is elastic, the first moving part 107 of the support ring needs to overcome the elastic force generated by the elastic deformation of the elastic part when it is close to the rear moving part 108. When each support ring in the present application is squeezed by the traction end 302, the elastic part of each support ring can provide a direction opposite to the first direction 501. The force is applied to prevent the traction end 302 from approaching the fixing member along the first direction 501. In order to better describe the present application, the elastic portion provided on the first support ring 101 is named as the first elastic portion 102, the elastic portion provided on the second support ring 103 is named as the second elastic portion 104, and the elastic portion provided on the third support ring 105 is named as the third elastic portion 106. Since the fixing member is connected to the rear moving portion 108 of the third support ring 105, when the traction member 301 pulls the first moving portion 107 of the first support ring 101 to move, the distance between the traction end 302 and the fixing tube 201 is reduced, causing the elastic portions of each support ring to undergo elastic deformation, and the traction member 301 pulls the first moving portion 107 of the first support ring 101 to move. The force exerted by the guide tube on the first support ring 101 is transmitted to the second elastic part 104 and the third elastic part 106, causing elastic deformation of the first elastic part 102, the second elastic part 104 and the third elastic part 106. When the force exerted by the traction tube on the first support ring 101's leading part 107 is large enough, the first elastic part 102 is caused to undergo sufficient elastic deformation, so that the leading part 107 of the first support ring 101 is close to the trailing part 108, so that the first support ring 101 is in a closed state. Since the elastic force generated by the elastic part of the previous support ring in the closed state is less than the elastic force generated by the elastic part of the next support ring in the closed state, that is, the first support ring 101 is in a closed state. When the first support ring 101, the second support ring 103, and the third support ring 105 are in a closed state, the first elastic part 102, the second elastic part 104, and the third elastic part 106 are elastically deformed, and the elastic force generated by the third elastic part 106 is greater than the elastic force generated by the second elastic part 104, and the elastic force generated by the second elastic part 104 is greater than the elastic force generated by the first elastic part 102. At this time, the elastic force generated by the first elastic part 102 is the first elastic force, the elastic force generated by the second elastic part 104 is the second elastic force, and the elastic force generated by the third elastic part 106 is the third elastic force. The first elastic force, the second elastic force, and the third elastic force act in opposite directions to the traction force of the traction tube.

[0059] When the traction force of the traction end 302 is greater than the first elastic force and less than the second elastic force, the second elastic part 104 and the third elastic part 106 provide a force to limit the rear moving part 108 of the first support ring 101 from moving toward the fixed part, and the traction end 302 pulls the first moving part 107 of the first support ring 101 to move toward the rear moving part 108, causing the first support ring 101 to close, but the traction force can only cause the second elastic part 104 and the third elastic part 106 to undergo a certain degree of elastic deformation, but the deformation degree of the second elastic part 104 and the third elastic part 106 is not enough to cause the second support ring 103 and the third support ring 105 to close; when the traction force of the traction end 302 is greater than the second elastic force and less than the second elastic force, the second elastic part 104 and the third elastic part 106 are not enough to cause the second support ring 103 and the third support ring 105 to close. When the third elastic force is applied, the traction end 302 pulls the first support ring 101 toward the rear moving part 108 of the second support ring 103, so that the first support ring 101 and the second support ring 103 are closed, but it is not enough to make the third elastic part 106 have sufficient elastic deformation, and the third support ring 105 is in an open state until the traction force of the traction end 302 is greater than the third elastic force, the third elastic part 106 has sufficient elastic deformation, the fixing part limits the movement of the rear moving part 108 of the third support ring 105, and the forward moving part 107 of the third support ring 105 moves toward the rear moving part 108, so that the first support ring 101, the second support ring 103, and the third support ring 105 are all closed.

[0060] That is, when the traction force of the traction end 302 is less than the first elastic force, the first support ring 101, the second support ring 103, and the third support ring 105 are in an open state; when the traction force of the traction end 302 is greater than the first elastic force but less than the second elastic force, the first support ring 101 is closed, and the second support ring 103 and the third support ring 105 are in an open state; when the traction force of the traction end 302 is greater than the second elastic force but less than the third elastic force, the first support ring 101 and the second support ring 103 are closed, and the third support ring 105 is in an open state; when the traction force of the traction end 302 is greater than the third elastic force, the first support ring 101, the second support ring 103, and the third support ring 105 are closed, so that by controlling the size of the traction force of the traction end 302 and cooperating with the first elastic part 102, the second elastic part 104, and the third elastic part 106, the first support ring 101, the second support ring 103, and the third support ring 105 are closed in sequence along the first direction 501.

[0061] See also Figure 1 , Figure 7 , Figure 8In one embodiment of the present application, the leading moving part 107 and the trailing moving part 108 of the support ring are provided with a first through hole 109, and the first through hole 109 is opened on the side wall of the support ring. The first through hole 109 passes through the side wall of the support ring, and each first through hole 109 provided on each support ring is coaxially arranged, and the axial direction of each first through hole 109 is parallel to the first direction 501. The traction tube passes through each first through hole 109, and the traction end 302 is fixedly connected to the leading moving part 107 of the front support ring, that is, it is connected to the leading moving part 107 of the first support ring 101.

[0062] Each first through hole 109 has a limiting effect on the traction tube, so that the movement path of the traction tube is relatively fixed, so that the traction tube can squeeze the support ring along the first direction 501, and the support ring undergoes elastic deformation along the first direction 501. Since the first through holes 109 of each support ring are coaxially arranged, when the traction end 302 makes the first support ring 101, the second support ring 103, and the third support ring 105 in a closed state, the first moving part 107 and the rear moving part 108 of the three support rings overlap together, so that when the net bag 401 containing the polyp 701 is taken out through the digestive tract, the three support rings can be squeezed against each other under the action of the elastic part, thereby closing the connection between each net bag 401 and the outside world, which can effectively prevent the polyp 701 in the net bag 401 from re-entering the digestive tract, and ensure that the polyp 701 can be taken out smoothly. Of course, the axial direction of the first through hole 109 is not necessarily parallel to the first direction 501, and the traction member 301 can drive the first moving part 107 of the first support ring 101 to move along the first direction 501.

[0063] See also Figure 2 In one embodiment of the present application, the projections of the leading moving portion 107 and the trailing moving portion 108 on the cross section of the support ring are arc-shaped, and the arc openings of the leading moving portion 107 and the trailing moving portion 108 are oriented opposite to the first direction 501 .

[0064] When the traction end 302 closes the support ring, the leading portion 107 of the first support ring 101 can be recessed toward the trailing portion 108 in the first direction 501, so that the deformation of the leading portion 107 becomes controllable, and because the projections of the leading portion 107 and the trailing portion 108 on the cross section of the support ring are both arc-shaped, the leading portion 107 and the trailing portion 108 can fully overlap when the support ring is in a closed state, so that the first support ring 101 can be fully closed, preventing the polyp 701 in the net bag 401 from re-entering the digestive tract due to factors such as the movement of the net bag 401. Since the projections of the leading moving parts 107 and the trailing moving parts 108 of the first support ring 101, the second support ring 103 and the third support ring 105 on the cross section of the support ring are all in an arc shape, and the opening direction of the arc is opposite to the first direction 501, and since the trailing moving part 108 of the first support ring 101 is connected with the leading moving part 107 of the second support ring 103, the trailing moving part 108 of the first support ring 101 and the trailing moving part 108 of the second support ring 103 can overlap with each other, and similarly, the trailing moving part 108 of the second support ring 103 can overlap with the trailing moving part 108 of the third support ring 105, so that the leading moving parts 107 and the trailing moving parts 108 of the first support ring 101, the second support ring 103 and the third support ring 105 overlap with each other, avoiding the situation that the support rings cannot be closed due to the mismatch of the shapes of the first support ring 101, the second support ring 103 and the third support ring 105.

[0065] See also Figure 2 In one embodiment of the present application, the first through hole 109 is arranged at the center of the projection of the leading moving part 107 and the trailing moving part 108 on the cross section of the support ring, and the projection of the traction tube on the cross section of the support ring passes through the center of the projection of the leading moving part 107 and the trailing moving part 108 on the cross section of the support ring, the center of the projection of the leading moving part 107 and the trailing moving part 108 on the cross section of the support ring, and the center of the leading moving part 107 and the trailing moving part 108 are all in the straight line direction where the traction tube is located, the leading moving part 107 is symmetrically arranged about the traction tube, and the trailing moving part 108 is symmetrically arranged about the traction tube, and the leading moving part 107 and the trailing moving part 108 of the support ring are connected by an elastic part, see Figure 2The first elastic part 102 and the first moving part 107 and the rear moving part 108 of the first support ring 101 are symmetrically arranged about the traction tube. When the traction tube pulls the middle position of the first moving part 107 to move along the first direction 501, the elastic parts of the first support ring 101, the second support ring 103, and the third support ring 105 are elastically deformed at the same time. Since the first moving part 107, the rear moving part 108, and the elastic parts of each support ring are symmetrically arranged about the traction tube, the first moving part 107 can be deformed in the same way on both sides of the traction tube. When the first support ring 101 squeezes the second When the support ring 103 is used, the deformation degree of the first moving part 107, the elastic part and the rear moving part 108 of the second support ring 103 on both sides of the traction tube is the same. Similarly, the deformation degree of the first moving part 107, the elastic part and the rear moving part 108 of the third support ring 105 on both sides of the traction tube is the same, so that the first, second and third support rings 105 can be stably deformed along the first direction 501. The simple structure improves the stability and reliability of the present application when used in the digestive tract, and the present application can adapt to the complex shape of the digestive tract and the complex physical and chemical environment.

[0066] The traction tube and the support ring guide each other in movement through the first through hole 109. Of course, the traction member 301 can not only be an elastic traction tube, but also a traction rope. The support ring can guide the movement of the traction rope. At the same time, the support ring can be unfolded in the digestive tract due to its own elasticity to open the net bag 401 and keep it in the unfolded state.

[0067] Technicians in the technical field to which the present application belongs can understand that the support ring can be a stainless steel ring woven from stainless steel wires, which can have a certain elasticity after heat treatment so that the support ring can be opened. Of course, the support ring can also be a rubber ring, or a composite material ring made of metal, rubber and other materials, which can perform the functions described above.

[0068] See also Figure 7 , Figure 8 In one embodiment of the present application, the leading moving part 107 of the same support ring is provided with a first clamping structure 601, and the trailing moving part 108 is provided with a second clamping structure 602 that can be clamped with the first clamping structure 601; when the support ring is in a closed state, the first clamping structure 601 is clamped with the second clamping structure 602 to limit the leading moving part 107 and the trailing moving part 108 of the same support ring from moving away from each other.

[0069] See also Figure 8The first clamping structure 601 and the second clamping structure 602 are both tubular structures. The first clamping structure 601 and the second clamping structure 602 are coaxially arranged and connected with the first through hole 109. The first clamping structure 601 is a plug, and the second clamping structure 602 is a socket. When the support ring is closed, the plug is inserted into the socket and clamped with the socket, thereby avoiding the situation that when the traction rope does not provide traction or the traction is small, the support ring, due to its own elasticity, makes the net bag 401 reconnected with the outside world, and the polyp 701 in the net bag 401 re-enters the digestive tract. Of course, the implementation method of the first clamping structure and the second clamping structure is not limited to the method described above, and can also be other structures, such as the first clamping structure and the second clamping structure are buckle structures, which will not be repeated here.

[0070] See also Fig. 9 In one embodiment of the present application, along the first direction 501, the depth of the net bag 401 connected to each supporting ring gradually decreases.

[0071] When each support ring of the present application enters the digestive tract, the entry direction is opposite to the first direction 501. The first support ring 101 enters the digestive tract first. When each support ring exits the digestive tract, the third support ring 105 exits the digestive tract first, along the first direction 501. When the last support ring is closed, the polyp 701 needs to be transported to the outside through the net bag 401. The amount of polyps 701 contained in each net bag 401 can be roughly the same. When the net bag 401 does not enter the outside through the clamp channel of the endoscope, the endoscope drags the net bag 401 to move in the digestive tract. The polyps 701 are deposited at the bottom of the net bag 401. Since the depths of each net bag 401 are different, the net bag connected to the third support ring 105 is the shallowest, and the net bag of the first support ring 101 is the deepest. Therefore, when each support ring exits the digestive tract along the first direction, the net bag connected to the first support ring 101 is located at the rear and does not overlap with the net bags connected to the second support ring 103 and the third support ring 105. The net bag connected to the second support ring 103 and the net bag connected to the third support ring 105 do not overlap, so that the polyps 701 in each net bag 401 will not pile up together. Fig.10 When the net bag 401 is dragged, each net bag 401 will not be stacked together due to the change in their respective depths, so that the net bag 401 carrying the polyp 701 can easily pass through the narrow digestive tract and enter the outside world.

[0072] See also Fig.11In one embodiment of the present application, the digestive tract polyp cutting and collection instrument also includes an operating handle and an operating rope 903, the operating handle includes an operating body 901 and a first operating member 902 that slidably cooperates with the operating body 901; the fixing member is a fixing tube 201, the fixing tube 201 can be a medical spring tube, one end of the fixing tube 201 is connected to the operating body 901, and the other end is fixedly connected to the rear moving part 108 of the last support ring along the first direction 501; one end of the operating rope 903 is connected to the traction rope and can drive the traction rope to move along the first direction 501, and the other end passes through the hollow channel of the fixing tube 201 and is fixedly connected to the first operating member 902, and the first operating member 902 can drive the traction rope to move along the first direction 501 through the operating rope 903.

[0073] Technicians in the technical field to which the present application belongs can understand that the combination formed by the net bag 401, the support ring, the traction member 301 and the fixing member in the present application can be wrapped by a sheath tube, and then sent into the digestive tract through the endoscopic forceps channel using the sheath tube, and then the sheath tube is pulled toward the operating handle to make the sheath tube retreat relative to the support ring and other components, so that the support ring and other components in the sheath tube are exposed in the digestive tract.

[0074] The present invention can enter the human digestive tract through the endoscopic forceps channel, or can directly enter the lower digestive tract through the anal canal in parallel with the endoscope.

[0075] It should be understood that although this specification is described according to various implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0076] The series of detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present application. They are not intended to limit the scope of protection of the present application. Any equivalent implementation scheme or changes that do not deviate from the technical spirit of the present application, such as combination, division or repetition of features, should be included in the scope of protection of the present application.

Claims

1. A digestive tract polyp cutting and collecting device, characterized in that: include: A fixing member, a front support ring, a rear support ring and a net bag, wherein the projection of each support ring on its cross section includes a first moving part, a rear moving part and an elastic part arranged between the first moving part and the rear moving part, each support ring is connected to a net bag, the rear moving part of the front support ring is connected to the first moving part of the rear support ring, and the fixing member is connected to the rear moving part of the rear support ring; and further comprising A traction member, wherein a traction end capable of moving along a first direction is connected to a first moving part of a front support ring, a first moving part and a rear moving part of the support ring are provided with first through holes, the first through holes penetrate through a side wall of the support ring, the traction member passes through each of the first through holes, the traction end is fixedly connected to the first moving part of the front support ring, the traction end can approach the fixing member along the first direction, and along the first direction, the traction end, the first moving part and the rear moving part of the front support ring, the first moving part and the rear moving part of the rear support ring, and the fixing member are sequentially arranged; The elastic force generated by the elastic part of the front support ring in the closed state is smaller than the elastic force generated by the elastic part of the rear support ring in the closed state. When the traction end moves to close the front support ring, the rear support ring is in an open state until the traction force of the traction end is larger than the elastic force generated by the elastic part of the rear support ring in the closed state. The combined action of the traction end and the fixing member closes the rear support ring, so that the front support ring and the rear support ring can be closed sequentially along the first direction.

2. The digestive tract polyp cutting and collecting device according to claim 1, characterized in that: The first through holes provided on each supporting ring are coaxially arranged, and the axial direction of each first through hole is parallel to the first direction.

3. The digestive tract polyp cutting and collecting device according to claim 2, characterized in that: The projections of the leading moving part and the trailing moving part on the cross section of the support ring are in an arc shape, and the arc openings of the leading moving part and the trailing moving part are oriented opposite to the first direction.

4. The digestive tract polyp cutting and collecting device according to claim 3, characterized in that: The first through hole is arranged at the center of the projection of the leading and trailing parts on the cross section of the support ring, and the projection of the traction member on the cross section of the support ring passes through the center of the projection of the leading and trailing parts on the cross section of the support ring.

5. The digestive tract polyp cutting and collecting device according to claim 1, characterized in that: The first moving part of the same support ring is provided with a first clamping structure, and the second moving part is provided with a second clamping structure capable of being clamped with the first clamping structure; When the support ring is in a closed state, the first clamping structure is clamped with the second clamping structure to restrict the first moving part and the second moving part of the same support ring from moving away from each other.

6. The digestive tract polyp cutting and collecting device according to claim 1, characterized in that: Along the first direction, the depth of the net bags connected to the supporting rings gradually decreases.

7. The digestive tract polyp cutting and collecting device according to claim 1, characterized in that: The digestive tract polyp cutting and collecting instrument further comprises an operating handle and an operating rope, wherein the operating handle comprises an operating body and a first operating member that slidably cooperates with the operating body; One end of the operating rope is connected to the traction member, and the other end is fixedly connected to the first operating member. The first operating member can drive the traction end to move along the first direction through the operating rope.

8. The digestive tract polyp cutting and collecting device according to claim 7, characterized in that: The fixing member is a fixing tube, one end of which is connected to the operating body, and the other end of which is fixedly connected to the rear moving part of the rear support ring; The operating rope passes through the hollow channel of the fixing tube and is fixedly connected with the first operating member.

9. The digestive tract polyp cutting and collecting device according to claim 1, characterized in that: The supporting ring includes a net bag end surface and a receiving end surface, and the net bag is arranged on the net bag end surface; The digestive tract polyp cutting and collecting instrument also includes a snare, the sheath of the snare is slidably connected to the fixing member, and the snare ring of the snare can move along the straight line direction where the first direction is located to pass through the receiving end surfaces of different support rings.

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