A clot cutting device in the stomach

Abstract

The application discloses a blood clot cutting device in a stomach, which comprises cutting strips, a working tube, gathering ropes and an elastic force part connected with the working tube and having elasticity; the cutting strips comprise connecting ends and gathering ends, the connecting ends are connected with the side wall of the working tube, the gathering ends are connected with the elastic force part, a plurality of cutting strips are arranged along the circumference of the working tube; the gathering ends of the plurality of cutting strips are away from the working tube under the elastic force of the elastic force part, so that the plurality of cutting strips are unfolded around the working tube and are in an unfolded state; the gathering ends of the plurality of cutting strips are connected with the gathering ropes, the plurality of gathering ropes converge at the working tube port of the working tube and pass through the working tube along the axis of the working tube; when the gathering ropes move along the axis of the working tube and pull the gathering ends to be close to the working tube port of the working tube, the plurality of cutting strips are switched from the unfolded state to a gathering state, the plurality of cutting strips can wrap the blood clot and cut the blood clot between the cutting strips, and the application can greatly improve the cutting speed of the blood clot in the stomach.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of medical devices, in particular to a blood clot cutting device in stomach. BACKGROUND

[0002] The stomach is an important digestive organ of the human body and is the largest digestive organ of the human body. It has the functions of storing food and digesting and absorbing. The stomach has left gastric artery, right gastric artery, right gastroepiploic artery, left gastroepiploic artery, short gastric artery, and posterior gastric artery. The stomach has a rich blood vessel system, and abundant blood supply ensures the normal physiological metabolic functions of the stomach, such as gastric juice secretion and gastric peristalsis, so that the stomach can perform grinding, digestion, transportation and other operations on food.

[0003] When the stomach is diseased or suffers from heavy damage, such as gastric ulcer, duodenal ulcer, esophageal gastric fundus varicosity rupture, foreign body scratch and other factors, leading to gastric bleeding. Digestive endoscopy is the most reliable standard for the diagnosis of gastric bleeding. Digestive endoscopy can help medical staff to directly observe the situation in the stomach, to determine the cause of gastric bleeding, and the position of gastric bleeding. To determine the type of gastric bleeding is acute or chronic gastric bleeding, to develop the corresponding treatment plan and treat the corresponding symptoms.

[0004] Because of the presence of various digestive fluids in the stomach, such as saliva, pepsin, gastric acid and other components, when the blood in the stomach comes into contact with the digestive fluids, the proteins and other components in the blood will denature, causing the blood to coagulate into clots. When the amount of bleeding is large, a large amount of irregularly shaped blood clots will appear in the stomach in a short time. When the patient moves, the blood clots in the stomach will move irregularly, causing the blood clots to form larger blood clots under the action of blood and digestive fluids. The blood clots affect the field of view of the gastroscope, which affects the medical staff's search for the bleeding point in the stomach through the gastroscope. Therefore, it is necessary to remove the blood clots in the stomach. Small blood clots in the stomach can be directly sucked out of the body through the suction line of the gastroscope, but the diameter of the suction line of the gastroscope is limited, and large blood clots will cause the suction line to be blocked, so that the suction line cannot directly suck large blood clots out of the body. Therefore, during clinical operations, medical staff will use surgical instruments such as snares to break up large blood clots to reduce the volume of large blood clots, so that the blood clots and blood in the stomach can be directly sucked out of the body through the suction line. However, when the amount of bleeding is large, there are many blood clots in the stomach. Due to the limited inner diameter of the instrument channel of the gastroscope, a snare is often used to cut a single large blood clot, and the position of the large blood clot also needs to be found before the snare is used to cut the large blood clot. The snare is then used to cut the large blood clot. Because the stomach contains blood and other substances, the situation in the stomach is complex, and the shape of the blood clot is irregular. Therefore, it is difficult to directly snare the large blood clot with the snare, which affects the cutting of the blood clot with the snare. In addition, the snare has a small snaring area, and the method of cutting blood clots with a snare is low in efficiency. If a rotary cutter is used to cut the large blood clot, the rotating blade may damage the stomach wall, which may increase the risk of stomach bleeding.

[0005] When a snare is used to cut blood clots, a surgical channel needs to be established using a gastroscope. The snare enters the patient's stomach through the surgical channel. When the gastroscope is used, the patient needs to be anesthetized. However, there is a limit to the amount of anesthetic used, so there is a limit to the amount of time available for surgery. Therefore, the more efficiently the blood clots in the stomach are cut, the longer the time available for other types of surgical operations. SUMMARY

[0006] In order to speed up the cutting of blood clots in the stomach and improve the cutting efficiency of blood clots, as much as possible surgical operations can be completed within a fixed anesthesia time, the present application provides a blood clot cutting device in the stomach.

[0007] The blood clot cutting device in stomach comprises a cutting strip, a working tube, a gathering rope, and an elastic force part connected with the working tube and having elasticity; the cutting strip comprises a connecting end and a gathering end, the connecting end is connected with the side wall of the working tube, the gathering end is connected with the elastic force part, and a plurality of cutting strips are arranged along the circumference of the working tube; the gathering ends of the plurality of cutting strips are away from the working tube under the elastic force of the elastic force part, so that the plurality of cutting strips are unfolded around the working tube and are in an unfolded state; the gathering ends of the plurality of cutting strips are connected with the gathering rope, the plurality of gathering ropes converge at the working tube port of the working tube and pass through the working tube along the axis of the working tube; when the gathering rope moves along the axis of the working tube and pulls the gathering ends close to the working tube port, the plurality of cutting strips are switched from the unfolded state to a gathered state.

[0008] After the plurality of cutting strips pass through the relatively narrow esophagus, the plurality of cutting strips can be in the unfolded state under the action of the elastic part, so that the plurality of cutting strips can have a larger capture range, the plurality of cutting strips cooperate with the gathering rope to easily capture larger blood clots, the cutting strips and the gathering rope cut the blood clots between the plurality of cutting strips by pulling the gathering ends through the gathering rope, so that the large blood clots are broken. The capture range is affected by the length of the cutting strip, the longer the cutting strip, the larger the area surrounded by the plurality of cutting strips for capturing blood clots, and the cutting strip can cut more and larger blood clots.

[0009] In an embodiment of the present application, the blood clot cutting device in stomach further comprises a sliding sleeve, the sliding sleeve is sleeved on the working tube and can move along the axis of the working tube, and the connecting end of each cutting strip is connected with the sliding sleeve.

[0010] The gathering end is located near the working tube port under the action of the gathering rope, the sliding sleeve moves away from the working tube port, thereby driving the connecting end away from the working tube port, so that the cutting strip is close to the outer side wall of the working tube, and the cutting effect of the cutting strip on the blood clots is enhanced.

[0011] In an embodiment of the present application, the blood clot cutting device in stomach further comprises an outer tube coaxially arranged with the working tube, the outer tube is fixedly connected with the working tube, the inner diameter of the outer tube is larger than the outer diameter of the working tube, and the sliding sleeve can move along the axis of the working tube between the outer tube and the working tube; when the sliding sleeve moves away from the working tube port along the working tube, the inner wall of the outer tube can press the cutting strip.

[0012] In an embodiment of the present application, the sliding sleeve is connected with the outer tube through an elastic member, the working tube comprises a working tube port arranged at one end and a connecting tube port arranged at the other end, and the elastic member gives the sliding sleeve a force directed from the connecting tube port to the working tube port.

[0013] In an embodiment of the present application, the blood clot cutting device in the stomach further comprises an operating handle, the operating handle comprising a handle body, a first operating member and a second operating member, the first operating member and the second operating member being in sliding fit with the handle body; the first operating member being connected with the gathering rope; the second operating member being connected with the sliding sleeve through a connecting rope.

[0014] In an embodiment of the present application, when the plurality of cutting strips are in the unfolded state, the plurality of cutting strips around the working tube form a tapered wrapping space; the working tube comprises a working tube opening provided at one end and a connecting tube opening provided at the other end, and the diameter of the wrapping space gradually increases along the direction from the connecting tube opening to the working tube opening.

[0015] By forming a tapered wrapping space around the working tube by the plurality of cutting strips, the working tube comprising a working tube opening provided at one end and a connecting tube opening provided at the other end, and the diameter of the wrapping space gradually increases along the direction from the connecting tube opening to the working tube opening, the blood clot can more easily enter the wrapping space surrounded by the plurality of cutting strips, thereby facilitating the cutting of the blood clot by the cutting strips.

[0016] In an embodiment of the present application, when the plurality of cutting strips are in the unfolded state, the angle between the projection of the extension direction of the cutting strip in the longitudinal section of the working tube and the axis of the working tube ranges from 30° to 75°.

[0017] By the plurality of cutting strips being in the unfolded state, the angle between the projection of the extension direction of the cutting strip in the longitudinal section of the working tube and the axis of the working tube ranges from 30° to 75°, the situation that the blood clot entering the wrapping space leaves the wrapping space and re-enters the stomach due to the angle between the projection of the extension direction of the cutting strip in the longitudinal section of the working tube and the axis of the working tube being too large is avoided.

[0018] In an embodiment of the present application, when the plurality of cutting strips are in the unfolded state, the plurality of cutting strips around the working tube form a wrapping space; the working tube opening of the working tube is located in the wrapping space.

[0019] In an embodiment of the present application, the adjacent cutting strips are connected by a plurality of flexible cutting members.

[0020] In an embodiment of the present application, the cutting strip comprises an elastic portion, the elastic portion being provided between the connecting end and the gathering end, and the elastic portion being connected with the working tube through the connecting end.

[0021] The cutting strip comprising the elastic portion has the advantages of simpler setting of the elastic portion, simpler connection relationship between the cutting strip and the sidewall of the working tube, reduced failure rate, and higher safety and reliability of the present application.

[0022] The present application has at least the following beneficial effects:

[0023] 1. The plurality of gathering ends gradually converge towards the working pipe opening, and the plurality of cutting strips gradually converge towards the working pipe, so that the cutting strips will squeeze and cut the blood clots, making the blood clots broken, facilitating the subsequent cutting of blood clots by the suction device.

[0024] 2. The plurality of cutting strips are arranged around the working pipe and can be switched between the expanded state and the gathered state to capture and cut the blood clots multiple times, and when the plurality of cutting strips are in the expanded state, a relatively three-dimensional structure can be formed, which is beneficial to capturing blood clots and can significantly improve the cutting efficiency.

[0025] 3. As each gathering end continuously approaches the working pipe opening, the spacing between adjacent cutting strips is continuously reduced, and the spacing between the gathering ropes connecting the gathering ends is also reduced, thereby avoiding the blood clots captured by the plurality of cutting strips from leaving the area surrounded by the plurality of cutting strips. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic diagram of an illustrative embodiment of the present application;

[0027] Figure 2 is a structural schematic diagram of an illustrative embodiment of the connection end and the gathering end in the present application;

[0028] Figure 3 is a structural schematic diagram of an illustrative embodiment of the present application when capturing blood clots in cooperation with a gastroscope;

[0029] Figure 4 is a structural schematic diagram of an illustrative embodiment of the wrapping space in the present application;

[0030] Figure 5 is a structural schematic diagram of an illustrative embodiment of the gathering end approaching the working pipe opening in the present application;

[0031] Figure 6 is a structural schematic diagram of another illustrative embodiment of the cutting strip in the present application;

[0032] Figure 7 is a structural schematic diagram of an illustrative embodiment of the connection of another cutting strip and the gathering rope;

[0033] Figure 8 is a structural schematic diagram of an illustrative embodiment of the fixed connection of the working pipe and the outer pipe in the present application;

[0034] Figure 9 is a structural schematic diagram of an illustrative embodiment of the sliding sleeve in the present application;

[0035] Figure 10 is a structural schematic diagram of an illustrative embodiment of the sliding sleeve side wall provided with a through slot in the present application;

[0036] Figure 11 is a structural schematic view of a schematic embodiment of the retraction rope connecting with the first operating member in the present application

[0037] Figure 12 is a structural schematic view of a schematic embodiment of the operating handle in the present application.

[0038] In the drawings:

[0039] 101, cutting strip; 102, connecting end; 103, retraction end; 104, wrapping inlet; 105, wrapping space; 106, flexible cutting member;

[0040] 201, working tube; 202, working tube inlet; 203, connecting tube inlet;

[0041] 301, retraction rope;

[0042] 401, sliding sleeve; 402, through slot;

[0043] 501, outer tube; 502, compression spring;

[0044] 601, handle main body; 602, first operating member; 603, second operating member; 604, connecting rope; 605, sheath tube;

[0045] 701, gastroscope; 702, blood clot. DETAILED DESCRIPTION

[0046] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described with reference to the drawings, in which the same reference numerals represent the same or similar parts having the same function.

[0047] In this document, "schematic" means "serving as an example, instance or illustration", and any drawing, embodiment described as "schematic" in this document should not be interpreted as a more preferred or more advantageous technical solution.

[0048] In order to make the drawings simple, only the parts related to the present application are schematically shown in the drawings, which do not represent the actual structure of the product. In addition, in order to make the drawings simple and easy to understand, in some drawings, only one of the parts having the same structure or function is schematically shown, or only one of them is marked.

[0049] Please refer to Figures 1 to 12 to understand the present application.

[0050] Please refer to Figure 1A blood clot cutting device in stomach comprises a cutting strip 101, a working tube 201, a gathering rope 301, and an elastic part connected with the working tube 201.

[0051] In an embodiment of the present application, the cutting strip 101 is elastic by itself, and the cutting strip 101 comprises an elastic part, a connecting end 102 and a gathering end 103, the elastic part is arranged between the connecting end 102 and the gathering end 103, the connecting end 102 is connected with the side wall of the working tube 201, see Figure 1 The connecting end 102 is indirectly connected with the side wall of the working tube 201 through a structure, of course, the connecting end 102 of the cutting strip 101 can be directly connected with the side wall of the working tube 201 without other structures, which will not be described here.

[0052] The elastic part is connected with the side wall of the working tube 201 through the connecting end 102, the gathering end 103 is connected with the elastic part, and a plurality of cutting strips 101 are arranged along the circumference of the working tube 201, i.e. the plurality of cutting strips 101 are arranged around the working tube 201 and connected with the working tube 201.

[0053] See Figures 1 to 3 The gathering end 103 of the plurality of cutting strips 101 is away from the working tube 201 under the elastic force of the elastic part, so that the plurality of cutting strips 101 are unfolded around the working tube 201 and in an unfolded state, and the plurality of cutting strips 101 around the working tube 201 form a conical wrapping space 105 when the plurality of cutting strips 101 are in the unfolded state; the working tube 201 comprises a working tube opening 202 arranged at one end and a connecting tube opening 203 arranged at the other end, and the diameter of the wrapping space 105 gradually increases along the direction from the connecting tube opening 203 to the working tube opening 202; so that the plurality of cutting strips 101 surround the wrapping space 105 around the working tube 201, the gathering end 103 of the plurality of cutting strips 101 surrounds a wrapping inlet 104, the wrapping inlet 104 is in communication with the wrapping space 105, so that a larger blood clot 702 can enter the wrapping space 105 through the wrapping inlet 104. The blood clot 702 can enter the wrapping space 105 through the wrapping inlet 104 and the interval between adjacent cutting strips 101.

[0054] See Figure 4 In an embodiment of the present application, when the plurality of cutting strips 101 are in the unfolded state, the projection of the extension direction of the cutting strip 101 in the longitudinal section of the working tube 201 and the axis of the working tube 201 form an angle in the range of 30° to 75°, so as to ensure that the wrapping inlet 104 is large enough to allow more blood clots 702 to enter the wrapping space 105.

[0055] The gathering ends 103 of the plurality of cutting strips 101 are connected with the gathering ropes 301, the plurality of gathering ropes 301 converge at the working tube opening 202 of the working tube 201, and pass through the working tube 201 along the axis of the working tube 201 to the connecting tube opening 203 of the working tube 201. The gathering ropes 301 move along the axis of the working tube 201 to pull the gathering ends 103 close to the working tube opening 202 of the working tube 201, and the plurality of cutting strips 101 are switched from the unfolded state to the gathered state, as shown in Figure 4 When the gathering ropes 301 in the working tube 201 move downward, the plurality of gathering ropes 301 connected with the gathering ends 103 are pulled to move toward the working tube opening 202, and the plurality of cutting strips 101 can wrap the blood clots 702 and cut the blood clots 702 between the cutting strips 101. When the gathering ropes 301 are pulled from the working tube opening 202 to the connecting tube opening 203, the gathering ends 103 of the cutting strips 101 are pulled to the working tube opening 202 of the working tube 201 at the middle position, so that the wrapping inlet 104 gradually decreases, and the blood clots 702 cannot exit the wrapping space 105 through the wrapping inlet 104, as shown in Figure 5 As the plurality of gathering ends 103 gradually move close to the working tube opening 202, the plurality of cutting strips 101 gradually move close to the working tube 201, and at the same time, the maximum interval between the gathering ropes 301 connecting adjacent gathering ends 103 is also decreasing. The gathering ropes 301 can limit the blood clots 702 from exiting the wrapping space 105 surrounded by the plurality of cutting strips 101, so that the cutting strips 101 and the gathering ropes 301 squeeze and cut the blood clots 702 in the wrapping space 105, so that the blood clots 702 in the wrapping space 105 and the blood clots 702 between adjacent cutting strips 101 are broken, facilitating subsequent suction of the cut blood clots 702 to the outside by the suction device.

[0056] During this process, as each gathering end 103 continuously moves close to the working tube opening 202, the interval between adjacent cutting strips 101 continuously decreases, thereby reducing the blood clots 702 in the wrapping space 105 from exiting the wrapping space 105 through the interval between adjacent cutting strips 101.

[0057] Referring to Figure 3The present application can be used with endoscope instruments such as gastroscope 701 which has an instrument channel. Since the diameter of the instrument channel is small, the plurality of cutting strips 101 can be adjusted to a retracted state so that the plurality of cutting strips 101 are gathered on the side wall of the working tube 201. When the cutting strips 101 pass through the instrument channel to the stomach, the cutting strips 101 can switch to an expanded state under the action of the elastic portion itself when the cutting strips 101 exit the instrument channel, so that the wrapping inlet 104 can cover a larger area in the stomach, and the wrapping space 105 can cover a larger space in the stomach, so that the wrapping space 105 is more likely to capture blood clots 702 in the stomach. Then, the retracted end 103 of the cutting strip 101 is pulled towards the working tube opening 202 by the gathering rope 301, and the plurality of cutting strips 101 capture the blood clots 702 in the stomach and cut the blood clots 702 in the wrapping space 105. In this process, the axis of the working tube 201 is in the same direction as the axis of the instrument channel of the gastroscope 701. The working tube 201 cooperates with the gathering rope 301 and the elastic portion to form a wrapping space 105 that is not easily deformed, and the wrapping inlet 104 can be in a state parallel to the end face of the gastroscope 701, so that when the gastroscope 701 advances, the wrapping inlet 104 can directly capture the blood clots 702, making it easier for the blood clots 702 to enter the wrapping space 105, and avoiding interference of the cutting strips 101 with the blood clots 702 entering the wrapping space 105. Compared with the traditional snare, the present application can capture blood clots 702 in a more three-dimensional structure, while the snare can only handle one blood clot 702 at a time, so the present application greatly improves the cutting speed of the blood clots 702, and provides more time for the patient to perform other surgical operations.

[0058] Those skilled in the art to which the present application pertains will understand that the number of gathering ropes 301 should not be too large, so as not to interfere with the blood clots 702 passing through the wrapping inlet 104 into the wrapping space 105. The plurality of gathering ropes 301 can be woven into a strand of gathering ropes 301 in the working tube 201, so that the strand of gathering ropes 301 in the working tube 201 moves along the internal channel of the working tube 201 from the working tube opening 202 to the connecting tube opening 203, which can make the plurality of retracted ends 103 move towards the working tube opening 202 at the same time; of course, the plurality of gathering ropes 301 can also move independently of each other, so that the distance between the individual retracted end 103 and the working tube opening 202 can be different from the distance between the other retracted ends 103 and the working tube opening 202.

[0059] Of course, those skilled in the art of the present application can understand that the shape of the cutting strip 101 in the present application is not limited to a strip shape, but can also be other shapes, such as a mesh shape, one end of the cutting strip 101 is connected to the working tube 201, the other end is connected to the gathering rope 301, the middle part of the cutting strip 101 is a mesh structure woven by stainless steel wires, or the cutting strip 101 is a specific shape structure with elasticity, see Figure 6 , Figure 7 .

[0060] Those skilled in the art of the present application can understand that the cutting strip 101 in the present application can be woven by heat-treated stainless steel wires, which has a certain shape and also has a certain elasticity, or can be a plastic strip made of medical PVC, or other materials that can make the cutting strip 101 have elasticity.

[0061] Of course, those skilled in the art of the present application can understand that the elastic part in the present application is not limited to the elastic part being a part of the cutting strip 101 itself having elasticity, but can also be an additional component, such as a torsion spring, the cutting strip 101 is pivotally connected to the outer wall of the working tube 201, the cutting strip 101 can rotate in the longitudinal section of the working tube 201, and a torsion spring is sleeved on the pivot shaft between the cutting strip 101 and the working tube 201, so that the cutting strip 101 ensures a certain angle relative to the working tube 201 under the action of the torsion spring.

[0062] Referring to Figures 1 to 3 In an embodiment of the present application, the adjacent cutting strips 101 are connected by a plurality of flexible cutting members 106, the flexible cutting member 106 connects two adjacent cutting strips 101, so that the cutting strip 101 and the flexible cutting member 106 form a structure similar to a mesh, so as to better capture the blood clots 702 in the stomach, and avoid the blood clots 702 from leaving the wrapping space 105 through the gap between the adjacent cutting strips 101.

[0063] Referring to Figure 4 In an embodiment of the present application, when the plurality of cutting strips 101 are in an expanded state, the plurality of cutting strips 101 surrounding the working tube 201 form a wrapping space 105; the working tube port 202 of the working tube 201 is located in the wrapping space 105.

[0064] When the gathering rope 301 pulls the gathering end 103 of the cutting strip 101 to move towards the working pipe orifice 202, the gathering end 103 moves towards the wrapping space 105, and the blood clot 702 is wrapped from outside to inside by the gathering end 103, and the blood clot 702 leaves the wrapping space 105 through the wrapping orifice 104, so that the cutting strip 101, the gathering rope 301 and the working pipe 201 jointly wrap the blood clot 702, and the blood clot 702 is cut due to the loose texture of the blood clot 702 and the extrusion of the cutting strip 101, the gathering rope 301 and the working pipe 201.

[0065] Referring to Figures 8 to 9 In an embodiment of the present application, the blood clot 702 cutting device in the stomach further comprises an outer pipe 501 coaxially arranged with the working pipe 201, the outer pipe 501 is fixedly connected with the working pipe 201, the inner diameter of the outer pipe 501 is greater than the outer diameter of the working pipe 201, the blood clot 702 cutting device in the stomach further comprises a sliding sleeve 401, the sliding sleeve 401 is sleeved on the working pipe 201 and can move along the axial direction of the working pipe 201, and the connecting end 102 of each cutting strip 101 is connected with the sliding sleeve 401. The sliding sleeve 401 is in sliding fit with the inner wall of the outer pipe 501 and the outer lateral wall of the working pipe 201, the working pipe 201 is fixedly connected with the outer pipe 501, and the sliding sleeve 401 can move along the axial direction of the working pipe 201 between the outer pipe 501 and the working pipe 201; when the sliding sleeve 401 moves along the working pipe 201 towards the connecting pipe orifice 203, the connecting end 102 of the cutting strip 101 gradually enters the outer pipe 501, so that the inner wall of the outer pipe 501 can extrude the cutting strip 101 to extrude the blood clot 702 in the wrapping space 105 formed by the plurality of cutting strips 101, so that the blood clot 702 is broken.

[0066] When the connecting end 102 moves along the axial direction of the working pipe 201 towards the connecting pipe orifice 203, the gathering end 103 of the cutting strip 101 is close to the working pipe orifice 202 of the working pipe 201 under the action of the gathering rope 301, and the connecting end 102 is close to the connecting pipe orifice 203, so that the space of the wrapping space 105 gradually becomes smaller, and the whole cutting strip 101 gradually approaches the working pipe 201, thereby enhancing the cutting effect of the cutting strip 101 on the blood clot 702.

[0067] When the components in the present application pass through the esophagus and enter the stomach of the patient through the throat through the gastroscope 701, the cutting strip 101, the flexible cutting member 106 and the working pipe 201 in the present application can be first retracted into the outer pipe 501, and then pass through the channel of the gastroscope 701, so as to prevent the cutting strip 101 from being stuck in the instrument channel.

[0068] Those skilled in the art of the present application can understand that the sliding sleeve 401 in the present application can also be only in sliding fit with the outer side wall of the working tube 201, or the sliding sleeve 401 is only in sliding fit with the inner wall of the outer tube 501, which can be sleeved on the working tube 201 and can move along the axial direction of the working tube 201.

[0069] Those skilled in the art of the present application can understand that there are various implementation manners for the fixed connection of the outer tube 501 and the working tube 201, see Figure 8 、 Figure 9 、 Figure 10 The side wall of the sliding sleeve 401 is provided with a through slot 402 along the axial direction thereof, so that the inner wall of the outer tube 501 is connected with the outer wall of the working tube 201 through a fixed connection structure passing through the through slot 402, and when the sliding sleeve 401 moves along the axial direction of the working tube 201, the existence of the through slot 402 makes the fixed connection structure between the outer tube 501 and the working tube 201 not hinder the movement of the sliding sleeve 401.

[0070] See Figure 8 、 Figure 9 In an embodiment of the present application, the sliding sleeve 401 is connected with the outer tube 501 through an elastic member, the working tube 201 includes a working tube port 202 arranged at one end and a connecting tube port 203 arranged at the other end, and the elastic member gives the sliding sleeve 401 a force directed from the connecting tube port 203 to the working tube port 202.

[0071] Those skilled in the art of the present application can understand that the elastic member in the present application can be a compression spring 502, see Figure 8 、 Figure 9 Under the action of the spring, when the sliding sleeve 401 approaches the connecting tube port 203, the sliding sleeve 401 presses the spring, the spring is elastically deformed, and gives the sliding sleeve 401 a force directed from the connecting tube port 203 to the working tube port 202. When the cutting strip 101 completes the cutting of the blood clot 702, or the cutting strip 101 needs to be stretched out of the outer tube 501, the sliding sleeve 401 is no longer subjected to the force directed from the working tube port 202 to the connecting tube port 203, and the compression spring 502 can assist the sliding sleeve 401 to move towards the working tube port 202, so that the cutting strip 101 is stretched out of the outer tube 501.

[0072] In an embodiment of the present application, see Figures 8 to 12The blood clot 702 cutting device in the stomach further comprises an operating handle, the operating handle comprising a handle body 601, a first operating member 602 and a second operating member 603, the first operating member 602 and the second operating member 603 being in sliding fit with the handle body 601; the first operating member 602 being connected with the gathering rope 301; the second operating member 603 being connected with the sliding sleeve 401 through a connecting rope 604, the gathering rope 301 being connected with the first operating member 602 through the hollow structure of the connecting rope 604, in order to avoid mutual interference between the connecting rope 604 and the gathering rope 301, a sheath 605 can be arranged between the gathering rope 301 and the connecting rope 604 to avoid interference between the connecting rope 604 and the gathering rope 301.

[0073] It should be understood that, although the present specification is described in terms of various embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

[0074] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present application, and are not intended to limit the protection scope of the present application, and any equivalent embodiments or changes made without departing from the spirit of the present application, such as the combination, division or repetition of features, should be included in the protection scope of the present application.

Claims

1. A blood clot cutting device in the stomach, characterized by, The cutting strip, the working tube and the gathering rope, and the elastic force part connected with the working tube and having elasticity; The cutting strip includes a connecting end and a gathering end, the gathering end is connected with the elastic force part, and a plurality of the cutting strips are arranged along the circumference of the working tube; The gathering ends of the plurality of cutting strips are away from the working tube under the elastic force of the elastic force part, so that the plurality of cutting strips are unfolded around the working tube and are in an unfolded state; The gathering ends of the plurality of cutting strips are connected with the gathering rope, and the plurality of gathering ropes converge at the working tube opening of the working tube and pass through the working tube along the axis of the working tube; When the gathering rope moves along the axis of the working tube to pull the gathering ends close to the working tube opening of the working tube, the plurality of cutting strips are switched from the unfolded state to a gathering state; The gastric blood clot cutting device further comprises a sliding sleeve, the sliding sleeve is sleeved on the working tube and can move along the axis of the working tube, the connecting end of each cutting strip is connected with the sliding sleeve, and when the plurality of cutting strips are switched from the unfolded state to the gathering state, the sliding sleeve can move along the axis of the working tube in a direction away from the working tube opening of the working tube; The gastric blood clot cutting device further comprises an outer tube coaxially arranged with the working tube, the outer tube is fixedly connected with the working tube, the inner diameter of the outer tube is greater than the outer diameter of the working tube, and the sliding sleeve can move along the axis of the working tube between the outer tube and the working tube; When the sliding sleeve moves along the working tube in a direction away from the working tube opening, the inner wall of the outer tube can extrude the cutting strip; The sliding sleeve is connected with the outer tube through an elastic member, the working tube includes the working tube opening arranged at one end and a connecting tube opening arranged at the other end, and the elastic member gives the sliding sleeve a force in a direction from the connecting tube opening to the working tube opening.

2. The gastric blood clot cutting device according to claim 1, further comprising an operating handle, the operating handle including a handle body, a first operating member and a second operating member, the first operating member and the second operating member being in sliding cooperation with the handle body. The first operating member is connected with the gathering rope. The second operating member is connected with the sliding sleeve through a connecting rope.

3. The gastric blood clot cutting device according to claim 1, wherein when the plurality of cutting strips are in the unfolded state, the plurality of cutting strips around the working tube form a conical wrapping space. The working tube includes the working tube opening arranged at one end and the connecting tube opening arranged at the other end, and the diameter of the wrapping space gradually increases in a direction from the connecting tube opening to the working tube opening.

4. The gastric blood clot cutting device according to claim 3, wherein when the plurality of cutting strips are in the unfolded state, the plurality of cutting strips around the working tube form a wrapping space. The working tube opening of the working tube is located in the wrapping space.

5. The gastric blood clot cutting device according to claim 1, wherein ​ ​ ​ The angle between the projection of the extension direction of the cutting strip in the longitudinal section of the working tube and the working tube axis ranges from 30° to 75° when the plurality of cutting strips are in the unfolded state.

6. The blood clot cutting device in stomach according to claim 1, characterized in that, The adjacent cutting strips are connected by a plurality of flexible cutting members.

7. The blood clot cutting device in stomach according to claim 1, characterized in that, The cutting strip comprises the elastic portion, the elastic portion is arranged between the connecting end and the folding end, and the elastic portion is connected with the working tube through the connecting end.

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