Lesion cutting device

Abstract

The utility model discloses a lesion cutting device which comprises an outer tube, the far end of the outer tube is a closed end, the side wall close to the far end of the outer tube is provided with a first opening portion used for containing lesion tissue to be cut off, the near end of the outer tube is provided with a first outlet, and the first opening portion is communicated with the first outlet; the cutting assembly comprises a cutting piece and a driving piece, the cutting piece is located in the outer pipe, and the driving piece is used for driving the cutting piece to move in the outer pipe so that the cutting edge of the cutting piece can cut the to-be-cut diseased tissue entering the outer pipe from the first opening part; the negative pressure device comprises a first negative pressure pipeline, one end of the first negative pressure pipeline is communicated with the first outlet, and the other end of the first negative pressure pipeline is used for being communicated with an air inlet of negative pressure generation equipment; and the backflow prevention assembly is used for opening and closing the first negative pressure pipeline so as to prevent fluid in the first negative pressure pipeline from flowing towards the outer pipe.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and in particular to a lesion cutting device. Background Technology

[0002] Lesion removal procedures generally refer to the process in the medical field of removing or treating diseased tissue through surgery or other medical means. This procedure can be used to treat a variety of diseases, including the removal of diseased tissues such as tumors, proliferating tissues, and diseased organs.

[0003] Taking a narrowing of a blood vessel due to hyperplasia as an example, the treatment of this lesion requires the removal of the hyperplastic intima to restore blood flow. This is typically achieved through plaque excision, where a puncture is made in the diseased tissue, and a plaque excision catheter is used to remove the plaque obstructing blood flow, thus eliminating the narrowing and creating a smooth lumen. However, plaque excision is expensive and complex, usually requiring two or more surgeons. It demands a high level of skill from the surgeons and carries a risk of perforation due to improper technique. Alternatively, the narrowed blood vessel can be cut open, and the hyperplastic tissue scraped away with a scalpel to restore blood flow. However, this procedure is highly invasive and increases the patient's pain burden.

[0004] Therefore, how to facilitate the removal of diseased tissue is a problem that urgently needs to be solved by those in this technical field. Utility Model Content

[0005] In view of this, the present invention provides a lesion cutting device to facilitate the removal of lesion tissue.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A lesion cutting device, comprising:

[0008] The outer tube has a closed end at its distal end and a first opening on the side wall near the distal end of the outer tube for receiving the lesion tissue to be removed. The proximal end of the outer tube has a first outlet, and the first opening communicates with the first outlet.

[0009] A cutting assembly, comprising a cutting element and a driving element, wherein the cutting element is located inside the outer tube, and the driving element is used to drive the cutting element to move within the outer tube so that the cutting edge of the cutting element cuts the lesion tissue to be removed that enters the outer tube from the first opening;

[0010] A negative pressure device, the negative pressure device including a first negative pressure pipe, one end of the first negative pressure pipe being connected to the first outlet, and the other end being used to connect to the air inlet of a negative pressure generating device;

[0011] An anti-backflow component is used to open and close the first negative pressure pipe to prevent fluid in the first negative pressure pipe from flowing into the outer pipe.

[0012] Optionally, in the above-mentioned lesion cutting device, one end of the first negative pressure pipe extends into the outer tube through the first outlet;

[0013] The anti-backflow component is located at one end of the first negative pressure pipe.

[0014] Optionally, in the above-mentioned lesion cutting device, the anti-backflow component is a baffle for closing the first negative pressure pipe. The baffle can open the first negative pressure pipe when subjected to a force opposite to the distal end of the outer pipe, and can close the first negative pressure pipe when subjected to a force toward the distal end of the outer pipe.

[0015] Optionally, in the above-mentioned lesion cutting device, the anti-backflow component has a baffle plate, which is rotatably connected to the first negative pressure pipe, and the baffle plate can close one end of the first negative pressure pipe;

[0016] Alternatively, the anti-backflow assembly has at least two baffles, which are rotatably connected to the first negative pressure pipe, and the combined plate structure formed by the at least two baffles can close one end of the first negative pressure pipe.

[0017] Optionally, the above-mentioned lesion cutting device further includes an elastic reset device, which can provide the baffle to close one end of the first negative pressure pipe.

[0018] Optionally, in the above-mentioned lesion cutting device, the cutting element is a tubular structure, and the outer wall of the cutting element cooperates with the inner wall of the outer tube;

[0019] The cutting edge is located near the distal end of the cutting element, and the proximal end of the cutting element is connected to the first negative pressure pipe.

[0020] Optionally, in the above-mentioned lesion cutting device, one end of the first negative pressure pipe extends into the cutting element through the first outlet, and the outer wall of the first negative pressure pipe cooperates with the inner wall of the cutting element.

[0021] The cutting member has a second opening, the edge of which is the cutting edge; the driving member drives the cutting member to rotate inside the outer tube so that the second opening can be aligned with or offset from the first opening.

[0022] Optionally, in the above-mentioned lesion cutting device, one end of the first negative pressure pipe extends into the cutting element through the first outlet, and the outer wall of the first negative pressure pipe cooperates with the inner wall of the cutting element.

[0023] The distal edge of the cutting member is the cutting edge; the driving member drives the cutting member to move inside the outer tube so that the cutting edge can move along the first opening.

[0024] Optionally, in the above-mentioned lesion cutting device, the outer tube has a first negative pressure chamber and a second negative pressure chamber inside, the proximal end of the first negative pressure chamber is the first outlet, and the proximal end of the second negative pressure chamber is the second outlet;

[0025] The first opening is connected to the first negative pressure chamber, and the first negative pressure chamber and the second negative pressure chamber are connected by a through hole, which is provided corresponding to the first opening.

[0026] The negative pressure device also includes a second negative pressure pipe, one end of which is connected to the second outlet, and the other end is used to connect to the air inlet of the negative pressure generating device.

[0027] Optionally, the above-mentioned lesion cutting device further includes a handheld part for being held by an operator, the handheld part being connected to the outer tube;

[0028] The handheld part has a first mounting groove, and the first negative pressure pipe is at least partially located within the first mounting groove.

[0029] As can be seen from the above technical solution, the lesion cutting device provided by this utility model, during the cutting of the lesion tissue to be removed, allows the operator to manipulate the proximal end of the outer tube, causing the outer tube to move relative to the biological structural wall to a predetermined position. The negative pressure generated by the negative pressure device allows the lesion tissue to be removed to enter the distal end of the outer tube through the first opening. The driving component drives the cutting component to move inside the outer tube, causing the cutting edge of the cutting component to cut the lesion tissue to be removed, thus separating the lesion tissue from the non-lesion tissue. Since the cutting component is located inside the outer tube, the lesion tissue to be removed is located inside the outer tube after being cut. The first outlet of the outer tube is connected to the air inlet of the negative pressure generating device through the first negative pressure pipe of the negative pressure device. Under the action of negative pressure, the anti-backflow component opens the first negative pressure pipe, ensuring that the cut lesion tissue moves from the first outlet to the negative pressure generating device through the first negative pressure pipe, away from the non-lesion tissue (excreted from the body). In the event of an accident (such as a shutdown of the negative pressure generating equipment or other negative pressure failure), the anti-backflow component prevents fluid in the first negative pressure pipe from flowing into the outer pipe. This prevents the flow of cut lesion tissue or other impurities along the first negative pressure pipe into the outer pipe, thus preventing contamination of non-lesion tissue. Through this design, the cutting operation combined with negative pressure allows for effective cutting of lesion tissue while avoiding backflow of lesion tissue that could contaminate non-lesion tissue, facilitating the removal of lesion tissue. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A schematic diagram of the first main view structure of the lesion cutting device provided in an embodiment of this utility model;

[0032] Figure 2 A first perspective structural schematic diagram of the lesion cutting device provided in an embodiment of this utility model;

[0033] Figure 3 A three-dimensional structural schematic diagram of the first type of outer tube provided in this embodiment of the utility model;

[0034] Figure 4 This is a schematic diagram of the main structure of the first type of outer tube provided in this embodiment of the utility model;

[0035] Figure 5 A top view of the first type of outer tube provided in this embodiment of the utility model;

[0036] Figure 6 A right-side view of the structure of the first type of outer tube provided in this embodiment of the utility model;

[0037] Figure 7 A schematic diagram of the structure of the first cutting component provided in the embodiment of the utility model;

[0038] Figure 8 for Figure 1 A partial cross-sectional view of the first state of section A;

[0039] Figure 9 for Figure 1 A partial cross-sectional view of the second state of part A in the middle;

[0040] Figure 10 for Figure 1 The second partial cross-sectional view of the second state in part A;

[0041] Figure 11 for Figure 1 A partial cross-sectional view of section B in the middle section;

[0042] Figure 12 for Figure 1 A partial cross-sectional view of section C in the middle;

[0043] Figure 13 This is a second main view schematic diagram of the lesion cutting device provided in an embodiment of the present utility model;

[0044] Figure 14 This is a schematic diagram of the main structure of the second type of outer tube provided in an embodiment of the present utility model;

[0045] Figure 15 A top view of the second type of outer tube provided in this embodiment of the utility model;

[0046] Figure 16 A schematic diagram of the structure of the second cutting component provided in the embodiment of the utility model;

[0047] Figure 17 for Figure 13 A partial cross-sectional view of the first state of section D;

[0048] Figure 18 for Figure 13 The first partial cross-section of the second state in part D;

[0049] Figure 19 for Figure 13 The second type of local cross-section of the second state in part D;

[0050] Figure 20 for Figure 13 A partial cross-sectional view of section E in the middle;

[0051] Figure 21 for Figure 13 A partial cross-sectional view of section F in the middle;

[0052] in,

[0053] Outer tube-1, first opening-101, first negative pressure chamber-102, second negative pressure chamber-103, through hole-104, marking strip-105, cutting piece-2, second opening-201, first negative pressure pipe-3, anti-backflow assembly-301, handheld part-4, second marking seat-401, third marking seat-402, push-pull handle-501, rotating handle-502, first marking seat-503, collection device-6, collection basket-601, outlet-602, first conduit-7, second negative pressure pipe-8, fixing bracket-9. Detailed Implementation

[0054] This utility model discloses a lesion cutting device to facilitate the removal of diseased tissue.

[0055] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0056] To enable those skilled in the art to better understand the technical solutions provided by the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0057] It should be noted that the terms "proximal" and "distal" in this article refer to "proximal" and "distal" relative to the operator. The end closer to the operator is called the "proximal" end, and the end farther from the operator is called the "distal" end.

[0058] like Figure 1 and Figure 2As shown, this utility model embodiment provides a lesion cutting device, including an outer tube 1, a cutting assembly, a negative pressure device, and an anti-backflow assembly 301. The distal end of the outer tube 1 is a closed end, and the side wall near the distal end of the outer tube 1 has a first opening 101 for accommodating the lesion tissue to be removed. The proximal end of the outer tube 1 has a first outlet, and the first opening 101 communicates with the first outlet. The proximal end is the end closer to the operator, and the distal end is the end farther from the operator. The cutting assembly includes a cutting element 2 and a driving element. The cutting element 2 is located inside the outer tube 1, and the driving element drives the cutting element 2 to move within the outer tube 1, so that the cutting edge of the cutting element 2 cuts the lesion tissue to be removed that enters the outer tube 1 through the first opening 101. The negative pressure device includes a first negative pressure pipe 3, one end of which communicates with the first outlet, and the other end is used to communicate with the air inlet of a negative pressure generating device. The anti-backflow assembly 301 is used to open and close the first negative pressure pipe 3 to prevent fluid in the first negative pressure pipe 3 from flowing into the outer tube 1.

[0059] The lesion cutting device provided in this embodiment of the utility model, during the cutting of the lesion tissue to be removed, through the operation of the operator at the proximal end of the outer tube 1, causes the outer tube 1 to move relative to the biological structural wall to a predetermined position. The negative pressure generated by the negative pressure device allows the lesion tissue to be removed to enter the distal end of the outer tube 1 through the first opening 101. The driving member drives the cutting member 2 to move inside the outer tube 1, so that the cutting edge of the cutting member 2 cuts the lesion tissue to be removed, thereby separating the lesion tissue from the non-lesion tissue. Since the cutting member 2 is located inside the outer tube 1, the lesion tissue to be removed is located inside the outer tube 1 after being cut. The first negative pressure pipe 3 of the negative pressure device connects the first outlet of the outer tube 1 to the air inlet of the negative pressure generating device. Under the action of negative pressure, the anti-backflow component 301 opens the first negative pressure pipe 3, ensuring that the cut lesion tissue moves from the first outlet to the negative pressure generating device through the first negative pressure pipe 3, so as to move away from the non-lesion tissue (excreted from the body). In the event of an accident (such as a shutdown of the negative pressure generating equipment or other negative pressure failure), the anti-backflow component 301 prevents fluid in the first negative pressure pipe 3 from flowing to the outer pipe 1. That is, it prevents the flow of cut lesion tissue or other impurities along the first negative pressure pipe 3 to the outer pipe 1, thus preventing contamination of non-lesion tissue. Through this configuration, the cutting operation combined with negative pressure enables effective cutting of lesion tissue while avoiding backflow of lesion tissue that could contaminate non-lesion tissue, facilitating the removal of lesion tissue.

[0060] like Figure 3 , Figure 4 and Figure 5 As shown, the distal end of the outer tube 1 is a tapered closed end, and the cross-sectional area of ​​the tapered closed end decreases as it moves away from the proximal end of the outer tube 1.

[0061] Identification strips 105 are provided at both the proximal and distal ends of the first opening 101 to facilitate precise positioning and orientation. The identification strips 105 may have imaging capabilities, enabling the operator (doctor) to determine the location of the first opening 101 within the body. The identification strips 105 can be designed as semi-circular or multiple spaced dots, simply serving to identify the first opening 101. Because the identification strips 105 are located at the proximal and distal ends of the first opening 101, they enhance the imaging properties near the first opening 101, confirming whether the first opening 101 has been delivered to the appropriate location of the lesion to be cut, thereby improving work efficiency.

[0062] The location of the lesion to be removed can be a blood vessel, where the outer tube 1 can extend into the blood vessel and move along the inner wall of the vessel to the location of the lesion to be removed for resection. It can also be other locations, such as the intestines, etc., without specific limitations and all are within the scope of protection.

[0063] To facilitate assembly and improve the anti-backflow effect, one end of the first negative pressure pipe 3 extends into the outer pipe 1 through the first outlet; the anti-backflow component 301 is set at one end of the first negative pressure pipe 3.

[0064] Of course, the anti-backflow component 301 can also be installed inside the first negative pressure pipe 3.

[0065] like Figure 8 , Figure 9 and Figure 10 As shown, the anti-backflow component 301 is a baffle used to close the first negative pressure pipe 3. The baffle can open the first negative pressure pipe 3 when subjected to a force acting away from the distal end of the outer pipe 1, and can close the first negative pressure pipe 3 when subjected to a force acting towards the distal end of the outer pipe 1. That is, when the baffle, as the anti-backflow component 301, is subjected to a force acting towards the distal end of the outer pipe 1, it can close the end of the first negative pressure pipe 3, thereby preventing fluid from flowing from the distal end of the outer pipe 1 to the proximal end of the outer pipe 1 (in the same direction as the fluid in the first negative pressure pipe 3 flowing towards the outer pipe 1). When subjected to a force acting away from the distal end of the outer pipe 1, the baffle, as the anti-backflow component 301, opens the first negative pressure pipe 3 to achieve negative pressure operation, facilitating the discharge of the cut lesion tissue.

[0066] In some embodiments, such as Figure 8 and Figure 9 As shown, the anti-backflow assembly 301 has a baffle plate, which is rotatably connected to the first negative pressure pipe 3, and the baffle plate can close one end of the first negative pressure pipe 3;

[0067] In other embodiments, such as Figure 8 and Figure 10As shown, the anti-backflow component 301 has two baffles, which are rotatably connected to the first negative pressure pipe 3. The combined plate structure formed by the two baffles can close one end of the first negative pressure pipe 3.

[0068] Of course, multiple baffles can also be set, and all the baffles are rotatably connected to the first negative pressure pipe 3. The combined plate structure formed by the multiple baffles can seal one end of the first negative pressure pipe 3.

[0069] Alternatively, the anti-backflow component 301 can be configured as a telescopic plate, which extends or retracts perpendicular to the axial direction of the first negative pressure pipe 3 or at a certain acute angle to the axial direction of the first negative pressure pipe 3, so as to achieve the closure and opening of the first negative pressure pipe 3.

[0070] The lesion cutting device provided in this embodiment of the present invention also includes an elastic reset device, which can provide a baffle to close one end of the first negative pressure pipe 3.

[0071] Specifically, the elastic reset device can be a torsion spring, one end of which is fixed relative to the first negative pressure pipe 3, and the other end abuts against the baffle (anti-backflow component 301). Under the elastic restoring force (acting force) of the elastic reset device, the baffle closes one end of the first negative pressure pipe 3. When the negative pressure device generates negative pressure inside the first negative pressure pipe 3, the baffle overcomes the elastic restoring force (acting force) and rotates relative to the first negative pressure pipe 3, so that the baffle cannot close one end of the first negative pressure pipe 3, and the first negative pressure pipe 3 connects to the inside of the outer pipe 1.

[0072] The elastic reset device can also be a spring, tension spring or compression spring that connects the first negative pressure pipe 3 and the baffle, etc. There are no specific restrictions here and all are within the protection scope.

[0073] That is, an anti-backflow component 301 is provided at the distal end of the first negative pressure pipe 3. The anti-backflow component 301 can be in various forms such as single piece, double piece, and multiple pieces. One end of the anti-backflow component 301 is fixed to the first negative pressure pipe 3 by an elastic reset device such as a spring. When the first negative pressure device (negative pressure generating device) is turned on, the first negative pressure pipe 3 forms a negative pressure, causing the anti-backflow component 301 to open, forming a passage with the cutting piece 2 for cutting and collecting diseased tissue. When the first negative pressure device is turned off, the anti-backflow component 301 closes under the action of the elastic reset device, preventing diseased tissue from flowing back to the site of diseased tissue removal (such as inside a blood vessel).

[0074] In this embodiment, the cutting element 2 is a tubular structure, with its outer wall fitting into the inner wall of the outer tube 1. The cutting edge is located near the distal end of the cutting element 2, and the proximal end of the cutting element 2 is connected to the first negative pressure pipe 3. The relative movement of the outer wall of the cutting element 2 and the inner wall of the outer tube 1 allows the cutting edge to cut the diseased tissue. This relative movement can be either sliding along the axis of the outer tube 1 or rotating along the axis of the outer tube 1, etc., and will not be described in detail here, as these are all within the scope of protection.

[0075] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, the distal end of the cutting piece 2 passes through the handle part 4 and enters the first negative pressure chamber 102 of the outer tube 1. The outer diameter of the cutting piece 2 is adapted to the inner diameter of the first negative pressure chamber 102 of the outer tube 1, which facilitates the cutting piece 2 to move within the first negative pressure chamber 102 of the outer tube 1 to cut the diseased tissue.

[0076] like Figures 1-12 As shown, in the first embodiment, the proximal end of the cutting element 2 is connected to the push-pull handle 501, which facilitates the pushing or pulling action of the cutting element 2, thereby enabling the cutting edge to cut the lesion tissue to be cut.

[0077] Other structures, such as rod-shaped structures, can also be made for the cutting component 2. No specific limitations are made here, and all are within the scope of protection.

[0078] In this embodiment, one end of the first negative pressure pipe 3 extends into the cutting component 2 through the first outlet, and the outer wall of the first negative pressure pipe 3 mates with the inner wall of the cutting component 2. For example... Figure 8 As shown, the outer pipe 1 is fitted outside the cutting piece 2, the first negative pressure pipe 3 is fitted inside the cutting piece 2, and the anti-backflow component 301 is located in the area where the outer pipe 1, the cutting piece 2, and the first negative pressure pipe 3 are fitted. Figure 7 As shown, in the first embodiment, the cutting member 2 can be designed with openings at both ends, and the distal edge of the cutting member 2 is the cutting edge. The driving member drives the cutting member 2 to move inside the outer tube 1 so that the cutting edge can move along the first opening 101.

[0079] Specifically, the cutting element 2 has a hollow structure (the internal space of a tubular structure), and the cutting edge at the distal end of the cutting element 2 is beveled to facilitate the cutting of the diseased proliferative tissue. When the diseased tissue to be removed enters the first opening 101, the first opening 101 restricts the movement of the connection between the diseased tissue and the non-diseased tissue, thus fixing the diseased tissue to be removed. The cutting edge of the cutting element 2 passes through and leaves the first opening 101 (or moves repeatedly at the first opening 101), thereby removing the diseased tissue.

[0080] The cutting component 2 moves in the direction of the axis of the outer tube 1. For example... Figure 2 As shown, the cutting edge of the cutting piece 2 moves along the length of the first opening 101 in the axial direction of the outer tube 1 under the action of the push-pull handle 501, so that the cutting edge of the cutting piece 2 passes through and leaves the first opening 101, thereby removing the diseased tissue.

[0081] In order to ensure that the cutting edge of the cutting element 2 effectively removes the lesion tissue to be removed from the first opening 101, the cutting edge of the cutting element 2 needs to avoid moving the lesion tissue to be removed relative to the first opening 101 as it passes through the first opening 101.

[0082] Therefore, as Figures 3-6 As shown, to further improve the cutting effect, the outer tube 1 has a first negative pressure chamber 102 and a second negative pressure chamber 103 inside. The proximal end of the first negative pressure chamber 102 is the first outlet, and the proximal end of the second negative pressure chamber 103 is the second outlet. The first opening 101 is connected to the first negative pressure chamber 102, and the first negative pressure chamber 102 and the second negative pressure chamber 103 are connected through a through hole 104, which is correspondingly arranged with the first opening 101. The negative pressure device also includes a second negative pressure pipe 8, one end of which is connected to the second outlet, and the other end is used to connect to the air inlet of the negative pressure generating device. With the above arrangement, when the lesion to be removed enters the first negative pressure chamber 102, the second negative pressure chamber 103 can generate an attractive force on the lesion to be removed in the first negative pressure chamber 102 through the through hole 104, thereby ensuring the stability of the lesion to be removed during the cutting process, and thus improving the cutting accuracy and effect.

[0083] In this embodiment, the negative pressure generating device includes a first negative pressure device and a second negative pressure device. The first negative pressure device is connected to the first negative pressure pipeline 3, and the second negative pressure chamber 103 is connected to the second negative pressure device.

[0084] The outer tube 1 has a two-cavity structure. The first negative pressure cavity 102 and the second negative pressure cavity 103 form two channels. The proximal port of the first negative pressure cavity 102 is the first outlet, and the proximal port of the second negative pressure cavity 103 is the second outlet. The through hole 104 communicates with the first negative pressure cavity 102 and the first opening 101, so that the first negative pressure cavity 102 and the second negative pressure cavity 103 can be connected through the through hole 104, and the connection position corresponds to the first opening 101.

[0085] The number and arrangement of the through holes 104 are matched with the structure of the first opening 101, so that when the second negative pressure chamber 103 generates negative pressure, the lesion tissue to be removed can be sucked into the first opening 101.

[0086] Taking the cutting of lesions within a blood vessel as an example, during the lesion cutting process, the distal end of the outer tube 1 is inserted into the blood vessel. After locating the lesion, the second negative pressure device is activated to generate negative pressure in the second negative pressure chamber 103, drawing the lesion into the first opening 101. The cutting component 2 is then moved by the driving component until the lesion is cut off. Afterward, the first negative pressure device is activated. At this time, the lesion, due to the negative pressure of the first negative pressure device, enters the first negative pressure pipe 3 from the first negative pressure chamber 102 of the outer tube 1 and is discharged from the body. The above cutting operation can be repeated by changing the angle and position, thereby completing the cutting of multiple lesions.

[0087] In a specific embodiment of a lesion cutting device for cutting lesions within blood vessels, the first opening 101 can be disposed 10mm-20mm away from the distal shoulder of the outer tube 1, and the length of the first opening 101 is 10mm-150mm. Preferably, the first opening 101 is 30mm. Figure 3 , Figure 4 and Figure 5 As shown, the first opening 101 can be a square groove with semi-circular marking strips 105 at both ends for easy and precise positioning of the opening groove's location and orientation. Alternatively, the first opening 101 can also be a structure similar to an elliptical groove. Figure 14 and Figure 15 The first opening 101 shown has pointed structures at both ends, and a semi-circular marking strip 105 is provided at the end of the pointed structure to facilitate accurate positioning of the opening slot position and direction.

[0088] The distal end of the first negative pressure pipe 3 is located 10mm-20mm from the distal end of the handheld part 4.

[0089] In the first embodiment, the driving component can be a push-pull handle 501. One end of the push-pull handle 501 is an operating end for manual operation, and the other end of the push-pull handle 501 is connected to the proximal end of the cutting component 2. The handheld part 4 has a handle clearance groove for exposing the operating end. The handle clearance groove is provided on the handheld part 4 and communicates with the first mounting through groove for installing the first negative pressure pipe 3, so that the push-pull handle 501 can be exposed outside the handheld part 4. One end of the push-pull handle 501 is used for manual operation, and the other end is connected to the proximal end of the cutting component 2.

[0090] The specific operation process is as follows:

[0091] Taking the cutting of lesions within blood vessels as an example, preoperative angiography is used to assess the condition of the lesion in the vein, a lesion cutting device and vascular sheath of appropriate size are selected, the distal end of the vein is ligated, and the vein is punctured on the proximal side of the vein.

[0092] The tip of the lesion cutting device is inserted into the blood vessel along the vascular sheath. After locating the lesion site, the push-pull handle 501 is pulled backward (away from the distal end of the outer tube 1), causing the cutting piece 2 to move backward, thereby opening the first opening 101 and activating the second negative pressure device to generate negative pressure in the second negative pressure chamber 103. The negative pressure draws the lesion tissue vertically into the first opening 101 through the through hole 104. The push-pull handle 501 is pushed forward (towards the distal end of the outer tube 1) and the first negative pressure device is activated, generating negative pressure in the first negative pressure chamber 102 and the first negative pressure pipe 3. Then, the push-pull handle 501 is pushed forward, causing the cutting piece 2 to cut the lesion tissue forward. When the first opening 101 is closed by pushing forward, the first cut is completed. At this time, the lesion tissue enters the first negative pressure pipe 3 through the cutting piece 2 under the action of negative pressure, and finally enters the collection basket 601.

[0093] The above-mentioned operation steps can be repeated at different angles and positions to complete the cutting of the diseased tissue.

[0094] like Figures 13-21 As shown, in the second embodiment, the cutting member 2 has a second opening 201, the edge of which is a cutting edge. The driving member drives the cutting member 2 to rotate within the outer tube 1, so that the second opening 201 can be aligned with or offset from the first opening 101. During the cutting of the lesion tissue to be removed, the second opening 201 is aligned with the first opening 101. Through the operator's manipulation of the proximal end of the outer tube 1, the outer tube 1 and the biological structural wall move relative to each other to a predetermined position. The negative pressure generated by the negative pressure device allows the lesion tissue to be removed to enter the interior of the cutting member 2 through the first opening 101 and the second opening 201. The driving member drives the cutting member 2 to rotate within the outer tube 1, so that the second opening 201 is offset from the first opening 101. The first opening 101 restricts the movement of the connection between the lesion tissue to be removed and the non-lesion tissue, thereby fixing the lesion tissue to be removed. The edge of the second opening 201 (cutting edge) is used to cut the lesion tissue to be removed. The cut lesion tissue is located in the lumen of the cutting member 2 sleeved within the outer tube 1. In this embodiment, in a specific embodiment of a lesion cutting device for cutting lesion tissue within blood vessels, the distal end of the cutting member 2 is sealed and the proximal end is open. A second opening 201 is provided 10mm-20mm from the distal end. The major axis dimension of the second opening 201 is 10mm-150mm. During the rotation or movement of the cutting member 2 relative to the outer tube 1, the second opening 201 is misaligned or connected with the first opening 101 of the outer tube 1, so that the edge (cutting edge) of the second opening 201 cuts the lesion tissue.

[0095] In other embodiments, the driving component is a rotary handle 502, which is rotatably mounted on the handheld part. The rotary handle 502 is connected to the proximal end of the cutting component 2, and the movement of the cutting component 2 within the outer tube 1 is achieved by rotating the rotary handle 502. That is, the distal end of the cutting component 2 passes through the handheld part 4 and enters the outer tube 1, while the proximal end of the cutting component 2 is fixedly connected to the rotary handle 502.

[0096] Specifically, the rotating handle 502 is rotatably disposed near the proximal end of the handheld part 4, and the distal end of the rotating handle 502 is connected to the proximal end of the cutting component 2. The rotating handle 502 is sleeved on the outside of the first negative pressure pipe 3 and is rotatably engaged with the first negative pressure pipe 3. The first negative pressure pipe 3 has a hollow structure with openings at both ends, and the distal end of the first negative pressure pipe 3 passes through the rotating handle 502, the cutting component 2, and the handheld part 4 to connect with the first negative pressure device. Optionally, the distal end of the first negative pressure pipe 3 is located 10mm-20mm from the distal end of the handheld part 4.

[0097] To improve operational accuracy, a marking seat may be provided on the rotating handle 502 for marking the rotation angle of the second opening 201 relative to the first opening 101.

[0098] like Figure 20 As shown, a first marker seat 503 is provided on the rotating handle 502, and a second marker seat 401 and a third marker seat 402 are spaced apart on the circumference of the handheld part 4. When the rotating handle 502 is rotated to a first preset angle, that is, when the first marker seat 503 corresponds to (e.g., aligned) the third marker seat 402 of the handheld part 4, the second opening 201 of the cutting piece 2 corresponds to (e.g., aligned and connected) the first opening 101 of the outer tube 1. When the rotating handle 502 is rotated to a second preset angle, that is, when the first marker seat 503 corresponds to the second marker seat 401 of the handheld part 4, the second opening 201 of the cutting piece 2 is misaligned with the first opening 101 of the outer tube 1. The first preset angle and the second preset angle can be adaptively adjusted according to the size of each component.

[0099] The specific operation process is as follows:

[0100] Taking the cutting of lesions within blood vessels as an example, preoperative angiography is used to assess the condition of the lesion in the vein, a lesion cutting device and vascular sheath of appropriate size are selected, the distal end of the vein is ligated, and the vein is punctured on the proximal side of the vein.

[0101] The tip of the lesion cutting device is inserted into the blood vessel along the vascular sheath. After locating the lesion site, the handle 502 is rotated to drive the cutting element 2 to rotate. When the handle is rotated to the first preset angle (e.g., 180°), that is, when the first marker seat 503 corresponds to the third marker seat 402 of the handheld part 4, the second opening 201 is connected to the first opening 101. Then, the first negative pressure device is turned on to generate negative pressure in the second opening 201, which draws the lesion tissue into the first opening 101 and the second opening 201. Then, the handle 502 is rotated to drive the cutting element 2 to rotate and cut the lesion tissue. When the handle 502 is rotated to the second preset angle (e.g., 360°), that is, when the first marker seat 503 corresponds to the second marker seat 401 of the handheld part 4, the second opening 201 is misaligned with the first opening 101, completing the first cut. At this time, the lesion tissue enters the first negative pressure pipe 3 from the cutting element 2 due to the negative pressure, and finally enters the collection basket 601.

[0102] The above-mentioned operation steps can be repeated at different angles and positions to complete the cutting of the lesion tissue. The lesion cutting device provided by this utility model also includes a handheld part 4 for the operator to hold, and the handheld part 4 is connected to the outer tube 1; the handheld part 4 has a first mounting groove, and the first negative pressure pipe 3 is at least partially located in the first mounting groove.

[0103] In the first embodiment, such as Figure 1 , Figure 2 and Figure 11 As shown, the proximal end of the outer tube 1 is connected and fixed to the distal end of the handheld part 4. The second negative pressure chamber 103 at the proximal end of the outer tube 1 protrudes from the first negative pressure chamber 102. The protruding part of the second negative pressure chamber 103 is connected to the second negative pressure pipe 8. The second negative pressure pipe 8 is fixed inside the handheld part 4 and extends out of the handheld part 4, and is connected to the external second negative pressure device.

[0104] Understandably, the handheld part 4 is used by medical personnel to grip and operate, providing effective support and stability for the operation. The distal end of the handheld part 4 is fixedly connected to the proximal end of the outer tube 1. To improve structural compactness, the handheld part 4 is provided with a first mounting slot for installing the first negative pressure pipe 3 and a second mounting slot for installing the second negative pressure pipe 8.

[0105] The first negative pressure pipe 3 is disposed within the first mounting groove and has a hollow structure. The outer diameter of the first negative pressure pipe 3 is adapted to the inner diameter of the cutting component 2, allowing the distal end of the first negative pressure pipe 3 to extend into the cutting component 2. This allows the distal end of the first negative pressure pipe 3 to communicate with the cutting component 2 and the first negative pressure chamber 102 of the outer tube 1. The proximal end of the first negative pressure pipe 3 passes through the handle 4 and the first conduit 7, and is sequentially connected to the first negative pressure device (negative pressure generating device). When the cutting component 2 needs to remove diseased tissue, the first negative pressure device activates negative pressure, allowing the removed diseased tissue to be discharged from the body through the first negative pressure chamber 102 of the outer tube 1 and the first negative pressure pipe 3.

[0106] Furthermore, the lesion cutting device also includes a collection device 6 for collecting the cut lesion tissue. For example, Figure 12 and Figure 21 As shown, the lesion cutting device provided in the first embodiment and the second embodiment can both include a collecting device 6. The structure of the collecting device 6 can be the same or similar, or of course, different.

[0107] Taking the collection device 6 in the first embodiment as an example, such as Figure 12 As shown, the collecting device 6 includes a collecting basket 601, which is a mesh basket structure to facilitate the collection of cut lesion tissue. The collecting basket 601 is located between the first negative pressure pipe 3 and the first conduit 7. The first conduit 7 is used to connect to the first negative pressure device (negative pressure generating device). The inlet of the collecting basket 601 is connected to the distal end of the first negative pressure pipe 3. The outer shell of the collecting device 6 has an outlet 602, and the collecting basket 601 is located inside the outer shell. The outlet 602 is connected to the first conduit 7. Specifically, the proximal end of the first negative pressure pipe 3 passes through the collecting device 6 and communicates with the collecting basket 601 inside it.

[0108] The handheld part 4 and the collecting device 6 are equipped with a fixing frame 9 to fix the first negative pressure pipe 3 and prevent the first negative pressure pipe 3 from moving.

[0109] The driving component is used to drive the cutting component 2 to move within the inner cavity of the outer tube 1, so that the cutting edge of the cutting component 2 passes through the first opening 101 until the diseased tissue is removed.

[0110] In this embodiment, the first conduit 7 and the second negative pressure pipe 8 can be flexible pipes. Specifically, the materials of the first conduit 7 and the second negative pressure pipe 8 are both made of polymer materials, which may include thermoplastic polymers, synthetic rubber, silicone rubber, or other materials to improve the sealing effect.

[0111] The outer tube 1 can have a two-layer structure. The inner layer of the outer tube 1 is a metal or a high-hardness polymer. The polymer can include thermoplastic polymers or thermosetting polymers and other materials. The metal can be a nickel-titanium alloy, a cobalt-chromium alloy or stainless steel. The outer layer of the outer tube 1 is a PTFE or other polymer coating, which reduces the friction coefficient of the outer tube 1 and provides a lubricating effect.

[0112] The size of the outer tube 1 is adjusted according to the actual surgical needs. For example, in a lesion cutting device used to remove lesions within blood vessels, the outer diameter of the outer tube 1 does not exceed 8mm, and its size is adapted to the corresponding vascular sheath, allowing passage through vascular sheaths of 4Fr-24Fr. To facilitate entry into the vascular sheath, the distal end of the outer tube 1 can be designed as a cone and sealed.

[0113] The material of the cutting part 2 can be hard, wear-resistant, such as steel, tungsten carbide, tungsten carbide with 5% to 20% nickel, silicon carbide, titanium nitride or other materials, and can be manufactured by processes including heat treatment, ion implantation, grinding and other processes.

[0114] The first negative pressure pipe 3 can be a rigid pipe, which can be made of metals such as stainless steel, cobalt-chromium alloy, nickel-titanium alloy, nickel-molybdenum-iron alloy, or rigid polymers such as polyetheretherketone, liquid crystal polymer, etc.

[0115] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0116] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lesion cutting device, characterized in that, include: The outer tube (1) has a closed end at its distal end and a first opening (101) for receiving the lesion tissue to be removed on the side wall near the distal end of the outer tube (1). The proximal end of the outer tube (1) has a first outlet, and the first opening (101) is connected to the first outlet. The cutting assembly includes a cutting element (2) and a driving element. The cutting element (2) is located inside the outer tube (1). The driving element is used to drive the cutting element (2) to move inside the outer tube (1) so that the cutting edge of the cutting element (2) cuts the lesion tissue to be removed that enters the outer tube (1) from the first opening (101). The negative pressure device includes a first negative pressure pipe (3), one end of which is connected to the first outlet, and the other end is connected to the air inlet of the negative pressure generating device. Anti-backflow component (301) is used to open and close the first negative pressure pipe (3) to prevent fluid in the first negative pressure pipe (3) from flowing to the outer pipe (1).

2. The lesion cutting device as described in claim 1, characterized in that, One end of the first negative pressure pipe (3) extends into the outer pipe (1) through the first outlet; The anti-backflow component (301) is located at one end of the first negative pressure pipe (3).

3. The lesion cutting device as described in claim 2, characterized in that, The anti-backflow component (301) is a baffle for closing the first negative pressure pipe (3). The baffle can open the first negative pressure pipe (3) when subjected to a force opposite to the distal end of the outer pipe (1), and can close the first negative pressure pipe (3) when subjected to a force toward the distal end of the outer pipe (1).

4. The lesion cutting device as described in claim 3, characterized in that, The anti-backflow assembly (301) has a baffle plate, which is rotatably connected to the first negative pressure pipe (3), and the baffle plate can close one end of the first negative pressure pipe (3); Alternatively, the anti-backflow assembly (301) has at least two baffles that are rotatably connected to the first negative pressure pipe (3), and the combined plate structure formed by the at least two baffles can close one end of the first negative pressure pipe (3).

5. The lesion cutting device as described in claim 4, characterized in that, It also includes an elastic reset device, which can provide the force that the baffle closes one end of the first negative pressure pipe (3).

6. The lesion cutting device as described in claim 1, characterized in that, The cutting component (2) is a tubular structure, and the outer wall of the cutting component (2) is matched with the inner wall of the outer tube (1); The cutting edge is located near the distal end of the cutting element (2), and the proximal end of the cutting element (2) is connected to the first negative pressure pipe (3).

7. The lesion cutting device as described in claim 6, characterized in that, One end of the first negative pressure pipe (3) extends into the cutting piece (2) through the first outlet, and the outer wall of the first negative pressure pipe (3) matches the inner wall of the cutting piece (2); The cutting element (2) has a second opening (201), the edge of which is the cutting edge; The driving member drives the cutting member (2) to rotate inside the outer tube (1) so that the second opening (201) can be aligned with and offset from the first opening (101).

8. The lesion cutting device as described in claim 6, characterized in that, One end of the first negative pressure pipe (3) extends into the cutting piece (2) through the first outlet, and the outer wall of the first negative pressure pipe (3) matches the inner wall of the cutting piece (2); The distal edge of the cutting element (2) is the cutting edge; the driving element drives the cutting element (2) to move inside the outer tube (1) so that the cutting edge can move along the first opening (101).

9. The lesion cutting device as described in claim 8, characterized in that, The outer tube (1) has a first negative pressure chamber (102) and a second negative pressure chamber (103) inside. The proximal end of the first negative pressure chamber (102) is the first outlet, and the proximal end of the second negative pressure chamber (103) is the second outlet. The first opening (101) is connected to the first negative pressure chamber (102), and the first negative pressure chamber (102) and the second negative pressure chamber (103) are connected by a through hole, which is provided corresponding to the first opening (101); The negative pressure device also includes a second negative pressure pipe (8), one end of which is connected to the second outlet, and the other end is used to connect to the air inlet of the negative pressure generating device.

10. The lesion cutting device according to any one of claims 1-9, characterized in that, It also includes a handheld part (4) for being held by an operator, the handheld part (4) being connected to the outer tube (1); The handheld part (4) has a first mounting groove, and the first negative pressure pipe (3) is at least partially located in the first mounting groove.

Images