A disposable cryoablation catheter

Abstract

The application provides a disposable cryoablation catheter, which comprises an internal hollow tube body, a freezing system and a freezing unit, the freezing unit comprises a plurality of split freezing groups which are independently connected with the freezing system, and each split freezing group comprises a split fiber tube, the split fiber tube comprises a treatment section, a connecting section and a straight tube section which are sequentially arranged from a distal end to a proximal end, and the connecting section is a bendable section; an end of the tube body close to the freezing system is externally provided with a handle, and a driving distal end of the handle is connected with the connecting section, the device drives the distal treatment section to be distributed in an outward expansion mode and freely adjusted through axial and circumferential driving of the handle, the bending movement of the distal treatment section is realized in a manually controllable state, the adaptability of the cryoablation catheter to a tumor surface is improved, meanwhile, overflow of the cold source to the parts which do not need to be treated in the action range can be avoided, and the device has better safety protection significance.

Description

Technical Field

[0001] This invention relates to the field of disposable cryotherapy equipment technology, specifically a disposable cryoablation catheter. Background Technology

[0002] This cryoablation catheter is primarily used to treat solid tumors in body cavities (such as the esophagus and bronchi) via cryoablation surgery. In applications to natural body cavities, most existing cryoablation devices perform cryoablation of the entire circumference (spherical area). However, in reality, tumors in these cavities may only exist in a portion of the cavity, not covering the entire circumference. Therefore, ablation of the entire cavity circumference can damage the normal physiological function of the cavity. Furthermore, currently available cryoablation devices often use low-temperature probes for subcutaneous puncture, resulting in relatively rigid cryomaterials and small freezing areas. For larger tumors, multiple cryoprobes are required. Additionally, the cryoablation tip cannot be precisely tailored to the visualized shape and size of the tumor, lacking the ability for accurate treatment, leading to incomplete or unsatisfactory cryoablation results.

[0003] To achieve the above objectives, the present invention provides a disposable cryoablation catheter, which can solve the problems mentioned in the background art. Summary of the Invention

[0004] The present invention adopts the following technical solution:

[0005] A disposable cryoablation catheter includes a hollow tube body, a cryosystem, and a cryounit. The cryounit includes multiple separate cryoassemblies independently connected to the cryosystem. Each separate cryoassembly includes a separate fiber tube, which includes a treatment segment, a connecting segment, and a straight segment distributed sequentially from distal to proximal. The connecting segment is a bendable segment.

[0006] A handle is provided on the outside of one end of the tube near the refrigeration system, and the driving end of the handle is connected to the connecting section.

[0007] Preferably, a sheath is fitted around the outer end of the tube body away from the refrigeration system. When the handle is pushed toward the sheath, the split refrigeration units at the far end of the tube body are released from inside the sheath. When the multiple split fiber tubes are in the released state, the release ends diffuse from outside the axis of the split fiber tubes.

[0008] Preferably, one end of the straight tube segment is connected to the connecting segment, and the end of the connecting segment connected to the straight tube segment diffuses outward from the axis of the straight tube segment when it is released outside the tube body, and the treatment segment is a free end; the connecting segment is constricted inside the tube body when it is not released from inside the tube body.

[0009] Preferably, one end of the straight pipe section is connected to the refrigeration system, and the inlet and outlet cold air ends of the refrigeration equipment of the refrigeration system are connected to the straight pipe section and exchange cold source gas through the straight pipe section.

[0010] Preferably, the split fiber tube includes an inlet pipe and a return pipe with the same central axis but different inner diameters, and the inlet pipe and the return pipe are distributed in the treatment section, the connecting section and the straight pipe section;

[0011] Multiple hollowed-out adjustment rings are fitted and fixed between the outer wall of the intake pipe and the inner wall of the return pipe, and the driving end of the adjustment ring group is connected to the handle.

[0012] Preferably, the connecting section is provided with multiple adjustment ring groups at intervals. Each adjustment ring group includes a fixed inner ring fixed to the outside of the air inlet pipe and a fixed outer ring fixed to the inner wall of the air return pipe. Two adjustment plates are provided between the fixed inner ring and the fixed outer ring, which are symmetrically distributed about the pipe axis. Multiple adjustment holes are provided inside the adjustment plates. At least one buckle plate is fixed on a split fiber tube at the end of the connecting section closest to the treated section. The other end of the buckle plate is provided with a guide line. The other end of the guide line passes through the corresponding adjustment holes on the multiple evenly distributed adjustment ring groups and is connected to the drive end of the handle.

[0013] The guide wire is a tough, rigid wire that can be subjected to force.

[0014] Preferably, the handle includes an inner end handle fixed to the outside of the tube body, the middle section of the inner end handle is provided with an inner tube, and the outside of the inner tube is provided with an outer end handle;

[0015] The inner tube is provided with multiple movable guide grooves. Each movable guide groove includes a horizontal groove that surrounds the outside of the inner tube and is at the same axial position as the outside of the inner tube, and a vertical groove that connects to both ends of the horizontal groove. The end of the vertical groove is connected to the inner wall of the handle and the tube body. An intermediate position adjustment plate is provided inside the horizontal groove.

[0016] The end of the guide wire connected to a single adjustment ring assembly that is away from the adjustment ring assembly is fixed to both ends of the intermediate position adjustment plate. The top of the intermediate position adjustment plate is provided with a connecting block that is fixed to the inner wall of the outer sleeve handle.

[0017] Preferably, the plurality of the movable guide grooves are distributed at intervals on the inner tube;

[0018] The guide lines inside the adjustment holes at different corresponding positions on two adjacent adjustment ring groups are distributed inside different movable guide grooves. The number of the two ends of the intermediate adjustment plate connected inside the multiple movable guide grooves corresponds one-to-one with the guide lines connected on the multiple adjustment ring groups. The part of the guide line that passes through the tube body is located inside the movable guide groove.

[0019] Preferably, the refrigeration system includes an ultra-low temperature device, and one end of each of the individual split fiber tubes connected to the refrigeration system is separately connected to a solenoid valve, which is connected to the gas outlet control terminal of the ultra-low temperature device;

[0020] A sealed joint connects each of the individual split fiber tubes to the cryogenic device.

[0021] Preferably, a transmission pipeline is fixedly provided at one end of the handle near the refrigeration system, and the transmission pipeline is wrapped around the outside of the multiple split fiber tubes; a vacuum layer exists between the inside of the tube and the split refrigeration unit, one end of the vacuum layer is connected to a vacuum pipeline, the vacuum pipeline is located inside the transmission pipeline and one end of the vacuum pipeline is connected to a vacuum pump.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] This invention uses an axial drive handle to disperse the treatment segment at the distal end of the tube, which acts within the diffuser tube diameter. Each dispersed individual fiber tube is individually connected to the cryogenic cooling source, allowing the cooling device to act on a single point or a single area on the tumor. This enables the input and output of cold air to be individually controlled by a visualization device, reducing the impact of low temperature on other cavities or organs around the tumor and thus preventing damage.

[0024] Building upon this foundation, the device can also adaptively bend the distal split fiber tube via the outer sleeve of the circumferential drive handle. This allows for more complete coverage of the tumor's exterior when dealing with larger tumors, tumors covering a wider area, or tumors with overly rugged outer surfaces. By individually controlling the bending effect of the connecting segment of the split fiber tube through traction, the device can control the position of the treatment segment against different tumor surfaces, thereby improving the concentration of the distal treatment range and the concentration of cold source conduction in cryotherapy. At the same time, the highly flexible treatment segment enhances the device's adaptability to tumors different from those treated in cryosurgery, solving the problem of incomplete freezing.

[0025] When dealing with certain natural cavities such as the trachea / bronchus and intestines (the trachea / bronchus and intestines are natural channels with ciliary movement and peristalsis), the position of the treatment segment at the free end can be adjusted to avoid cilia in areas where cryotherapy is not required, thus minimizing the impact on the physiological function of cilia and peristalsis after the procedure. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the external structure (contracted state) of the present invention;

[0027] Figure 2 This is a schematic diagram of the structural connection section of the present invention;

[0028] Figure 3 This is a schematic diagram of the side structure of the present invention;

[0029] Figure 4 For the present invention Figure 3 Structural cross-sectional view;

[0030] Figure 5 For the present invention Figure 4 Enlarged view of the structure at point A in the image;

[0031] Figure 6 This is a schematic diagram of the cross-section of the split fiber tube structure and the position of the adjustment ring assembly of the present invention;

[0032] Figure 7 This is a schematic diagram of the guide line connection between two adjacent adjusting ring groups according to the present invention;

[0033] Figure 8 This is a schematic diagram of the inner end handle structure of the present invention;

[0034] Figure 9 This is a diagram of the external structure of the handle of the present invention.

[0035] In the diagram: 1. Refrigeration unit; 2. Sheath; 3. Tube body; 4. Handle; 5. Transfer pipeline; 6. Refrigeration system;

[0036] 101. Split-type cryotherapy unit; 102. Split-type fiber tube; 103. Treatment section; 105. Adjustment ring group; 106. Air inlet tube; 107. Air return tube; 108. Vacuum layer;

[0037] 109. Fixed inner ring; 110. Fixed outer ring; 111. Adjusting plate; 112. Adjusting perforation; 113. Guide line; 114. Buckle plate;

[0038] 401. Inner end handle; 402. Outer outer handle; 403. Inner tube; 404. Movable guide groove; 405. Intermediate position adjustment plate;

[0039] 601. Vacuum pump; 602. Solenoid valve; 603. Vacuum pipeline; 604. Sealing joint. Detailed Implementation

[0040] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0041] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] The present invention will be further described in detail below with reference to the accompanying drawings.

[0044] In one embodiment of the present invention: please refer to the appendix for details. Figure 1-5 It includes a hollow tube body 3, a freezing system 6 and a freezing unit 1. The freezing unit 1 includes multiple separate freezing groups 101 that are independently connected to the freezing system 6. Each separate freezing group 101 includes a separate fiber tube 102. The separate fiber tube 102 includes a treatment section 103, a connecting section and a straight tube section distributed from the distal end to the proximal end. The connecting section is a bendable section.

[0045] A handle 4 is provided on the outside of the tube body 3 near the refrigeration system 6, and the driving end of the handle 4 is connected to the connecting section.

[0046] A sheath tube 2 is fitted onto the outer end of the tube body 3 away from the freezing system 6. When the handle 4 is pushed toward the sheath tube 2, the split freezing group 101 at the far end of the tube body 3 is released from the inside of the sheath tube 2. When the multiple split fiber tubes 102 are in the released state, the release ends diffuse from the outside of the axis of the split fiber tube 102.

[0047] One end of the straight tube segment is connected to the connecting segment. When the end of the connecting segment connected to the straight tube segment is released outside the tube body 3, it diffuses outward from the axis of the straight tube segment. The treatment segment 103 is a free end. When the connecting segment is not released from the inside of the tube body 3, it is constricted inside the tube body 3.

[0048] One end of the straight pipe section is connected to the refrigeration system 6. The inlet and outlet ends of the refrigeration equipment in the refrigeration system 6 are connected to the straight pipe section, and cold source gas exchange occurs through the straight pipe section. The refrigeration structure of this device consists of a refrigeration unit 1, a sheath 2, a tube body 3, a handle 4, and a transmission pipeline 5. The refrigeration unit 1 is located and connected to the distal end of the tube body 3, and both ends of the tube body 3 are closed. Specifically, the refrigeration unit 1 is composed of several separate refrigeration units 101. The tube body 3 is movably disposed within the cavity of the sheath 2. The distal end of the tube body 3 is connected and sealed to the proximal end of each separate refrigeration unit 101. The proximal end of the tube body 3 is connected to the distal end of the handle 4, and the proximal end of the handle 4 is connected to the distal end of the transmission pipeline 5. When the user operates the handle 4 to move the tube body 3 and the sheath 2 relative to each other, the refrigeration unit 1 and the tube body 3 move synchronously, realizing the expansion and contraction of the refrigeration unit. When the cryo-unit 1 is in its expanded state, it is located outside the sheath 2 and comes into contact with the tissues inside the body cavity for cryoablation, such as... Figure 1 As shown; when the refrigeration unit 1 is in the contracted state, it is located inside the sheath 2, as shown. Figure 2 As shown, each individual cryoablation unit 101 independently includes an inlet pipe 106 and a return pipe 107. The inlet pipe 106 has an inlet channel, and the gap between the return pipe 107 and the inlet pipe 106 is a return channel. The refrigerant reaches the treatment section 103 through the inlet channel and returns through the return channel, achieving cryoablation. The distal end of the tube body 3 is sealed to each individual cryoablation unit 101. A vacuum layer 108 is located between the tube body 3 and the return pipe 107 of each individual cryoablation unit 101. The vacuum layer 108 is connected to a vacuum pump through a vacuum pipeline 603. The transmission line 5 encloses the inlet pipe 106 and return pipe 107 of each individual freezing unit 101 together. The distal end of the transmission line 5 is connected to the handle 4. The inlet pipe 106 and return pipe 107 of each individual freezing unit 101 are connected to the piping in the freezing system through sealing joints 604. Each piping is controlled by a solenoid valve 602, so each sub-freezing unit can be controlled independently to achieve precise freezing. The vacuum line 603 is also connected to the vacuum pump in the freezing system through a joint.

[0049] In yet another embodiment of the invention: please refer to the following: Figure 3-9The split fiber tube 102 includes an air inlet tube 106 and an air return tube 107 with the same central axis but different inner diameters. The air inlet tube 106 and the air return tube 107 are distributed in the treatment section 103, the connecting section and the straight tube section. A plurality of hollow adjustment ring groups 105 are sleeved and fixed between the outer wall of the air inlet tube 106 and the inner wall of the air return tube 107. The driving end of the adjustment ring group 105 is connected to the handle 4.

[0050] Please refer to this carefully. Figure 2 , Figure 3 The connecting section is provided with multiple adjustment ring groups 105 at intervals. Each adjustment ring group 105 includes a fixed inner ring 109 fixed to the outside of the air inlet pipe 106 and a fixed outer ring 110 fixed to the inner wall of the air return pipe 107. Two adjustment plates 111 are provided between the fixed inner ring 109 and the fixed outer ring 110, which are symmetrically distributed about the pipe axis. Multiple adjustment holes 112 are provided inside the adjustment plates 111. At least one buckle plate 114 is fixed on a split fiber tube 102 of the connecting section closest to the treated section 103. The other end of the buckle plate 114 is provided with a guide line 113. The other end of the guide line 113 passes through the corresponding adjustment holes 112 on the multiple evenly distributed adjustment ring groups 105 and is connected to the drive end of the handle 4.

[0051] The guide line 113 is a tough, rigid line that can be subjected to force;

[0052] The handle 4 includes an inner end handle 401 fixed to the outside of the tube body 3. The middle section of the inner end handle 401 is provided with an inner tube 403, and the outer end handle 402 is sleeved on the outside of the inner tube 403.

[0053] The inner tube 403 is provided with a plurality of movable guide grooves 404. Each movable guide groove 404 includes a horizontal groove that surrounds the outside of the inner tube 403 and is at the same axial position as the outside of the inner tube 403 and a vertical groove that connects to both ends of the horizontal groove. The end of the vertical groove is connected to the inner wall of the handle 4 and the tube body 3. An intermediate position adjustment plate 405 is provided inside the horizontal groove.

[0054] The end of the guide line 113 connected to a single adjustment ring group 105 away from the adjustment ring group 105 is fixed to both ends of the intermediate position adjustment plate 405 respectively. The top of the intermediate position adjustment plate 405 is provided with a connecting block that is fixed to the inner wall of the outer sleeve handle 402.

[0055] Multiple movable guide grooves 404 are spaced apart on the inner tube 403;

[0056] The guide lines 113 inside the adjustment holes 112 at different corresponding positions on two adjacent adjustment ring groups 105 are distributed inside different movable guide grooves 404. The number of the two ends of the intermediate adjustment plate 405 connected inside the multiple movable guide grooves 404 corresponds one-to-one with the guide lines 113 connected on the multiple adjustment ring groups 105. The part of the guide line 113 that passes through the tube 3 is located inside the movable guide groove 404.

[0057] The distal treatment segment 103 of this device is bent in the following manner, as follows: Figure 3-5 It can be seen that pushing the handle 4 causes the tube 3 to advance into the sheath 2, and when the distal treatment segment 103 disengages from the sheath 2 region, it naturally expands outward to achieve a fixed, preset initial position, such as... Figure 1 and Figure 3 The diffusion state shown can be applied to the relatively wide tube in the conventional state for cryotherapy; when it is convenient to adapt to the position of narrow lumen, the axial drive handle 4 has two effective modes of action, one is to avoid the cryotherapy section of the villous fiber tube by bending, and the other is to bend in multiple directions to wrap the outer surface of large or large-area tumors.

[0058] The driving method of handle 4 is as follows: before adjusting handle 4, the location of the tumor and its external structures are located using a visualization device, and then multiple pre-set guide lines 113 are used to observe... Figure 5 and the Figure 5 As shown, the two adjacent adjustment ring groups 105 are not connected by the same set of guide lines 113, but rather by different movable guide grooves 404 inside the handle 4. For example, in a specific implementation... Figure 5The front end of the split fiber tube 102 shown is the treatment section 103, and the middle bent end is the connecting section. The tubing of the connecting section is determined according to the above-mentioned visualization scan results, which determines how many bends and guide lines 113 are used. Thus, the connecting section is divided into several parts by the adjustment ring group 105, which are sequentially numbered from one end of the treatment section 103 to the other end, for example (AN) adjustment ring group 105. A guide line 113 (straight state) is connected inside the upper and lower adjustment plates 111 of adjustment ring group A 105. The other end of the guide line 113 is connected to the inside of the movable guide groove 404. Multiple movable guide grooves 404 are also numbered (AN) by the distal and proximal ends. The two guide lines 113 on adjustment ring group A 105 are synchronously connected to both sides of the middle adjustment plate 405 inside movable guide groove A 404. When the handle 4 drives the intermediate adjustment plate 405 inside the A movable guide groove 404, it drives the connecting section from the A adjustment ring group 105 to the B adjustment ring group 105 to rotate outward or inward toward the axis of the handle 4. The force source acting on the guide line 113 is that the two adjustment plates 111 respectively obtain a certain pushing force and pulling force to form the turning bend of the connecting section. In addition, the arrangement of the adjustment holes 112 is sequential. The positions of the adjustment holes 112 corresponding to the connection of the B guide line 113 and the A guide line 113 on the B adjustment ring group 105 are not repeated or the same. When multiple sections need to be bent, the corresponding handle 4 position is turned to drive the intermediate adjustment plate 405 at the corresponding position to rotate circumferentially, so as to realize the bending and fitting change of the connecting section AN, which is convenient to adapt to the position of the tumor surface.

[0059] Please refer to this carefully. Figure 2 The refrigeration system 6 includes an ultra-low temperature device. One end of each of the split fiber tubes 102 is connected to the refrigeration system 6 and is separately connected to a solenoid valve 602. The solenoid valve 602 is connected to the gas outlet control end of the ultra-low temperature device.

[0060] A sealing joint 604 connects each of the individual split fiber tubes 102 to the cryogenic device.

[0061] Please refer to this carefully. Figure 1-4 The handle 4 is fixedly provided with a transmission pipe 5 near the end of the freezing system 6. The transmission pipe 5 is wrapped around the outside of the multiple split fiber tubes 102. There is a vacuum layer 108 between the inside of the tube body 3 and the split freezing group 101. One end of the vacuum layer 108 is connected to a vacuum pipe 603. The vacuum pipe 603 is located inside the transmission pipe 5 and one end of the vacuum pipe 603 is connected to a vacuum pump 601.

[0062] The split fiber tubes 102 inside the split cryotherapy unit 101 are set up separately, and each split fiber tube 102 is connected to a set of cooling sources in turn. This enables cryotherapy of small tumors (which can be completed by freezing only one or a few split fiber tubes 102) in the basic mode, preventing the split fiber tubes 102 from damaging parts that do not need treatment after they are dispersed, thus expanding the applicability of this device.

[0063] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0064] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A disposable cryoablation catheter, characterized in that: It includes a hollow tube (3), a freezing system (6) and a freezing unit (1). The freezing unit (1) includes multiple separate freezing groups (101) that are independently connected to the freezing system (6). Each separate freezing group (101) includes a separate fiber tube (102). The separate fiber tube (102) includes a treatment section (103), a connecting section and a straight tube section that are distributed sequentially from the distal end to the proximal end. The connecting section is a bendable section. A handle (4) is provided on the outside of one end of the tube (3) near the refrigeration system (6), and the driving end of the handle (4) is connected to the connecting section; The split fiber tube (102) includes an air inlet tube (106) and an air return tube (107) with the same central axis but different inner diameters. The air inlet tube (106) and the air return tube (107) are distributed in the treatment section (103), the connecting section and the straight tube section. Multiple hollowed-out adjustment ring groups (105) are sleeved and fixed between the outer wall of the air intake pipe (106) and the inner wall of the air return pipe (107), and the driving end of the adjustment ring group (105) is connected to the handle (4). The connecting section is provided with multiple adjustment ring groups (105) at intervals. Each adjustment ring group (105) includes a fixed inner ring (109) fixed to the outside of the air inlet pipe (106) and a fixed outer ring (110) fixed to the inner wall of the air return pipe (107). Two adjustment plates (111) are provided between the fixed inner ring (109) and the fixed outer ring (110) symmetrically distributed about the pipe axis. Multiple adjustment holes (112) are provided inside the adjustment plates (111). At least one buckle plate (114) is fixed on a split fiber tube (102) of the connecting section closest to the treated section (103). The other end of the buckle plate (114) is provided with a guide line (113). The other end of the guide line (113) passes through the corresponding adjustment holes (112) on the multiple evenly distributed adjustment ring groups (105) and is connected to the drive end of the handle (4). The guide line (113) is a tough, hard line that can be subjected to force.

2. The disposable cryoablation catheter according to claim 1, characterized in that: A sheath (2) is fitted on the end of the tube (3) away from the freezing system (6). When the handle (4) is pushed toward the sheath (2), the split freezing unit (101) at the far end of the tube (3) is released from inside the sheath (2). When the multiple split fiber tubes (102) are in the released state, the release ends diffuse from outside the axis of the split fiber tube (102).

3. The disposable cryoablation catheter according to claim 2, characterized in that: One end of the straight tube segment is connected to the connecting segment. When the end of the connecting segment connected to the straight tube segment is released outside the tube body (3), it diffuses outward from the axis of the straight tube segment. The treatment segment (103) is a free end. When the connecting segment is not released from the inside of the tube body (3), it is constricted inside the tube body (3).

4. The disposable cryoablation catheter according to claim 2, characterized in that: One end of the straight pipe section is connected to the refrigeration system (6). The inlet and outlet cold air ends of the refrigeration equipment of the refrigeration system (6) are connected to the straight pipe section and exchange cold source gas through the straight pipe section.

5. The disposable cryoablation catheter according to claim 1, characterized in that: The handle (4) includes an inner end handle (401) fixed to the outside of the tube body (3), the middle section of the inner end handle (401) is provided with an inner tube (403), and the outer end handle (402) is sleeved on the outside of the inner tube (403). The inner tube (403) is provided with a plurality of movable guide grooves (404). Each movable guide groove (404) includes a horizontal groove that surrounds the outside of the inner tube (403) and has the same axial position as the outside of the inner tube (403) and a vertical groove that connects to both ends of the horizontal groove. The end of the vertical groove is connected to the inner wall of the handle (4) and the tube body (3). The horizontal groove is provided with an intermediate position adjustment plate (405). The end of the guide line (113) connected to a single adjustment ring group (105) away from the adjustment ring group (105) is fixed to both ends of the intermediate position adjustment plate (405). The top of the intermediate position adjustment plate (405) is provided with a connecting block that is fixed to the inner wall of the outer sleeve handle (402).

6. The disposable cryoablation catheter according to claim 5, characterized in that: Multiple movable guide grooves (404) are spaced apart on the inner tube (403); The guide lines (113) inside the adjustment holes (112) at different corresponding positions on two adjacent adjustment ring groups (105) are distributed inside different movable guide grooves (404). The number of the two ends of the intermediate adjustment plate (405) connected inside the multiple movable guide grooves (404) corresponds one-to-one with the guide lines (113) connected on the multiple adjustment ring groups (105). The part of the guide line (113) that passes through the tube body (3) is located inside the movable guide groove (404).

7. The disposable cryoablation catheter according to claim 1, characterized in that: The refrigeration system (6) includes an ultra-low temperature device. One end of each of the individual split fiber tubes (102) is connected to the refrigeration system (6) and is separately connected to a solenoid valve (602). The solenoid valve (602) is connected to the gas outlet control end of the ultra-low temperature device. A sealing joint (604) connects each of the individual split fiber tubes (102) to the cryogenic device.

8. The disposable cryoablation catheter according to claim 1, characterized in that: The handle (4) is fixedly provided with a transmission pipe (5) at one end near the freezing system (6). The transmission pipe (5) is wrapped around the outside of the multiple split fiber tubes (102). There is a vacuum layer (108) between the inside of the tube body (3) and the split freezing group (101). One end of the vacuum layer (108) is connected to a vacuum pipe (603). The vacuum pipe (603) is located inside the transmission pipe (5) and one end of the vacuum pipe (603) is connected to a vacuum pump (601).

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