Cold and hot ablation needle

Abstract

The utility model relates to a cold and hot ablation needle, and relates to the technical field of ablation. When the cold and hot ablation needle is used, the sealing air suction device is punctured through the puncturing mechanism, the sealing air suction device can suck air, a certain vacuum degree can be achieved in the vacuum layer heat insulation sleeve and the flexible pipe, the vacuum performance can be maintained for enough time, and therefore compared with dynamic vacuum operation, the cold and hot ablation needle has the advantages of being simple in structure and convenient to use. The cold and hot ablation needle is simpler in air exhaust process and more convenient to operate; and the vacuumizing operation is not needed before use, so that no vacuumizing noise is generated. Besides, compared with static vacuum operation, the cold and hot ablation needle does not need to form a vacuum environment before being used, and therefore the problem that the vacuum degree cannot be kept for a long time in the prior art can be solved.

Description

Technical Field

[0001] This utility model relates to the field of ablation technology, and in particular to a hot and cold ablation needle. Background Technology

[0002] The cryoablation technique for tumor treatment using cryoablation needles has become quite mature. The cryoablation needle delivers hot and cold media (such as liquid nitrogen and alcohol vapor) alternately to its heat exchange zone, where the media exchange heat with the tumor tissue to achieve ablation treatment.

[0003] Existing cryoablation needles employ vacuum insulation in non-treatment areas (excluding the heat exchange zone) to ensure safe operation. Creating a vacuum environment within the needle typically involves either dynamic or static vacuum. Dynamic vacuum involves on-site vacuuming, requiring specialized equipment and stringent airtightness at all tubing connections. Furthermore, it inevitably generates noise during the vacuuming process. Static vacuum, on the other hand, involves pre-vacuuming the needle to maintain a vacuum level until use, thus demanding higher standards in manufacturing processes. Utility Model Content

[0004] This invention provides a hot and cold ablation needle to solve at least one of the above-mentioned technical problems.

[0005] This utility model provides a cold and hot ablation needle, including an insulation component and an inlet and outlet component. The insulation component includes an adapter sleeve, a flexible tube connected to the adapter sleeve, and a vacuum insulation sleeve connected to the flexible tube. The inlet and outlet component passes through the adapter sleeve, the flexible tube, and the vacuum insulation sleeve in sequence.

[0006] The thermal insulation component further includes a sealing suction device, which is disposed in the adapter sleeve and / or the flexible tube, and the adapter sleeve and / or the flexible tube is provided with a puncturing mechanism for puncturing the sealing suction device.

[0007] In one embodiment, the adapter sleeve is provided with an adjusting joint, and the adjusting joint is provided with a receiving cavity for accommodating the sealing suction device, the receiving cavity being connected to the flexible tube and the vacuum insulation sleeve;

[0008] The puncture mechanism includes a sealing and shell-breaking device, and the adapter sleeve is provided with a connecting groove for accommodating the sealing and shell-breaking device, the connecting groove being connected to the accommodating cavity;

[0009] The sealing and shell-breaking device is equipped with a shell-breaking needle at its end. The shell-breaking needle is designed to puncture the sealing and air-absorbing device when it moves toward the sealing and air-absorbing device.

[0010] In one embodiment, a sealing ring is provided between the sealing and shell-breaking device and the connecting groove, or

[0011] The bottom end of the connecting groove is provided with an inclined surface, and the sealing and shell-breaking device can deform when it comes into contact with the inclined surface.

[0012] In one embodiment, the vacuum insulation sleeve includes an inner vacuum tube and an outer vacuum tube sleeved outside the inner vacuum tube, and the flexible tube includes an inner flexible shaping hose and an outer flexible shaping hose sleeved outside the inner flexible shaping hose.

[0013] One end of the outer flexible shaping tube is connected to the far end of the outer vacuum tube, and the far end of the inner vacuum tube extends into the outer flexible shaping tube and is connected to one end of the inner flexible shaping tube.

[0014] The sealed air intake device is disposed between the outer flexible shaping hose and the inner tube of the vacuum layer;

[0015] The puncture mechanism includes a shell-breaking device disposed on the inner wall of the outer flexible shaping hose. The shell-breaking device protrudes toward the inner tube of the vacuum layer. The shell-breaking device is configured to approach the sealing suction device and puncture the sealing suction device when the outer flexible shaping hose deforms.

[0016] In one embodiment, the region between the proximal end of the inlet / outlet assembly and the proximal end of the insulation assembly is a heat exchange zone.

[0017] The distal end of the insulation component is connected to the inlet and return flow components via a locking device. The locking device is configured to lock or unlock the insulation component and the inlet and return flow components. When the insulation component is unlocked from the inlet and return flow components, it can move axially relative to the inlet and return flow components, so that the axial length of the heat exchange zone is adjustable.

[0018] In one embodiment, the inlet / outlet assembly includes a connector that extends into the adapter sleeve and is fitted onto the adjusting connector;

[0019] The locking device is arranged radially on the adapter sleeve to axially lock or unlock the connecting joint and the adjusting joint.

[0020] In one embodiment, the adjusting joint is provided with at least two mating grooves that are recessed radially thereon, and the at least two mating grooves are spaced apart axially along the adjusting joint. The connecting joint is provided with a positioning groove that is recessed axially thereon, and the positioning groove can be aligned with any one of the mating grooves.

[0021] The locking device includes a locking pin configured to insert into the positioning groove and the mating groove therewith to axially lock the connecting joint and the adjusting joint; or to disengage from the positioning groove and the mating groove therewith to axially unlock the connecting joint and the adjusting joint.

[0022] In one embodiment, the locking device further includes a fixed sleeve fixedly connected to the adapter sleeve and an elastic element disposed in the fixed sleeve. The locking pin passes through the fixed sleeve and is connected to the elastic element. The locking pin is configured to be pushed by the elastic element to insert into the positioning groove and the mating groove or to compress the elastic element to leave the positioning groove and the mating groove.

[0023] In one embodiment, the ends of the fixing sleeve are respectively provided with a limiting groove and a fixing groove, and the fixing groove is higher than the limiting groove;

[0024] The outer wall of the locking pin is provided with a limiting boss that protrudes outward along its radial direction. The locking pin is constructed such that when it rotates along its axial direction, the limiting boss cooperates with the limiting groove or the fixing groove.

[0025] In one embodiment, the connecting joint is further provided with a guide groove extending along its axial direction, and the adjusting joint is further provided with a positioning adjusting device protruding along its radial direction. The positioning adjusting device is located on the far end side of the farthest mating groove, and the positioning adjusting device is disposed in the guide groove.

[0026] Compared with the prior art, the advantages of this utility model are:

[0027] 1. During use, the sealing suction device is punctured by the puncture mechanism, allowing it to draw in air. This achieves a certain degree of vacuum within the vacuum insulation sleeve and flexible tube, and maintains this vacuum performance for a sufficient time. Therefore, compared to dynamic vacuum operation, the evacuation process of this novel thermal ablation needle is simpler and more convenient. Furthermore, since no vacuuming operation is required before use, there is no vacuuming noise. Additionally, compared to static vacuum operation, this novel thermal ablation needle does not require the creation of a vacuum environment before use, thus solving the problem of maintaining a vacuum level for extended periods in existing technologies.

[0028] 2. The outer and inner flexible shaping tubes can be bent and shaped, so the angle of the cold and hot ablation needle can be adjusted according to the location and angle of the lesion. After puncture, the outer and inner flexible shaping tubes can be adjusted again to make it easier to align their interfaces with the media delivery device, thereby improving the convenience of connection and operation.

[0029] 3. By setting the insulation component to be axially movable relative to the inlet and outlet components, the distance between the proximal end of the insulation component and the proximal end of the inlet and outlet components can be adjusted, thereby changing the axial length of the heat exchange zone. This allows for the adaptation to larger or smaller target areas to be ablated. Therefore, only one cold and hot ablation needle specification is needed to meet the treatment requirements of various tumors, thus reducing the number of ablation needle specifications. Attached Figure Description

[0030] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0031] Figure 1 This is an axial sectional view of the cold and hot ablation needle in an embodiment of this utility model;

[0032] Figure 2 yes Figure 1 A partial structural diagram of the thermal ablation needle is shown.

[0033] Figure 3 yes Figure 1 The axial cross-sectional view of the inlet and outlet flow assembly shown.

[0034] Figure 4 yes Figure 3 A partial structural diagram of the inlet and outlet flow assembly is shown.

[0035] Figure 5 yes Figure 1 Axial sectional view of the insulation component shown;

[0036] Figure 6 and Figure 7 yes Figure 4 The diagram shows the structure of the locking device.

[0037] Figure 8 yes Figure 6 Sectional view at AA;

[0038] Figure 9 yes Figure 5 The diagram shows the structure of the adapter sleeve.

[0039] Figure 10 yes Figure 5 A partial structural schematic diagram of the insulation component shown.

[0040] Figure 11 This is a cross-sectional view of the sealing and shell-breaking device shown in Figure 10;

[0041] Figure 12 yes Figure 5 Enlarged view at point I;

[0042] Figure 13 yes Figure 3 Sectional view at DD;

[0043] Figure 14 yes Figure 13 An axial view of the spiral heat exchanger shown.

[0044] Figure 15 yes Figure 1 An enlarged view of the heat exchange zone shown.

[0045] Figure label:

[0046] 1. Inlet / outlet assembly; 2. Insulation assembly;

[0047] 11. Puncture needle; 12. Heat exchange zone; 13. Inlet tube; 14. Return tube;

[0048] 15. Connecting joint; 151. Positioning groove; 152. Guide groove; 121. Spiral heat exchanger;

[0049] 21. Locking device;

[0050] 211. Locking pin; 212. Elastic element; 213. Fixing sleeve;

[0051] 2111, Limiting boss; 2131, Limiting groove; 2132, Fixing groove;

[0052] 22. Sealing and shell-breaking device; 221. Shell-breaking needle; 222. Sealing ring;

[0053] 23. Flexible tube; 231. Outer flexible shaping hose; 232. Inner flexible shaping hose;

[0054] 24. Vacuum insulation jacket; 241. Outer tube of vacuum layer; 242. Inner tube of vacuum layer;

[0055] 25. Adapter sleeve; 251. Connecting groove;

[0056] 26. Adjusting joint; 261. Mating groove; 262. Positioning and adjusting device; 263. Receiving cavity;

[0057] 27. Bushing; 28. Sealing suction device; 29. ​​Vacuum chamber;

[0058] 281. Shell-breaking device. Detailed Implementation

[0059] The present invention will be further described below with reference to the accompanying drawings.

[0060] like Figure 1As shown, this utility model provides a cold and hot ablation needle, including a heat insulation component 2 and an inlet and outlet component 1 that penetrates the heat insulation component 2. The area between the proximal end of the inlet and outlet component 1 and the proximal end of the heat insulation component 2 is a heat exchange zone 12. Since the area between the proximal end of the inlet and outlet component 1 and the proximal end of the heat insulation component 2 is not covered by the heat insulation component 2, it is a heat exchange zone 12, which can exchange heat with the target tissue, thereby performing ablation treatment on the target tissue.

[0061] The insulation component 2 of this invention is designed to create an insulated environment in areas of the inlet and outlet assembly 1 other than the heat exchange zone 12, thereby ensuring safe operation. The insulation component 2 can achieve its insulation effect by constructing a vacuum layer, or by covering it with insulating material. The following explanation will use the method of constructing a vacuum layer as an example.

[0062] As mentioned above, in the prior art, when using vacuum insulation in non-treatment areas other than the heat exchange zone 12, dynamic vacuum or static vacuum is generally used. The cold and hot ablation needle of this invention differs from the prior art. In use, this invention creates a vacuum environment by puncturing the sealed suction device 28 through a puncture mechanism, thus simplifying operation.

[0063] like Figure 5 As shown, the insulation assembly 2 also includes a sealed suction device 28, a flexible tube 23 connected to the adapter sleeve 25, and a vacuum insulation sleeve 24 connected to the flexible tube 23. Figure 1 As shown, the inlet and outlet assembly 1 passes through the regulating joint 26, the flexible tube 23, and the vacuum insulation sleeve 24 in sequence.

[0064] like Figure 5 As shown, the sealed suction device 28 can be disposed in the adapter sleeve 25 and / or near the end of the flexible tube 23.

[0065] In some alternative implementations, such as Figure 9 As shown, the sealing suction device 28 can be installed in the adapter sleeve 25.

[0066] Specifically, such as Figure 9 As shown, the adapter sleeve 25 is provided with an adjusting joint 26, which has a receiving cavity 263 for accommodating the sealing suction device 28. The receiving cavity 263 is connected to the flexible tube 23 and the vacuum insulation sleeve 24. Therefore, when the sealing suction device 28 is punctured, the getter inside it draws in air, creating a vacuum cavity 29 in the flexible tube 23 and the vacuum insulation sleeve 24 (as shown). Figure 5 (As shown).

[0067] The adapter sleeve 25 is provided with a connecting groove 251 for accommodating the sealing and shell breaking device 22. The connecting groove 251 extends radially along the adapter sleeve 25 and extends to communicate with the receiving cavity 263.

[0068] like Figure 10 As shown, a sealing ring 222 is provided between the sealing and shell-breaking device 22 and the connecting groove 251, such as Figure 11 As shown, the end of the sealing and shell-breaking device 22 is provided with a shell-breaking needle 221, which is configured to pierce the sealing and air-absorbing device 28 when it moves toward the sealing and air-absorbing device 28.

[0069] The sealing and rupture device 22 and the rupture needle 221 are made of a hard metal with low outgassing rate (e.g., stainless steel), and the sealing and suction device 28 is coated with a getter. The sealing and rupture device 22 can be threadedly connected to the connecting groove 251, so that when the sealing and rupture device 22 is rotated, it moves toward the sealing and suction device 28 until the rupture needle 221 contacts and punctures the sealing and suction device 28.

[0070] Since the upper end of the connecting groove 251 is an open end in this embodiment to facilitate the installation of the sealing and shell-breaking device 22, it is necessary to consider the sealing problem after puncturing the sealing suction device 28.

[0071] like Figure 10 As shown, a sealing ring 222 is provided between the sealing and shell-breaking device 22 and the connecting groove 251, which can achieve a seal between the two. Alternatively, the bottom end of the connecting groove 251 can be set as an inclined surface. When the sealing and shell-breaking device 22 moves to the point where its bottom end contacts the inclined surface of the bottom end of the connecting groove 251, the deformation of the sealing and shell-breaking device 22 can achieve a seal between the two.

[0072] In some alternative implementations, such as Figure 12 As shown, the sealed suction device 28 can be installed in the flexible tube 23.

[0073] Specifically, such as Figure 5 and Figure 12 As shown, the vacuum insulation sleeve 24 includes an inner vacuum tube 242 and an outer vacuum tube 241 sleeved outside the inner vacuum tube 242. The flexible tube 23 includes an inner flexible shaping hose 232 and an outer flexible shaping hose 231 sleeved outside the inner flexible shaping hose 232. One end of the outer flexible shaping hose 231 is connected to the distal end of the outer vacuum tube 241, and the other end of the outer flexible shaping hose 231 extends into the adapter sleeve 25 and is connected to the adjusting joint 26. The distal end of the inner vacuum tube 242 extends into the outer flexible shaping hose 231 and is connected to one end of the inner flexible shaping hose 232. The other end of the inner flexible shaping hose 232 extends into the adjusting joint 26.

[0074] The inner flexible shaping hose 232 and the outer flexible shaping hose 231 can be, for example, corrugated pipes, which can be bent and shaped arbitrarily to achieve multi-angle and multi-directional adjustment in order to adjust the puncture angle of the inlet and outlet assembly 1.

[0075] By incorporating an inner flexible shaping hose 232 within the outer flexible shaping hose 231, the strength of the outer flexible shaping hose 231 can be improved, and the outer flexible shaping hose 231 can maintain the desired shape for a longer period of time, thus enhancing operational convenience.

[0076] Therefore, the vacuum chamber 29 may include the cavity 263, the cavity between the outer flexible shaping hose 231 and the inner flexible shaping hose 232, and the cavity between the outer flexible shaping hose 231 and the inner vacuum tube 242.

[0077] like Figure 12 As shown, the sealed suction device 28 is disposed between the outer flexible shaping hose 231 and the vacuum layer inner tube 242. The inner wall of the outer flexible shaping hose 231 is provided with a shell-breaking device 281 protruding towards the vacuum layer inner tube 242. The shell-breaking device 281 is configured to approach the sealed suction device 28 and puncture the sealed suction device 28 when the outer flexible shaping hose 231 is deformed.

[0078] The shell-breaking device 281 can be, for example, a shell-breaking needle with one or more tips. Because the outer flexible shaping hose 231 is malleable, the shell-breaking device 281 can be moved closer to the sealing suction device 28 until it punctures the sealing suction device 28 by bending the outer flexible shaping hose 231. Understandably, in this embodiment, the issue of shell-breaking sealing can be disregarded.

[0079] The puncture device 281 is made of a hard metal with a low outgassing rate (e.g., stainless steel), and the sealed getter device 28 is coated with a getter. When it is punctured, the getter inside can draw in gas, thereby creating a vacuum environment in the vacuum chamber 29.

[0080] Therefore, it is understandable that in the various methods described above, the insulation component 2 does not create a vacuum environment when the sealing suction device 28 is not punctured. Before use, by puncturing the sealing suction device 28, the getter inside it is drawn in, thereby achieving a certain vacuum level in the vacuum chamber 29 and maintaining vacuum performance for a sufficient time. Therefore, the pumping process of this invention is simpler and easier to operate. Furthermore, since a vacuum environment is not formed before use, it also solves the problem of not being able to maintain a vacuum level for a long time in the prior art.

[0081] After the sealed suction device 28 is punctured, the angle of the cold and hot ablation needle can be adjusted according to the location and angle of the lesion through the inner flexible shaping tube 232 and the outer flexible shaping tube 231 to facilitate puncture and connection. For example, the outer flexible shaping tube 231 and the inner flexible shaping tube 232 can be bent to a 90° angle for puncture. Adjustments can be made in real time during the puncture process as needed. After the puncture is completed, the outer flexible shaping tube 231 and the inner flexible shaping tube 232 can be readjusted horizontally and vertically according to the puncture completion status and ease of operation until the ideal state is achieved, facilitating surgical operation and improving user experience.

[0082] like Figure 1 As shown, the cold and hot ablation needle of this invention is also configured such that the axial length of the heat exchange zone 12 is adjustable. For example, its minimum axial length is A and its maximum axial length is B, thereby adapting to the ablation requirements of different lesions.

[0083] like Figure 1 As shown, the distal end of the insulation component 2 is connected to the inlet / outlet assembly 1 via a locking device 21. The locking device 21 is configured to lock or unlock the insulation component 2 and the inlet / outlet assembly 1. When the locking device 21 unlocks the insulation component 2 and the inlet / outlet assembly 1, the insulation component 2 can move axially relative to the inlet / outlet assembly 1, allowing the axial length of the heat exchange zone 12 to increase or decrease, thereby adapting to larger or smaller target areas to be ablated. When the insulation component 2 moves to the point where the axial length of the heat exchange zone 12 reaches the required length, the locking device 21 can lock the insulation component 2 and the inlet / outlet assembly 1, thus facilitating the ablation operation.

[0084] Specifically, such as Figure 2 As shown, the insulation component 2 includes an adapter sleeve 25 and an adjusting joint 26 disposed inside the adapter sleeve 25. Figure 3 and Figure 4 As shown, the inlet / outlet assembly 1 includes a connecting connector 15. The connecting connector 15 extends from the distal end of the adapter sleeve 25 into the adapter sleeve 25 and is fitted onto the adjusting connector 26.

[0085] like Figure 2 As shown, the locking device 21 is arranged radially on the adapter sleeve 25, and the locking device 21 can axially lock or unlock the connecting joint 15 and the adjusting joint 26.

[0086] Specifically, such as Figure 2 and Figure 9 As shown, the adjusting joint 26 is provided with at least two mating grooves 261 that are recessed radially therein (e.g., Figure 5 As shown), at least two mating grooves 261 are spaced apart along the axial direction of the adjusting joint 26. Figure 3 and Figure 4As shown, the connecting joint 15 is provided with a positioning groove 151 recessed along its axial direction. When the adapter sleeve 25 and the adjusting joint 26 move along their axial direction, the positioning groove 151 can be aligned with any mating groove 261 (i.e., their axes are aligned) or the positioning groove 151 can be offset from each mating groove 261.

[0087] like Figure 6 , Figure 7 and Figure 8 As shown, the locking device 21 includes a locking pin 211, a fixing sleeve 213 fixedly connected to the adapter sleeve 25, and an elastic element 212 (e.g., a spring) disposed in the fixing sleeve 213. The locking pin 211 is configured to insert into the positioning groove 151 and the mating groove 261 therewith to axially lock the connecting joint 15 and the adjusting joint 26; or to disengage from the positioning groove 151 and the mating groove 261 therewith to axially unlock the connecting joint 15 and the adjusting joint 26.

[0088] like Figure 8 As shown, the locking pin 211 passes through the fixing sleeve 213 and is connected to the elastic element 212. The locking pin 211 is configured to be pushed by the elastic element 212 and inserted into the positioning groove 151 and the mating groove 261, or to be compressed by the elastic element 212 and removed from the positioning groove 151 and the mating groove 261.

[0089] like Figure 2 and Figure 8 As shown, without external force, the positioning groove 151 aligns with the mating groove 261 closest to the far end. The elastic element 212 pushes the locking pin 211 downward. The lower end of the locking pin 211 protrudes from the fixing sleeve 213 and passes through the positioning groove 151 and the mating groove 261 in the radial direction, thereby axially locking the connecting joint 15 and the adjusting joint 26 (and the adapter sleeve 25).

[0090] When unlocking is required, pulling the locking pin 211 upwards compresses the elastic element 212, causing the lower end of the locking pin 211 to retract into the fixing sleeve 213. This removes the constraint between the positioning groove 151 and the mating groove 261, thereby unlocking the connecting joint 15 and the adjusting joint 26 (and the adapter sleeve 25). The adapter sleeve 25 (and the adjusting joint 26) can then be pulled axially to change its relative position with the connecting joint 15, allowing the positioning groove 151 to align with the other mating grooves 261. At this point, releasing the locking pin 211 will lock the positioning groove 151 and the mating groove 261.

[0091] like Figure 1As shown, the maximum axial length of the heat exchange zone 12 is B, and the minimum axial length is A. When the adapter sleeve 25 is pulled towards the distal end, that is, when the insulation component 2 moves towards the distal end relative to the inlet / return assembly 1, the distance between the proximal end of the insulation component 2 and the proximal end of the inlet / return assembly 1 increases, thereby increasing the axial length of the heat exchange zone 12. Conversely, when the adapter sleeve 25 is pushed towards the proximal end, that is, when the insulation component 2 moves towards the proximal end relative to the inlet / return assembly 1, the distance between the proximal end of the insulation component 2 and the proximal end of the inlet / return assembly 1 decreases, thereby decreasing the axial length of the heat exchange zone 12.

[0092] Understandably, when the axial length of the heat exchange zone 12 is B, the locking pin 211 locks the positioning groove 151 into the mating groove 261 closest to the proximal end (e.g., Figure 9 The rightmost mating groove 261); when the axial length of the heat exchange zone 12 is A, the locking pin 211 locks the positioning groove 151 into the mating groove 261 closest to the farthest end (e.g., the rightmost mating groove 261); when the axial length of the heat exchange zone 12 is A, the locking pin 211 locks the positioning groove 151 into the mating groove 261 closest to the farthest end (e. Figure 9 The leftmost mating groove 261).

[0093] like Figure 6 and Figure 7 As shown, the ends of the fixing sleeve 213 are respectively provided with a limiting groove 2131 and a fixing groove 2132, and the fixing groove 2132 is higher than the limiting groove 2131. Figure 6 and Figure 8 As shown, the outer wall of the locking pin 211 is provided with a limiting boss 2111 that protrudes outward along its radial direction. The locking pin 211 is constructed such that when it rotates along its axial direction, the limiting boss 2111 cooperates with the limiting groove 2131 or the fixing groove 2132.

[0094] Specifically, when the locking pin 211 is pulled upward, the limiting boss 2111 disengages from the limiting groove 2131, the elastic element 212 is compressed, and the lower end of the locking pin 211 retracts into the fixing sleeve 213. When the locking pin 211 is rotated, its limiting boss 2111 is stuck in the fixing groove 2132. At this time, the locking pin 211 can be held in the state of retracting into the fixing sleeve 213, so the adapter sleeve 25 can be pushed or pulled to adjust the axial length of the heat exchange zone 12.

[0095] When the axial length of the heat exchange zone 12 is adjusted to a suitable length, the locking pin 211 is rotated in the opposite direction. The limiting boss 2111 disengages from the fixing groove 2132, and the elastic element 212 pushes the locking pin 211 out of the fixing sleeve 213, thereby locking the positioning groove 151 and the corresponding mating groove 261. At the same time, the limiting boss 2111 is stuck in the limiting groove 2131, fixing the position of the locking pin 211.

[0096] like Figure 4 As shown, the connecting joint 15 is also provided with a guide groove 152 extending along its axial direction. Figure 9As shown, the adjusting joint 26 is also provided with a positioning adjusting device 262 that protrudes radially therefrom, and the positioning adjusting device 262 is located on the far end side of the mating groove 261 at the farthest end, and the positioning adjusting device 262 is disposed in the guide groove 152. The positioning adjusting device 262 can be constructed, for example, as a protrusion or the like.

[0097] When the adapter sleeve 25 is moved, the guide groove 152 can guide the movement of the adapter sleeve 25 (insulation component 2). Due to the cooperation between the positioning adjustment device 262 and the guide groove 152, the adapter sleeve 25 can only move axially and cannot rotate radially, so that the adapter sleeve 25 will not be misaligned with the inlet and outlet flow component 1 in the radial direction, thus ensuring the stability of the movement of the adapter sleeve 25.

[0098] Therefore, by moving the adapter sleeve 25, the axial position of the insulation component 2 and the inlet / outlet component 1 changes, thereby making the axial length of the heat exchange zone 12 adjustable. Thus, a single specification of hot and cold ablation needle can be adapted to ablation treatment of different lesions.

[0099] like Figure 3 and Figure 4 As shown, the inlet and outlet assembly 1 may include an inlet pipe 13 and an outlet pipe 14 disposed outside the inlet pipe 13. A medium for ablation (e.g., liquid nitrogen) flows through the inlet pipe 13. The medium flows into the inlet pipe 13, flows to the puncture needle 11 to complete the heat exchange task, and then returns along the outlet pipe 14. Figure 15 As shown.

[0100] The near end of the outer vacuum tube 241 is also provided with a bushing 27 with a bevel. A part of the bushing 27 extends between the outer vacuum tube 241 and the inner vacuum tube 242 to connect the outer vacuum tube 241 and the inner vacuum tube 242.

[0101] Both the inlet pipe 13 and the return pipe 14 extend from the proximal end of the bushing 27; therefore, it can be understood that the distance between the proximal end of the puncture needle 11 and the proximal end of the bushing 27 is the axial length of the heat exchange zone 12. Figure 15 As shown, the axial length of heat exchange zone 12 is the shortest length (A).

[0102] By pulling the adapter sleeve 25 backward, the proximal end of the bushing 27 is moved further away from the proximal end of the puncture needle 11, that is, the axial length of the heat exchange zone 12 increases.

[0103] Understandably, the difference between the maximum axial length B and the minimum axial length A of the heat exchange zone 12 is equal to the distance between the mating groove 261 closest to the proximal end and the mating groove 261 closest to the distal end, which is the limit distance that the transition sleeve 25 can move. Therefore, the length of the heat exchange zone 12 can be increased by adjusting the number of mating grooves 261 and the distance between them.

[0104] like Figure 3 , Figure 13 and Figure 14 As shown, the portion of the inlet / outlet assembly 1 located in the heat exchange zone 12 is equipped with heat exchange fins or a spiral heat exchanger 121. More specifically, a heat exchange fin or spiral heat exchanger 121 is provided between the inlet pipe 13 and the return pipe 14 of the heat exchange zone 12. The heat exchange fins or spiral heat exchanger 121 are designed to increase the heat exchange area, thereby ensuring sufficient heat exchange between the heat exchange zone 12 and the target area.

[0105] The heat exchange fins or spiral heat exchanger 121 can adopt existing structures and configurations, which will not be elaborated upon in this utility model.

[0106] Unless otherwise specified above, "distal" refers to the end of the puncture needle 11 further away from the inlet / outlet assembly 1, and "proximal" refers to the end closer to the puncture needle 111 (e.g., Figure 1 (As shown).

[0107] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A cold and hot ablation needle, characterized in that: The invention comprises a heat insulation component (2) and an inlet and return flow component (1), wherein the heat insulation component (2) comprises an adapter sleeve (25), a flexible pipe (23) connected to the adapter sleeve (25), and a vacuum heat insulation sleeve (24) connected to the flexible pipe (23), and the inlet and return flow component (1) passes through the adapter sleeve (25), the flexible pipe (23), and the vacuum heat insulation sleeve (24) in sequence; The thermal insulation assembly (2) further comprises a sealing air suction device (28), wherein the sealing air suction device (28) is arranged in the adapter sleeve (25) and / or the flexible tube (23), and a puncturing mechanism for puncturing the sealing air suction device (28) is arranged in the adapter sleeve (25) and / or the flexible tube (23).

2. The cold and hot ablation needle according to claim 1, characterized in that: The adapter sleeve (25) is provided with an adjusting joint (26), and the adjusting joint (26) is provided with a receiving cavity (263) for receiving the sealing air suction device (28), and the receiving cavity (263) is connected with the flexible tube (23) and the vacuum insulation sleeve (24); The piercing mechanism comprises a sealing and shell-breaking device (22), and the adapter sleeve (25) is provided with a connecting groove (251) for accommodating the sealing and shell-breaking device (22), and the connecting groove (251) is communicated with the accommodating cavity (263); A shell-breaking needle (221) is provided at the end of the sealing and shell-breaking device (22), and the shell-breaking needle (221) is configured to puncture the sealing and air-inhaling device (28) when it moves toward the sealing and air-inhaling device (28).

3. The cold and hot ablation needle according to claim 2, characterized in that: A sealing ring (222) is provided between the sealing and shell breaking device (22) and the connecting groove (251), or The bottom end of the connecting groove (251) is provided with an inclined surface, and the sealing and shell breaking device (22) can be deformed when in contact with the inclined surface.

4. The cold and hot ablation needle according to any one of claims 1 to 3, characterized in that: The vacuum insulation sleeve (24) comprises a vacuum layer inner tube (242) and a vacuum layer outer tube (241) sleeved outside the vacuum layer inner tube (242); the flexible tube (23) comprises an inner layer flexible shaped hose (232) and an outer layer flexible shaped hose (231) sleeved outside the inner layer flexible shaped hose (232); One end of the outer layer flexible shaping hose (231) is connected to the distal end of the vacuum layer outer tube (241), and the distal end of the vacuum layer inner tube (242) extends into the outer layer flexible shaping hose (231) and is connected to one end of the inner layer flexible shaping hose (232); The sealing air suction device (28) is arranged between the outer layer flexible shaping hose (231) and the vacuum layer inner tube (242); The puncturing mechanism comprises a shell-breaking device (281) arranged on the inner wall of the outer flexible shaping hose (231), and the shell-breaking device (281) is configured to approach the sealing air-inhaling device (28) and puncture the sealing air-inhaling device (28) when the outer flexible shaping hose (231) is deformed.

5. The cold and hot ablation needle according to claim 2 or 3, characterized in that: The area between the proximal end of the inlet and return flow component (1) and the proximal end of the insulation component (2) is a heat exchange area (12); The distal end of the heat insulation component (2) is connected to the inlet and return flow component (1) via a locking device (21), and the locking device (21) is configured to lock or unlock the heat insulation component (2) and the inlet and return flow component (1). The heat insulation component (2) is configured to be movable axially relative to the inlet and return flow component (1) when it is unlocked from the inlet and return flow component (1), so that the axial length of the heat exchange zone (12) is adjustable.

6. The cold and hot ablation needle according to claim 5, characterized in that: The inlet and return flow assembly (1) comprises a connecting joint (15), wherein the connecting joint (15) extends into the adapter sleeve (25) and is sleeved on the adjusting joint (26); The locking device (21) is arranged on the adapter sleeve (25) along the radial direction of the adapter sleeve (25) to axially lock or unlock the connecting joint (15) and the adjusting joint (26).

7. The cold and hot ablation needle according to claim 6, characterized in that: The adjusting joint (26) is provided with at least two matching grooves (261) recessed along its radial direction, and the at least two matching grooves (261) are arranged at intervals along the axial direction of the adjusting joint (26); the connecting joint (15) is provided with a positioning groove (151) recessed along its axial direction, and the positioning groove (151) can be aligned with any one of the matching grooves (261); The locking device (21) comprises a locking pin (211), and the locking pin (211) is configured to be inserted into the positioning groove (151) and the matching groove (261) therewith to axially lock the connecting joint (15) and the adjusting joint (26); or to be disengaged from the positioning groove (151) and the matching groove (261) therewith to axially unlock the connecting joint (15) and the adjusting joint (26).

8. The cold and hot ablation needle according to claim 7, characterized in that: The locking device (21) further comprises a fixing sleeve (213) fixedly connected to the adapter sleeve (25) and an elastic member (212) arranged in the fixing sleeve (213); the locking pin (211) passes through the fixing sleeve (213) and is connected to the elastic member (212); the locking pin (211) is configured to be pushed by the elastic member (212) to be inserted into the positioning groove (151) and the matching groove (261) or to compress the elastic member (212) to leave the positioning groove (151) and the matching groove (261).

9. The cold and hot ablation needle according to claim 8, characterized in that: The ends of the fixing sleeve (213) are respectively provided with a limiting groove (2131) and a fixing groove (2132), and the fixing groove (2132) is higher than the limiting groove (2131); A limiting boss (2111) is provided on the outer wall of the locking pin (211) and protrudes radially outwards. The locking pin (211) is configured such that when the locking pin (211) rotates along its axial direction, the limiting boss (2111) cooperates with the limiting groove (2131) or the fixing groove (2132).

10. The cold and hot ablation needle according to claim 6, characterized in that: The connecting joint (15) is also provided with a guide groove (152) extending along its axial direction, and the adjusting joint (26) is also provided with a positioning adjustment device (262) protruding along its radial direction, wherein the positioning adjustment device (262) is located on the distal side of the farthest matching groove (261), and the positioning adjustment device (262) is arranged in the guide groove (152).

Images