Ablation needle system

Abstract

The present application relates to ablation needle system, it relates to the field of ablation technology for guaranteeing convenient operation while improving flexible performance. The ablation needle system of the present application comprises a non-vacuum fluid transmission device comprising a first transmission unit and a second transmission unit in communication with each other, the second transmission unit comprising a second inlet pipe and a second return pipe; and an ablation needle detachably connected with the second transmission unit, the ablation needle comprising a sealed vacuum jacket and an inlet-return flow assembly penetrating through the sealed vacuum jacket and being connected with the vacuum; the inlet-return flow assembly comprising an inlet core pipe in fluid communication with the second inlet pipe to form an inlet flow path and an inner pipe sleeved outside the inlet core pipe, the inner pipe being in fluid communication with the second return pipe; wherein at least a portion of the inner pipe is provided with a buffer device.

Description

[0001] This application is a divisional application of application number CN202210817968.8, entitled "Non-vacuum fluid transport device and ablation needle system". Technical Field

[0002] This invention relates to the field of ablation technology, and particularly to an ablation needle system. Background Technology

[0003] In surgical procedures using cryoablation to remove target tissue, a delivery device is needed to connect the cryosurgical system to the ablation needle. This device delivers the therapeutic fluid to the lesion, where the liquid refrigerant absorbs heat through evaporation, carrying away heat from the lesion and lowering the temperature of the target ablation site. This process destroys the diseased cells, achieving the therapeutic goal. Existing ablation needle systems typically have the delivery device and the ablation needle coaxial, resulting in an excessively large system length, which is inconvenient for operation; furthermore, its flexibility needs improvement. Summary of the Invention

[0004] This invention provides an ablation needle system that improves flexibility while ensuring ease of operation.

[0005] According to a first aspect of the present invention, a non-vacuum fluid transfer device is provided, comprising a first transfer unit and a second transfer unit connected to each other, wherein the first transfer unit is used to transfer fluid to the second transfer unit or to receive fluid returned from the second transfer unit;

[0006] The first transmission unit includes a first inlet pipe, a first return pipe, and an outer casing, wherein the first inlet pipe and the first return pipe are arranged side by side inside the outer casing;

[0007] The second transmission unit includes:

[0008] A second inlet pipe is provided with a first adapter, which connects the second inlet pipe to the first inlet pipe. The flow direction of the fluid in the first inlet pipe is redirected by the first adapter so that it flows into the second inlet pipe.

[0009] The second return pipe is sleeved outside the second inlet pipe. The second return pipe is provided with a second adapter. The second return pipe is connected to the first return pipe through the second adapter. The flow direction of the fluid in the second return pipe is changed through the second adapter to return to the first return pipe.

[0010] The first adapter and the second adapter are connected by a cooperation mechanism.

[0011] In one embodiment, the first adapter includes an adapter, wherein the adapter is provided with a first mating hole and a second mating hole forming fluid communication;

[0012] The first mating hole extends along a first direction to accommodate the first inlet pipe;

[0013] The second mating hole is a stepped hole extending along a second direction at an angle to the first direction, and the second mating hole is used to accommodate the second inlet pipe;

[0014] The second inlet pipe has a mating end face, which abuts against the upper stepped surface in the second mating hole.

[0015] In one embodiment, the second adapter includes a three-way adapter, wherein the three-way adapter is provided with a third mating hole and a fourth mating hole;

[0016] The third mating hole extends along the first direction and is used to accommodate the first return pipe of the rod.

[0017] The fourth mating hole is constructed as a stepped hole that passes through the three-way adapter in the second direction. The fourth mating hole is used to accommodate the second return pipe, and the through end face of the second return pipe abuts against the lower stepped surface in the fourth mating hole.

[0018] The third mating hole, the fourth mating hole, the second mating hole, and the first mating hole are in fluid communication.

[0019] In one embodiment, the adapter is configured as an L-shaped structure, and the portion of the adapter extending along the second direction is provided with a positioning platform and a first conical outer wall extending from the positioning platform. The first conical outer wall extends into the fourth mating hole, and the end of the tee adapter abuts against the positioning platform.

[0020] In one embodiment, the first transmission unit further includes:

[0021] The insulating part, located within the outer sleeve and covering the outer walls of the first inlet pipe and the first return pipe; and

[0022] A flexible reinforcing section is disposed between the heat insulation section and the inner wall of the outer sleeve, for supporting the first inlet pipe and the first return pipe;

[0023] The flexible reinforcing part extends spirally along the axial direction of the outer sleeve.

[0024] In one embodiment, the second transmission unit further includes:

[0025] A handle assembly, one side of which is sealed to the outer sleeve, the handle assembly accommodating the first adapter and the second adapter; and

[0026] A first quick-connect device is provided, wherein the other side of the handle assembly is sealed to the first quick-connect device, and the first quick-connect device accommodates the second inlet pipe and the second return pipe.

[0027] In one embodiment, the space between the outer tube and the insulation portion and the flexible reinforcement portion is filled with an aerogel material;

[0028] The handle assembly is filled with aerogel material between itself and the first and second adapters.

[0029] In one embodiment, a mating groove is provided on the outer wall of the first quick-connect device. The mating groove has an inclined wall and is used to form a rolling engagement connection or an elastic engagement connection with the second quick-connect device of the ablation needle.

[0030] In one embodiment, the first quick-connect device has a wedge-shaped end face, on which a reflux hole is provided extending axially along the first quick-connect device, and the reflux hole is in fluid communication with the second reflux pipe.

[0031] According to a second aspect of the present invention, an ablation needle system is provided, which includes the above-described non-vacuum fluid transport device and further includes an ablation needle, the ablation needle being detachably connected to the second transport unit;

[0032] The ablation needle includes a sealing vacuum jacket and an inlet / outlet assembly that penetrates the sealing vacuum jacket and forms a vacuum connection with it;

[0033] The inlet and return flow assembly includes an inlet core tube that is in fluid communication with the second inlet pipe and an inner tube sleeved outside the inlet core tube, the inner tube being in fluid communication with the second return pipe;

[0034] At least a portion of the inner tube is provided with a buffer device.

[0035] In one embodiment, an outer tube is sleeved around the inner tube, and both the outer wall of the inner tube and the inner wall of the outer tube are coated with a thin-film getter.

[0036] In one embodiment, the ablation needle further includes an integrally or separately configured needle tip and an energy exchange tube, wherein the energy exchange tube is directly or indirectly connected to the outer tube.

[0037] The energy exchange tube includes a heat insulation cavity and a heat exchange cavity that are physically isolated along its axial direction, and the inlet core tube extends into the heat exchange cavity; the heat exchange cavity is in fluid communication with the inlet core tube and the inner tube respectively, such that the fluid flowing out of the inlet core tube is turned back in the heat exchange cavity and flows back to the space between the inlet core tube and the inner tube.

[0038] In one embodiment, the ablation needle further includes a conversion sleeve and a second quick-connect device that is sealed to the conversion sleeve;

[0039] The conversion sleeve includes a sealed chamber, a guide tube penetrating the sealed chamber, and a drainage hole circumferentially arranged around the guide tube. The drainage hole is in fluid communication with the sealed chamber, and the inlet core tube penetrates the guide tube.

[0040] The second inlet pipe and the second return pipe pass through the second quick-connect device and extend into the sealed chamber;

[0041] The second inlet pipe is in fluid communication with the inlet core pipe to form an inlet flow path;

[0042] The second return pipe is in fluid communication with the return path formed by the drainage hole and the sealed chamber to form a return path;

[0043] The axial distance between the inner wall of the sealed chamber and the seal in the second quick-connect device is related to the low-temperature resistance of the seal.

[0044] The seal is used to form a seal between the second quick-connect device and the first quick-connect device of the non-vacuum fluid transfer device.

[0045] In one embodiment, the ablation needle further includes a sealing vacuum jacket, the sealing vacuum jacket being provided with an inlet / outlet and a sealing hole, the inlet / outlet assembly passing through the inlet / outlet and the sealing hole;

[0046] The sealing vacuum jacket is also provided with at least four sealing ports distributed circumferentially along the inlet / outlet and sealing holes.

[0047] According to a third aspect of the present invention, the present invention provides a fluid channel, and more specifically, the present invention provides a fluid channel for an ablation needle system, comprising an inlet flow path and an outlet flow path;

[0048] The inflow path includes a first inflow path and a second inflow path. The flow direction of the fluid in the first inflow path is changed so that it flows into the second inflow path.

[0049] The return path includes a third return path and a fourth return path. The flow direction of the fluid in the third return path is changed so that it flows into the fourth return path.

[0050] In this process, the flow direction of the fluid in the first inlet path is opposite to that in the fourth return path, and the flow direction of the fluid in the second inlet path is opposite to that in the third return path.

[0051] In one embodiment, the flow path further includes a third flow path, wherein the first flow path, the second flow path and the third flow path are defined by a first transmission unit, a second transmission unit, an ablation needle, a first adapter and a second adapter.

[0052] In one embodiment, the first transmission unit includes a first inlet tube, the second transmission unit includes a second inlet tube, the ablation needle includes an inlet core tube, a first inlet path is defined by the first inlet tube of the first transmission unit, a second inlet path is defined by the second inlet tube of the second transmission unit, and a third inlet path is defined by the inlet core tube of the ablation needle.

[0053] In one embodiment, the axes of the first inlet pipe and the second inlet pipe are perpendicular, and the first inlet pipe is in fluid communication with the second inlet pipe through a first adapter; the first inlet pipe is redirected through the first adapter to flow into the second inlet pipe;

[0054] The first adapter includes an adapter for forming a fluid connection between a first inlet pipe and a second inlet pipe. The adapter is provided with a first mating hole and a second mating hole for forming the fluid connection. The first mating hole extends along a first direction and is used to accommodate the first inlet pipe. The second mating hole is constructed as a stepped hole extending along a second direction at an angle to the first direction and is used to accommodate the second inlet pipe.

[0055] In one embodiment, the ablation needle further includes a conversion sleeve and a second quick-connect device sealed to the conversion sleeve. The conversion sleeve includes a sealed chamber and a guide tube extending through the sealed chamber, with an inlet core tube extending through the guide tube. A second inlet tube extends through the second quick-connect device and into the sealed chamber of the conversion sleeve. The second inlet tube accommodates a portion of the guide tube and thus a portion of the inlet core tube, thereby being in fluid communication with the inlet core tube.

[0056] The second inlet pipe and the second return pipe pass through the second quick-connect device and extend into the sealed chamber of the conversion sleeve. The inlet core pipe passes through the guide pipe and is sealed to the guide pipe at its end. The inlet core pipe and the guide pipe extend into the second inlet pipe together, so that the inlet core pipe and the second inlet pipe are in fluid communication.

[0057] In one embodiment, the return path further includes a first return path and a second return path, wherein the first return path, the second return path, the third return path and the fourth return path are defined by a first transmission unit, a second transmission unit, an ablation needle, a first adapter and a second adapter.

[0058] In one embodiment, the ablation needle further includes an inlet / outlet assembly, which includes an inlet core tube in fluid communication with the second inlet tube and an inner tube sleeved outside the inlet core tube, the inner tube being in fluid communication with the second outlet tube; the first outlet outlet path is defined by the inner wall of the inner tube and the outer wall of the inlet core tube.

[0059] In one embodiment, the end of the conversion sleeve opposite to the sealing chamber is also provided with a groove that is in fluid communication with the sealing chamber; the groove is in fluid communication with the sealing chamber through a drainage hole, and a drainage hole extending toward the sealing chamber is provided at the bottom of the groove; the drainage hole is located in the circumferential direction of the guide tube, and the drainage hole is in fluid communication with the groove and the sealing chamber respectively, and the second return path is defined by the groove, the drainage hole and the sealing chamber of the conversion sleeve.

[0060] In one embodiment, the inner tube is connected to the groove, and the end of the inner tube abuts against the inner wall of the groove. The inlet core tube is connected to the guide tube, so that the first reflux path defined by the inner wall of the inner tube and the outer wall of the inlet core tube is in fluid communication with the drainage hole, and the first reflux path is in fluid communication with the second reflux path.

[0061] In one embodiment, the sum of the depth of the groove and the depth of the drainage hole in the axial direction is the axial wall thickness of the sealed chamber.

[0062] In one embodiment, the third reflux path is defined by the reflux hole of the first quick-connect device, the inner wall of the second reflux pipe, and the outer wall of the second inlet pipe; the first quick-connect device is sealed in connection with the sealed chamber of the conversion sleeve, and the reflux hole at the end of the first quick-connect device is in fluid communication with the sealed chamber, so that the second reflux path and the third reflux path are in fluid communication.

[0063] In one embodiment, the fourth return path is defined by a first return pipe, which is connected to a second return pipe via a second adapter. The flow direction of the fluid in the second return pipe is redirected by the second adapter to return to the first return pipe.

[0064] The axes of the first inlet pipe and the second inlet pipe are perpendicular. The second adapter includes a three-way adapter for sealing connection with the adapter. The three-way adapter is provided with a third mating hole and a fourth mating hole. The third mating hole is used to accommodate the first return pipe. The fourth mating hole is constructed as a stepped hole that passes through the three-way adapter. One side of the fourth mating hole accommodates the first conical outer wall of the adapter, so that the three-way adapter and the adapter form a sealed connection at that point. The other side of the fourth mating hole accommodates the second return pipe, and the through end face of the second return pipe abuts against the lower stepped surface in the fourth mating hole. The third mating hole, the fourth mating hole, the second mating hole, and the first mating hole are in fluid communication, thereby making the third return path and the fourth return path in fluid communication. Compared with the prior art, the advantages of the present invention are that, by cooperating with the first transfer device and the first transmission unit, cooperating with the second transfer unit and the second transfer device, and cooperating with the first transfer device and the second transfer device, the fluid in the first transmission unit can change its flow direction and flow into the second transmission unit, thereby ensuring that the size of the non-vacuum fluid transmission device in the length direction is not too large, and the included angle between the first transmission unit and the second transmission unit is more conducive to puncture and positioning; in addition, since both the first transmission unit and the second transmission unit are non-vacuum structures, their flexibility can be improved. Attached Figure Description

[0065] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0066] Figure 1 This is an axial sectional view of the non-vacuum fluid transfer device during installation and use in an embodiment of the present invention;

[0067] Figure 2 This is an axial sectional view of the non-vacuum fluid transport device in an embodiment of the present invention;

[0068] Figure 3 yes Figure 2 The cross-sectional view of the non-vacuum fluid transfer device shown conceals components such as the handle assembly and outer sleeve to more clearly show the first and second adapters;

[0069] Figure 4 yes Figure 3 An axial sectional view of the first adapter shown;

[0070] Figure 5 yes Figure 3 An axial sectional view of the second adapter shown;

[0071] Figure 6 yes Figure 2 A radial view of the non-vacuum fluid transport device shown;

[0072] Figure 7This is an axial cross-sectional view of the ablation needle that cooperates with the non-vacuum fluid transport device in an embodiment of the present invention;

[0073] Figure 8 yes Figure 7 Axial sectional view of the inlet / outlet assembly;

[0074] Figure 9 yes Figure 8 A magnified view at point N;

[0075] Figure 10 yes Figure 8 Enlarged view at point P;

[0076] Figure 11 yes Figure 8 An axial sectional view of the energy exchange tube shown.

[0077] Figure 12 yes Figure 8 The axial sectional view of the conversion sleeve shown;

[0078] Figure 13 yes Figure 8 The diagram shows the fit between the conversion sleeve, the inlet core tube, and the inner tube.

[0079] Figure 14 yes Figure 7 The axial cross-sectional view of the sealing vacuum jacket shown;

[0080] Figure 15 yes Figure 7 The side view of the sealing vacuum jacket shown;

[0081] Figure 16 This is an enlarged view of one embodiment of the right side of the ablation needle of the present invention;

[0082] Figure 17 This is an enlarged view of another embodiment of the right side of the ablation needle of the present invention;

[0083] Figure 18 yes Figure 1 A magnified view at point M;

[0084] Figure 19 yes Figure 1 A magnified view at point Q;

[0085] Figure 20 This is a radial cross-sectional view of the second quick connection device of the ablation needle system of the present invention after it is connected to the first quick connection device;

[0086] Figure 21 yes Figure 2 An axial sectional view of the first quick-connect device shown.

[0087] Figure 22This is an axial sectional view of the second quick connection device connected to the first quick connection device in another embodiment of the ablation needle system of the present invention;

[0088] Figure 23 yes Figure 22 Enlarged view of the upper part of the ablation needle system shown;

[0089] Figure 24 yes Figure 22 An axial sectional view of the second quick-connect device is shown.

[0090] Figure 25 yes Figure 23 An axial sectional view of the elastic top bead shown.

[0091] Figure 26 This is an axial sectional view of the first quick-connect device and the conversion sleeve after they are connected in an embodiment of the present invention.

[0092] Figure label:

[0093] 100 - First transmission unit;

[0094] 110 - First inlet pipe; 120 - First return pipe; 130 - Insulation section; 140 - Flexible reinforcement section; 150 - Outer casing;

[0095] 200 - Second transmission unit;

[0096] 210 - Second inlet pipe; 220 - Second return pipe; 230 - First adapter; 240 - Second adapter; 260 - First quick connection device; 270 - Handle assembly; 211 - Mating face; 221 - Through face;

[0097] 231-Adapter; 232-First mating hole; 233-Second mating hole; 234-Upper stepped surface; 235-Second conical outer wall; 237-First conical outer wall; 236-Positioning platform;

[0098] 241 - Tee adapter; 242 - Third mating hole; 243 - Fourth mating hole; 244 - Lower step surface;

[0099] 261-Matching groove; 2611-Inclined wall; 262-Return hole; 263-Wedge-shaped end face;

[0100] 300 - Ablation needle; 310 - Inlet / outlet reflux assembly;

[0101] 311-Needle tip; 312-Energy exchange tube; 313-Inner tube; 314-Outer tube; 315-Conversion sleeve; 316-Buffer device; 317-Inlet core tube; 318-Connecting tube;

[0102] 301 - Second quick-connect device; 302 - Sealing vacuum jacket; 303 - Protective sleeve;

[0103] 304 - Flexible sliding sleeve; 3041 - Elastic element; 3042 - Top block;

[0104] 305 - Getter; 306 - Seal;

[0105] 307 - Flexible locking element; 3071 - Top ball; 3072 - Spring; 3073 - Piston;

[0106] 308 - Connecting sleeve; 3081 - Connecting hole; 3082 - Sealing groove; 3083 - Recess;

[0107] 3011 - First flange; 3012 - Ball bearing; 3013 - Second flange; 3014 - Ball bearing bore;

[0108] 3021 - First cavity; 3022 - Second cavity; 3023 - Sealing port; 3024 - Inlet / outlet and sealing hole; 3025 - Mating platform;

[0109] 3031 - Mating groove;

[0110] 3121 - Insulation cavity; 3122 - Heat exchange cavity;

[0111] 3151 - Sealed chamber; 3152 - Guide tube; 3153 - Connecting boss; 3154 - Groove; 3155 - Drainage hole;

[0112] 31 - First reflow path; 32 - Second reflow path; 33 - Third reflow path; 34 - Fourth reflow path. Detailed Implementation

[0113] The invention will now be further described with reference to the accompanying drawings.

[0114] According to a first aspect of the invention, the invention provides a non-vacuum fluid transport device, more specifically, for use in an ablation needle system, such as... Figure 1 As shown, the non-vacuum fluid transport device of the present invention can transport fluid to or receive fluid returned from the ablation needle 300 in the ablation needle system. The fluid described herein can be a working medium suitable for cryoablation therapy, such as liquid nitrogen and anhydrous ethanol.

[0115] like Figure 2 and Figure 3 As shown, the non-vacuum fluid transfer device of the present invention includes a first transfer unit 100 and a second transfer unit 200 that are interconnected. The first transfer unit 100 is used to transfer fluid to the second transfer unit 200 or to receive fluid returned from the second transfer unit 200.

[0116] The first transmission unit 100 includes a first inlet pipe 110, a first return pipe 120, and an outer sleeve 150. The first inlet pipe 110 and the first return pipe 120 are arranged side by side inside the outer sleeve 150, thereby making the first transmission unit 100 a whole, which is conducive to the miniaturization and weight reduction of the device.

[0117] The second transmission unit 200 includes a second inlet pipe 210 and a second return pipe 220. A first adapter 230 is provided on the second inlet pipe 210, which is connected to the first inlet pipe 110. The flow direction of the fluid in the first inlet pipe 110 is redirected by the first adapter 230 to flow into the second inlet pipe 210. The second return pipe 220 is sleeved outside the second inlet pipe 210, and a second adapter 240 is provided on the second return pipe 220. The second return pipe 220 is connected to the first return pipe 120 through the second adapter 240, and the flow direction of the fluid in the second return pipe 220 is redirected by the second adapter 240 to return to the first return pipe 120.

[0118] The first adapter 230 and the second adapter 240 are connected by a cooperation.

[0119] The first inlet pipe 110 and the first return pipe 120 can be along... Figure 2 Extending in the X direction as shown, the second inlet pipe 210 and the second return pipe 220 can be along... Figure 2 As shown, the Y-direction extension, i.e., the first inlet tube 110 and the second inlet tube 210 are approximately perpendicular, and the first return tube 120 and the second return tube 220 are approximately perpendicular, reduces the volume of the non-vacuum fluid transfer device and maximizes space utilization. Furthermore, the second inlet tube 210 and the second return tube 220 of the non-vacuum fluid transfer device are redirected relative to the first inlet tube 110 and the first return tube 120. Therefore, when used in conjunction with the ablation needle 300, it facilitates puncture positioning and other operations, and effectively isolates the inlet and return channels, making them independent channels.

[0120] Please continue to refer to this. Figure 2 and combined Figure 3 and Figure 4 The first adapter 230 includes an adapter 231, which is used to establish fluid communication between the first inlet pipe 110 and the second inlet pipe 210, thereby allowing fluid flowing in the first inlet pipe 110 in the X direction to flow into the second inlet pipe 210 and flow in the Y direction. Figure 4As shown, the adapter 231 is provided with a first mating hole 232 and a second mating hole 233 to form fluid communication. The first mating hole 232 extends along a first direction (X direction) to accommodate a first inlet pipe 110; the second mating hole 233 is constructed as a stepped hole extending along a second direction (Y direction) at an angle (e.g., 90° or slightly greater than 90°) to the first direction (X direction), and is used to accommodate a second inlet pipe 210.

[0121] Please combine Figure 3 and Figure 4 The second inlet pipe 210 has a mating end face 211, which abuts against the upper stepped surface 234 in the second mating hole 233, thereby indicating that the second inlet pipe 210 and the adapter 231 are installed in place.

[0122] Adapter 231 has a roughly L-shaped structure, such as Figure 4 As shown, the portion extending along the X direction can be configured to have a second conical outer wall 235 to facilitate processing and reduce weight. The portion extending along the Y direction of the adapter 231 can be configured to include a positioning platform 236 and a first conical outer wall 237 extending on the positioning platform 236, wherein the positioning platform 236 can indicate the adapter 231 to be installed in place with the tee adapter 241 described below, and the first conical outer wall 237 facilitates the insertion of the adapter 231 into the tee adapter 241 and also has a weight-reducing effect.

[0123] Please combine Figure 3 and Figure 5 The second adapter 240 includes a three-way adapter 241, which is used to seal and connect with the adapter 231, and to make the first return pipe 120 and the second return pipe 220 fluidly connected, so that the fluid flowing in the Y direction in the second return pipe 220 can flow back to the first return pipe 120 and flow in the X direction.

[0124] Specifically, the tee adapter 241 is provided with a third mating hole 242 and a fourth mating hole 243. The third mating hole 242 extends in the X direction and is used to accommodate the first return pipe 120. The fourth mating hole 243 is constructed as a stepped hole that passes through the tee adapter 241 in the Y direction. The fourth mating hole 243 is used to accommodate the second return pipe 220, and the through end face 221 of the second return pipe 220 abuts against the lower stepped surface 244 in the fourth mating hole 243, thereby indicating that the second return pipe 220 and the tee adapter 241 are installed in place.

[0125] The third mating hole 242, the fourth mating hole 243, the second mating hole 233, and the first mating hole 232 are in fluid communication.

[0126] As described above, the end (upper end) of the tee adapter 241 abuts against the positioning platform 236 of the adapter 231, thereby indicating that the two are installed in place; at the same time, the fourth mating hole 243 penetrates the tee adapter 241 in the Y direction, and its upper side accommodates the first conical outer wall 237 of the adapter 231, thereby forming a sealed connection between the tee adapter 241 and the adapter 231 on the upper side of the fourth mating hole 243. Therefore, during reflow (please refer to...), Figure 3 and Figure 6 The fluid flows in the channel formed by the inner wall of the second return pipe 220 and the outer wall of the second inlet pipe 210, and flows into the fourth mating hole 243. Due to the sealing effect of the adapter 231 and the three-way adapter 241, the fluid can only flow into the third mating hole 242 and enter the first return pipe 120, and will not enter the first mating hole 232 of the adapter 231.

[0127] Therefore, through the cooperative connection of the three-way adapter 241 and the adapter 231, the first inlet pipe 110 and the first return pipe 120, which are arranged side by side in the first transmission unit 100, can be connected one-to-one with the second inlet pipe 210 and the second return pipe 220, which are nested together in the second transmission unit 200. This allows the inlet and return flows to change direction, thereby reducing the length of the non-vacuum fluid transmission device and making its structure easier to puncture and position.

[0128] Please continue to refer to this. Figure 2 The first transmission unit 100 further includes a heat insulation portion 130 and a flexible reinforcing portion 140. The heat insulation portion 130 is located within the outer sleeve 150 and covers the outer walls of the first inlet pipe 110 and the first return pipe 120. The non-vacuum fluid transmission device of the present invention does not employ vacuum insulation; instead, it uses the heat insulation portion 130 to maintain the first transmission unit 100 at room temperature. More specifically, the heat insulation portion 130 can be a heat insulation material, such as an aerogel material, located within the outer sleeve 150 and covering the outer walls of the first inlet pipe 110 and the first return pipe 120.

[0129] A flexible reinforcing section 140 is disposed between the inner wall of the insulation section 130 and the outer sleeve 150, for supporting the first inlet pipe 110 and the first return pipe 120. Figure 2 As shown, the flexible reinforcement 140 extends spirally along the axial direction of the outer sleeve 150 to provide support throughout the axial direction.

[0130] Please continue to refer to this. Figure 2 The second transmission unit 200 further includes a handle assembly 270 and a first quick-connect device 260. The handle assembly 270 is sealed to the first quick-connect device 260 and the outer sleeve 150, respectively. The handle assembly 270 houses the first adapter 230 and the second adapter 240.

[0131] like Figure 2 As shown, for weight reduction purposes, the handle assembly 270 has a relatively thin wall thickness, resulting in a larger space between its inner wall and the first adapter 230 and the second adapter 240. This space can be filled with aerogel material for stability. The first quick-connect device 260 accommodates the second inlet pipe 210 and the second return pipe 220. The space between the inner wall of the first quick-connect device 260 and the outer wall of the second return pipe 220 can also be filled with aerogel material for stability.

[0132] The first quick-connect device 260 and the second quick-connect device 301 of the ablation needle 300 form a quick-connect structure, thereby facilitating the disassembly and installation of the non-vacuum fluid transfer device and the ablation needle 300.

[0133] like Figure 2 As shown, the outer sleeve 150 can be a flexible hose, and the space between it and the heat insulation part 130 and the flexible reinforcement part 140 can be filled with aerogel material. The space between the handle assembly 270 and the first adapter 230 and the second adapter 240 is also filled with aerogel material. Therefore, the angle between the first transmission unit 100 and the second transmission unit 200 can be slightly increased or decreased; for example, the first transmission unit 100 can be slightly tilted upwards or downwards, thus facilitating adjustment by the operator.

[0134] like Figure 1 As shown, according to a second aspect of the present invention, the present invention provides an ablation needle system, which includes the non-vacuum fluid transport device described above, and further includes an ablation needle 300, the ablation needle 300 being detachably connected to a second transport unit 200.

[0135] like Figure 7 As shown, the ablation needle 300 includes a sealing vacuum jacket 302 and an inlet / outlet assembly 310 that penetrates the sealing vacuum jacket 302 and forms a vacuum connection with it. The ablation needle 300 extends along the Y direction, so when connected to a non-vacuum fluid transfer device, it forms an ablation needle system with a corner structure. The Y-direction portion of the ablation needle system performs the puncture operation, while the X-direction portion is handheld by the operator, making the ablation needle system with a corner structure easier to operate.

[0136] like Figure 8As shown, the inlet / outlet assembly 310 includes an inlet core tube 317 in fluid communication with the second inlet pipe 210 and an inner tube 313 sleeved outside the inlet core tube 317. The inner tube 313 is in fluid communication with the second outlet pipe 220. The cold and hot fluids in the inlet / outlet assembly 310 flow in the inlet core tube 317. To improve operational safety and ensure the treatment temperature of the working fluid, an outer tube 314 is sleeved outside the inner tube 313, with a vacuum space between them.

[0137] To obtain the finest possible ablation needle (e.g., an ultra-fine 1.7mm ablation needle, where 1.7mm refers to the outer diameter of the inlet / outlet assembly 310), thin-walled tubing is generally selected while maintaining therapeutic efficacy, sacrificing some vacuum space. This results in the inner tube 313 experiencing extremely low or high temperatures during treatment due to the flow of cold or hot fluids, while the outer tube 314 remains at room temperature due to the vacuum space. Consequently, the significant temperature difference between the outer tube 314 and the inner tube 313 causes the inner tube 313 to be subjected to stresses from thermal expansion and contraction. Since the inlet / outlet assembly 310 is fixed at both ends by welding, these stresses from thermal expansion and contraction can cause tension or compression on the inner tube 313 and its connecting pipes. This force may cause deformation of the inner tube 313, resulting in stress on the weld seam.

[0138] Therefore, to avoid weld failure due to stress, such as Figure 8 and Figure 9 As shown, at least a portion of the inner tube 313 is provided with a buffer device 316. By providing a buffer device 316 capable of withstanding certain tensile and compressive deformation, stress generated by thermal expansion and contraction can be effectively absorbed.

[0139] Preferably, the buffer device 316 is a bellows, such as a metal bellows or a spiral bellows.

[0140] Both the outer wall of the inner tube 313 and the inner wall of the outer tube 314 are coated with a thin-film getter. Specifically, a very thin film getter can be deposited on the outer wall of the inner tube 313 and the inner wall of the outer tube 314 by vacuum coating. The thin-film getter can be activated during the degassing process of the material in the vacuum chamber. After the degassing is completed, the vacuum sealing operation can be performed.

[0141] Please combine Figure 8 and Figure 10 The ablation needle 300 also includes a needle tip 311 and an energy exchange tube 312, which can be configured as an integral or separate unit. Figure 10 The needle tip 311 and the energy exchange tube 312 are shown to be separate structures, which are sealed together by welding or other methods.

[0142] The energy exchange tube 312 is connected to the outer tube 314 directly or indirectly.Figure 10 The energy exchange tube 312 and the outer tube 314 are connected indirectly, that is, they are connected through the connecting tube 318. After connection, the needle tip 311, the energy exchange tube 312, the connecting tube 318 and the outer tube 314 have the same outer diameter.

[0143] like Figure 10 and Figure 11 As shown, the energy exchange tube 312 includes a heat-insulating cavity 3121 and a heat exchange cavity 3122, which are physically isolated along its axial direction. The heat-insulating cavity 3121 may be filled with a heat-insulating material, such as aerogel material (particles). Furthermore, the inner wall of the heat-insulating cavity 3121 may be coated with a thin-film getter or a room-temperature getter. In other words, by filling the heat-insulating cavity 3121 with heat-insulating material, only the portion of the energy exchange tube 312 containing the heat exchange cavity 3122 can exchange heat, while the portion containing the heat-insulating cavity 3121 will not exchange heat. Therefore, the energy exchange tube 312 can meet specific clinical requirements.

[0144] like Figure 10 As shown, the inlet core tube 317 extends into the heat exchange cavity 3122. Due to the presence of the heat insulation cavity 3121, the axes of the heat exchange cavity 3122 and the inlet core tube 317 are not collinear. Therefore, the inlet core tube 317 needs to be slightly bent to extend into the heat exchange cavity 3122.

[0145] The heat exchange chamber 3122 is in fluid communication with the inlet core tube 317 and the inner tube 313, respectively, so that the fluid flowing out of the inlet core tube 317 is turned back in the heat exchange chamber 3122 and flows back between the inlet core tube 317 and the inner tube 313. The inlet core tube 317 is in fluid communication with the second inlet tube 210 and the first inlet tube 110 mentioned above. That is, the fluid flows from the first inlet tube 110 through the second inlet tube 210 and then enters the inlet core tube 317. The portion of the inlet core tube 317 located in the heat exchange chamber 3122 can perform heat exchange.

[0146] After heat exchange, the fluid turns back in the heat exchange chamber 3122 and flows back to the space between the inlet core tube 317 and the inner tube 313. The inner wall of the inner tube 313 and the outer wall of the inlet core tube 317 form a return flow path. The fluid flows back from this return flow path to the second return pipe 220 and the first return pipe 120 in sequence.

[0147] Optionally, such as Figure 10 As shown, the end of the inlet core tube 317 is an open end, so the fluid in it can flow out from its end to the heat exchange chamber 3122, while the corresponding end in the heat exchange chamber 3122 is a closed end, so the fluid in the heat exchange chamber 3122 can be reversed.

[0148] Optionally, one or more forming holes (not shown) may be provided on the side wall of the inlet core tube 317, and fluid may also flow out from the forming holes into the heat exchange chamber 3122.

[0149] Optionally, the inlet core tube 317 may also be configured with an open end and one or more forming holes (not shown) on its sidewall.

[0150] Please combine Figure 7 , Figure 8 and Figure 12 The ablation needle 300 also includes a conversion sleeve 315 and a second quick-connect device 301 that is sealed to the conversion sleeve 315. For example... Figure 12 As shown, the conversion sleeve 315 includes a sealed chamber 3151 and a guide tube 3152 that penetrates the sealed chamber 3151, with an inlet core tube 317 penetrating the guide tube 3152. The second inlet tube 210 penetrates the second quick-connect device 301 and extends into the sealed chamber 3151 of the conversion sleeve 315.

[0151] The second inlet pipe 210 accommodates a portion of the guide pipe 3152 and thus a portion of the inlet core pipe 317, thereby forming an inlet flow path through fluid communication with the inlet core pipe 317.

[0152] The second inlet pipe 210 and the second return pipe 220 pass through the second quick-connect device 301 and extend into the sealed chamber 3151 of the conversion sleeve 315. More specifically, please refer to... Figure 12 and Figure 16 The inlet core tube 317 passes through the guide tube 3152 and is sealed to the guide tube 3152 at its end. The inlet core tube 317 and the guide tube 3152 extend into the second inlet tube 210 together, so that the inlet core tube 317 and the second inlet tube 210 are in fluid communication. Therefore, the first inlet tube 110, the second inlet tube 210 and the inlet core tube 317 form an inlet flow path for the flow of the fluid to be heat exchanged.

[0153] like Figure 12 and Figure 13 As shown, the end of the conversion sleeve 315 opposite to the sealing chamber 3151 is also provided with a groove 3154 that is in fluid communication with the sealing chamber 3151. Specifically, the groove 3154 is in fluid communication with the sealing chamber 3151 through a drainage hole 3155. Figure 12 As shown, a drainage hole 3155 extending toward the sealing chamber 3151 is provided at the bottom of the groove 3154; the drainage hole 3155 is located in the circumferential direction of the guide tube 3152, and the drainage hole 3155 is in fluid communication with both the groove 3154 and the sealing chamber 3151. Furthermore, in the axial direction (Y-axis direction), the sum of the depth of the groove 3154 and the depth of the drainage hole 3155 is the axial wall thickness of the sealing chamber 3151.

[0154] The inner tube 313 is disposed in the groove 3154, and the end of the inner tube 313 abuts against the inner wall of the groove 3154, that is, the inner tube 313 terminates in the groove 3154. Therefore, the groove 3154, the drainage hole 3155, and the sealing chamber 3151 form a return path. Furthermore, please refer to... Figure 2 , Figure 18 and Figure 21 The first quick-connect device 260 has a wedge-shaped end face 263, which facilitates the insertion of the first quick-connect device 260 into the sealing chamber 3151 of the conversion sleeve 315. A return hole 262 extending axially along the wedge-shaped end face 263 is provided on the wedge-shaped end face 263. When the first quick-connect device 260 is inserted into the sealing chamber 3151 and sealed to it, there is a certain distance between the wedge-shaped end face 263 of the first quick-connect device 260 and the inner bottom wall of the sealing chamber 3151. In other words, the first quick-connect device 260 does not completely occupy the sealing chamber 3151, so the fluid flowing into the sealing chamber 3151 can flow into the return hole 262, i.e., the return hole 262 is in fluid communication with the sealing chamber 3151. Furthermore, the return hole 262 is in fluid communication with the return path formed by the inner wall of the second return pipe 220 and the outer wall of the second inlet pipe 210.

[0155] In other words, when the end of the inner tube 313 abuts against the inner wall of the groove 3154, a return path is formed between the inner wall of the inner tube 313 and the outer wall of the inlet core tube 317, forming the first return path; the return path formed by the groove 3154, the drain hole 3155, and the sealing chamber 3151 forms the second return path; the return hole 262, the inner wall of the second return pipe 220, and the outer wall of the second inlet pipe 210 form the third return path, thus forming the first return pipe 120. The above four return paths are fluidly connected, thereby forming a return flow path. This return flow path is used to flow the fluid after heat exchange, and the fluid can return to the end of the first return pipe 120 according to the above return flow path for further processing, such as recovery or discharge.

[0156] Please combine Figure 12 and Figure 16The axial distance A (i.e., the length in the Y direction) between the inner wall of the sealing chamber 3151 and the seal 306 in the second quick-connect device 301 is related to the low-temperature resistance of the seal 306. More specifically, the axial distance A (i.e., the length in the Y direction) between the inner wall of the sealing chamber 3151 and the seal 306 in the second quick-connect device 301 is negatively correlated with the low-temperature resistance of the seal 306. For example, the higher the low-temperature resistance of the seal 306, the smaller the distance A. Therefore, if the seal 306 is made of a material with better low-temperature resistance, such as PTFE (polytetrafluoroethylene), the distance A can be relatively shortened; if the seal 306 is made of ordinary rubber material, the distance A can be relatively increased to meet the requirements of sealing reliability.

[0157] In addition, the seal 306 can also be made of materials such as nitrile rubber, fluororubber, silicone rubber or polyurethane, and the aforementioned distance A can be adjusted according to the characteristics of these different materials.

[0158] The seal 306 is used to form a seal between the second quick-connect device 301 and the first quick-connect device 260 of the non-vacuum fluid transfer device. Therefore, an alternative to having the seal 306 located on the inner wall of the second quick-connect device 301 is to have the seal 306 located on the outer wall of the first quick-connect device 260, which can also ensure the sealing performance of both.

[0159] Please continue to refer to this. Figure 7 and combined Figure 14 , Figure 15 and Figure 16 The ablation needle 300 also includes a sealing vacuum jacket 302. For weight reduction, the sealing vacuum jacket 302 has a first cavity 3021 and a second cavity 3022 on both sides. A reflux inlet and sealing hole 3024 is provided in the center of the partition between the first cavity 3021 and the second cavity 3022. The reflux inlet assembly 310 passes through this reflux inlet and sealing hole 3024. Part of the space in the reflux inlet and sealing hole 3024 is occupied by the reflux inlet assembly 310, while the other part can be used for sealing during vacuuming operations. In other words, the reflux inlet and sealing hole 3024 serves both to accommodate the reflux inlet assembly 310 and as a sealing interface for vacuuming operations.

[0160] In addition to sealing through the inlet / outlet and sealing hole 3024, at least four sealing ports 3023 are distributed circumferentially along the inlet / outlet and sealing hole 3024 on the partition plate. Vacuuming operation can be performed on the ablation needle 300 through the sealing ports 3023, thereby ensuring the required vacuum environment inside the ablation needle 300.

[0161] like Figure 9 , Figure 14 and Figure 16As shown, the outer tube 314 terminates in the second cavity 3022, and a getter 305 is provided at the termination of the outer tube 314 in the second cavity 3022 to maintain the vacuum environment in the first cavity 3021. Preferably, the getter 305 is a room-temperature getter, such as PdO+ molecular sieve, activated carbon, or heat insulation material, which does not require high-temperature activation and only needs to be degassed, thus the process is simple and easy to operate.

[0162] like Figure 12 , Figure 14 and Figure 16 As shown, a protective sleeve 303 is sealed to one side of the sealing vacuum jacket 302. Specifically, a mating platform 3025 is provided on the outer wall of the first cavity 3021. After it is positioned with the mating groove 3031 on the protective sleeve 303, the sealing vacuum jacket 302 and the protective sleeve 303 can be sealed together, for example, by welding. The other side of the protective sleeve 303 is tightly fitted with the inlet / outlet assembly 310 (specifically, the outer tube 314). The inlet / outlet assembly 310 passes through the protective sleeve 303 and the sealing vacuum jacket 302 in sequence, and performs vacuuming and sealing operations through the above-mentioned sealing interfaces to ensure the required vacuum environment inside the ablation needle 300.

[0163] The protective sleeve 303 can provide some protection for the inlet and outlet components 310 (specifically, the outer tube 314). In addition, the protective sleeve 303 has an overall conical structure, which is both aesthetically pleasing and lightweight.

[0164] The other side of the sealing vacuum jacket 302 is sealed to the conversion sleeve 315. Specifically, the outer wall of the conversion sleeve 315 is provided with a connecting boss 3153 (e.g., Figure 12 As shown), the side end of the sealing vacuum jacket 302 abuts against one side of the connecting boss 3153, and the other side of the second quick-connect device 301 abuts against the other side of the connecting boss 3153 to ensure proper installation, thereby enabling a sealed connection between the sealing vacuum jacket 302, the conversion sleeve 315, and the second quick-connect device 301. Figure 10 As shown, the sealing vacuum jacket 302, the conversion sleeve 315 and the second quick connection device 301 have the same outer diameter after being sealed together.

[0165] The second quick-connect device 301 and the first quick-connect device 260 are connected by a snap-fit ​​mechanism, enabling quick assembly and disassembly.

[0166] In one implementation, such as Figure 1 , Figure 2 , Figure 16 , Figure 17 , Figure 19 and Figure 20 In the embodiment shown, the second quick-connect device 301 and the first quick-connect device 260 are connected by a sliding engagement.

[0167] Optionally, please combine Figure 1 and Figure 16 The second quick connection device 301 includes a first flange 3011. In order to facilitate the placement of the seal 306, the diameter of the first flange 3011 is slightly larger than the diameter of the sealing vacuum jacket 302.

[0168] Optionally, please combine Figure 1 and Figure 17 The second quick connection device 301 includes a second flange 3013 with a diameter approximately the same as that of the sealing vacuum jacket 302. In other words, the second quick connection device 301 has the same outer diameter as the sealing vacuum jacket 302 and the conversion sleeve 315, thereby keeping the ablation needle 300 in a consistent overall shape.

[0169] Therefore, it is further understood that the second quick-connect device 301 also includes an elastic movable sleeve 304 for achieving quick connection, and the wall thickness of the elastic movable sleeve 304 can also be set to be thinner, such as... Figure 17 The wall thickness of the elastic movable sleeve 304 shown is significantly smaller than that of the elastic movable sleeve 304. Figure 16 The wall thickness of the elastic movable sleeve 304 shown is designed to ensure that the overall dimensions of the ablation needle 300 are consistent.

[0170] Please combine Figure 1 , Figure 2 , Figure 16 , Figure 19 , Figure 20 and Figure 21 The elastic movable sleeve 304 is sleeved on the first flange 3011 (or Figure 17 The second flange 3013 (shown) is located outside the first flange 3011, forming a space between them to accommodate the elastic element 3041. One end of the elastic element 3041 abuts against the protruding end of the first flange 3011, and the other end abuts against the top block 3042 of the elastic movable sleeve 304. Therefore, when the elastic movable sleeve 304 moves in the negative Y-axis direction, the elastic element 3041 is compressed (at which time the second quick-connect device 301 can be unlocked from the first quick-connect device 260), and conversely, the elastic movable sleeve 304 moves in the positive Y-axis direction under the restoring force of the elastic element 3041 (at which time the second quick-connect device 301 can be locked from the first quick-connect device 260).

[0171] The first flange 3011 is provided with a ball bearing hole 3014, which is constructed as a tapered hole with a gradually decreasing diameter along the direction from the outer wall to the inner wall of the first flange 3011. A ball bearing 3012 (e.g., ...) is disposed in the ball bearing hole 3014. Figure 19(As shown). The ball 3012 is in the ball hole 3014, and the top block 3042 of the elastic movable sleeve 304 is disposed at a position corresponding to the ball hole 3014, so that a portion of the ball 3012 protrudes from the inside of the ball hole 3014 (as shown). Figure 20 (As shown). Since the ball bore 3014 is a tapered bore, the ball 3012 can roll freely in the ball bore 3014 without coming out.

[0172] The outer wall of the first quick-connect device 260 is provided with a mating groove 261 (please refer to...). Figure 2 and Figure 21 The mating groove 261 has an inclined wall 2611 (e.g., Figure 21 As shown in the diagram, this results in the mating groove 261 having a structure that is larger on the outside and smaller on the inside. When the second quick-connect device 301 is connected to the first quick-connect device 260, the portion of the ball 3012 that protrudes from the ball hole 3014 enters the mating groove 261. In other words, the ball 3012 is stuck in the ball hole 3014 and the mating groove 261.

[0173] Furthermore, when the elastic movable sleeve 304 moves along the negative Y-axis, the top block 3042 of the elastic movable sleeve 304 is misaligned with the ball bearing hole 3014, so that the ball bearing 3012 can be pushed into the ball bearing hole 3014 by the inclined wall 2611 of the mating groove 261. Then, the second quick-connect device 301 and the first quick-connect device 260 are unlocked, and the two can be separated. Since the second quick-connect device 301 and the first quick-connect device 260 are unlocked, the non-vacuum fluid transfer device can be unlocked from the ablation needle 300.

[0174] Conversely, when the elastic movable sleeve 304 moves along the positive Y-axis under the restoring force of the elastic element 3041, the top block 3042 of the elastic movable sleeve 304 corresponds to the ball hole 3014, causing the ball 3012 to protrude from the inside of the ball hole 3014 and enter the mating groove 261, thereby locking the second quick-connect device 301 with the first quick-connect device 260. Therefore, the non-vacuum fluid transmission device can be locked with the ablation needle 300. This allows the second quick-connect device 301 and the first quick-connect device 260 to be quickly assembled.

[0175] Understandably, multiple ball bearings 3012 can be arranged circumferentially along the first flange 3011. For example... Figure 19 and Figure 20 As shown, four balls 3012 are arranged at equal intervals along the circumference of the first flange 3011.

[0176] In another implementation, such as Figure 22 , Figure 23 , Figure 24 and Figure 25As shown, the second quick-connect device 301 and the first quick-connect device 260 are connected by a sliding elastic engagement. In this embodiment, the connection method between the second quick-connect device 301 and the first quick-connect device 260 will be mainly described; other components can be referred to in other embodiments described herein.

[0177] like Figure 22 and Figure 23 As shown, the second quick-connect device 301 includes a connecting sleeve 308 and an elastic engaging element 307 disposed on the connecting sleeve 308. For example... Figure 24 As shown, the connecting sleeve 308 is provided with a connecting hole 3081, and the elastic engaging element 307 is disposed in the connecting hole 3081, such as... Figure 24 and Figure 25 As shown, the elastic engaging element 307 includes a plunger 3073, a spring 3072, and a top ball 3071. The plunger 3073 can be fixedly connected to the connecting hole 3081 by means of a threaded connection.

[0178] The plunger 3073 has a tapered bore, and the ejector ball 3071 and spring 3072 are disposed within the tapered bore. Under the pushing force of the spring 3072, a portion of the ejector ball 3071 protrudes outside the tapered bore of the plunger 3073. Because the inner diameter of the tapered bore is small, the ejector ball 3071 can rotate freely within it without dislodging.

[0179] The first quick-connect device 260 is similar to the aforementioned embodiment, and it is provided with a mating groove 261. After the second quick-connect device 301 is connected to the first quick-connect device 260, the part of the top ball 3071 exposed outside the conical hole of the plunger 3073 is inserted into the mating groove 261, that is, the top ball 3071 is stuck in the plunger 3073 and the mating groove 261.

[0180] When the first quick-connect device 260 is pulled along the positive Y-axis, the mating groove 261 and the top ball 3071 are misaligned. The top ball 3071 is pushed by the inclined wall 2611 of the mating groove 261, thereby compressing the spring 3072. The top ball 3071 then retracts into the conical hole of the plunger 3073, thereby unlocking the second quick-connect device 301 from the first quick-connect device 260, allowing the non-vacuum fluid transmission device to be separated from the ablation needle 300.

[0181] Conversely, when the first quick-connect device 260 is pushed in the negative Y-axis direction to insert it into the second quick-connect device 301, the mating groove 261 corresponds to the top ball 3071. Under the push of the spring 3072, the top ball 3071 passes through the tapered hole of the plunger 3073 and is locked into the mating groove 261, thereby locking the second quick-connect device 301 and the first quick-connect device 260, which can connect the non-vacuum fluid transmission device to the ablation needle 300.

[0182] In addition, such asFigure 24 As shown, the connecting sleeve 308 is also provided with a sealing groove 3082, which is used to accommodate the sealing element 306, thereby forming a seal between the second quick connecting device 301 and the first quick connecting device 260.

[0183] The connecting sleeve 308 is also provided with a recess 3083, which makes it easier to grip during operation.

[0184] exist Figure 22 , Figure 23 , Figure 24 and Figure 25 Based on this, another engagement method between the second quick-connect device 301 and the first quick-connect device 260 can be conceived, namely, an elastic engagement connection. For example, a push-button switch can be constructed on the elastic engagement element 307. When force is applied to the push-button switch, the elastic engagement element 307 is disengaged from the mating groove 261, thereby unlocking the second quick-connect device 301 and the first quick-connect device 260.

[0185] The ablation needle 300 comes in various diameters, and the assembly resistance varies depending on the diameter of the ablation needle 300 and the non-vacuum fluid transfer device. Generally, a larger diameter ablation needle 300 has lower assembly resistance because the flow pipe diameter for both cold and hot fluids is larger; conversely, a smaller diameter ablation needle 300 has higher assembly resistance because the flow pipe diameter for both cold and hot fluids is smaller. To ensure that the non-vacuum fluid transfer device can accommodate ablation needles 300 of different diameters, the fitting clearance of the airtight seal between the ablation needle 300 and the second transfer unit 200 of the non-vacuum fluid transfer device can be adjusted to guarantee the cooling rate and performance.

[0186] Since the flow resistance is consistent for ablation needles 300 of the same diameter, adjustments are made for ablation needles 300 of different diameters.

[0187] Please combine Figure 1 , Figure 12 and Figure 17 When the non-vacuum fluid transfer device is used with the ablation needle 300, the resistance of different ablation needles is matched through the fitting gap. The distance L between the end of the inlet core tube 317 and the inner wall of the sealed chamber 3151 of the conversion sleeve 315 is a fixed value, such as... Figure 12 and Figure 17 As shown. The depth to which the inlet core tube 317 (and guide tube 3152) extends into the second inlet tube 210 (or can be considered as the depth to which it extends into the second return tube 220) is the mating length L1.

[0188] The flow resistance between the inlet core tube 317 (and guide tube 3152) and the second inlet tube 210 is related to the aforementioned fit length L1 and the fit clearance between the inlet core tube 317 (and guide tube 3152) and the second inlet tube 210. Generally, the fit resistance is required to be greater than the resistance at the tip of the ablation needle 300 to prevent cold and hot fluids from directly flowing back through the fit clearance to the second return tube 220 of the non-vacuum fluid transfer device, instead of through the return path of the ablation needle 300. For example, this could be a larger fit length L1 and a larger fit clearance, or a shorter fit length L1 and a smaller fit clearance.

[0189] Please combine Figure 1 , Figure 3 and Figure 18 The inner diameter of the non-vacuum fluid transfer device is C1, which is the inner diameter of the second inlet pipe 210 (e.g., Figure 3 and Figure 17 As shown), this is a fixed value. The inner diameter of the ablation needle 300 is C, which is the outer diameter of the guide tube 3152 (as shown). Figure 12 and Figure 17 (As shown). Different fitting requirements can be met by adjusting the value of C. For example, a relatively small gap can be selected for a smaller diameter ablation needle 300, and a relatively large gap can be selected for a larger diameter ablation needle 300.

[0190] Furthermore, by selecting an appropriate fitting gap, the initially vaporized fluid can flow directly out through the fitting gap, which facilitates the rapid arrival of the fluid (liquid nitrogen) at the tip of the ablation needle 300, thereby increasing the cooling rate. Moreover, the vaporized fluid flowing out from the fitting gap can exit through the second return pipe 220 of the non-vacuum fluid transfer device, thus pre-cooling the second return pipe 220 and reducing subsequent return resistance, further improving the cooling rate.

[0191] According to a third aspect of the invention, the invention provides a fluid channel, and more specifically, relates to a fluid channel in the ablation needle system described above.

[0192] The fluid channel of the present invention includes an inlet flow path and a return flow path; wherein, the inlet flow path includes a first inlet path and a second inlet path, and the flow direction of the fluid in the first inlet path is redirected to flow into the second inlet path; the return flow path includes a third return path 33 and a fourth return path 34, and the flow direction of the fluid in the third return path 33 is redirected to flow into the fourth return path 34; wherein, the flow direction of the fluid in the first inlet path and the flow direction of the fluid in the fourth return path 34 are opposite, and the flow direction of the fluid in the second inlet path and the flow direction of the fluid in the third return path 33 are opposite.

[0193] In one embodiment, the flow path further includes a third flow path, wherein the first flow path, the second flow path and the third flow path are defined by the first transmission unit 100, the second transmission unit 200, the ablation needle 300, the first adapter 230 and the second adapter 240 described above.

[0194] Specifically, the first transmission unit 100 includes a first inlet tube 110, the second transmission unit 200 includes a second inlet tube 210, and the ablation needle 300 includes an inlet core tube 317. The inlet path includes a first inlet path, a second inlet path, and a third inlet path.

[0195] The first flow path is defined by the first flow tube 110 of the first transmission unit 100 (the inner cavity / inner wall of the first flow tube 110), the second flow path is defined by the second flow tube 210 of the second transmission unit 200 (the inner cavity / inner wall of the second flow tube 210), and the third flow path is defined by the flow core tube 317 of the ablation needle 300 (the inner cavity / inner wall of the flow core tube 317).

[0196] The axes of the first inlet pipe 110 and the second inlet pipe 210 are approximately perpendicular, and the first inlet pipe 110 is in fluid communication with the second inlet pipe 210 through the first adapter 230.

[0197] Please refer to Figure 2 and combined Figure 3 and Figure 4 The first adapter 230 includes an adapter 231, which is used to establish fluid communication between the first inlet pipe 110 and the second inlet pipe 210, thereby allowing fluid flowing in the first inlet pipe 110 in the X direction to flow into the second inlet pipe 210 and flow in the Y direction. Figure 4 As shown, the adapter 231 is provided with a first mating hole 232 and a second mating hole 233 to form fluid communication. The first mating hole 232 extends along a first direction (X direction) to accommodate a first inlet pipe 110; the second mating hole 233 is constructed as a stepped hole extending along a second direction (Y direction) at an angle (e.g., 90°) to the first direction (X direction) and is used to accommodate a second inlet pipe 210.

[0198] The first mating hole 232 and the second mating hole 233 are in fluid communication, thereby forming a fluid connection between the first inlet pipe 110 and the second inlet pipe 210.

[0199] The second inlet pipe 210 is in fluid communication with the inlet core pipe 317. Specifically, it can be combined with... Figure 8 , Figure 12 , Figure 13 and Figure 18The ablation needle 300 also includes a conversion sleeve 315 and a second quick-connect device 301 that is sealed to the conversion sleeve 315. For example... Figure 12 As shown, the conversion sleeve 315 includes a sealed chamber 3151 and a guide tube 3152 that penetrates the sealed chamber 3151, with an inlet core tube 317 penetrating the guide tube 3152. The second inlet tube 210 penetrates the second quick-connect device 301 and extends into the sealed chamber 3151 of the conversion sleeve 315.

[0200] The second inlet pipe 210 accommodates a portion of the guide pipe 3152 and thus a portion of the inlet core pipe 317, thereby being in fluid communication with the inlet core pipe 317.

[0201] The second inlet pipe 210 and the second return pipe 220 pass through the second quick-connect device 301 and extend into the sealed chamber 3151 of the conversion sleeve 315. More specifically, please refer to... Figure 12 and Figure 16 The inlet core tube 317 passes through the guide tube 3152 and is sealed to the guide tube 3152 at its end. The inlet core tube 317 and the guide tube 3152 extend together into the second inlet tube 210, thereby enabling fluid communication between the inlet core tube 317 and the second inlet tube 210. Therefore, the first inlet tube 110, the second inlet tube 210, and the inlet core tube 317 form an inlet path for the flow of the fluid to be heat exchanged, allowing the fluid to flow along... Figure 1 The flow proceeds from the negative X-axis direction to the negative Y-axis direction until it reaches the tip 311 of the ablation needle 300.

[0202] Furthermore, the return path also includes a first return path 31 and a second return path 32. The first return path 31, the second return path 32, the third return path 33, and the fourth return path 34 are defined by the first transmission unit 100, the second transmission unit 200, the ablation needle 300, the first adapter 230, and the second adapter 240 described above.

[0203] The ablation needle 300 also includes an inlet / outlet assembly 310, which includes an inlet core tube 317 in fluid communication with the second inlet tube 210 and an inner tube 313 sleeved outside the inlet core tube 317. The inner tube 313 is in fluid communication with the second outlet tube 220. To improve operational safety and ensure the treatment temperature of the working fluid, an outer tube 314 is sleeved outside the inner tube 313, with a vacuum space between them.

[0204] The first reflux path 31 is defined by the inner wall of the inner tube 313 and the outer wall of the inlet core tube 317 (see [link]). Figure 8 , Figure 9 and Figure 10 ).

[0205] like Figure 12 andFigure 13 As shown, the end of the conversion sleeve 315 opposite to the sealing chamber 3151 is also provided with a groove 3154 that is in fluid communication with the sealing chamber 3151. Specifically, the groove 3154 is in fluid communication with the sealing chamber 3151 through a drainage hole 3155. Figure 12 As shown, a drainage hole 3155 extending toward the sealing chamber 3151 is provided at the bottom of the groove 3154; the drainage hole 3155 is located in the circumferential direction of the guide tube 3152, and the drainage hole 3155 is in fluid communication with both the groove 3154 and the sealing chamber 3151. Furthermore, in the axial direction (Y-axis direction), the sum of the depth of the groove 3154 and the depth of the drainage hole 3155 is the axial wall thickness of the sealing chamber 3151.

[0206] The inner tube 313 is disposed in the groove 3154, and the end of the inner tube 313 abuts against the inner wall of the groove 3154, that is, the inner tube 313 terminates in the groove 3154. Therefore, the groove 3154, the drainage hole 3155, and the sealed chamber 3151 form the second return path 32. Please refer to... Figure 12 and Figure 13 The inner tube 313 extends into the groove 3154, and the end of the inner tube 313 abuts against the inner wall of the groove 3154. At the same time, the inlet core tube 317 extends into the guide tube 3152. Thus, the first section of the return path 31, defined by the inner wall of the inner tube 313 and the outer wall of the inlet core tube 317, is in fluid communication with the drainage hole 3155, that is, the first section of the return path 31 is in fluid communication with the second section of the return path 32.

[0207] The second transmission unit 200 also includes a first quick-connect device 260, and the second quick-connect device 301 of the ablation needle 300 forms a quick-plug structure. The first quick-connect device 260 has a wedge-shaped end face 263 (see reference). Figure 2 , Figure 18 and Figure 21 The wedge-shaped end face 263 is provided with a return hole 262 extending axially along the first quick connection device 260. The third return path 33 is defined by the return hole 262, the inner wall of the second return pipe 220, and the outer wall of the second inlet pipe 210 (see [link]). Figure 26 ).

[0208] Please combine Figure 18 and Figure 26 The first quick-connect device 260 is inserted into the sealed chamber 3151 of the conversion sleeve 315 to be sealed and connected to the sealed chamber 3151. The return hole 262 at the end of the first quick-connect device 260 is in fluid communication with the sealed chamber 3151, that is, the second return path 32 and the third return path 33 are in fluid communication.

[0209] The fourth return path 34 is defined by the first return pipe 120 (e.g.) Figure 2As shown, the first return pipe 120 is connected to the second return pipe 220 through the second adapter 240. The flow direction of the fluid in the second return pipe 220 is changed through the second adapter 240 to return to the first return pipe 120.

[0210] Please combine Figure 3 and Figure 5 The second adapter 240 includes a three-way adapter 241, which is used to seal and connect with the adapter 231, and to make the first return pipe 120 and the second return pipe 220 fluidly connected, so that the fluid flowing in the Y direction in the second return pipe 220 can flow back to the first return pipe 120 and flow in the X direction.

[0211] Specifically, the tee adapter 241 is provided with a third mating hole 242 and a fourth mating hole 243. The third mating hole 242 extends in the X direction and is used to accommodate the first return pipe 120. The fourth mating hole 243 is constructed as a stepped hole that passes through the tee adapter 241 in the Y direction. The fourth mating hole 243 is used to accommodate the second return pipe 220, and the through end face 221 of the second return pipe 220 abuts against the lower stepped surface 244 in the fourth mating hole 243, thereby indicating that the second return pipe 220 and the tee adapter 241 are installed in place.

[0212] The third mating hole 242, the fourth mating hole 243, the second mating hole 233 and the first mating hole 232 are fluidly connected, thereby making the fourth return path 34 defined by the second return pipe 220 and the first return pipe 120 fluidly connected, that is, the third return path 33 and the fourth return path 34 are fluidly connected.

[0213] As described above, the end (upper end) of the tee adapter 241 abuts against the positioning platform 236 of the adapter 231, thereby indicating that the two are installed in place; at the same time, the fourth mating hole 243 penetrates the tee adapter 241 in the Y direction, and its upper side accommodates the first conical outer wall 237 of the adapter 231, thereby forming a sealed connection between the tee adapter 241 and the adapter 231 on the upper side of the fourth mating hole 243. Therefore, during reflow (please refer to...), Figure 3 and Figure 6 The fluid flows in the channel formed by the inner wall of the second return pipe 220 and the outer wall of the second inlet pipe 210, and flows into the fourth mating hole 243. Due to the sealing effect of the adapter 231 and the three-way adapter 241, the fluid can only flow into the third mating hole 242 and enter the first return pipe 120, and will not enter the first mating hole 232 of the adapter 231.

[0214] Therefore, through the cooperative connection of the three-way adapter 241 and the adapter 231, the first inlet pipe 110 and the first return pipe 120, which are arranged side by side in the first transmission unit 100, can be connected one-to-one with the second inlet pipe 210 and the second return pipe 220, which are nested together in the second transmission unit 200. This allows the inlet and return flows to change direction, thereby reducing the length of the non-vacuum fluid transmission device and making its structure easier to puncture and position.

[0215] The fluid channel of this invention is based on the non-vacuum transport device and ablation needle system described in this invention. Therefore, the fluid channel of this invention does not describe the specific forms of the various components involved in detail. The fluid channel of this invention can be combined with various components and their connection methods in the non-vacuum transport device and / or ablation needle system described in any one or more embodiments / examples above without any obstacles.

[0216] It should be noted that the arrows shown in the accompanying drawings of this invention indicate the direction of fluid flow. Furthermore, elongated elements (such as the first transmission unit, the second transmission unit, and the ablation needle) are illustrated in a broken drawing style in the accompanying drawings of this invention. Therefore, those skilled in the art should be able to understand and without doubt obtain the overall structural form of the non-vacuum fluid transmission device, fluid channel, and ablation needle system claimed in this invention based on the accompanying drawings.

[0217] Although the invention has been described with reference to preferred embodiments, various modifications can be made 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 as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An ablation needle system, characterized in that, include: A non-vacuum fluid transfer device comprising a first transfer unit (100) and a second transfer unit (200) connected to each other, the second transfer unit (200) including a second inlet pipe (210), a second return pipe (220), and a first quick-connect device (260); and The ablation needle (300) is detachably connected to the second transmission unit (200). The ablation needle (300) includes a sealing vacuum jacket (302) and an inlet / outlet assembly (310) that penetrates the sealing vacuum jacket (302) and forms a vacuum connection with it. The inlet and outlet assembly (310) includes an inlet core tube (317) that is in fluid communication with the second inlet pipe (210) to form an inlet path, and an inner tube (313) sleeved on the outside of the inlet core tube (317). The inner tube (313) is in fluid communication with the second outlet pipe (220). A first outlet path (31) is formed between the inner wall of the inner tube (313) and the outer wall of the inlet core tube (317). At least a portion of the inner tube (313) is provided with a buffer device (316). The ablation needle (300) also includes a conversion sleeve (315); The conversion sleeve (315) includes: A sealed chamber (3151), the second inlet pipe (210) and the second return pipe (220) extend into the sealed chamber (3151); A guide tube (3152) penetrating the sealed chamber (3151), and the inlet core tube (317) penetrating the guide tube (3152); and A drainage hole (3155) is provided circumferentially around the guide tube (3152), and the drainage hole (3155) is in fluid communication with the sealed chamber (3151); One end of the conversion sleeve (315) is also provided with a groove (3154), the inner tube (313) is located in the groove (3154), the end of the inner tube (313) abuts against the inner wall of the groove (3154), and the groove (3154), the drainage hole (3155) and the sealing chamber (3151) form a second reflux path (32). The first quick-connect device (260) has a reflux hole (262) extending axially along the first quick-connect device (260) on its wedge-shaped end face (263). The reflux hole (262) is in fluid communication with the sealed chamber (3151). The reflux hole (262), the inner wall of the second reflux pipe (220), and the outer wall of the second inlet pipe (210) form a third reflux path (33). The first return path (31), the second return path (32) and the third return path (33) are fluidly connected.

2. The ablation needle system according to claim 1, characterized in that, An outer tube (314) is fitted around the inner tube (313), and there is a vacuum space between the inner tube (313) and the outer tube (314). The outer wall of the inner tube (313) and the inner wall of the outer tube (314) are both coated with a thin-film getter.

3. The ablation needle system according to claim 2, characterized in that, The ablation needle (300) also includes an integral or separate needle tip (311) and an energy exchange tube (312), the energy exchange tube (312) being directly or indirectly connected to the outer tube (314).

4. The ablation needle system according to claim 3, characterized in that, The energy exchange tube (312) includes a heat insulation cavity (3121) and a heat exchange cavity (3122) that are physically isolated along its axial direction, and the inlet core tube (317) extends into the heat exchange cavity (3122); The heat exchange chamber (3122) is in fluid communication with the inlet core tube (317) and the inner tube (313), respectively, so that the fluid flowing out of the inlet core tube (317) is turned back in the heat exchange chamber (3122) and flows back to the inlet core tube (317) and the inner tube (313).

5. The ablation needle system according to claim 4, characterized in that, The axes of the heat exchange cavity (3122) and the inlet core tube (317) are not collinear, so that the inlet core tube (317) bends and extends into the heat exchange cavity (3122), and the part of the inlet core tube (317) located in the heat exchange cavity (3122) can perform heat exchange.

6. The ablation needle system according to claim 5, characterized in that, The end of the inlet core tube (317) is an open end, and / or One or more forming holes are provided on the side wall of the inlet core tube (317); The fluid in the inlet core tube (317) flows out from the end of the inlet core tube (317) or the forming hole to the heat exchange chamber (3122). The end of the heat exchange cavity (3122) corresponding to the inlet core tube (317) is a closed end, and the fluid in the heat exchange cavity (3122) can be reversed therein.

7. The ablation needle system according to any one of claims 1-6, characterized in that, The ablation needle (300) also includes a second quick-connect device (301) that is sealed to the conversion sleeve (315). The second inlet pipe (210) and the second return pipe (220) pass through the second quick connection device (301).

8. The ablation needle system according to claim 7, characterized in that, The axial distance between the inner wall of the sealed chamber (3151) and the seal (306) in the second quick connection device (301) is related to the low temperature resistance of the seal (306); The seal (306) is used to form a seal between the second quick-connect device (301) and the first quick-connect device (260) of the non-vacuum fluid transfer device.

9. The ablation needle system according to claim 7, characterized in that, The ablation needle (300) also includes a sealing vacuum jacket (302); The sealing vacuum jacket (302) is sealed with a protective sleeve (303) on one side, and the other side of the protective sleeve (303) is tightly fitted with the outer tube (314) of the inlet and outlet assembly (310); The other side of the sealing vacuum jacket (302) is sealed to the conversion sleeve (315).

10. The ablation needle system according to claim 9, characterized in that, The sealing vacuum jacket (302) has a first cavity (3021) and a second cavity (3022) on its two sides respectively. The outer wall of the first cavity (3021) is provided with a mating platform (3025). The mating platform (3025) and the mating groove (3031) on the protective sleeve (303) are positioned to connect the sealing vacuum jacket (302) and the protective sleeve (303).

11. The ablation needle system according to claim 9, characterized in that, The outer wall of the conversion sleeve (315) is provided with a connecting boss (3153), and the side end of the sealing vacuum jacket (302) abuts against one side of the connecting boss (3153). The other side of the second quick-connect device (301) abuts against the other side of the connecting boss (3153), thereby sealing the sealing vacuum jacket (302), the conversion sleeve (315) and the second quick-connect device (301).

12. The ablation needle system according to claim 10, characterized in that, A flow inlet / outlet and sealing hole (3024) is provided in the center of the partition between the first cavity (3021) and the second cavity (3022), and the flow inlet / outlet assembly (310) passes through the flow inlet / outlet and sealing hole (3024).

13. The ablation needle system according to claim 12, characterized in that, The sealing vacuum jacket (302) is also provided with at least four sealing ports (3023) distributed circumferentially along the inlet / outlet and sealing holes (3024).

14. The ablation needle system according to claim 8, characterized in that, The second quick-connect device (301) is connected to the first quick-connect device (260) by a sliding engagement. The second quick-connect device (301) includes: First flange (3011), used to house the seal (306); or The second flange (3013) has the same diameter as the sealing vacuum jacket (302); An elastic movable sleeve (304) is fitted over the outside of the first flange (3011) or the second flange (3013) to form a space for accommodating the elastic element (3041); One end of the elastic element (3041) abuts against the protruding end of the first flange (3011) or the second flange (3013), and the other end of the elastic element (3041) abuts against the top block (3042) of the elastic movable sleeve (304). When the elastic movable sleeve (304) moves along the negative Y-axis, it compresses the elastic element (3041), thereby unlocking the second quick-connect device (301) from the first quick-connect device (260). Under the restoring force of the elastic element (3041), the elastic movable sleeve (304) moves along the positive Y-axis, thereby locking the second quick-connect device (301) from the first quick-connect device (260).

15. The ablation needle system according to claim 14, characterized in that, The first flange (3011) is provided with a ball hole (3014), which is constructed as a tapered hole with a gradually decreasing diameter along the direction from the outer wall to the inner wall of the first flange (3011). A ball (3012) is provided in the ball hole (3014), and the top block (3042) is provided at a position corresponding to the ball hole (3014); The first quick-connect device (260) has a mating groove (261) on its outer wall, and the mating groove (261) has an inclined wall (2611). The outer wall of the first quick-connect device (260) is provided with a mating groove (261). When the elastic moving sleeve (304) moves along the negative Y-axis, the top block (3042) and the ball hole (3014) are offset from each other, so that the ball (3012) can be pushed into the ball hole (3014) by the inclined wall (2611), thereby unlocking the second quick-connect device (301) from the first quick-connect device (260). When the elastic movable sleeve (304) moves along the positive Y-axis, the top block (3042) corresponds to the ball hole (3014), so that the ball (3012) is exposed from the inside of the ball hole (3014) and enters the mating groove (261), thereby locking the second quick connection device (301) with the first quick connection device (260).

16. The ablation needle system according to claim 8, characterized in that, The second quick-connect device (301) and the first quick-connect device (260) are connected by a sliding elastic engagement. The second quick-connect device (301) includes a connecting sleeve (308) and an elastic engaging element (307) disposed on the connecting sleeve (308). The connecting sleeve (308) is provided with a connecting hole (3081), and the elastic engaging element (307) is disposed in the connecting hole (3081). The elastic engaging element (307) includes a plunger (3073), a spring (3072), and a top ball (3071). The plunger (3073) is provided with a conical hole, and the top ball (3071) and the spring (3072) are disposed in the conical hole; The first quick-connect device (260) has a mating groove (261) on its outer wall, and the mating groove (261) has an inclined wall (2611). When the first quick-connect device (260) is pulled along the positive Y-axis, the mating groove (261) and the top ball (3071) are misaligned. The top ball (3071) is pushed by the inclined wall (2611), thereby compressing the spring (3072) and causing the top ball (3071) to retract into the tapered hole of the plunger (3073), thereby unlocking the second quick-connect device (301) from the first quick-connect device (260). When the first quick-connect device (260) is pushed along the negative Y-axis, the first quick-connect device (260) is inserted into the second quick-connect device (301). The mating groove (261) corresponds to the top ball (3071). Under the push of the spring (3072), the top ball (3071) is inserted into the mating groove (261) through the tapered hole of the plunger (3073), thereby locking the second quick-connect device (301) with the first quick-connect device (260).

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