Cryoablation needle and cryoablation system

Abstract

The utility model discloses a cryoablation needle and a cryoablation system, and relates to the technical field of medical instruments. The cryoablation needle comprises a transmission structure and a heat exchange structure, the transmission structure comprises an outer sleeve and a transmission pipe assembly, the outer sleeve is arranged on the outer side of the transmission pipe assembly in a sleeving mode at intervals, and a first gap is formed to reduce heat exchange between the transmission pipe assembly and the outer sleeve; the transmission pipe assembly is provided with a medium input channel and a medium output channel which are arranged in parallel; the heat exchange structure is connected to one end of the transmission structure, and the heat exchange structure is used for conducting heat exchange with the diseased tissue. According to the cryoablation needle, the pressure loss in the low-temperature medium conveying process can be reduced, heat exchange of the medium between the medium input channel and the medium output channel in the conveying pipe assembly is reduced, heat exchange between the input low-temperature medium and the output low-temperature medium in the heat exchange structure is enhanced, and the refrigeration effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly to a cryoablation needle and a cryoablation system. Background Art

[0002] During the treatment process of cryoablation, a cryoprobe is usually used to deliver a cryogenic medium to cool the lesion site, destroy the lesion cells, and achieve the treatment purpose.

[0003] However, in the existing cryoprobe, the inlet tube and the outlet tube are usually nested with each other, resulting in a large pressure loss during the delivery of the cryogenic medium, affecting the delivery efficiency of the cryogenic medium, and the nested arrangement causes the cold energy of the cryogenic medium in the inlet tube to be consumed by the high-temperature medium in the outlet tube, thereby affecting the refrigeration efficiency of the cryoprobe. Utility Model Content

[0004] The present application provides a cryoablation needle and a cryoablation system to reduce the pressure loss and energy loss during the delivery of the cryogenic medium.

[0005] The present application provides a cryoablation needle, including:

[0006] A transmission structure, including an outer sleeve and a transmission tube assembly. The outer sleeve is sleeved outside the transmission tube assembly at intervals to form a first gap to reduce the heat exchange between the transmission tube assembly and the outer sleeve. The transmission tube assembly is configured with a medium input channel and a medium output channel arranged in parallel;

[0007] A heat exchange structure, connected to one end of the transmission structure, and the heat exchange structure is used to exchange heat with the lesion tissue.

[0008] Based on the above technical solutions, in the cryoablation needle provided by the present application, the medium input channel and the medium output channel are arranged in parallel. Compared with the nested arrangement of the inlet tube and the outlet tube in the prior art, the medium input channel and the medium output channel arranged in parallel in the present application can have a relatively large average hydraulic diameter. Among them, the larger the hydraulic diameter, the smaller the pressure loss of the fluid. Therefore, when the cryoablation needle provided by the present application delivers the cryogenic medium, the pressure loss of the cryogenic medium can be significantly reduced, thereby improving the delivery efficiency of the cryogenic medium and the refrigeration efficiency of the cryoablation needle.

[0009] In some possible implementation manners, the transmission tube assembly includes a first input tube and a first output tube arranged in parallel. The first input tube and the first output tube are spaced apart to form a second gap to reduce the heat exchange between the first input tube and the first output tube;

[0010] The medium input channel is opened in the first input tube, and the medium output channel is opened in the first output tube.

[0011] In some possible embodiments, the second gap is a vacuum environment or filled with a heat insulating medium.

[0012] In some possible embodiments, the transfer tube assembly includes a first input tube and a first output tube arranged in parallel, the first input tube is in contact with the first output tube, the medium input channel is opened in the first input tube, and the medium output channel is opened in the first output tube; or

[0013] The transfer tube assembly includes a first input tube and a first output tube arranged in parallel, the first input tube is close to the first output tube and a heat insulating medium film is clamped between the first input tube and the first output tube, the medium input channel is opened in the first input tube, and the medium output channel is opened in the first output tube.

[0014] In some possible embodiments, the transfer tube assembly includes a transfer tube, the medium input channel and the medium output channel are channels opened in parallel in the transfer tube, and the medium input channel and the medium output channel are separated by a partition.

[0015] In some possible embodiments, the partition is provided with a hollow hole.

[0016] In some possible embodiments, the hollow hole is a vacuum environment or filled with a heat insulating medium.

[0017] In some possible embodiments, the cross-section of the input channel perpendicular to the axial direction of the cryoablation needle and the cross-section of the output channel perpendicular to the axial direction of the cryoablation needle are both D-shaped.

[0018] In some possible embodiments, the transfer tube assembly further includes a functional channel, and the functional channel is arranged in parallel with the medium input channel and the medium output channel.

[0019] In addition, the present application further provides a cryoablation system, including a low-temperature medium supply device and the cryoablation needle provided in each of the above embodiments;

[0020] The low-temperature medium supply device includes a supply end and a return end, the supply end is communicated with the medium input channel, the return end is communicated with the medium output channel, and a circulation loop of the low-temperature medium is formed between the low-temperature medium supply device and the cryoablation needle to enable the low-temperature medium to be recycled. Description of the Drawings

[0021] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0022] Figure 1 Shows a schematic cross-sectional structure diagram of a cryoablation needle in the prior art;

[0023] Figure 2 Shows a schematic cross-sectional structure diagram of a cryoablation needle in some embodiments;

[0024] Figure 3 Shows a partial cross-sectional structure diagram of a transmission structure in some embodiments;

[0025] Figure 4 Shows a top view structure diagram of a transmission structure in some embodiments;

[0026] Figure 5 Shows a top view structure diagram of a transmission structure in some other embodiments;

[0027] Figure 6 Shows a top view structure diagram of a transmission structure in some further embodiments;

[0028] Figure 7 Shows a top view structure diagram of a transmission structure in some yet further embodiments;

[0029] Figure 8 Shows a top view structure diagram of a transmission structure with a functional channel in some embodiments;

[0030] Figure 9 Shows a top view structure diagram of a transmission structure with a functional channel in some other embodiments;

[0031] Figure 10 Shows a top view structure diagram of a transmission structure with a functional channel in some further embodiments;

[0032] Figure 11 Shows a schematic cross-sectional structure diagram of a heat exchange structure in some embodiments;

[0033] Figure 12 Shows a side view structure diagram of a second input pipe in some embodiments;

[0034] Figure 13 Shows a schematic cross-sectional structure diagram of a second input pipe in some embodiments;

[0035] Figure 14Shows a schematic structural diagram of a heat exchange structure in other embodiments;

[0036] Figure 15 Shows a schematic structural diagram of a cryoablation system in some embodiments.

[0037] Description of main element symbols:

[0038] 1000 - Cryoablation needle;

[0039] 100 - Transmission structure; 110 - Outer sleeve; 120 - Transmission tube assembly; 1201 - Medium input channel; 1202 - Medium output channel; 1203 - Function channel; 121 - First input tube; 122 - First output tube; 123 - Transmission tube; 1231 - Partition; 1232 - Hollow hole; 124 - Delivery tube; 130 - Second plug; 141 - First gap; 142 - Second gap;

[0040] 200 - Heat exchange structure; 210 - Second input tube; 211 - Through - hole group; 2111 - First through - hole group; 21111 - First through - hole; 2112 - Second through - hole group; 21121 - Second through - hole; 220 - Second output tube; 230 - Needle tip; 240 - Adapter; 250 - Turbulence tube; 251 - Turbulence teeth; 261 - First sealing head; 262 - Second sealing head;

[0041] 2100 - Inlet tube; 2200 - Outlet tube; 2300 - Vacuum gap; 2400 - Vacuum pipeline;

[0042] 3000 - Low - temperature medium supply device; 3100 - Supply end; 3200 - Return end. Detailed implementation manners

[0043] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0044] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined.

[0046] In this application, unless otherwise clearly specified and limited, terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] In this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0048] Example 1

[0049] As Figure 2 shown, a cryoablation needle 1000 is provided in the example, which can be used to transport a cryogenic medium to provide a cryoablation function for the diseased tissue in a patient's body and destroy diseased cells.

[0050] As Figure 2 and Figure 3 shown, the cryoablation needle 1000 includes a transmission structure 100 and a heat exchange structure 200. Among them, the transmission structure 100 may include an outer sleeve 110 and a transmission tube assembly 120. The outer sleeve 110 is sleeved outside the transmission tube assembly 120. And the outer sleeve 110 is spaced from the transmission tube assembly 120 and forms a first gap 141.

[0051] In the example, the outer sleeve 110 can be made of plastic or metals such as aluminum and copper, or materials such as ceramics. Of course, when the selected material of the outer sleeve 110 permits, the outer sleeve 110 can also be connected to a heating device for heating.

[0052] In an embodiment, a medium input channel 1201 and a medium output channel 1202 arranged in parallel may be configured in the transmission tube assembly 120. The heat exchange structure 200 may be connected to one end of the transmission structure 100.

[0053] During use, the heat exchange structure 200 can penetrate deep into the patient's body to contact the diseased tissue. The medium input channel 1201 can be used to convey a low-temperature medium towards the heat exchange structure 200. The low-temperature medium can exchange heat with the heat exchange structure 200 to cool down the heat exchange structure 200, and then the heat exchange structure 200 exchanges heat with the diseased tissue to rapidly reduce the temperature of the diseased tissue and destroy the diseased cells. The medium output channel 1202 can be used to output the low-temperature medium after heat exchange.

[0054] As Figure 1 and Figure 3 shown, in the prior art, the inlet pipe 2100 and the outlet pipe 2200 of the low-temperature medium are nested and are both circular pipes. Compared with the prior art, in the present application, the medium input channel 1201 and the medium output channel 1202 are arranged in parallel, which can increase the hydraulic diameter of the medium input channel 1201 and the medium output channel 1202, reduce the pressure loss during the transportation of the low-temperature medium, ensure the transportation efficiency of the low-temperature medium, and further improve the refrigeration performance of the cryoablation needle 1000.

[0055] Embodiment 2

[0056] As Figure 2 shown, in the embodiment, a cryoablation needle 1000 is provided. On the basis of Embodiment 1, further:

[0057] As Figure 2 and Figure 3 shown, in some embodiments, the first gap 141 between the transmission tube assembly 120 and the outer sleeve 110 can be in a vacuum environment to achieve the heat insulation effect between the transmission tube assembly 120 and the outer sleeve 110. Thus, the heat exchange between the transmission tube assembly 120 and the outer sleeve 110 can be reduced. On the one hand, the cold loss during the transportation of the low-temperature medium can be reduced. On the other hand, the temperature of the outer sleeve 110 can be prevented from being too low, and the probability of frosting on the surface of the outer sleeve 110 can be reduced.

[0058] In the embodiment, the cryoablation needle 1000 further includes a first plug and a second plug 130. The first plug can be fixedly connected between the transfer tube assembly 120 and the outer sleeve 110, and is located at one end of the transfer structure 100 away from the heat exchange structure 200. The first plug can block one end of the first gap 141 away from the heat exchange structure 200. The second plug 130 can be fixedly connected between the transfer tube assembly 120 and the outer sleeve 110, and is located at one end of the transfer structure 100 close to the heat exchange structure 200. The second plug 130 can block one end of the first gap 141 close to the heat exchange structure 200. Thus, a stable vacuum environment can be created in the first gap 141.

[0059] In some other embodiments, the first gap 141 can also be filled with a heat-insulating medium to achieve the heat-insulating function between the transfer tube assembly 120 and the outer sleeve 110 and hinder the heat transfer between the transfer tube assembly 120 and the outer sleeve 110. Among them, the heat-insulating medium can be at least one of, but not limited to, polyurethane foam, polyimide film, and aerogel felt.

[0060] As Figure 3 and Figure 4 shown, in some embodiments, the transfer tube assembly 120 can include a first input tube 121 and a first output tube 122 arranged in parallel. And the first input tube 121 and the first output tube 122 are spaced apart and form a second gap 142. In the embodiment, the medium input channel 1201 can be opened in the first input tube 121. The medium output channel 1202 is opened in the first output tube 122.

[0061] In some embodiments, the cross-section of the medium input channel 1201 perpendicular to the axis of the cryoablation needle 1000 and the cross-section of the medium output channel 1202 perpendicular to the axis of the cryoablation needle 1000 can both be D-shaped. Correspondingly, both the first input tube 121 and the first output tube 122 can be set as D-shaped tubes. And the planar side wall in the first input tube 121 can be close to the planar side wall of the first output tube 122. Among them, the axis of the cryoablation needle 1000 can refer to the extending direction of the axis L.

[0062] In some other embodiments, the cross-section of the medium input channel 1201 perpendicular to the axis of the cryoablation needle 1000 can also be set into special-shaped shapes such as a fan shape. The cross-section of the medium output channel 1202 perpendicular to the axis of the cryoablation needle 1000 can also be set into special-shaped shapes such as a fan shape. That is, both the medium input channel 1201 and the medium output channel 1202 are special-shaped channels.

[0063] In some other embodiments, the cross-section of the medium input channel 1201 perpendicular to the axis of the cryoablation needle 1000 can also be set into conventional shapes such as a circle. The cross-section of the medium output channel 1202 perpendicular to the axis of the cryoablation needle 1000 can also be set into conventional shapes such as a circle.

[0064] In the embodiments, the medium input channel 1201 and the medium output channel 1202 are both set as D-shaped channels, which can further increase the average hydraulic diameter of the medium input channel 1201 and the medium output channel 1202, reduce the pressure loss during the transportation of the low-temperature medium, ensure the transportation efficiency of the low-temperature medium, and thus improve the refrigeration performance of the cryoablation needle 1000.

[0065] In some embodiments, the second gap 142 can also be in a vacuum environment, which can provide a heat insulation function between the first input pipe 121 and the first output pipe 122 and reduce the heat exchange between the first input pipe 121 and the first output pipe 122. Thus, the cold loss of the low-temperature medium in the first input pipe 121 can be reduced.

[0066] In other embodiments, the second gap 142 can also be filled with a heat insulation medium to achieve the heat insulation function between the first input pipe 121 and the first output pipe 122 and hinder the heat exchange between the first input pipe 121 and the first output pipe 122. The heat insulation medium can be at least one of, but not limited to, polyurethane foam, polyimide film, and aerogel felt.

[0067] In the embodiments, one end of the second gap 142 away from the heat exchange structure 200 can also be blocked by a first plug. One end of the second gap 142 close to the heat exchange structure 200 can be blocked by the second plug 130 together.

[0068] As Figure 5 shown, in other embodiments, the planar side wall of the first input pipe 121 can be attached to the planar side wall of the first output pipe 122. That is, no second gap 142 is provided between the first input pipe 121 and the first output pipe 122. Thus, the average hydraulic diameter of the medium input channel 1201 and the medium output channel 1202 can be further increased, the pressure loss during the transportation of the low-temperature medium can be reduced, the transportation efficiency of the low-temperature medium can be ensured, and the refrigeration performance of the cryoablation needle 1000 can be improved.

[0069] Of course, in some other embodiments, the planar side walls of the first input pipe 121 may be attached to the planar side walls of the first output pipe 122. A heat-insulating medium film may be provided between the first input pipe 121 and the first output pipe 122. On the one hand, the heat exchange between the first input pipe 121 and the first output pipe 122 can be reduced, and the cold loss of the low-temperature medium in the medium input channel 1201 can be reduced. On the other hand, the average hydraulic diameter of the medium input channel 1201 and the medium output channel 1202 can be increased as much as possible, the pressure loss during the transportation of the low-temperature medium can be reduced, the transportation efficiency of the low-temperature medium can be ensured, and the refrigeration performance of the cryoablation needle 1000 can be improved. Among them, the heat-insulating medium film can be pasted between the first input pipe 121 and the first output pipe 122, or the heat-insulating medium film can be plated on the surface of the first input pipe 121 close to the first output pipe 122 or the surface of the first output pipe 122 close to the first input pipe.

[0070] As Figure 6 As shown, in some other embodiments, the transmission pipe assembly 120 may include a transmission pipe 123. The medium input channel 1201 and the medium output channel 1202 can both be opened in the transmission pipe 123 and can be separated by a partition 1231. The cross-section perpendicular to the axial direction of the cryoablation needle 1000 in the medium input channel 1201 and the cross-section perpendicular to the axial direction of the cryoablation needle 1000 in the medium output channel 1202 can both be D-shaped. Among them, a hollow hole 1232 can also be opened in the partition 1231, and the hollow hole 1232 can penetrate the partition 1231 along the axial direction of the cryoablation needle 1000. In addition, the hollow hole 1232 can be in a vacuum environment or filled with a heat-insulating medium, which can achieve heat insulation between the medium input channel 1201 and the medium output channel 1202, reduce the heat exchange between the medium input channel 1201 and the medium output channel 1202, and further reduce the cold loss of the low-temperature medium in the medium input channel 1201. When the hollow hole 1232 is filled with a heat-insulating medium, the heat-insulating medium can be at least one of, but not limited to, polyurethane foam, polyimide film, and aerogel felt. Both ends of the hollow hole 1232 can be blocked by a first plug and a second plug 130 respectively.

[0071] As Figure 7 As shown, in some other embodiments, the transmission pipe assembly 120 may include a transmission pipe 123. The medium input channel 1201 and the medium output channel 1202 can both be opened in the transmission pipe 123 and can be separated by a partition 1231. It can be understood that the partition 1231 can extend from one end of the transmission pipe assembly 120 away from the heat exchange structure 200 to one end close to the heat exchange structure 200. Among them, the cross-section perpendicular to the axial direction of the cryoablation needle 1000 in the medium input channel 1201 and the cross-section perpendicular to the axial direction of the cryoablation needle 1000 in the medium output channel 1202 can both be D-shaped.

[0072] As Figure 1 , Figure 3 and Figure 7 shown, by way of example, in this embodiment, the inner diameter of the outer sleeve 110 is 2.0 mm, the wall thicknesses of the first input pipe 121 and the first output pipe 122 are 0.15 mm, and the first gap 141 is 0.2 mm; in the prior art, the inner diameter of the vacuum pipeline 2400 is 2.0 mm, the wall thicknesses of the inlet pipe 2100 and the outlet pipe 2200 are both 0.15 mm, and the vacuum gap 2300 is 0.2 mm. Taking these as examples, the hydraulic diameter D is calculated respectively. The hydraulic diameter D = 4 A , where A represents the cross-sectional area of the flow field (such as

[0073] χ

[0074] the cross-sectional area perpendicular to the axial direction of the cryoablation needle 1000 in the medium input channel 1201), and χ represents the wetted perimeter of the flow field (i.e., the wetted perimeter). After calculation, the average hydraulic diameter D1 of the medium input channel 1201 and the medium output channel 1202 in this application is 0.63 mm, and the average hydraulic diameter D2 of the inlet pipe 2100 and the outlet pipe 2200 in the prior art is 0.5 mm. It can be seen from this that compared with the prior art, the hydraulic diameter of the transmission pipe assembly 120 provided in this application can be increased by about 26%. However, the larger the hydraulic diameter, the smaller the pressure loss of the cryogenic medium. Therefore, the cryoablation needle 1000 provided in this application can significantly reduce the pressure loss during the transportation of the cryogenic medium, ensure the transportation efficiency of the cryogenic medium, and improve the refrigeration efficiency of the cryoablation needle 1000.

[0075] As Figures 8 to 10As shown, in some other embodiments, the transfer tube assembly 120 further includes a functional channel 1203, which can be arranged in parallel with the medium input channel 1201 and the medium output channel 1202. Among them, the functional channel 1203 can be used to place sensors or inject liquid drugs during the treatment process, etc., to facilitate medical staff to perform other auxiliary function operations without inserting additional instruments to cause discomfort to the patient. In addition, the functional channel 1203 can be formed in the same transfer tube 123 as the medium input channel 1201 and the medium output channel 1202. There can be corresponding partition plates 1231 between the functional channel 1203 and the medium input channel 1201 and the medium output channel 1202. The inside of the partition plate 1231 can be a solid structure, filled with heat insulation medium or in a vacuum environment. Of course, the functional channel 1203 can also be separately formed in a delivery tube 124. The delivery tube 124 can be arranged in parallel with the first input tube 121 and the first output tube 122, and the delivery tube 124 can be arranged in contact with or at intervals from the first input tube 121 and the first output tube 122 respectively. When the delivery tube 124 is arranged at intervals from the first input tube 121 and the first output tube 122 respectively, heat insulation medium can be filled or it can be in a vacuum environment between the delivery tube 124 and the first input tube 121 and between the delivery tube 124 and the first output tube 122.

[0076] As Figure 11 As shown, in some embodiments, the heat exchange structure 200 can include a second input tube 210, a second output tube 220 and a needle tip 230. Among them, the second output tube 220 can be sleeved on the periphery of the second input tube 210 at intervals. In the embodiment, one end of the second output tube 220 can be fixedly sleeved on the second plug 130. It can be understood that the second output tube 220 and the second plug 130 are hermetically arranged. In addition, the second output tube 220 is communicated with the medium output channel 1202.

[0077] The second input tube 210 can be connected to the first input tube 121 through an adapter tube 240, and the second input tube 210 can be communicated with the medium input channel 1201 through the adapter tube 240. In addition, a first sealing head 261 can be arranged at one end of the second input tube 210 close to the adapter tube 240 to disconnect the communication between one end of the second input tube 210 close to the adapter tube 240 and the second output tube 220. In the embodiment, a second sealing head 262 is installed at one end of the second input tube 210 far from the adapter tube 240 to seal one end of the second input tube 210 far from the adapter tube 240 to disconnect the communication between one end of the second input tube 210 far from the adapter tube 240 and the second output tube 220.

[0078] As Figures 11 to 13As shown, a through-hole group 211 communicating with the second output pipe 220 may be formed in the second input pipe 210. Thus, the cryogenic medium located in the second input pipe 210 can be sprayed onto the second output pipe 220 through the through-hole group 211. The tip 230 may be connected to one end of the second output pipe 220 away from the transmission structure 100.

[0079] During use, the tip 230 can be used for puncturing, enabling the heat exchange structure 200 to reach the diseased tissue location at a certain depth inside the patient's body. The cryogenic medium can be sprayed from the second input pipe 210 onto the second output pipe 220 through the through-hole group 211. The cryogenic medium can exchange heat with the second output pipe 220, transferring the cold quantity to the second output pipe 220. The second output pipe 220 can exchange heat with the surrounding diseased tissue, delivering the cold quantity to the diseased tissue as much as possible and forming an ice ball. In the embodiment, the cryogenic medium is sprayed onto the second output pipe 220 through the through-hole group 211, which can increase the spraying speed of the cryogenic medium, improve the heat exchange efficiency between the cryogenic medium and the second output pipe 220, and further improve the heat exchange efficiency between the second output pipe 220 and the surrounding diseased tissue, enhancing the refrigeration efficiency of the cryoablation needle 1000.

[0080] In some embodiments, the through-hole group 211 may include a first through-hole group 2111 and a second through-hole group 2112. The first through-hole group 2111 and the second through-hole group 2112 can each be provided in one group, two groups, four groups, etc. according to needs. In the embodiment, the first through-hole group 2111 and the second through-hole group 2112 may be alternately arranged in sequence along the axial direction of the cryoablation needle 1000.

[0081] The first through-hole group 2111 may include a plurality of first through-holes 21111, and the plurality of first through-holes 21111 may be arranged at intervals around the circumference of the second input pipe 210. The second through-hole group 2112 may include a plurality of second through-holes 21121, and the plurality of second through-holes 21121 may also be arranged at intervals along the circumference of the second input pipe 210. Additionally, along the circumference of the second input pipe 210, the first through-holes 21111 may be arranged offset from the adjacent second through-holes 21121. Thus, when the cryogenic medium is sprayed onto the second output pipe 220 through the first through-holes 21111 and the second through-holes 21121, the effective heat exchange area between the cryogenic medium and the second output pipe 220 can be increased, improving the heat exchange efficiency between the cryogenic medium and the second output pipe 220, and ensuring that the cryogenic medium transfers the cold quantity to the surrounding diseased tissue through the second output pipe 220 as much as possible. Thereby, the refrigeration efficiency of the cryoablation needle 1000 can also be further improved.

[0082] In the embodiment, the heat exchange structure 200 enables the low-temperature medium in the second input pipe 210 to spray towards the second output pipe 220 through the through-hole group 211, which can make the low-temperature medium in the second output pipe 220 fully contact with the second output pipe 220, improve the heat exchange efficiency between the low-temperature medium and the second output pipe 220, and improve the refrigeration efficiency of the cryoablation needle 1000.

[0083] Embodiment III

[0084] In the embodiment, a cryoablation needle 1000 is provided. On the basis of Embodiment II, the differences include:

[0085] As Figure 14 shown, the heat exchange structure 200 may include a second input pipe 210, a second output pipe 220, and a needle tip 230. Among them, the second output pipe 220 may be sleeved on the circumferential side of the second input pipe 210 at intervals. In the embodiment, one end of the second output pipe 220 may be fixedly sleeved on the second plug 130. It can be understood that a sealing arrangement is provided between the second output pipe 220 and the second plug 130. In addition, the second output pipe 220 is communicated with the medium output channel 1202.

[0086] The second input pipe 210 may be connected to the first input pipe 121 through an adapter pipe 240, and the second input pipe 210 may be communicated with the medium input channel 1201 through the adapter pipe 240. In the embodiment, the end of the second input pipe 210 away from the adapter pipe 240 may be communicated with the second output pipe 220. Correspondingly, the low-temperature medium in the second input pipe 210 may enter the second output pipe 220 through the end of the second input pipe 210 away from the adapter pipe 240. The needle tip 230 may be connected to the end of the second output pipe 220 away from the transmission structure 100.

[0087] A spoiler tube 250 is further sleeved on the circumferential side of the second input pipe 210, that is, the spoiler tube 250 may be located on the side of the second input pipe 210 close to the second output pipe 220. In the embodiment, the spoiler tube 250 may be arranged closely against the side wall of the second input pipe 210, that is, there is no gap between the spoiler tube 250 and the second input pipe 210. There may be a gap between the spoiler tube 250 and the second output pipe 220 to facilitate the smooth passage of the low-temperature medium.

[0088] In the embodiment, spoiler teeth 251 protrude from the side of the spoiler tube 250 away from the second input pipe 210. Among them, the spoiler teeth 251 may be arranged in a circle around the circumferential direction of the spoiler tube 250. It can be understood that a plurality of spoiler teeth 251 may be provided, and the plurality of spoiler teeth 251 may be arranged in sequence along the axial direction of the cryoablation needle 1000.

[0089] In some other embodiments, the plurality of spoiler teeth 251 may also be continuously arranged. Correspondingly, the plurality of spoiler teeth 251 as a whole may be presented as spiral teeth.

[0090] In the embodiment, the gap t between the end surface of the spoiler tooth 251 away from one end of the second input pipe 210 and the inner wall of the second output pipe 220 can be set as small as possible. At the same time, the angle α between the flow-facing surface in the spoiler tooth 251 and the flow direction of the cryogenic medium can be set as large as possible. Thus, the spoiler effect can be enhanced, the cryogenic medium can be fully contacted with the second output pipe 220, the heat exchange effect between the cryogenic medium and the second output pipe 220 can be enhanced, and further the heat exchange effect between the cryogenic medium and the heat exchange structure 200 can be enhanced. The cold quantity can be transferred to the diseased tissue of the patient through the heat exchange structure 200 as much as possible, and the refrigeration efficiency can be improved.

[0091] As Figure 2 、 Figure 3 and Figure 15 shown, in the embodiment, a cryoablation system is further provided, which may include a cryogenic medium supply device 3000 and the cryoablation needle 1000 provided in the embodiment.

[0092] The cryogenic medium supply device 3000 can be used to supply the cryogenic medium to the cryoablation needle 1000. In the embodiment, the cryogenic medium supply device 3000 includes a supply end 3100 and a return end 3200. Among them, the supply end 3100 can be communicated with the medium input channel 1201, and the return end 3200 can be communicated with the medium output channel 1202.

[0093] During use, the cryogenic medium supply device 3000 can supply the cryogenic medium carrying cold quantity to the medium input channel 1201 of the cryoablation needle 1000 through the supply end 3100. The cryogenic medium can be supplied to the heat exchange structure 200 through the medium input channel 1201 and exchange heat with the surrounding diseased tissue. The cryogenic medium after heat exchange can be transported to the return end 3200 through the medium output channel 1202 to return to the cryogenic medium supply device 3000. After obtaining cold quantity in the cryogenic medium supply device 3000, the cryogenic medium after heat exchange can be sent back to the cryoablation needle 1000 again. That is, a circulation loop of the cryogenic medium can be formed between the cryogenic medium supply device 3000 and the cryoablation needle 1000, and the circulation use of the cryogenic medium can be realized.

[0094] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0095] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A cryoablation needle, characterized in that: include: A transmission structure (100) comprises an outer sleeve (110) and a transmission pipe assembly (120), wherein the outer sleeve (110) is sleeved on the outside of the transmission pipe assembly (120) at intervals and forms a first gap (141) to reduce heat exchange between the transmission pipe assembly (120) and the outer sleeve (110), and the transmission pipe assembly (120) is provided with a medium input channel (1201) and a medium output channel (1202) arranged in parallel; A heat exchange structure (200) is connected to one end of the transmission structure (100), and the heat exchange structure (200) is used to perform heat exchange with the diseased tissue.

2. The cryoablation needle according to claim 1, characterized in that: The transmission pipe assembly (120) comprises a first input pipe (121) and a first output pipe (122) arranged in parallel, wherein the first input pipe (121) and the first output pipe (122) are spaced apart from each other and form a second gap (142) to reduce heat exchange between the first input pipe (121) and the first output pipe (122); The medium input channel (1201) is opened in the first input pipe (121), and the medium output channel (1202) is opened in the first output pipe (122).

3. The cryoablation needle according to claim 2, characterized in that: The second gap (142) is a vacuum environment or is filled with a heat insulating medium.

4. The cryoablation needle according to claim 1, characterized in that: The transmission pipe assembly (120) comprises a first input pipe (121) and a first output pipe (122) arranged in parallel, the first input pipe (121) and the first output pipe (122) are in close contact with each other, the medium input channel (1201) is opened in the first input pipe (121), and the medium output channel (1202) is opened in the first output pipe (122); or The transmission pipe assembly (120) comprises a first input pipe (121) and a first output pipe (122) arranged in parallel, the first input pipe (121) is close to the first output pipe (122) and a heat insulating medium film is sandwiched between the first input pipe (121) and the first output pipe (122), the medium input channel (1201) is opened in the first input pipe (121), and the medium output channel (1202) is opened in the first output pipe (122).

5. The cryoablation needle according to claim 1, characterized in that: The transmission tube assembly (120) comprises a transmission tube (123); the medium input channel (1201) and the medium output channel (1202) are channels opened in parallel in the transmission tube (123); and the medium input channel (1201) and the medium output channel (1202) are separated by a partition (1231).

6. The cryoablation needle according to claim 5, characterized in that: The partition plate (1231) is provided with a hollow hole (1232).

7. The cryoablation needle according to claim 6, characterized in that: The hollow hole (1232) is in a vacuum environment or is filled with a heat-insulating medium.

8. The cryoablation needle according to any one of claims 1 to 7, characterized in that: The cross section of the medium input channel (1201) perpendicular to the axial direction of the cryoablation needle and the cross section of the medium output channel (1202) perpendicular to the axial direction of the cryoablation needle are both D-shaped.

9. The cryoablation needle according to any one of claims 1 to 7, characterized in that: The transmission tube assembly (120) further comprises a functional channel (1203), wherein the functional channel is arranged in parallel with the medium input channel (1201) and the medium output channel (1202).

10. A cryoablation system, characterized in that: It comprises a low-temperature medium supply device (3000) and a cryoablation needle as claimed in any one of claims 1 to 9; The low-temperature medium supply device (3000) includes a supply end (3100) and a return end (3200), the supply end (3100) is connected to the medium input channel (1201), and the return end (3200) is connected to the medium output channel (1202), and a circulation loop of the low-temperature medium is formed between the low-temperature medium supply device (3000) and the cryoablation needle to allow the low-temperature medium to be circulated.

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