A percutaneous steam ablation needle with water circulation

Abstract

The present invention discloses a percutaneous puncture steam ablation needle with water circulation. The steam connection section and the steam tail section of the steam pipe are respectively connected to the needle and the handle housing, and the output end of the steam generating unit is connected to the steam tail section, so that the steam generated by the steam generating unit can enter the needle through the steam pipe and be output to the affected area through the steam output channel. A water circulation unit is further provided, which includes a circulating water inlet pipeline, a circulating needle body section, and a circulating water outlet pipeline. The circulating needle body section is configured to be sleeved on the steam main section to absorb and carry away the heat emitted outward by the steam in the steam main section. The heat is carried away by the water that always keeps flowing, thereby ensuring the thermal insulation effect of the needle body of the ablation needle and avoiding scalding the tissue along the puncture path. At least a portion of the circulating water outlet pipeline is arranged between the steam generating unit and the handle housing to receive and carry away the heat emitted by the steam generating unit toward the handle housing, thereby avoiding overheating of the handle.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a percutaneous puncture steam ablation needle with water circulation. Background Art

[0002] Currently, the steam delivery portion in a steam ablation pistol is inserted through the urethra into the patient to reach the patient's prostatic urethra, and the steam delivery needle is extended under the control of a motor. The steam delivery needle is roughly transverse to the steam delivery portion, moves forward through the prostatic urethra and enters the transition zone of the prostate; and steam is delivered through the distally facing steam delivery port of the steam delivery needle to guide the steam from the device distally into the prostate.

[0003] Currently, steam ablation pistols are used to enter the human body through natural cavities. If the steam delivery portion of the steam ablation pistol cannot enter the body through natural cavities, other methods must be considered. However, these methods require high thermal insulation, and even slightly higher temperatures can burn the tissue within the channel. Related technological developments include the use of ablation needles with vacuum interlayers, which provide vacuum insulation. However, percutaneous ablation needles suffer from problems such as poor vacuum tube insulation and the handle's tendency to overheat, which cannot effectively protect the patient's healthy tissue and the operator. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a percutaneous steam ablation needle with water circulation to solve the problems of poor thermal insulation effect and easy overheating of the handle of the existing vacuum ablation needle.

[0005] In order to solve the above problems, the technical solution of the present invention is:

[0006] The present invention provides a percutaneous steam ablation needle with water circulation, comprising:

[0007] A needle head, wherein a receiving cavity is provided in the needle head, and a steam output channel is provided on the needle head and passes through and communicates with the receiving cavity;

[0008] A steam pipe, the steam pipe comprising a steam connecting section, a steam main section and a steam tail section connected in sequence; the steam connecting section extends into and communicates with the receiving chamber;

[0009] A handle, the handle comprising a handle housing and a steam generating portion located therein, the steam tail section extending into and fixed in the handle housing, the output end of the steam generating portion being in communication with the steam tail section;

[0010] A water circulation part, which includes a circulating water inlet pipeline, a circulating needle body section and a circulating water outlet pipeline that are connected in sequence, the axial head end of the circulating needle body section is fixed to the needle head, the axial tail end of the circulating needle body section is fixed and extends into the handle shell, and the water circulation channel in the circulating needle body section is sleeved on the steam main section, and the circulating water in the circulating needle body section is configured to absorb and take away the heat emitted to the outside by the steam in the steam main section; and at least part of the circulating water outlet pipeline is arranged between the steam generating part and the handle shell, and this part of the circulating water outlet pipeline is configured to receive and take away the heat emitted by the steam generating part toward the handle shell.

[0011] The percutaneous steam ablation needle with water circulation of the present invention, the water circulation part also includes a water circulation base;

[0012] The water circulation base is fixed in the handle housing, and a water inlet channel and a water outlet channel are provided in the water circulation base; the steam tail section, the axial tail end of the circulation needle section, the output end of the circulation water inlet pipeline and the input end of the circulation water outlet pipeline are respectively fixed to the water circulation base; and the water inlet channel is respectively connected to the input end of the water circulation channel and the output end of the circulation water inlet pipeline, and the water outlet channel is respectively connected to the output end of the water circulation channel and the input end of the circulation water outlet pipeline.

[0013] The percutaneous steam ablation needle with water circulation of the present invention comprises a water circulation seal and an outer tube, a shunt tube and a heat preservation tube which are sequentially sleeved and spaced apart.

[0014] The first end of the outer tube in the axial direction is fixed to the needle, and the second end of the outer tube in the axial direction is fixed to the handle housing and / or the water circulation base;

[0015] The first end of the insulation pipe in the axial direction is connected to the water circulation seal, and the water circulation seal seals the gap between the first end of the insulation pipe in the axial direction and the outer pipe, and the second end of the insulation pipe in the axial direction is fixed to the water circulation base;

[0016] A reflux gap is formed between the first end of the diverter pipe in the axial direction and the water circulation seal, and the second end of the diverter pipe in the axial direction is fixed to the water circulation base.

[0017] The percutaneous steam ablation needle with water circulation of the present invention comprises a water circulation base including a water inlet base, a water outlet base and a cover plate;

[0018] The water inlet base is fixedly connected to the handle housing, and is provided with an outer tube through groove corresponding to the outer tube and a first mounting through groove communicating with the outer tube through groove. The water inlet base is also provided with a water inlet through groove communicating with the first mounting through groove, and the outer tube extends into and is fixed to the outer tube through groove;

[0019] The water outlet base is fixed to the first mounting groove, and the water outlet base is provided with a diversion pipe groove corresponding to the diversion pipe and a second mounting groove connected to the diversion pipe groove, and the water outlet base is provided with a water outlet groove connected to the second mounting groove, and the diversion pipe extends into and is fixed to the diversion pipe groove; wherein the first mounting groove, the water outlet base, the diversion pipe, and the water inlet groove cooperate to form the water inlet channel;

[0020] The cover plate is fixed to the second mounting groove, and an insulation pipe groove corresponding to the insulation pipe is provided on the cover plate, and the insulation pipe extends into and is fixed to the insulation pipe groove; wherein, the second mounting groove, the cover plate, the insulation pipe, and the water outlet groove cooperate to form the water outlet channel.

[0021] The percutaneous steam ablation needle with water circulation of the present invention also includes a steam seal, which is arranged between the steam tube and the circulation needle body section, and the steam seal is configured to prevent steam from entering the gap between the steam tube and the circulation needle body section from the connection between the steam connecting section and the receiving cavity.

[0022] In the percutaneous steam ablation needle with water circulation of the present invention, the steam output channel includes a plurality of pore groups arranged at intervals along the circumferential direction, and each of the pore groups includes a plurality of pores arranged at intervals along the axial direction.

[0023] The percutaneous steam ablation needle with water circulation of the present invention comprises a steam generating portion including a steam generating support and a steam generating assembly;

[0024] The steam generating bracket is fixed in the handle housing and is divided into a steam generating chamber located in the steam generating bracket and a circulating water outlet chamber located between the steam generating bracket and the handle housing, and the circulating water outlet chamber is arranged around the steam generating chamber;

[0025] The steam generating component is arranged in the steam generating chamber, and the output end of the steam generating component is communicated with the steam tail section; the circulating water outlet pipeline is wound and arranged in the circulating water outlet chamber.

[0026] The percutaneous steam ablation needle with water circulation of the present invention, the steam generating component includes a coil, an induction heating component, and a transfer tube;

[0027] The coil is fixed in the steam generating chamber, and the input end of the coil is connected to the steam inlet pipe, and the output end of the coil is connected to the steam tail section through the adapter pipe;

[0028] The induction heating component is fixed in the steam generating chamber and sleeved on the coil. The induction heating component is configured to generate an alternating magnetic field to form eddy currents in the coil and heat it.

[0029] The percutaneous steam ablation needle with water circulation of the present invention further comprises a temperature sensing unit, wherein the temperature measuring end of the temperature sensing unit is arranged at the output end of the coil.

[0030] The present invention provides a percutaneous puncture steam ablation needle with water circulation, comprising a needle body and a handle, wherein the end of the needle body is fixedly connected to the front end of the handle, the steam water inlet pipe enters the interior of the handle through the end of the handle, and further comprises a water circulation pipe, a water circulation base is arranged in the handle, the water circulation base is connected to the end of the needle body, the water circulation pipe enters the interior of the handle through the end of the handle and is connected to the water circulation base, the water circulation pipe comprises a circulating water outlet pipe and a circulating water inlet pipe, the needle body comprises a needle, an outer tube, a shunt pipe, an insulation pipe and a steam pipe, the needle has an airway inside, and the needle The end is fixedly connected to the head end of the outer tube, and the end of the outer tube extends to the water circulation base. The inside of the outer tube is coaxially sleeved with a shunt tube, an insulation tube and a steam tube in sequence from the outside to the inside. The front ends of the shunt tube and the insulation tube are suspended in the air, and the ends extend to the water circulation base. The front end of the steam tube is inserted into the airway of the needle, and the rear end passes through the water circulation base; a steam sealing ring is provided between the outer tube and the steam tube, and a water circulation sealing ring is provided between the outer tube and the insulation tube. The circulating water inlet pipeline is connected between the outer tube and the shunt tube through the water circulation base, and the circulating water outlet pipeline is connected between the outer tube and the insulation tube through the water circulation base.

[0031] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0032] One embodiment of the present invention connects the steam connection section and the steam tail section of the steam pipe to the needle and the handle housing, respectively, and connects the output end of the steam generating unit to the steam tail section, so that the steam generated by the steam generating unit can enter the needle through the steam pipe and be output to the affected area through the steam output channel. A water circulation unit is further provided, comprising a circulating water inlet pipe, a circulating needle body section, and a circulating water outlet pipe. The circulating needle body section is configured to be sheathed over the steam main section to absorb and carry away heat dissipated outward by the steam within the steam main section. The heat is carried away by the constantly flowing water, thereby ensuring the thermal insulation effect of the needle body of the ablation needle and preventing burns to tissue along the puncture path. At least a portion of the circulating water outlet pipe is arranged between the steam generating unit and the handle housing to receive and carry away heat dissipated by the steam generating unit toward the handle housing, thereby preventing heat generated by the steam generating unit from being transferred to the handle housing and preventing overheating of the handle. This solves the problem of poor thermal insulation and easy overheating of the handle in existing vacuum ablation needles. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the external structure of the percutaneous steam ablation needle with water circulation of the present invention;

[0034] Figure 2 This is a schematic diagram of the internal structure of the handle of the present invention;

[0035] Figure 3 This is a schematic structural diagram of the water circulation base of the present invention;

[0036] Figure 4 Schematic diagram of the needle structure of the present invention;

[0037] Figure 5 This is a schematic diagram of the circulating water circulation path of the present invention;

[0038] Figure 6 Schematic diagram of the steam delivery path of the present invention.

[0039] Explanation of reference numerals: 1. needle body; 11. needle head; 111. needle tip; 112. air hole; 113. airway; 114. tail end boss; 12. outer tube; 13. shunt tube; 14. insulation tube; 15. steam tube; 16. water circulation sealing ring; 17. steam sealing ring; 2. handle; 21. water circulation base; 211. water inlet base; 212. water outlet base; 213. cover plate; 22. circuit board assembly; 221. circuit board; 22 2. Thermocouple; 23. Housing; 231. Front housing; 232. Main housing; 233. Rear housing; 24. Induction heating assembly; 241. Adapter tube; 242. Front fixing bracket; 243. Coil; 244. Coil fixing seat; 245. Coil; 246. Rear fixing bracket; 3. Water circulation pipeline; 31. Circulating water outlet pipeline; 32. Circulating water inlet pipeline; 4. Steam inlet pipeline; 5. Cable assembly; 51. Signal line; 52. Power line. DETAILED DESCRIPTION

[0040] The following is a further detailed description of a percutaneous steam ablation needle with water circulation proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description.

[0041] Example 1

[0042] See Figures 1 to 6 In one embodiment, a percutaneous steam ablation needle with water circulation includes a needle 11, a steam tube 15, a handle 2 and a water circulation part.

[0043] The needle 11 has a receiving chamber within it, and a steam output channel extending through and connected to the receiving chamber. The steam pipe 15 comprises a steam connection section, a main steam section, and a steam tail section, which are connected in sequence. The steam connection section extends into and connects to the receiving chamber. The handle 2 comprises a handle housing and a steam generator located therein. The steam tail section extends into and is fixed within the handle housing, and the output end of the steam generator is connected to the steam tail section.

[0044] The water circulation unit includes a circulating water inlet pipe 32, a circulating needle section, and a circulating water outlet pipe 31, which are connected in sequence. The axial head end of the circulating needle section is fixed to the needle head 11, and the axial tail end of the circulating needle section is fixed and extends into the handle housing. In addition, the water circulation channel within the circulating needle section is sheathed in the steam main section. The circulating water within the circulating needle section is configured to absorb and remove heat dissipated outward by steam within the steam main section. In addition, at least a portion of the circulating water outlet pipe 31 is arranged between the steam generating unit and the handle housing. This portion of the circulating water outlet pipe 31 is configured to receive and remove heat dissipated from the steam generating unit toward the handle housing.

[0045] This embodiment connects the steam connection section and steam tail section of the steam pipe 15 to the needle 11 and the handle housing, respectively, and connects the output end of the steam generating unit to the steam tail section. This allows steam generated by the steam generating unit to enter the needle 11 through the steam pipe 15 and be output to the affected area through the steam output channel. Furthermore, a water circulation unit is provided, comprising a circulating water inlet pipe 32, a circulating needle body section, and a circulating water outlet pipe 31. The circulating needle body section is configured to be sheathed within the steam main section to absorb and remove heat dissipated from the steam in the steam main section. This heat is removed by the continuously flowing water, ensuring the thermal insulation of the needle body 1 of the ablation needle and preventing burns to tissue along the puncture path. At least a portion of the circulating water outlet pipe 31 is arranged between the steam generating unit and the handle housing to receive and remove heat dissipated by the steam generating unit toward the handle housing, thereby preventing heat generated by the steam generating unit from being transferred to the handle housing and overheating of the handle 2. This solves the problem of poor thermal insulation and easy overheating of the handle 2 that exists in existing vacuum ablation needles.

[0046] The specific structure of the percutaneous steam ablation needle with water circulation in this embodiment is further described below:

[0047] In this embodiment, the handle housing can be specifically a shell 23, which can specifically include a front shell 231, a main shell 232, and a rear shell 233. The main shell 232 is a cylindrical shell with two open ends, while the front shell 231 and rear shell 233 are used to seal the two openings. The front shell 231, rear shell 233, and main shell 232 are all secured by gluing at the seams. The rear shell 233 can be fixed to the circulating water inlet pipe 32, circulating water outlet pipe 31, steam inlet pipe 4, and cable assembly 5.

[0048] In this embodiment, the water circulation unit also includes a water circulation base 21. The water circulation base 21 is fixed within the front housing 231 and is provided with a water inlet and outlet channel. The steam tail section, the axial end of the circulation needle section, the output end of the circulation water inlet pipe 32, and the input end of the circulation water outlet pipe 31 are respectively fixed to the water circulation base. The water inlet channel connects the input end of the water circulation channel with the output end of the circulation water inlet pipe 32, and the water outlet channel connects the output end of the water circulation channel with the input end of the circulation water outlet pipe 31.

[0049] Furthermore, the above-mentioned circulation needle body section may specifically include a water circulation seal and an outer tube 12, a shunt tube 13 and a heat preservation tube 14 which are sequentially sleeved and spaced apart.

[0050] The first axial end of the outer tube 12 is fixed to the needle 11 (specifically, a tail end boss 114 with a smaller diameter can be provided on the outer wall surface of the tail of the needle 11, and the outer tube 12 can be sleeved on the tail end boss 114 and connected by laser welding), and the second axial end of the outer tube 12 is fixed to the handle housing and / or the water circulation base 21 (for ease of assembly, the second axial end of the outer tube 12 can be set to be fixed on the water circulation base 21).

[0051] The first axial end of the insulation tube 14 is connected to a water circulation seal (specifically, a water circulation seal ring 16), and the water circulation seal seals the gap between the first axial end of the insulation tube 14 and the outer tube 12. That is, the water circulation seal is used to seal the first end of the annular channel formed between the outer ring surface of the insulation tube 14 and the inner ring surface of the outer tube 12 to close it. The second axial end of the insulation tube 14 is fixed to the water circulation base 21, and the second end of the annular channel formed between the outer ring surface of the insulation tube 14 and the inner ring surface of the outer tube 12 is in an open state. The insulation tube 14 can be specifically configured as a tube body made of a relatively thick insulation material that fits the steam main section, or it can be configured as a tube body with a gap between the steam main section and the gap to reduce the heat transfer efficiency. No specific limitation is made here.

[0052] A diverter pipe 13 is further provided, and a reflux gap is formed between the first axial end of the diverter pipe 13 and the water circulation seal, and the second axial end of the diverter pipe 13 is fixed to the water circulation base 21, that is, the diverter pipe 13 divides the annular channel to form an annular water inlet cavity located in the outer circle and an annular water outlet cavity located in the inner circle. The input end of the annular water inlet cavity is connected to the water inlet channel, the output end of the annular water inlet cavity is connected to the input end of the annular water outlet cavity through the reflux gap, and the output end of the annular water outlet cavity is connected to the water outlet channel.

[0053] Specifically, the water circulation base 21 includes a water inlet base 211 , a water outlet base 212 and a cover plate 213 .

[0054] The water inlet base 211 is fixedly connected to the front shell 231. The water inlet base 211 is provided with an outer tube groove corresponding to the outer tube 12 and a first mounting groove connected to the outer tube groove. The water inlet base 211 is provided with a water inlet groove connected to the first mounting groove. The outer tube 12 extends into and is fixed in the outer tube groove. The joint between the outer tube 12 and the outer tube groove is fixed and sealed with glue.

[0055] The outlet base 212 is fixed to the first mounting groove. The outlet base 212 does not extend into the bottom of the first mounting groove, thereby creating space for forming the water inlet channel. The joint between the outlet base 212 and the first mounting groove is fixed and sealed with glue. The outlet base 212 is provided with a diverter pipe groove corresponding to the diverter pipe 13 and a second mounting groove connected to the diverter pipe groove. The outlet base 212 is also provided with a water outlet groove connected to the second mounting groove. The diverter pipe 13 extends into and is fixed to the diverter pipe groove. The joint between the diverter pipe 13 and the diverter pipe groove is fixed and sealed with glue. Among them, the first mounting groove, the outlet base 212, the diverter pipe 13, and the water inlet groove cooperate to form the water inlet channel.

[0056] The cover plate 213 is fixed to the second mounting groove and does not extend into the bottom of the second mounting groove, thereby creating space for forming the water outlet channel. The joint between the cover plate 213 and the second mounting groove is sealed with glue. The cover plate 213 is provided with an insulation pipe groove corresponding to the insulation pipe 14. The insulation pipe 14 extends into and is fixed to the insulation pipe groove. The joint between the insulation pipe 14 and the insulation pipe groove is sealed with glue. The second mounting groove, cover plate 213, insulation pipe 14, and water outlet groove cooperate to form the aforementioned water outlet channel.

[0057] In this embodiment, the percutaneous steam ablation needle may further include a steam seal disposed between the steam tube 15 and the circulation needle body section, and configured to prevent steam from entering the gap between the steam tube 15 and the circulation needle body section at the connection between the steam connection section and the receiving cavity. Specifically, the steam seal may be disposed between the outer circumference of the steam tube 15 and the inner circumference of the outer tube 12, and positioned near the needle tip 11, thereby preventing steam from entering the interlayer between the insulation tube 14 and the steam tube 15. The steam seal may specifically be a steam sealing ring 17.

[0058] In this embodiment, the aforementioned receiving cavity is an axially extending air passage 113 defined within the needle 11. The steam output passage comprises a plurality of circumferentially spaced groups of air holes 112. Each group of air holes 112 comprises a plurality of axially spaced air holes 112, each of which penetrates the outer wall of the needle 11 and the outer circumferential surface of the air passage 113. Specifically, there may be three groups of air holes 112, each with an angle of 120° between the groups, and each group of air holes 112 comprises four air holes 112.

[0059] Furthermore, the tip of the needle 11 is a triangular needle tip 111, which is convenient for puncturing skin and tissues.

[0060] In this embodiment, the steam generating unit includes a steam generating bracket and a steam generating assembly. The steam generating bracket is fixed to the main housing 232 and is divided into a steam generating chamber located within the steam generating bracket and a circulating water outlet chamber located between the steam generating bracket and the main housing 232. The circulating water outlet chamber is arranged around the steam generating chamber.

[0061] The steam generating assembly is disposed in the steam generating chamber, and the output end of the steam generating assembly is connected to the steam tail section. The circulating water outlet pipe 31 is wound around the circulating water outlet chamber, that is, wound around the inner surface of the annular circulating water outlet chamber, and the specific winding method can be spiral winding.

[0062] Furthermore, the steam generating bracket may specifically include a front fixing bracket 242 and a rear fixing bracket 246 , and the joints between the front fixing bracket 242 and the rear fixing bracket 246 are fixed by gluing.

[0063] Furthermore, the steam generating assembly may include a coil 243, an induction heating assembly 24, and a transfer tube 241. The coil 243 is fixed in the steam generating chamber, and the input end of the coil 243 is connected to the steam water inlet pipe 4, and the output end of the coil 243 is connected to the steam tail section through the transfer tube 241. The induction heating assembly 24 is fixed in the steam generating chamber and coaxially sleeved on the coil 243. The induction heating assembly 24 is configured to generate an alternating magnetic field to form eddy currents and heat in the coil 243. The induction heating assembly 24 may specifically include a coil 245 and a coil fixing seat 244. The coil 245 is wound around the coil fixing seat 244 and fixed by glue. This structure can ensure that the coil 245 and the coil 243 are in a relatively static state, thereby maximizing the stability and consistency of the power output during ablation. After passing through the needle body 1, the circulating water flows out of the handle 2 through the spirally wound circulating water outlet pipe 31, removing excess heat from the steam generating assembly. This keeps the outside of the handle 2 cool, preventing burns to the operator while handling the instrument. The front end of the coil 243 is connected to the steam pipe 15 via the adapter pipe 241, and the rear end is connected to the steam inlet pipe 4. The coil 245 is welded to the power wire 52 in the cable assembly 5, and the welds are insulated.

[0064] In this embodiment, the percutaneous steam ablation needle may further include a temperature sensing unit, and the temperature measuring end of the temperature sensing unit is arranged at the output end of the coil 243. The temperature sensing unit can be specifically a circuit board assembly 22, and the circuit board assembly 22 includes a circuit board 221 and a thermocouple 222. Specifically, the circuit board 221 is inserted into the closed slot formed by the main shell 232 and the front shell 231 (that is, the chamber where the water circulation base 21 is located), so that the circuit board 221 is reliably fixed; a signal line 51 connector is provided on the circuit board 221 for inserting the signal line 51 in the cable assembly 5; one end of the thermocouple 222 is welded to the circuit board 221, and the other end is fixed to the outlet end of the coil 243 by laser welding, which is used to monitor the temperature of the outlet end of the coil 243 in real time and accurately control the ablation effect. Preferably, the number of thermocouples 222 is two.

[0065] Example 2

[0066] like Figure 1 Figure 2 As shown, a percutaneous steam ablation needle with water circulation in this embodiment includes a needle body 1, a handle 2, a water circulation pipeline 3, a steam water inlet pipeline 4 and a cable assembly 5. The handle 2 includes a water circulation base 21, a circuit board assembly 22, a shell 23 and an induction heating assembly 24. The water circulation base 21, the circuit board assembly 22 and the induction heating assembly 24 are arranged in the shell 23. The end of the needle body 1 is fixedly connected to the front end of the handle 2. The water circulation pipeline 3, the steam water inlet pipeline 4 and the cable assembly 5 enter the interior of the handle 2 through the end of the handle 2 and are respectively connected to the water circulation base 21, the induction heating assembly 24 and the circuit board assembly 22. The induction heating assembly 24 is electrically connected to the cable assembly 5.

[0067] like Figure 4As shown, the needle body 1 includes a needle 11, an outer tube 12, a shunt tube 13, an insulation tube 14, a steam tube 15, a water circulation sealing ring 16 and a steam sealing ring 17. Specifically, the head end of the needle 11 is a triangular needle tip 111, which is convenient for puncturing the skin and tissues. There is an airway 113 inside, and air holes 112 are set on the side of the airway 113. There are four in a group, a total of three groups, and the angle between each group is 120°, so that the steam is more evenly distributed when it is ejected, thereby obtaining a more ideal ablation area; the end of the needle 11 has a tail end boss 114, the front end inner hole of the outer tube 12 cooperates with the tail end boss 114 and is laser welded at the seam, and the end extends to the water circulation base 21, and the inner part of the outer tube 12 is coaxially sleeved with a shunt tube 13, an insulation tube 14 and a steam tube 15 from the outside to the inside. The front ends of the shunt tube 13 and the insulation tube 14 It is suspended in the air, with the end extending to the water circulation base 21. The front end of the steam pipe 15 is inserted into the airway 113 of the needle 11, and the rear end passes through the water circulation base 21 and is connected to the induction heating component 24. A steam sealing ring 17 is provided between the outer tube 12 and the steam pipe 15 to prevent the steam entering the airway 113 from flowing back into the interlayer between the insulation tube 14 and the steam pipe 15. A water circulation sealing ring 16 is provided between the outer tube 13 and the insulation tube 14 to form a closed end at the front end of the outer tube 12 and the insulation tube 14, so that the cooling water flowing into the interlayer between the outer tube 12 and the diverter tube 13 can flow out smoothly from the interlayer between the diverter tube 13 and the insulation tube 14 through the closed end. The water circulation pipeline 3 includes a circulating water outlet pipeline 31 and a circulating water inlet pipeline 32. The circulating water inlet pipeline 32 is connected between the outer tube 12 and the shunt tube 13 through the water circulation base 21, and the circulating water outlet pipeline 31 is connected between the outer tube 13 and the insulation tube 14 through the water circulation base 21. This structure effectively ensures that the non-working part of the needle body 1 is kept at a low temperature during the ablation process, avoiding burns to the patient's healthy tissue.

[0068] like Figure 2 As shown, the housing 23 of the handle 2 includes a front shell 231, a main shell 232, and a rear shell 233. Specifically, the front shell 231, the rear shell 233, and the main shell 232 are all fixed together by gluing at the seams; the water circulation base 21 is fixed inside the front shell 231, the circuit board assembly 22 and the induction heating assembly 24 are fixed inside the main shell 232, and the water circulation pipeline 3, the steam inlet pipeline 4, and the cable assembly 5 are fixed to the rear shell 233.

[0069] like Figure 2 、 Figure 3As shown, the water circulation base 21 includes a water inlet base 211, a water outlet base 212 and a cover plate 213. The water inlet base 211, the water outlet base 212 and the cover plate 213 are sequentially plugged in and assembled and fixed and sealed at the joints with glue. Specifically, the left sides of the water inlet base 211, the water outlet base 212 and the cover plate 213 all have left grooves, which respectively cooperate with the ends of the outer tube 12, the diversion tube 13 and the insulation tube 14 and are fixed and sealed at the joints with glue; there is a cavity between the water inlet base 211 and the water outlet base 212 and between the water outlet base 212 and the cover plate 213, and there is a top groove above the cavity, that is, the top of the water inlet base 211 and the water outlet base 212 has a top groove, and the top grooves of the water inlet base 211 and the water outlet base 212 are respectively connected to the circulating water inlet pipeline 32 and the circulating water outlet pipeline 31 of the water circulation pipeline 3.

[0070] like Figure 2 As shown, the induction heating assembly 24 includes a transfer tube 241, a front fixing bracket 242, a coil 243, an induction heating assembly and a rear fixing bracket 246. The joints of the front fixing bracket 242 and the rear fixing bracket 246 are fixed with glue, and the induction heating assembly and the coil 243 are coaxially sleeved inside from the outside to the inside. The induction heating assembly includes a coil 245 and a coil fixing seat 244. The coil 245 is wound on the coil fixing seat 244 and fixed with glue. This structure can ensure that the coil 245 and the coil 243 are in a relatively static state, and maximize the stability and consistency of the power output during ablation. The front fixing bracket 242 and the rear fixing bracket 246 are wrapped with a circulating water outlet pipe 31. After the circulating water passes through the needle body 1, it flows out of the handle 2 from this section of the spirally wound circulating water outlet pipe 31, taking away the excess heat outside the induction heating assembly 24, ensuring that the outside of the handle 2 is in a low temperature state, and avoiding burns when the operator holds the instrument. The front end of the coil 243 is connected to the steam pipe 15 through the adapter tube 241, and the rear end is connected to the steam water inlet pipe 4. The cable assembly 5 includes a signal line 51 and a power line 52. The coil 245 is welded to the power line 52 in the cable assembly 5 and the welds are insulated.

[0071] like Figure 2 As shown, the circuit board assembly 22 includes a circuit board 221 and a thermocouple 222. Specifically, the circuit board 221 is inserted into the closed slot formed by the main shell 232 and the front shell 231, so that the circuit board is reliably fixed; a signal line connector is provided on the circuit board 221 for inserting the signal line 51 in the cable assembly 5; one end of the thermocouple 222 is welded to the circuit board 221, and the other end is fixed to the outlet end of the coil 243 by laser welding, which is used to monitor the temperature of the coil outlet end in real time and accurately control the ablation effect. Preferably, the number of thermocouples 222 provided is two.

[0072] Workflow: Connect the ablation needle's water circulation pipe 3, steam water inlet pipe 4 and cable assembly 5 to the device. Under the guidance of medical imaging, puncture the ablation needle percutaneously to the lesion. Control the device to start the circulating water. The circulating water circulation path is as follows: Figure 5 As shown, the surface of the needle body 1 and the handle 2 are in a low-temperature state. The control device delivers sterile water to the coil 243 through the steam inlet pipe 4. At the same time, the device delivers high-frequency current to the coil 245 through the cable assembly 5. An alternating magnetic field is generated inside and outside the coil 245, forming an eddy current in the coil 243 and rapidly heating it up, instantly converting the sterile water inside into steam, which is output through the needle 11 to ablate the lesion. The steam delivery path is shown in FIG. Figure 6 shown.

[0073] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the scope of protection of the present invention.

Claims

1. A percutaneous steam ablation needle with water circulation, characterized in that: include: A needle head, wherein a receiving cavity is provided in the needle head, and a steam output channel is provided on the needle head and passes through and communicates with the receiving cavity; A steam pipe, the steam pipe comprising a steam connecting section, a steam main section and a steam tail section connected in sequence; the steam connecting section extends into and communicates with the receiving chamber; A handle, the handle comprising a handle housing and a steam generating portion located therein, the steam tail section extending into and fixed in the handle housing, the output end of the steam generating portion being in communication with the steam tail section; A water circulation part, which includes a circulating water inlet pipeline, a circulating needle body section and a circulating water outlet pipeline that are connected in sequence, the axial head end of the circulating needle body section is fixed to the needle head, the axial tail end of the circulating needle body section is fixed and extends into the handle shell, and the water circulation channel in the circulating needle body section is sleeved on the steam main section, and the circulating water in the circulating needle body section is configured to absorb and take away the heat emitted to the outside by the steam in the steam main section; and at least part of the circulating water outlet pipeline is arranged between the steam generating part and the handle shell, and this part of the circulating water outlet pipeline is configured to receive and take away the heat emitted by the steam generating part toward the handle shell.

2. The percutaneous steam ablation needle with water circulation according to claim 1, characterized in that: The water circulation unit also includes a water circulation base; The water circulation base is fixed in the handle housing, and a water inlet channel and a water outlet channel are provided in the water circulation base; the steam tail section, the axial tail end of the circulation needle section, the output end of the circulation water inlet pipeline and the input end of the circulation water outlet pipeline are respectively fixed to the water circulation base; and the water inlet channel is respectively connected to the input end of the water circulation channel and the output end of the circulation water inlet pipeline, and the water outlet channel is respectively connected to the output end of the water circulation channel and the input end of the circulation water outlet pipeline.

3. The percutaneous steam ablation needle with water circulation according to claim 2, characterized in that: The circulation needle body section includes a water circulation seal and an outer tube, a shunt tube and a heat preservation tube which are sequentially sleeved and spaced apart. The first end of the outer tube in the axial direction is fixed to the needle, and the second end of the outer tube in the axial direction is fixed to the handle housing and / or the water circulation base; The first end of the insulation pipe in the axial direction is connected to the water circulation seal, and the water circulation seal seals the gap between the first end of the insulation pipe in the axial direction and the outer pipe, and the second end of the insulation pipe in the axial direction is fixed to the water circulation base; A reflux gap is formed between the first end of the diverter pipe in the axial direction and the water circulation seal, and the second end of the diverter pipe in the axial direction is fixed to the water circulation base.

4. The percutaneous steam ablation needle with water circulation according to claim 3, characterized in that: The water circulation base includes a water inlet base, a water outlet base and a cover plate; The water inlet base is fixedly connected to the handle housing, and is provided with an outer tube through groove corresponding to the outer tube and a first mounting through groove communicating with the outer tube through groove. The water inlet base is also provided with a water inlet through groove communicating with the first mounting through groove, and the outer tube extends into and is fixed to the outer tube through groove; The water outlet base is fixed to the first mounting groove, and the water outlet base is provided with a diversion pipe groove corresponding to the diversion pipe and a second mounting groove connected to the diversion pipe groove, and the water outlet base is provided with a water outlet groove connected to the second mounting groove, and the diversion pipe extends into and is fixed to the diversion pipe groove; wherein the first mounting groove, the water outlet base, the diversion pipe, and the water inlet groove cooperate to form the water inlet channel; The cover plate is fixed to the second mounting groove, and an insulation pipe groove corresponding to the insulation pipe is provided on the cover plate, and the insulation pipe extends into and is fixed to the insulation pipe groove; wherein, the second mounting groove, the cover plate, the insulation pipe, and the water outlet groove cooperate to form the water outlet channel.

5. The percutaneous steam ablation needle with water circulation according to claim 1, characterized in that: It also includes a steam seal, which is arranged between the steam pipe and the circulation needle segment, and is configured to prevent steam from entering the gap between the steam pipe and the circulation needle segment from the connection between the steam connecting segment and the receiving cavity.

6. The percutaneous steam ablation needle with water circulation according to claim 1, characterized in that: The steam output channel includes a plurality of pore groups arranged at intervals along the circumferential direction, and each of the pore groups includes a plurality of pores arranged at intervals along the axial direction.

7. The percutaneous steam ablation needle with water circulation according to claim 1, characterized in that: The steam generating part includes a steam generating bracket and a steam generating component; The steam generating bracket is fixed in the handle housing and is divided into a steam generating chamber located in the steam generating bracket and a circulating water outlet chamber located between the steam generating bracket and the handle housing, and the circulating water outlet chamber is arranged around the steam generating chamber; The steam generating component is arranged in the steam generating chamber, and the output end of the steam generating component is communicated with the steam tail section; the circulating water outlet pipeline is wound and arranged in the circulating water outlet chamber.

8. The percutaneous steam ablation needle with water circulation according to claim 7, characterized in that: The steam generating assembly includes a coil, an induction heating assembly, and a transfer tube; The coil is fixed in the steam generating chamber, and the input end of the coil is connected to the steam inlet pipe, and the output end of the coil is connected to the steam tail section through the adapter pipe; The induction heating component is fixed in the steam generating chamber and sleeved on the coil. The induction heating component is configured to generate an alternating magnetic field to form eddy currents in the coil and heat it.

9. The percutaneous steam ablation needle with water circulation according to claim 8, characterized in that: It also includes a temperature sensing unit, and the temperature measuring end of the temperature sensing unit is arranged at the output end of the coil.

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