Steam ablation system

Abstract

The utility model relates to the field of minimally invasive surgery technology, and specifically discloses a steam ablation system, which comprises a handle, a lead-in sheath, a puncture assembly and a host. The lead-in sheath is arranged on the handle and has a first channel; the puncture assembly has a steam channel, is arranged in the first channel and can pass out of the distal end of the lead-in sheath; and the host is used for generating steam. The inlet of the steam channel and the outlet of the host are in communication, and the steam can be sprayed out of the outlet of the steam channel. With the above structure, the operator can pass the lead-in sheath into the patient's body through the urethra by holding the handle, then operate the puncture assembly to pass out of the lead-in sheath and enter the tissue to be operated on, the steam provided by the host is sprayed out through the steam channel, thereby accurately ablates the tissue to be operated on, avoids removing the entire gland, reduces the influence of the operation on the patient and improves the patient's quality of life after the operation.

Description

Technical Field

[0001] This utility model relates to the field of minimally invasive surgery technology, and in particular to a steam ablation system. Background Technology

[0002] Benign prostatic hyperplasia (BPH) is a common disease among middle-aged and elderly men. The enlarged prostate gland compresses the urethra, leading to a series of urinary problems such as urinary frequency, urgency, weak urine stream, and incomplete emptying. These symptoms severely impact a patient's quality of life, and without timely treatment, can lead to many serious complications (such as acute urinary retention, kidney stones, and renal insufficiency), and may even endanger the patient's life.

[0003] Traditional transurethral resection of the prostate (TURP) is an invasive surgical procedure that has been widely used since the 1920s. Currently, the most common methods are electrocautery and laser resection. However, because these methods completely remove the gland and cause tissue damage during the procedure, many patients experience other problems, such as loss of sexual function, severely impacting their quality of life.

[0004] Therefore, it is urgent to study a steam ablation system to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a steam ablation system that uses steam provided by the main unit to precisely ablate the tissue to be operated on, avoiding the removal of the entire gland, reducing the impact of surgery on patients, and improving their postoperative quality of life.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The steam ablation system includes:

[0008] handle;

[0009] An inlet sheath, the inlet sheath being disposed on the handle, the inlet sheath having a first channel;

[0010] A puncture assembly having a steam channel, the puncture assembly being disposed in the first channel and capable of penetrating from the distal end of the inlet sheath;

[0011] The host is used to generate steam, the inlet of the steam channel is connected to the outlet of the host, and the steam can be ejected from the outlet of the steam channel.

[0012] As an optional technical solution for a steam ablation system, the main unit includes:

[0013] A steam container, wherein the steam container is provided with a heating channel, the steam container is disposed inside the handle, and is used to heat the liquid and form steam, wherein the outlet of the heating channel and the inlet of the steam channel are connected; the liquid is heated by at least one of magnetic induction heating, resistance heating and radio frequency heating;

[0014] A liquid supply assembly, wherein the outlet of the liquid supply assembly is connected to the inlet of the heating channel.

[0015] As an optional technical solution for a vapor ablation system, the liquid supply component includes:

[0016] A water supply container having a water storage chamber and an outlet and an inlet communicating with the water storage chamber;

[0017] A pusher is slidably disposed within the water storage cavity, and the movement of the pusher can push the liquid in the water storage cavity to flow out from the outlet of the water supply container.

[0018] As an optional technical solution for a vapor ablation system, the vapor ablation system further includes a cooling element for storing coolant; the inlet sheath has a cooling channel inside, the cooling channel is arranged parallel to the first channel, and the cooling channel is connected to the cavity of the cooling element.

[0019] As an optional technical solution for a steam ablation system, the puncture assembly includes a puncture member, the steam channel is disposed inside the puncture member, and the side wall of the puncture member is provided with an outlet hole communicating with the steam channel;

[0020] And / or, the distal end of the inlet sheath is provided with a first opening communicating with the first channel, the puncture assembly can pass through the inlet sheath from the first opening, and the inlet sheath is an adjustable bendable catheter.

[0021] As an optional technical solution for a vapor ablation system, the distal portion of the puncture member that protrudes from the guide sheath bends towards the proximal end of the guide sheath;

[0022] Alternatively, the portion of the puncture member extending beyond the distal end of the inlet sheath may bend toward the distal end of the inlet sheath.

[0023] As an optional technical solution for a steam ablation system, the extension direction of the nozzle is inclined towards the proximal end of the puncture member along the axis away from the puncture member.

[0024] As an optional technical solution for a steam ablation system, the puncture element is provided in a plurality of parts, and the side wall of the inlet sheath is provided with a plurality of second openings that connect to the first channel. The plurality of puncture elements can pass through the inlet sheath from the corresponding second openings, and the plurality of puncture elements are dispersed after passing through.

[0025] As an optional technical solution for a steam ablation system, the puncture assembly includes a puncture element and a working tube. The puncture element has a second channel inside, and the working tube passes through the second channel and can exit from the distal opening of the second channel. The steam channel is located inside the working tube, and the side wall and / or distal end of the working tube are provided with an outlet hole communicating with the steam channel.

[0026] As an optional technical solution for a steam dissipation system, the distal end of the working pipe is provided with a protrusion. The protrusion has a spherical structure and an internal cavity. The protrusion is provided with a plurality of ejection holes that communicate with the cavity. The axis of the ejection holes is perpendicular to the axis of the working pipe.

[0027] Alternatively, the distal end of the working tube is provided with a protrusion, and the outer diameter of the protrusion first increases and then decreases along the direction from the proximal end to the distal end to form an expansion part and a contraction part. The protrusion has a receiving cavity inside, and the expansion part of the protrusion is provided with a plurality of ejection holes communicating with the receiving cavity.

[0028] The beneficial effects of this utility model are as follows:

[0029] This invention provides a steam ablation system in which an introductory sheath is inserted into the patient's body through the urethra via a handheld handle. Then, a puncture component is inserted through the introductory sheath and into the tissue to be operated on. Steam provided by the main unit is sprayed out through the steam channel, thereby precisely ablating the tissue to be operated on, avoiding the removal of the entire prostate, reducing the impact of surgery on the patient, and improving the patient's postoperative quality of life. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the steam ablation system in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the driving component in an embodiment of this utility model;

[0032] Figure 3 This is a schematic diagram of the handle structure in an embodiment of the present utility model;

[0033] Figure 4 This is a schematic diagram of the structure of the puncture member bending distally in an embodiment of this utility model;

[0034] Figure 5 This is a schematic diagram of the puncture member bending proximally in an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure of the puncture member with a conical end in an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the puncture member having an inclined surface in an embodiment of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure of the eight puncture components in the embodiment of this utility model;

[0038] Figure 9 This is a schematic diagram of the structure of the six puncture components in the embodiment of this utility model;

[0039] Figure 10 This is a schematic diagram of the structure of the two puncture components in an embodiment of this utility model;

[0040] Figure 11 This is a schematic diagram of the spiral-shaped puncture component in an embodiment of the present invention;

[0041] Figure 12 This is a schematic diagram of the puncture device and the working tube in an embodiment of this utility model;

[0042] Figure 13 This is a schematic diagram of the structure of the working tube having a spherical protrusion in an embodiment of this utility model;

[0043] Figure 14 This is a schematic diagram of the expansion and contraction sections of the working tube in an embodiment of this utility model;

[0044] Figure 15 This is a schematic diagram of the structure of the working tube with a spray hole in a certain embodiment of the present invention.

[0045] In the picture:

[0046] 1000, prostate;

[0047] 100. Main unit; 110. Steam container; 120. Wire; 130. Liquid supply assembly; 131. Water supply container; 132. Pushing component; 140. Drive assembly; 141. Drive base; 1411. Sliding rod; 1412. Snap-fit ​​component; 142. Drive component; 143. Lead screw; 144. Moving component; 150. Housing; 160. Power supply; 170. Controller; 180. First pipeline;

[0048] 200, Handle; 210, Inlet sheath; 211, Second opening; 220, Piercing element; 221, Inclined surface; 230, Working tube; 231, Ejection hole; 232, Protrusion; 234, Steam passage; 2321, Receiving cavity; 2322, Expansion section; 2323, Contraction section; 241, First switch; 242, Second switch;

[0049] 300, Cooling component; 310, Second pipeline. Detailed Implementation

[0050] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0051] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0053] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0054] like Figures 1 to 15As shown, this embodiment provides a steam ablation system. The operator holds a handle 200, which is connected to the proximal end of an insertion sheath 210. The operator controls the insertion sheath 210 to enter the patient's body through the urethra. Once the insertion sheath 210 is in position, the puncture component extends from the distal end of the insertion sheath 210 and punctures the tissue to be ablated. Steam at a preset temperature is then released to heat the tissue and cause it to denature and necrose, thus completing the ablation. In this embodiment, the tissue to be ablated can be hyperplastic prostate tissue 1000. After ablation, excess hyperplastic tissue can be removed, and the reduced volume of the prostate 1000 reduces the pressure on the urethra, thus solving the problem of prostate hyperplasia. In other embodiments, the tissue to be ablated can be tumor, cancer, lesion, or other tissue.

[0055] The proximal end is the end closer to the operator, and the distal end is the end closer to the tissue to be operated on.

[0056] The steam ablation system includes a handle 200, an insertion sheath 210, a puncture assembly, and a main unit 100. The insertion sheath 210 is located on the handle 200 and has a first channel; the puncture assembly has a steam channel 234, is located in the first channel, and can pass through the distal end of the insertion sheath 210; the main unit 100 is used to generate steam, the inlet of the steam channel 234 is connected to the outlet of the main unit 100, and steam can be ejected from the outlet of the steam channel 234.

[0057] The temperature of the steam can be 60℃-140℃.

[0058] The above setup allows the insertion sheath 210 to be inserted into the patient's body through the urethra via the handheld handle 200. Then, the puncture component is inserted through the insertion sheath 210 and into the tissue to be operated on. The steam provided by the main unit 100 is sprayed out through the steam channel 234, thereby precisely ablating the tissue to be operated on, avoiding the removal of the entire gland, reducing the impact of the surgery on the patient, and improving the patient's postoperative quality of life.

[0059] like Figures 1 to 3 As shown, regarding the structure of the main unit 100, in this embodiment, the main unit 100 includes a steam container 110 and a liquid supply assembly 130. The steam container 110 is provided with a heating channel and is disposed within the handle 200. It is used to heat the liquid and form steam. The outlet of the heating channel is connected to the inlet of the steam channel 234. The liquid is heated by at least one of magnetic induction heating, resistance heating, and radio frequency heating. The outlet of the liquid supply assembly 130 is connected to the inlet of the heating channel. The liquid supply assembly 130 and the handle 200 are separately configured to reduce the weight of the handle 200 and improve operational convenience.

[0060] The liquid supply assembly 130 includes a water supply container 131 and a pusher 132. The water supply container 131 has a water storage chamber and an outlet and an inlet communicating with the water storage chamber. The pusher 132 is slidably disposed within the water storage chamber, and its movement can push the liquid in the water storage chamber to flow out from the outlet of the water supply container 131. The outlet of the water supply container 131 and the inlet of the heating channel are connected by a first pipe 180. In this embodiment, the liquid outlet of the liquid supply assembly 130 is the outlet of the water supply container 131. The above arrangement enables quantitative liquid output, making the amount of steam during the surgical procedure controllable, thereby improving surgical accuracy and success rate. The water outlet chamber of the water supply container 131 contains distilled water, pure water, or physiological saline.

[0061] To improve the automation level of water supply, the main unit 100 also includes a drive assembly 140, the output end of which is connected to the pusher 132. The main unit 100 includes a housing 150, and the water supply container 131 and the drive assembly 140 are both located inside the housing 150. Specifically, the drive assembly 140 includes a drive base 141, a drive member 142, a lead screw 143, and a moving member 144. The drive base 141 is located in the housing 150, the moving member 144 is slidably mounted on the drive base 141, and the moving member 144 has a threaded hole. The lead screw 143 is rotatably mounted on the drive base 141 and is threadedly engaged with the moving member 144. The drive member 142 is located in the drive base 141, and its output end is connected to the lead screw 143. During the movement of the moving member 144, it can drive the pusher 132 to move the pusher 132 closer to the outlet of the water storage chamber. The drive base 141 is provided with a sliding rod 1411, and the moving part 144 is provided with a sliding channel, through which the sliding rod 1411 passes. The drive part 142 can be a servo motor.

[0062] In this embodiment, the liquid supply assembly 130 can be a syringe. The drive base 141 is provided with a snap-fit ​​member 1412, and the syringe is snapped into the snap-fit ​​member 1412. During the movement of the moving member 144, the syringe's push member 132 can be moved.

[0063] The main unit 100 includes a power supply 160, which is located inside the enclosure 150. It can be connected to a normal external power supply 160 and can perform voltage and current conversion, such as converting AC to DC, to meet power requirements.

[0064] The main unit 100 includes a controller 170. The controller 170 controls the cooling component 300 and the drive component 142. The main unit 100 includes a display module and a protection module. The display module displays information such as the remaining liquid level in the syringe. The protection module detects whether the temperature is within the normal range. It is worth noting that the usage of the protection module is well known to those skilled in the art and will not be described in detail here.

[0065] Resistance heating primarily involves current flowing through a metal resistor, causing the resistor to heat up and transfer the heat to the liquid. Electromagnetic induction heating mainly involves a conductor 120 carrying alternating current wound around a metal component to heat the component, which then transfers the heat to the liquid. Radio frequency heating primarily involves alternating current passing through the conductor 120 to generate radio frequency, directly heating the liquid.

[0066] The heating structure of this application will now be described in detail. In the first embodiment of this invention, resistance heating is used, and a metal heating wire is disposed in the cavity of the steam container 110. When the heating wire is energized, it generates heat to heat the liquid flowing through the heating wire.

[0067] In the second embodiment of this example, radio frequency heating is used. The steam container 110 is made of non-metallic material, and a wire 120 is wrapped around the outer periphery of the steam container 110. When the wire 120 is energized, it generates radio frequency to the liquid in the steam container 110 to complete the heating.

[0068] In the third embodiment of this invention, electromagnetic induction heating and radio frequency heating are used. A metal component is disposed in the cavity of a non-metallic steam container 110. Liquid flows through the gap between the metal component and the steam container 110. A wire 120 is wound around the outer periphery of the metal component. When the wire 120 is energized, it generates magnetic force to cut the metal component and heats it, thereby heating the liquid flowing through the metal component. At the same time, the wire 120 can perform radio frequency heating on the liquid. In one embodiment of this invention, the wire 120 can be located inside the steam container 110 and wound around the outer periphery of the metal component; in another embodiment of this invention, the wire 120 can be wound around the outer periphery of both the steam container 110 and the metal component.

[0069] In the fourth embodiment of this example, electromagnetic induction heating, radio frequency heating, and resistance heating are used. A metal component is provided in the cavity of a non-metallic steam container 110. Liquid flows through the gap between the metal component and the steam container 110 or through the internal space of the metal component. The metal component acts as a resistor and heats up after being connected to an external power source 160. A wire 120 is wrapped around the outer periphery of the metal component. When the wire 120 is energized, it generates magnetic force to cut the metal component and heats up the metal component, thereby heating the liquid flowing through the metal component. At the same time, the wire 120 can perform radio frequency heating on the liquid.

[0070] In the fifth embodiment of this example, electromagnetic induction heating and radio frequency heating are used. A wire 120 is wrapped around the outer periphery of the metal steam container 110. When the wire 120 is energized, it generates magnetic cutting force to cut the steam container 110 and heats the steam container 110, thereby heating the liquid flowing through the steam container 110; at the same time, the wire 120 can perform radio frequency heating on the liquid.

[0071] In the sixth embodiment of this example, electromagnetic induction heating and radio frequency heating are used. A metal steam container 110 is used, and a metal part is provided in the cavity of the steam container 110. Liquid flows through the gap between the metal part and the steam container 110. A wire 120 is wound around the outer periphery of the steam container 110. When the wire 120 is energized, it generates magnetic cutting force on both the steam container 110 and the metal part, causing both the steam container 110 and the metal part to heat up, thereby heating the liquid. At the same time, the wire 120 wound around the outer periphery of the steam container 110 can generate radio frequency heating for the liquid inside the steam container 110.

[0072] In the seventh embodiment of this example, electromagnetic induction heating, radio frequency heating, and resistance heating are used. A metal steam container 110 is used, and a metal component is disposed in the cavity of the steam container 110. Liquid flows through the gap between the metal component and the steam container 110. A wire 120 is wound around the outer periphery of the steam container 110. The metal component acts as a resistor and heats up after being connected to an external power source 160. When the wire 120 is energized, it generates magnetic cutting force on both the steam container 110 and the metal component, causing both the steam container 110 and the metal component to heat up, thereby heating the liquid. At the same time, the wire 120 wound around the outer periphery of the steam container 110 can generate radio frequency heating for the liquid inside the steam container 110.

[0073] The metal component can be a resistance wire, which generates heat when energized to heat the liquid flowing through it.

[0074] In some embodiments, the handle 200 is provided with a first switch 241 for ejecting the piercing member 220 and a second switch 242 for releasing steam. By controlling the first switch 241, the piercing member 220 can be controlled to exit the guide sheath 210. By controlling the second switch 242, the power, water flow rate, or the on / off state of the working tube 230 can be controlled to control the steam ejection and cessation.

[0075] During use, the steam dissipates heat to the infusion sheath 210 during the transfer process, causing its temperature to rise. Since the infusion sheath 210 passes through the urethra to the surgical tissue, tissues outside the surgical tissue are also susceptible to damage from the high temperature of the infusion sheath 210. To reduce the temperature of the infusion sheath 210, the steam ablation system also includes a cooling component. This cooling component includes a cooling element 300 containing coolant. The infusion sheath 210 has a cooling channel that is parallel to a first channel and connected to the cooling element 300. The internal cavity of the cooling element 300 is connected to the cooling channel via a second conduit 310. The cooling channel effectively cools the infusion sheath 210, preventing damage to tissues outside the surgical tissue.

[0076] In some embodiments, the cooling channel may also wrap around the periphery of the first channel.

[0077] like Figure 4 As shown, regarding the structure of the puncture assembly, in some embodiments, the puncture assembly includes a puncture member 220, a steam channel 234 disposed inside the puncture member 220, and an outlet hole 231 communicating with the steam channel 234 on the side wall of the puncture member 220. This structure is simple and can eject steam in a direction perpendicular to the axis of the puncture member 220, thus increasing the surgical range.

[0078] The intubation sheath 210 is an adjustable-bend catheter. In this embodiment, the distal end of the intubation sheath 210 has a first opening through which the puncture member 220 can pass. This configuration allows the intubation sheath 210 to bend at its distal end after insertion into the body, enabling the puncture member 220 to pass through the first opening and enter the tissue to be operated on. The method of adjusting the bending of the intubation sheath 210 is well known to those skilled in the art and will not be described in detail here.

[0079] like Figure 4 and Figure 5 As shown, to adapt to different surgical sites, the bending angle of the puncture member 220 after exiting the guide sheath 210 can be adaptively adjusted. In some embodiments, the distal portion of the puncture member 220 after exiting the guide sheath 210 bends towards the proximal end of the guide sheath 210. In some embodiments, the distal portion of the puncture member 220 after exiting the guide sheath 210 bends towards the distal end of the guide sheath 210. This bending direction setting allows the puncture member 220 to penetrate the surgical tissue from different angles after the guide sheath 210 enters the body, thereby achieving more precise treatment. The puncture member 220 can be preset at an angle or adjusted according to the track within the guide sheath 210.

[0080] like Figure 6 and Figure 7 As shown, to facilitate the puncture of the lateral wall of the urethra and entry into the diseased prostate tissue 1000, the end of the puncture member 220 is tapered. In some embodiments, the end of the puncture member 220 is provided with a plurality of inclined surfaces 221 in the circumferential direction, the inclined surfaces 221 being inclined to the axis of the puncture member 220 in the direction toward the distal end. In other embodiments, the shape of the end of the puncture member 220 can be constrained by other structures, as long as the end of the puncture member 220 forms a spike-like structure.

[0081] The extension direction of the nozzle 231 is inclined towards the proximal end of the puncture member 220 along the axis away from the puncture member 220. The aforementioned inclined nozzle 231, with its outlet inclined towards the proximal end, makes the angle between the outlet direction of the nozzle 231 and the forward direction of the working tube 230 greater than 90° during the extension of the puncture member 220, effectively preventing tissue from entering the nozzle 231 and avoiding blockage of the nozzle 231; at the same time, the inclined nozzle 231 increases the steam range and covers a wider area.

[0082] The puncture element 220 is provided in several parts, and the side wall of the inlet sheath 210 is provided with several second openings 211 that connect to the first channel. Several puncture elements 220 can pass through the inlet sheath 210 through the corresponding second openings 211. After the several puncture elements 220 pass through, they are dispersed.

[0083] like Figure 8 As shown, in the first embodiment of this example, there are eight puncture members 220, arranged in groups of two, forming four groups of puncture members 220. These four groups of puncture members 220 are spaced apart along the proximal to distal direction, with the two puncture members 220 in each group being symmetrical about the plane passing through the axis of the puncture member 220. After exiting the guide sheath 210, the puncture member 220 forms an arc-shaped structure, and the plane containing the puncture member 220 is perpendicular to the axis of the guide sheath 210.

[0084] like Figure 9 As shown, in the second embodiment of this example, six puncture members 220 are provided, with two puncture members 220 forming a group, forming three groups of puncture members 220. Along the direction from proximal to distal, the three groups of puncture members 220 are spaced apart, and the two puncture members 220 in each group are symmetrical about the plane passing through the axis of the guide sheath 210. After exiting the guide sheath 210, the puncture member 220 forms a straight portion and a bent portion. The straight portion is perpendicular to the axis of the guide sheath 210, and the bent portion is located at the end of the straight portion and bends towards the distal end of the guide sheath 210.

[0085] like Figure 10 As shown, in the third embodiment of this example, there are two puncture members 220, which are symmetrical about the plane of the axis passing through the guide sheath 210. After the puncture member 220 passes through the guide sheath 210, it forms an arc-shaped structure and bends toward the distal end of the guide sheath 210.

[0086] In some embodiments, the plurality of puncture elements 220 are arranged in an asymmetrical manner.

[0087] like Figure 11 As shown, in some embodiments, the puncture member 220 is provided, and the puncture member 220 extends out of the guide sheath 210 and is spiral in shape. Specifically, along the axial direction of the guide sheath 210, the outer diameter of the spiral portion of the puncture member 220 first increases and then decreases.

[0088] like Figure 12As shown, the puncture assembly includes a puncture member 220 and a working tube 230. The puncture member 220 has a second channel inside, and the working tube 230 passes through the second channel and can exit from the distal end of the second channel. A steam channel 234 is disposed inside the working tube 230, and the side wall and / or distal end of the working tube 230 are provided with an outlet hole 231 communicating with the steam channel 234. Specifically, in one embodiment of this example, the side wall of the working tube 230 is provided with an outlet hole 231 communicating with the steam channel 234. In a second embodiment of this example, the distal end of the working tube 230 is provided with an outlet hole 231 communicating with the steam channel 234. In a third embodiment of this example, both the side wall and the distal end of the working tube 230 are provided with outlet holes 231 communicating with the steam channel 234.

[0089] like Figure 13 As shown, to expand the surgical area, in some embodiments, the distal end of the working tube 230 is provided with a protrusion 232. The protrusion 232 has a spherical structure and an internal accommodating cavity 2321. The protrusion 232 has a plurality of ejection holes 231 communicating with the accommodating cavity 2321, and the axis of the ejection holes 231 is perpendicular to the axis of the working tube 230. The above arrangement allows the ejection holes 231 to be evenly distributed at intervals on the outer periphery of the protrusion 232, thereby allowing steam to be ejected in a spherical structure; and it can prevent the ejection holes 231 from being blocked by tissue during the extension of the working tube 230; in addition, the spherical structure of the protrusion 232 can effectively reduce the damage to tissues during the extension of the working tube 230.

[0090] like Figure 14 As shown, in some embodiments, the distal end of the working tube 230 is provided with a protrusion 232. Along the direction from the proximal end to the distal end, the outer diameter of the protrusion 232 first increases and then decreases to form an expansion portion 2322 and a contraction portion 2323. The protrusion 232 has an accommodating cavity 2321 inside, and the expansion portion 2322 of the protrusion 232 is provided with a plurality of ejection holes 231 communicating with the accommodating cavity 2321. This arrangement allows the ejection holes 231 to be evenly distributed at intervals on the outer periphery of the protrusion 232, thereby allowing steam to be ejected in an annular structure; and it can prevent the ejection holes 231 from becoming blocked during the extension of the working tube 230; in addition, the contraction portion 2323 can effectively reduce damage to tissues during the extension of the working tube 230.

[0091] like Figure 15As shown, to reduce the possibility of clogging of the ejector holes 231, in this embodiment, a protrusion 232 is provided at the distal end of the working tube 230. The protrusion 232 has a spherical structure and an internal accommodating cavity 2321. Along the direction from the proximal end to the distal end, a plurality of ejector holes 231 communicating with the accommodating cavity 2321 are provided between the starting position of the protrusion 232 and the maximum outer diameter of the protrusion 232. The above arrangement allows the ejector holes 231 to be evenly distributed at intervals on the outer periphery of the protrusion 232, thereby allowing steam to be ejected in an annular structure; and it can better avoid clogging of the ejector holes 231 during the extension of the working tube 230; in addition, the spherical structure of the protrusion 232 can effectively reduce the damage to the tissue during the extension of the working tube 230.

[0092] In embodiments with a working tube 230, to ensure that the puncture member 220 can smoothly penetrate the tissue, in some embodiments, the end of the puncture member 220 has a bevel 221, with the intersection of the bevel 221 and the axis of the puncture member 220 as the vertex, and the angle between the bevel 221 and the axis of the puncture member 220 along the distal direction of the puncture member 220 is less than 90°. This configuration results in the distal end of the puncture member 220 forming a spike-like structure, facilitating insertion into the tissue to be operated on.

[0093] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A steam ablation system, characterized in that, include: Handle (200); An inlet sheath (210) is disposed on the handle (200), the inlet sheath (210) having a first channel; A puncture assembly having a steam channel (234), the puncture assembly being disposed in the first channel and being able to pass through the distal end of the inlet sheath (210); The host (100) is used to generate steam. The inlet of the steam channel (234) is connected to the outlet of the host (100), and the steam can be ejected from the outlet of the steam channel (234). The steam ablation system also includes a cooling element (300) for storing coolant. The inlet sheath (210) has a cooling channel inside. The cooling channel is arranged parallel to the first channel and is connected to the cavity of the cooling element (300).

2. The steam ablation system according to claim 1, characterized in that, The host (100) includes: A steam container (110) is provided with a heating channel. The steam container (110) is located inside the handle (200) and is used to heat the liquid and form steam. The outlet of the heating channel is connected to the inlet of the steam channel (234). The liquid is heated by at least one of magnetic induction heating, resistance heating and radio frequency heating. A liquid supply assembly (130) is provided, wherein the outlet of the liquid supply assembly (130) is connected to the inlet of the heating channel.

3. The steam ablation system according to claim 2, characterized in that, The liquid supply assembly (130) includes: A water supply container (131) having a water storage cavity and an outlet and an inlet communicating with the water storage cavity; A pusher (132) is slidably disposed in the water storage cavity. During the movement of the pusher (132), the liquid in the water storage cavity can be pushed out of the outlet of the water supply container (131).

4. The steam ablation system according to claim 1, characterized in that, The puncture assembly includes a puncture member (220), the steam channel (234) is disposed inside the puncture member (220), and the side wall of the puncture member (220) is provided with an outlet hole (231) communicating with the steam channel (234). And / or, the distal end of the inlet sheath (210) is provided with a first opening communicating with the first channel, and the puncture assembly can pass through the inlet sheath (210) from the first opening, wherein the inlet sheath (210) is an adjustable bendable catheter.

5. The steam ablation system according to claim 4, characterized in that, The portion of the puncture member (220) that extends beyond the distal end of the inlet sheath (210) bends toward the proximal end of the inlet sheath (210); Alternatively, the portion of the puncture member (220) extending beyond the distal end of the inlet sheath (210) bends toward the distal end of the inlet sheath (210).

6. The steam ablation system according to claim 4, characterized in that, The extension direction of the ejection hole (231) is inclined towards the proximal end of the puncture member (220) along the axis away from the puncture member (220).

7. The steam ablation system according to claim 4, characterized in that, The puncture member (220) is provided in a plurality of manners. The side wall of the inlet sheath (210) is provided with a plurality of second openings that connect to the first channel. The plurality of puncture members (220) can pass through the inlet sheath (210) through the corresponding second openings. The plurality of puncture members (220) are dispersed after passing through.

8. The steam ablation system according to claim 1, characterized in that, The puncture assembly includes a puncture element (220) and a working tube (230). The puncture element (220) has a second channel inside. The working tube (230) passes through the second channel and can exit from the distal opening of the second channel. The steam channel (234) is located inside the working tube (230). The side wall and / or distal end of the working tube (230) are provided with an outlet hole (231) communicating with the steam channel (234).

9. The steam ablation system according to claim 8, characterized in that, The distal end of the working tube (230) is provided with a protrusion (232), which has a spherical structure and an internal cavity (2321). The protrusion (232) is provided with a plurality of ejection holes (231) communicating with the cavity (2321). The axis of the ejection holes (231) is perpendicular to the axis of the working tube (230). Alternatively, the distal end of the working tube (230) is provided with a protrusion (232). Along the direction from the proximal end to the distal end, the outer diameter of the protrusion (232) first increases and then decreases to form an expansion portion (2322) and a contraction portion (2323). The protrusion (232) has a receiving cavity (2321) inside. The expansion portion (2322) of the protrusion (232) is provided with a plurality of ejection holes (231) communicating with the receiving cavity (2321).

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