Minimally invasive steam probe and treatment equipment for tumor treatment

Abstract

The present invention provides a minimally invasive steam probe and treatment equipment for tumor treatment. The minimally invasive steam probe for tumor treatment includes a needle tube, a needle tip arranged at one end of the needle tube, and a handle arranged at the opposite end of the needle tube. The handle has a shunt portion close to the needle tube inside, and the end of the handle away from the needle tube has an inlet joint, and the side of the handle close to the needle tube end is provided with a reflux joint; the inlet end of the reflux joint is connected to the reflux outlet of the shunt portion; wherein the tube wall of the needle tube has a treatment section close to the needle tip and a heat insulation section away from the needle tip, and the needle tube has a central tube inside, and the central tube runs through the needle tube and the handle area to serve as a steam inflow channel. The minimally invasive steam probe for tumor treatment provided by the present invention has only heat exchange during the working process, and no substances enter human tissues. It is a purely physical and green treatment method.

Description

[0001] This application is a divisional application of application number 201810581886.1 and invention name “A minimally invasive steam probe and treatment device for tumor treatment”. Technical Field

[0002] The present invention belongs to the technical field of thermal ablation equipment for tumor treatment, and in particular relates to a minimally invasive steam probe and treatment equipment for tumor treatment. Background Art

[0003] The treatment of malignant tumors has long been a major challenge faced by the biomedical engineering community at home and abroad. People once regarded surgical resection, radiotherapy and chemotherapy as the most standard treatment methods. However, surgical resection causes great damage and limb disability, while the side effects caused by radiotherapy and chemotherapy often bring serious physical and mental pain to patients. All these factors inevitably reduce the survival rate and quality of life of patients. Therefore, seeking minimally invasive treatment methods that can effectively kill tumor cells while ensuring low damage and toxic side effects has become a major goal pursued by the clinical medicine and biomedical engineering communities.

[0004] At present, minimally invasive interventional physical therapy has become the forefront of development in related fields, and the corresponding technology has also become the commanding heights for developing the advanced medical equipment market. Among various efforts, high-temperature thermotherapy is a new physical therapy that has developed very rapidly in recent years. High-temperature thermotherapy is a physical therapy method that uses heating to kill tumors. It has been widely recognized by the clinical medical community because of its significant advantages such as precise efficacy and strong directionality. In particular, high-temperature thermotherapy technology has won the reputation of "green therapy" in tumor clinical practice because its side effects are far lower than conventional radiotherapy and chemotherapy, and has therefore been rapidly developed at home and abroad.

[0005] The current high-temperature thermal therapy equipment is mainly based on radio frequency and microwave, with complex structures and high costs, making it difficult to promote and popularize. For example, microwave thermal therapy machines need to generate complex circuits to generate microwave output. Since the electromagnetic field generated by itself will interfere with temperature measurement, the temperature measurement requirements are high, and protective devices must be used at the probe to avoid damage to normal tissues; other thermal therapy machines such as radio frequency and ultrasound are prone to overheating and pain when there is no cold water. All these thermal therapy machine probes use complex emission field effects, so the design of their cooling systems is relatively difficult, and it is difficult to determine the dosage when implementing thermal therapy. Summary of the invention

[0006] In view of the defects of the prior art, the present invention provides a minimally invasive steam probe and treatment equipment for tumor treatment, which can effectively solve the above problems.

[0007] The technical solution adopted by the present invention is as follows:

[0008] The present invention provides a minimally invasive steam probe for tumor treatment, comprising a needle tube, a needle tip arranged at one end of the needle tube, and a handle arranged at the opposite end of the needle tube; the handle (42) has a shunt portion close to the needle tube inside, the end of the handle away from the needle tube has an inlet joint, and the side of the handle close to the needle tube end is provided with a reflux joint; the inlet end of the reflux joint is connected to the reflux outlet of the shunt portion;

[0009] The wall of the needle tube has a treatment section close to the needle tip and a heat-insulating section away from the needle tip. The needle tube has a central tube that runs through the needle tube and the handle to serve as a steam flow channel.

[0010] The end of the central tube is connected to the steam outlet cavity, and the high-temperature steam transported through the central tube is condensed into liquid in the steam outlet cavity;

[0011] The inner wall surface of the needle tube located in the treatment section is circumferentially provided with inner wings, and a space gap is provided between the inner wings and the outer wall of the central tube of the treatment section to serve as a first reflux channel, the inlet of the first reflux channel is connected to the steam outlet chamber, and the condensed liquid in the steam outlet chamber (435) enters the first reflux channel;

[0012] The middle section of the central tube is provided with an outer sleeve coaxially covering the central tube, and the end of the outer sleeve is arranged in front of the inlet of the reflux joint to serve as the reflux inlet of the diversion part;

[0013] The space gap between the outer sleeve and the central tube serves as a second reflux channel, the outlet end of the first reflux channel is connected to the inlet end of the second reflux channel, and the outlet end of the second reflux channel is connected to the reflux inlet of the diverter;

[0014] A heat insulation layer is arranged between the inner wall surface of the needle tube and the outer wall surface of the outer sleeve in the heat insulation section.

[0015] Preferably, the shunt portion includes an annular shunt tube sleeved outside the central tube, the inner wall of the annular shunt tube has a step-like structure, so that the inner diameter of the tube near the needle tip end is L1, which is used to connect the end of the outer sleeve, and the inner diameter of the tube of the annular shunt tube away from the needle tip end is L2, which is used to connect the central tube extending out of the end of the outer sleeve on the handle side, L1>L2, and a through hole is set on the side of the annular shunt tube near the reflux joint, and the reflux joint is vertically connected at the through hole.

[0016] Preferably, L1 is equal to the outer diameter of the outer sleeve, and L2 is equal to the outer diameter of the central tube.

[0017] Preferably, a projection of the end of the outer sleeve in the direction of the central tube is closer to the needle tip than a projection of the reflux connector in the direction of the central tube.

[0018] Preferably, an adapting structure cooperating with the external delivery pipe is provided inside the handle near the inlet joint, and the inlet end of the central pipe is connected to the outlet end of the adapting structure.

[0019] Preferably, the thermal insulation layer is filled with multiple layers of thermal insulation material, the thermal insulation material includes one or two of a radiation screen and a spacer, the material of the radiation screen includes metal foil and / or metal-plated film, and the material of the spacer includes non-woven fabric and / or nylon.

[0020] Preferably, the starting end of the outer sleeve is located in the treatment section.

[0021] Preferably, the outer diameter of the needle tube is 0.5 mm to 10 mm; and / or

[0022] Length is 1 mm to 500 mm; and / or

[0023] The manufacturing material is one or more composites of stainless steel, titanium, and titanium alloy.

[0024] Preferably, the needle tip is in the shape of a cone, a triangular tip, a quadrangular tip or a multi-sided tip; and / or

[0025] The needle tip is internally provided with one or more of carbon fiber, metal wire, metal mesh, fin, liquid metal to enhance heat exchange; and / or

[0026] The angle of the needle tip is 1° to 180°.

[0027] Preferably, a reflux pipe is provided at the outlet of the reflux joint, and the reflux pipe is in the shape of a straight pipe, a corrugated pipe or a combination thereof; and / or

[0028] The reflux pipe is made of rubber, plastic, metal or carbon fiber.

[0029] The present invention also provides a minimally invasive steam probe treatment device for tumor treatment, comprising a treatment device host and a probe; the treatment device host comprises a steam generating device, a working fluid recovery device and a control system, and the probe is a minimally invasive steam probe for tumor treatment;

[0030] The control system is electrically connected to the steam generating device, and is used to control the temperature, pressure and flow rate of steam generated by the steam generating device; the outlet of the steam generating device is communicated with the inlet joint of the minimally invasive steam probe for tumor treatment, and is used to deliver high-temperature and high-pressure steam to the minimally invasive steam probe for tumor treatment; the reflux joint of the minimally invasive steam probe for tumor treatment is communicated with the inlet of the working fluid recovery device, and is used to deliver condensed liquid to the working fluid recovery device.

[0031] Preferably, the heat source of the steam generating device is one or more of an electric heating source, a microwave heating source, an eddy current heating source, a light heating source, an ultrasonic heating source, a chemical reaction heating source, or a chemical reaction directly generating steam heat source.

[0032] Preferably, the steam generated by the steam generating device is a mixture of one or more of water vapor, methanol vapor, formic acid vapor, ethanol vapor, acetic acid vapor, ethyl ester vapor, propanol vapor, propionic acid vapor, and propyl ester vapor.

[0033] Preferably, the working fluid recovery device is one or more of a condensation working fluid recovery device, a physical adsorption working fluid recovery device, a chemical adsorption working fluid recovery device, a chemical reaction working fluid recovery device, a natural evaporation working fluid recovery device, and a heating evaporation working fluid recovery device.

[0034] Preferably, it also includes a temperature sensor disposed on the minimally invasive steam probe for tumor treatment; the temperature sensor is connected to the control system, and the temperature sensor is a platinum resistor or a thermocouple.

[0035] The minimally invasive steam probe and treatment equipment for tumor treatment provided by the present invention have the following advantages:

[0036] The minimally invasive steam probe for tumor treatment provided by the present invention has only heat exchange during the working process, and no substances enter the human tissue. It is a purely physical green treatment method, non-toxic and with little side effects; the working temperature is adjustable, and it is suitable for treating tumors of different sizes. It also has the advantages of being easy to use and having a low price of working fluid, and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the overall front structure of the minimally invasive steam probe treatment device for tumor treatment provided by the present invention;

[0038] Figure 2 This is a schematic diagram of the overall structure of the back side of the minimally invasive steam probe treatment device for tumor treatment provided by the present invention;

[0039] Figure 3A schematic diagram of the structure of a minimally invasive steam probe for tumor treatment provided by the present invention;

[0040] Figure 4 for Figure 3 Enlarged view of the left part.

[0041] in:

[0042] 1-control system; 2-steam generating device; 3-display; 4-probe; 5-working fluid recovery device;

[0043] 4-probe; 41-inlet connector; 42-handle; 43-needle tube; 44-needle tip; 45-return connector; 46-dividing part;

[0044] 411-groove; 431-center tube; 432-second reflow channel; 433-insulation layer; 434-inner wing; 435-steam outlet cavity; 436-first reflow channel; 437-outer sleeve. DETAILED DESCRIPTION

[0045] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0046] refer to Figure 3 to Figure 4 On the one hand, the present invention provides a minimally invasive steam probe for tumor treatment, including a needle tube 43, a needle tip 44 arranged at one end of the needle tube 43, and a handle 42 arranged at the opposite end of the needle tube 43, the handle 42 has a shunt portion 46 close to the needle tube 43, the handle 42 has an inlet joint 41 at the end away from the needle tube 43, and a reflux joint 45 is arranged on the side of the handle 42 close to the needle tube end; the inlet end of the reflux joint 45 is connected to the reflux outlet of the shunt portion 46.

[0047] The tube wall of the needle tube 43 has a treatment section close to the needle tip 44 and a heat-insulating section away from the needle tip 44. The needle tube 43 has a central tube 431 that runs through the needle tube 43 and the handle 42 to serve as a steam flow channel.

[0048] The end of the central tube 431 is connected to the steam outlet chamber 435 , and the high-temperature steam transported through the central tube 431 is condensed into liquid in the steam outlet chamber 435 .

[0049] The inner wall surface of the needle tube 43 in the treatment section is circumferentially provided with an inner wing 434 (inner fin), and there is a space gap between the inner wing 434 and the outer wall of the central tube of the treatment section to serve as a first reflux channel 436. The inlet of the first reflux channel 436 is connected to the steam outlet chamber 435, and the condensed liquid in the steam outlet chamber 435 enters the first reflux channel 436.

[0050] An outer sleeve 437 coaxially covering the central tube 431 is provided in the middle region of the central tube 431 . The end of the outer sleeve 437 is disposed in front of the inlet of the reflux joint 45 to serve as a reflux liquid inlet of the diversion part 46 .

[0051] The space between the outer sleeve 437 and the central tube 431 serves as the second reflux channel 432. The outlet end of the first reflux channel 436 is connected to the inlet end of the second reflux channel 432. The outlet end of the second reflux channel 432 is connected to the reflux inlet of the diverter 46. A heat insulating layer 433 is provided between the inner wall surface of the needle tube 43 in the heat insulating section and the outer wall surface of the outer sleeve 437.

[0052] The inlet connector 41 and the return connector 45 are both mounted on the handle 42; the inlet connector 41 can be connected by one or more of a thread, a quick-insert joint, a straight plug, and a gas connector.

[0053] Furthermore, the shunt portion 46 includes an annular shunt tube sleeved outside the central tube 431, and the inner wall of the annular shunt tube has a step-like structure, so that the inner diameter of the tube near the needle tip 44 is L1, which is used to connect the end of the outer sleeve 437; the inner diameter of the tube of the end of the annular shunt tube away from the needle tip 44 is L2, which is used to connect the central tube 431 extending out of the end of the outer sleeve 437 on the handle side, L1>L2, and a through hole is set on the side of the annular shunt tube near the reflux joint 45, and the reflux joint 45 is vertically connected at the through hole.

[0054] Furthermore, L1 is equal to the outer diameter of the outer sleeve 437, and L2 is equal to the outer diameter of the central tube 431. Thus, after the reflux liquid enters the L1 side of the annular diverter tube from the outlet end of the second reflux channel 432, it has no outlet on the L2 side and can only flow out from the reflux joint 45.

[0055] Furthermore, the projection of the end of the outer sleeve 437 in the direction of the central tube 431 is closer to the needle tip 44 than the projection of the reflux connector 45 in the direction of the central tube 431 .

[0056] In this way, the side of the annular shunt tube of the shunt part 46 close to the handle 42 (connected to the central tube 431) serves as the inlet for the steam flow. The steam flows along the central tube 431 toward the needle head and condenses into liquid. Then, the steam passes through the first reflux channel 436 and then through the second reflux channel 432 to flow to the end of the outer sleeve 437 (the reflux liquid inlet of the shunt part 46), and enters the internal space of the annular shunt tube. Along the space gap formed between the outer wall of the central tube 431 and the inner wall of the annular shunt tube, under the action of gravity, the steam flows through the reflux liquid outlet of the shunt part 46 to the reflux joint 45.

[0057] Furthermore, the starting end of the outer sleeve 437 is located within the treatment section.

[0058] Furthermore, an adapting structure that matches the external delivery pipe is provided inside the handle 42 near the inlet joint 41, and the inlet end of the central pipe 431 is connected to the outlet end of the adapting structure. Here, as an implementable manner, the adapting structure can be a groove 411 or a convex block, and its main function is to connect with the external delivery pipe, and the present invention is not limited here.

[0059] Furthermore, the heat insulating layer 433 is filled with multiple layers of heat insulating materials, and the heat insulating materials include one or both of a radiation screen and a spacer. The material of the radiation screen includes metal foil and / or metallized film, and the material of the spacer includes non-woven fabric and / or nylon.

[0060] Specifically, multiple layers of thermal insulation materials can be added to the vacuum layer of the probe to enhance the vacuum thermal insulation performance. The multi-layer thermal insulation material is composed of one or two of a radiation screen and a spacer. The material of the radiation screen includes metal foil, metal-plated film (such as aluminum, gold, silver, etc.), and the material of the spacer includes non-woven fabric, nylon and other materials with poor thermal conductivity. The arrangement method is that the radiation screen and the spacer are alternately arranged, that is, one layer of spacer and one layer of radiation screen.

[0061] As another possible implementation of the present invention, the heat insulation layer 433 may also be a vacuum layer.

[0062] The heat insulating layer 433 can prevent the temperature of the steam from decreasing during the process of being transported to the tumor site (the treatment section of the needle tube 43), thereby affecting the treatment effect.

[0063] In addition, the inner wall surface of the needle tube 43 in the treatment section is provided with inner wings 434 in the circumferential direction, and there is a space gap between the inner wings 434 and the outer wall of the central tube of the treatment section as the first reflux channel 436; this is actually the position closest to the tumor site, and the heat insulation layer 433 is no longer provided at this position, but the inner wings 434 are provided, because this is the treatment area, and the efficient heat exchange performance of the inner wing tube can achieve efficient heat exchange between high-temperature steam and tumor tissue, so that the high-temperature steam can effectively act on the tumor tissue position to achieve thermal ablation. The liquid condensed in the steam outlet cavity 435 passes through the first reflux channel 436, the second reflux channel 432, the diversion part 46 and the reflux joint 45 in sequence, and is connected to the working fluid recovery device 5 for the recovery of the reflux liquid.

[0064] As an embodiment of the present invention, the outer diameter of the needle tube 43 is 0.5 mm to 10 mm, the length is 1 mm to 500 mm, and the manufacturing material is one or more composites of stainless steel, titanium, and titanium alloy.

[0065] Furthermore, a needle tip 44 is installed outside the outlet end of the central tube 431, and the needle tip is used to puncture into the tumor; the angle of the needle tip 44 is 1° to 180°. The shape of the needle tip 44 is a cone, a triangular tip, a quadrangular tip or a multi-edge tip. The inside of the needle tip 44 uses one or more of carbon fiber, metal wire, metal mesh, fins, and liquid metal to enhance heat exchange and achieve thermal ablation of tumor tissue.

[0066] Furthermore, a return pipe is arranged at the outlet of the return joint 45, and the shape of the return pipe is a straight pipe, a corrugated pipe or a combination of the two. The material of the return pipe is rubber, plastic, metal or carbon fiber.

[0067] It should be noted that the central tube 431 in the needle tube 43 runs through the needle tube 43 and the handle 42 area to serve as a steam inflow channel. The inlet end of the steam inflow channel (central tube 431) is connected to the steam generating device 2 through the inlet joint 41, and steam is transported to the central tube 431 through the steam generating device 2; the outlet end of the central tube 431 is connected to the steam outlet chamber 435, and the steam output from the central tube 431 is condensed into liquid in the steam outlet chamber 435; then it passes through the first reflux channel 436 and then the second reflux channel 432 to flow to the end of the outer sleeve 437 (the reflux inlet of the diverter 46), and enters the internal space of the throttling tube, along the space gap formed between the outer wall of the central tube 431 and the inner wall of the throttling tube, under the action of gravity, it flows to the reflux joint 45 through the reflux outlet of the diverter 46.

[0068] Another aspect of the present invention provides a minimally invasive steam probe treatment device for tumor treatment, including a treatment device host and a probe; the treatment device host includes a steam generator 2, a working fluid recovery device 5 and a control system 1, and the probe is a minimally invasive steam probe for tumor treatment; the control system 1 is electrically connected to the steam generator 2, and is used to control the temperature, pressure and flow rate of steam generated by the steam generator 2.

[0069] refer to Figure 1 to Figure 2 , a minimally invasive steam probe treatment device for tumor treatment, including:

[0070] (1) Steam generating device

[0071] The steam generating device 2 is used to generate high-temperature steam required for the treatment process under the control of the control system.

[0072] In practical applications, the heat source of the steam generating device 2 is one or more of an electric heating source, a microwave heating source, an eddy current heating source, a light heating source, an ultrasonic heating source, a chemical reaction heating source, or a chemical reaction directly generating steam heat source.

[0073] The steam generated by the steam generating device 2 may be a mixture of one or more of water vapor, methanol vapor, formic acid vapor, ethanol vapor, acetic acid vapor, ethyl ester vapor, propanol vapor, propionic acid vapor, and propyl ester vapor.

[0074] (2) Probe

[0075] The probe is used to deliver the high-temperature steam generated by the steam generator to the tumor site for efficient thermal ablation without causing thermal damage to normal tissues along the probe puncture path;

[0076] Furthermore, it also includes a temperature sensor arranged on the probe (reflux joint or needle head); the temperature sensor is connected to the control system 1.

[0077] Furthermore, the temperature sensor is a platinum resistor or a thermocouple.

[0078] The probe is provided with a temperature sensor for temperature monitoring during treatment. The temperature sensor is a platinum resistor or a thermocouple; the temperature sensor can be installed at various positions of the probe, including inside the needle tip, inside the steam inflow channel and / or inside the return channel.

[0079] (3) Working fluid recovery device

[0080] The working fluid recovery device is used to recover and store the working fluid after thermal ablation.

[0081] In practical applications, the working fluid recovery device 5 can be one or more of a condensation working fluid recovery device, a physical adsorption working fluid recovery device, a chemical adsorption working fluid recovery device, a chemical reaction working fluid recovery device, a natural evaporation working fluid recovery device, and a heating evaporation working fluid recovery device. A chemical reaction working fluid recovery device refers to: consuming the recovered working fluid through reaction. Through the working fluid recovery device, on the one hand, working fluid pollution can be prevented; on the other hand, for example, when an adsorption recovery method is adopted, the working fluid becomes solid instead of liquid after adsorption, which is convenient for subsequent other treatments.

[0082] (4) Display device

[0083] The display device is used to display the operating status of the minimally invasive steam probe treatment device and can also be touch-controlled. The display can use one display or multiple displays to realize the display function.

[0084] (5) Control system

[0085] The control system is electrically connected to the steam generating device 2 and can adjust one or more parameters of steam flow, pressure, and temperature according to treatment needs (used to control the temperature, pressure, and flow of steam generated by the steam generating device 2).

[0086] The control system can be implemented by one or more of a programmable logic controller, a printed circuit, and an integrated circuit. The control system can use one or more of a keyboard, a mouse, a touch pad, a touch screen, and a gesture operation device as an input device.

[0087] Furthermore, the display 3 of the minimally invasive steam probe treatment device for tumor treatment is connected to the control system 1 .

[0088] Furthermore, the heat source of the steam generating device 2 is one or more of an electric heating source, a microwave heating source, an eddy current heating source, a light heating source, an ultrasonic heating source, a chemical reaction heating source, or a chemical reaction directly generating steam heat source.

[0089] Furthermore, the steam generated by the steam generating device 2 is a mixture of one or more of water vapor, methanol vapor, formic acid vapor, ethanol vapor, acetic acid vapor, ethyl ester vapor, propanol vapor, propionic acid vapor, and propyl ester vapor.

[0090] Furthermore, the working fluid recovery device 5 is one or more of a condensation working fluid recovery device, a physical adsorption working fluid recovery device, a chemical adsorption working fluid recovery device, a chemical reaction working fluid recovery device, a natural evaporation working fluid recovery device, and a heating evaporation working fluid recovery device.

[0091] The present invention provides a minimally invasive steam probe treatment device for tumor treatment, and the working principle process is as follows:

[0092] When in use, the control system controls the steam generating device 2 to generate high-temperature steam with the required flow rate, pressure and temperature. The steam is controlled to flow into the probe 4 connected to the main device, and enters the steam outlet cavity 435 at the needle tip through the handle 42 and the center tube 431 of the probe 4. The steam releases heat in the steam outlet cavity 435 at the needle tip and condenses into liquid; then it flows to the working fluid recovery device 5 through the first reflux channel 436, the second reflux channel 432, the diversion part 46 and the reflux joint 45. In the present invention, during the process of high-temperature steam being transported through the steam inflow channel, a return channel (first return channel 436, second return channel 432) is coaxially arranged outside the steam inflow channel (central tube 431), and then a heat insulation layer 433 is coaxially arranged outside the return channel; the heat insulation layer 433 is a smooth surface structure, and has two functions: first, it can prevent the high-temperature steam from cooling down during the transportation process, thereby affecting the treatment effect; on the other hand, the heat insulation layer 433 can protect the normal tissue on the needle tube puncture path and prevent the high-temperature steam from scalding the normal tissue on the needle tube puncture path. The second return channel 432 is arranged between the steam inflow channel (central tube 431) and the heat insulation layer 433, and its function is: since the temperature of the condensed liquid recovered by the return pipe is also high, the heat insulation layer 433 can still protect the normal tissue on the needle tube puncture path. Through the three-layer coaxial arrangement, it has the advantage of ingenious structural design. In the present invention, the treatment section of the needle tube 43 is equipped with an inner wing 434, which can strengthen the heat exchange between the high-temperature steam and the tumor tissue and improve the thermal ablation effect. In addition, a pump can be installed at the outlet end of the second reflux channel 432. Under the action of the pump, the high-temperature steam reaches the steam outlet cavity 435 through the steam flow channel (central tube 431), and quickly exchanges heat with the tumor tissue. The condensed liquid quickly leaves the tumor tissue through the reflux pipe; and the new high-temperature steam is immediately transported over and acts on the tumor tissue, thereby always keeping the new high-temperature steam continuously acting on the tumor tissue, which has a significant therapeutic effect. During the treatment process, the pressure, temperature, flow rate and other working parameters of the steam can be adjusted by the control system, and the treatment temperature can be monitored by the temperature sensor.

[0093] The minimally invasive steam probe treatment device for tumor treatment provided by the present invention has the following advantages:

[0094] The minimally invasive steam probe treatment device for tumor treatment provided by the present invention has only heat exchange during the working process, and no substances enter the human tissue. It is a purely physical green treatment method, non-toxic and with little side effects; the working temperature is adjustable and suitable for treating tumors of different sizes. It also has the advantages of easy use and low working fluid price, and is easy to promote.

[0095] The present invention provides a minimally invasive steam probe and treatment equipment for tumor treatment, which is a thermal ablation device for tumor treatment. It can deliver high-temperature steam to the tumor site to implement efficient thermal ablation without causing thermal damage to normal tissues along the probe puncture path. It has the advantages of simple working principle, easy use, and low working fluid price, and can benefit a wide range of patients.

[0096] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A minimally invasive steam probe for tumor treatment, characterized in that: It comprises a needle tube (43), wherein the needle tube (43) has a central tube (431) therein, and the central tube (431) is a steam flow channel; The end of the central tube (431) is in communication with a steam outlet cavity (435) located at the needle tip, and the high-temperature steam transported through the central tube (431) releases heat in the steam outlet cavity (435); An inner wing (434) is provided in the circumferential direction of the inner wall surface of the needle tube (43) located in the treatment section, and a space gap between the inner wing (434) and the outer wall of the central tube (431) in the treatment section is a first reflux channel (436), and an inlet of the first reflux channel (436) is connected to the steam outlet chamber (435); An outer sleeve (437) coaxially covering the central tube (431) is provided in the middle section of the central tube (431); the space between the outer sleeve (437) and the central tube (431) is a second reflux channel (432); the outlet end of the first reflux channel (436) is connected to the inlet end of the second reflux channel (432); the outlet end of the second reflux channel (432) is connected to the reflux inlet of the diverter portion (46); the reflux outlet of the diverter portion (46) is connected to the reflux joint ( The reflux joint (45) is connected to the inlet end of the needle tube (43), the axial direction of the reflux joint (45) is perpendicular to the axial direction of the central tube (431), and the liquid condensed from the steam flows from the outlet end of the second reflux channel (432) through the reflux outlet of the diverter (46) to the reflux joint (45); the needle tube (43) also includes a needle tip (44) arranged at one end of the needle tube (43) and a handle (42) arranged at the opposite end of the needle tube (43), and the central tube (431) passes through the needle tube (43) and the handle (42) area; The handle (42) has a shunt portion (46) inside that is close to the needle tube (43), and the shunt portion (46) includes an annular shunt tube that is sleeved outside the central tube (431), and an end of the annular shunt tube that is close to the needle tip (44) is used to connect to the end of the outer sleeve (437), and an end of the annular shunt tube that is away from the needle tip (44) is used to connect to the central tube (431) that extends from one side of the handle (42) outside the end of the outer sleeve (437).

2. The minimally invasive steam probe for tumor treatment according to claim 1, characterized in that: A side of the annular flow dividing pipe close to the handle (42) is connected to the central pipe (431) and serves as an inlet for the steam to flow; The space gap formed between the inner wall of the annular flow dividing pipe and the outer wall of the central pipe (431) is connected to the reflux outlet of the flow dividing portion (46).

3. The minimally invasive steam probe for tumor treatment according to claim 2, characterized in that: The inner wall of the annular shunt pipe has a step-like structure; The inner diameter of the tube at the end of the annular shunt tube close to the needle tip (44) is L1, and the inner diameter of the tube at the end of the annular shunt tube away from the needle tip (44) is L2, wherein L1>L2.

4. The minimally invasive steam probe for tumor treatment according to claim 3, characterized in that: The reflux connector (45) is provided on one side of the handle (42) close to the end of the needle tube (43). A through hole is provided on the side of the annular flow dividing pipe close to the reflux joint (45), and the reflux joint (45) is vertically connected to the through hole.

5. The minimally invasive steam probe for tumor treatment according to claim 4, characterized in that: The inner diameter L1 of the annular shunt tube at the end close to the needle tip (44) is equal to the outer diameter of the outer sleeve (437), and the inner diameter L2 of the annular shunt tube at the end away from the needle tip (44) is equal to the outer diameter of the central tube (431); The reflux liquid flows out from the outlet end of the second reflux channel (432), enters the interior of the annular shunt tube from the tube at one end of the annular shunt tube close to the needle tip (44), and then flows out from the reflux joint (45).

6. The minimally invasive steam probe for tumor treatment according to claim 4 or 5, characterized in that: The projection of the end of the outer sleeve (437) in the direction of the central tube (431) is closer to the needle tip (44) than the projection of the return joint (45) in the direction of the central tube (431).

7. The minimally invasive steam probe for tumor treatment according to any one of claims 1 to 5, characterized in that: The wall of the needle tube (43) has the treatment section close to the needle tip (44), and the starting end of the outer sleeve (437) is located in the treatment section.

8. The minimally invasive steam probe for tumor treatment according to any one of claims 1 to 5, characterized in that: An end of the handle (42) away from the needle tube (43) is provided with an inlet connector (41), and the inlet connector (41) is connected to the handle (42) by one or more of a thread, a quick-insert joint, a straight connector, and a gas connector; An adapting structure that matches the external delivery pipe is provided inside the handle (42) near the inlet joint (41), and the inlet end of the central pipe (431) is connected to the outlet end of the adapting structure.

9. The minimally invasive steam probe for tumor treatment according to any one of claims 1 to 5, characterized in that: The wall of the needle tube (43) has a heat-insulating section away from the needle tip (44), and a heat-insulating layer (433) is provided between the inner wall surface of the needle tube (43) in the heat-insulating section and the outer wall surface of the outer sleeve (437), and the heat-insulating layer (433) is coaxially arranged with the outer sleeve (437).

10. The minimally invasive steam probe for tumor treatment according to claim 9, characterized in that: The heat insulation layer (433) is filled with multiple layers of heat insulation material, and the heat insulation material includes a radiation screen and / or a spacer; The material of the radiation screen includes metal foil and / or metallized film; The material of the spacer includes non-woven fabric and / or nylon.

11. The minimally invasive steam probe for tumor treatment according to claim 9, characterized in that: The heat insulation layer (433) is a vacuum layer, and multiple layers of heat insulation materials are arranged in the vacuum layer, and the multiple layers of heat insulation materials include one or two of a radiation screen and a spacer; When the multi-layer thermal insulation material comprises radiation screens and spacers, the radiation screens and spacers are arranged alternately.

12. The minimally invasive steam probe for tumor treatment according to any one of claims 1 to 5, characterized in that: The outer diameter of the needle tube (43) is 0.5 mm to 10 mm; and / or The length of the needle tube (43) is 1 mm to 500 mm.

13. A minimally invasive steam probe for tumor treatment according to any one of claims 1 to 5, characterized in that: The needle tip (44) is in the shape of a cone or a multi-faceted tip.

14. The minimally invasive steam probe for tumor treatment according to any one of claims 1 to 5, characterized in that: The needle tube (43) is made of a material selected from the group consisting of stainless steel, titanium, and titanium alloy or a combination thereof.

15. The minimally invasive steam probe for tumor treatment according to any one of claims 1 to 5, characterized in that: The interior of the needle tip (44) is made of one or more of carbon fiber, metal wire, metal mesh, fins, and liquid metal.

16. The minimally invasive steam probe for tumor treatment according to claim 4 or 5, characterized in that: A reflux pipe is provided at the outlet of the reflux joint (45), and the reflux pipe is in the shape of a straight pipe, a corrugated pipe, or a combination of the two.

17. The minimally invasive steam probe for tumor treatment according to claim 16, characterized in that: The reflux pipe is made of rubber, plastic, metal or carbon fiber.

18. The minimally invasive steam probe for tumor treatment according to any one of claims 1 to 5, characterized in that: The minimally invasive steam probe is provided with a temperature sensor, and the temperature sensor is located at one or more locations within the needle tip (44), within the steam inflow channel, within the first return channel (436), and within the second return channel (432).

19. The minimally invasive steam probe for tumor treatment according to claim 18, characterized in that: The temperature sensor is a platinum resistor or a thermocouple.

20. A minimally invasive steam probe treatment device for tumor treatment, comprising the minimally invasive steam probe for tumor treatment according to any one of claims 1 to 19, characterized in that: It also includes a treatment equipment host, the treatment equipment host including a steam generating device (2) and a working fluid recovery device (5); The outlet of the steam generating device (2) is in communication with the inlet connector (41) of the minimally invasive steam probe, and is used to deliver high-temperature and high-pressure steam to the minimally invasive steam probe for tumor treatment; The reflux joint (45) of the minimally invasive steam probe is in communication with the inlet of the working fluid recovery device (5) and is used to transport condensed liquid to the working fluid recovery device (5).

21. The minimally invasive steam probe treatment device for tumor treatment according to claim 20, characterized in that: The heat source of the steam generating device (2) is one or more of an electric heating source, a microwave heating source, an eddy current heating source, a light heating source, an ultrasonic heating source, a chemical reaction heating source, or a chemical reaction directly generating steam heat source.

22. The minimally invasive steam probe treatment device for tumor treatment according to claim 20, characterized in that: The steam generated by the steam generating device (2) is a mixture of one or more of water vapor, methanol vapor, formic acid vapor, ethanol vapor, acetic acid vapor, ethyl ester vapor, propanol vapor, propionic acid vapor, and propyl ester vapor.

23. The minimally invasive steam probe treatment device for tumor treatment according to any one of claims 20 to 22, characterized in that: The working fluid recovery device (5) is one or more of a condensation working fluid recovery device, a physical adsorption working fluid recovery device, a chemical adsorption working fluid recovery device, a chemical reaction working fluid recovery device, a natural evaporation working fluid recovery device, and a heating evaporation working fluid recovery device.

24. The minimally invasive steam probe treatment device for tumor treatment according to any one of claims 20 to 22, characterized in that: It also comprises a control system (1), wherein the control system (1) is electrically connected to the steam generating device (2) and is used to control the temperature, pressure and flow rate of steam generated by the steam generating device (2); The control system (1) is also connected to the temperature sensor on the minimally invasive steam probe.

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