CN212879546U - Single working medium combined type ablation operation system - Google Patents
Single working medium combined type ablation operation system Download PDFInfo
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- CN212879546U CN212879546U CN202020388862.7U CN202020388862U CN212879546U CN 212879546 U CN212879546 U CN 212879546U CN 202020388862 U CN202020388862 U CN 202020388862U CN 212879546 U CN212879546 U CN 212879546U
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- 238000002679 ablation Methods 0.000 title claims abstract description 123
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- 238000011282 treatment Methods 0.000 claims abstract description 40
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- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 6
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Abstract
The utility model provides a single working medium combined type ablation operation system, which comprises a cold tank, a control unit, a valve box, a probe conveying pipe and an ablation needle, wherein the cold tank and the control unit comprise the cold tank, and a treatment working medium is stored in the cold tank; the valve box comprises a first heat exchange device, a cold valve and a hot valve, and the cold valve and the hot valve are respectively connected with the cold tank; one end of the first heat exchange device is connected with the hot valve, and the other end of the first heat exchange device is connected with the heat ablation heater. One end of the probe delivery pipe is respectively communicated with the cold valve and the heat ablation heater, and the other end of the probe delivery pipe is connected with the ablation needle. The single working medium combined type ablation operation system combines the advantages of cryoablation and thermal ablation, thereby avoiding the inconvenience of the single-function cryoablation system and the thermal ablation system in the use process; the system takes the liquid nitrogen as a single working medium, and the liquid nitrogen is low in price and easy to obtain compared with other working media, so that the operation steps are reduced, and risks such as connection errors are avoided.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a single working medium combined type melts operation system.
Background
Thermal ablation, cryoablation, has been widely used in solid tumor therapy. The thermal ablation comprises radio frequency ablation, microwave ablation, focused ultrasound ablation, laser ablation and the like, but the thermal ablation has the problems of difficulty in monitoring an ablation boundary, strong pain of a patient and the like.
The basic therapeutic principle of cryoablation is to reduce the temperature of a target ablation part to be lower than the temperature of cell necrosis and apoptosis through the heat absorption and evaporation of a refrigerant. The treatment boundary can be monitored by combining with an imaging device in the operation, and the pain of a patient is small. At present, cryoablation working media such as argon gas, liquid nitrogen and the like are mainly used as refrigerants. The cryoablation system using argon as refrigerant adopts joule-thomson effect, that is, the pressure of argon is sharply reduced when high pressure argon passes through tiny micropores, and the temperature of argon is reduced to below-140 ℃, but the working principle of the cryoablation system requires that the operation is carried out under higher pressure (about 17-40 MPa), thereby bringing higher use risk.
And to the cold and hot compound ablation system that collects cold ablation and heat ablation in an organic whole, need the system to possess the cold working medium that is used for low temperature treatment simultaneously and be used for the hot working medium of high-temperature treatment usually, implement the treatment scheme that cold ablation and heat were ablated separately respectively, can possess the combined type cold and hot operation system that melts of a single working medium, be this novel urgent problem that awaits the solution.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a single working medium combined type ablation operation system which can realize the high-low temperature combined ablation treatment function.
The utility model relates to a single working medium compound ablation operation system, which comprises,
the cold tank and control unit comprises a cold tank, wherein a working medium for treatment is stored in the cold tank;
the valve box comprises a first heat exchange device, a cold valve and a hot valve, the cold valve and the hot valve are respectively connected with the cold tank, one end of the first heat exchange device is connected with the hot valve, and the other end of the first heat exchange device is provided with a heat ablation heater; one end of the probe conveying pipe is respectively communicated with the cold valve and the thermal ablation heater so as to convey working media; and the number of the first and second groups,
and the ablation needle is connected with the other end of the probe delivery pipe.
Preferably, the therapeutic ablation working medium is liquid nitrogen.
In one embodiment, the surgical system further comprises a temperature mapping unit for estimating the temperature condition of the treatment area of the ablation needle, wherein the temperature mapping unit comprises a valve box outlet temperature sensor, a valve box outlet pressure sensor, a backflow inlet temperature sensor and a backflow inlet pressure sensor, the valve box outlet temperature sensor and the valve box outlet pressure sensor are arranged between the valve box and the probe delivery pipe and close to the valve box, the backflow inlet temperature sensor and the backflow inlet pressure sensor are arranged between the ablation needle and the backflow processing unit, and the backflow processing unit is communicated with the ablation needle.
In one embodiment, the cold tank and control unit further comprises a cold tank pressure sensor, a cold tank pressurization valve, a cold tank pressurization fan, and a filter connected to the cold tank, wherein the filter is disposed within the cold tank.
In one embodiment, the reflux treatment unit comprises a reflux tube and a reflux heater, and the ablation needle and the reflux heater are communicated through the reflux tube.
In one embodiment, the backflow processing unit further comprises a backflow safety valve connected with the backflow heater, and a proportional valve connected with the backflow safety valve in parallel, one end of the proportional valve is connected with the backflow heater, and a backflow temperature sensor and a backflow pressure sensor are further arranged between the backflow heater and the proportional valve.
In one embodiment, the surgical system further comprises an exhaust gas treatment unit comprising a second heat exchange device, the second heat exchange device being connected to the cold tank.
In one embodiment, the surgical system further comprises a phase separation valve, an electrically controlled phase separation valve, and a normally open phase separation valve, the phase separation valve being connected in series with the electrically controlled phase separation valve, the phase separation valve and the electrically controlled phase separation valve being connected in parallel with the normally open phase separation valve; the junction of the electric control phase separation valve and the normally open phase separation valve is connected with the waste gas treatment unit, and the junction of the phase separation valve and the normally open phase separation valve is connected with the valve box.
In one embodiment, the reflux temperature of the surgical system is maintained at 186 ℃ ± 10 ℃.
In one embodiment, the surgical system is further provided with an ablation needle return temperature sensor disposed at the ablation needle.
Compared with the prior art, the single working medium compound ablation operation system of the utility model has the advantages that,
1) the surgical system of the utility model combines the advantages of cryoablation and thermal ablation, thereby avoiding the inconvenience of the cryoablation system with single function and the thermal ablation system in the using process;
2) the operation system of the utility model has low operation pressure and reduces operation risk;
3) the operation system of the utility model takes liquid nitrogen as a single working medium, and the liquid nitrogen is cheap and easy to obtain compared with other working media such as argon, helium, laughing gas (nitrous oxide) and the like; the operation system uses a single working medium, so that the operation steps are reduced, and the risks such as connection errors are avoided;
4) the operation system of the utility model adopts two-stage phase separation control, and the two-stage phase separation is connected in parallel;
5) the surgical system of the utility model can be compatible with two temperature display methods of the treatment area, and is suitable for different types of ablation needles; meanwhile, the operation system can be compatible with two system pressure control methods, and is suitable for two different application occasions of saving working media and fast responding;
6) the utility model discloses an operation system is provided with exhaust-gas treatment unit and backward flow processing unit, need not to discharge working medium and carries out manual intervention, does not have waste liquid or solid, and the waste gas of production can directly discharge to the air for nitrogen gas.
The technical features mentioned above can be combined in various technically feasible ways to produce new embodiments, as long as the objects of the invention are achieved.
Drawings
The invention will be described in more detail hereinafter on the basis of non-limiting examples only and with reference to the accompanying drawings. Wherein:
fig. 1 shows a system structure diagram of a single working medium combined type ablation surgery system according to the utility model;
fig. 2 shows the structure diagram of the electric cabinet system of the surgical system of the present invention.
Wherein the reference numerals are:
1. a surgical system; 10. a cooling tank and a control unit; 101. cooling the tank; 102. a cold tank pressurization valve; 103. a booster fan; 104. a filter; 105. a cold tank air release valve; 106. a standby air release valve; 107. a cold tank pressure sensor; 108. a safety valve; 109. a first muffler; 110. a cold tank level gauge; 20. a valve box; 201. a thermal valve; 202. a cold valve; 203. a first heat exchange means; 204. a first check valve; 205. a thermal ablation heater; 206. A thermal ablation heater temperature sensor; 207. a cold valve temperature sensor; 208. a phase separation valve; 209. an electrically controlled phase separation valve; 210. a normally open phase separation valve; 211. a normally open phase separation temperature sensor; 30. a temperature mapping unit; 301. a valve box outlet temperature sensor; 302. a valve box outlet pressure sensor; 303. a return inlet temperature sensor; 304. a return inlet pressure sensor; 401. a probe delivery pipe; 402. an ablation needle; 403. an ablation needle return temperature sensor; 50. a reflux processing unit; 501. a return pipe; 502. a second check valve; 503. a reflux heater; 504. a reflux heater temperature sensor; 505. a backflow safety valve; 506. a proportional valve; 507. a return temperature sensor; 508. a return pressure sensor; 509. a third silencer; 510. a fourth muffler; 60. an exhaust gas treatment unit; 601. a second heat exchange means; 602. a second muffler.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples. It should be noted that, as long as no conflict is formed, the embodiments and the features in the embodiments of the present invention may be combined with each other, and the technical solutions formed are all within the scope of the present invention.
The parts not mentioned in the utility model can be realized by adopting or using the prior art for reference.
As shown in fig. 1, fig. 1 shows an embodiment of a single working medium combined type ablation operation system (hereinafter referred to as operation system) 1 of the present invention, the operation system 1 includes a cooling tank and control unit 10, a valve box 20, a probe delivery pipe 401 and an ablation needle 402, wherein the cooling tank and control unit 10 includes a cooling tank 101, in which a liquid nitrogen for treatment is stored. The valve box 20 comprises a first heat exchange device 203, a cold valve 202 and a hot valve 201, wherein the cold valve 202 and the hot valve 201 are respectively connected with the cold tank 101 so as to respectively control the output of working media in the cold tank 101. The first heat exchange means 203 is connected at one end to the thermal valve 201 and at the other end to the thermal ablation heater 205. One end of the probe delivery tube 401 is in communication with the cold valve 202 and the hot ablation heater 205, respectively, and the other end is connected to the ablation needle 402.
The operating principle of the surgical system 1 is as follows: the operation system 1 adopts liquid nitrogen as a working medium, and increases the pressure in the cold tank 101 to the working pressure in a self-pressurization mode. When the cryoablation working medium is output, the cold valve 202 is opened, the working medium in the cold tank 101 is driven by high pressure to pass through the cold valve 202, the probe conveying pipe 401 and the ablation needle treatment area, and the temperature of the ablation needle treatment area reaches minus 186 +/-10 ℃ through latent heat, so that the purpose of cryotherapy is achieved. When the heat ablation working medium is output, the hot valve 201 is opened, the working medium in the cold tank 101 is driven by high pressure to pass through the hot valve 201 and the first heat exchange device 203 to the heat ablation heater 205, liquid nitrogen is converted into high-temperature nitrogen through the heat ablation heater 205, the high-temperature nitrogen is conveyed to the ablation needle 402 through the probe conveying pipe 401, and the surface temperature of a treatment area of the ablation needle 402 is enabled to be 75 +/-10 ℃, so that the purpose of heat ablation is achieved.
The utility model discloses a surgery system 1 will freeze and melt and combine with the heat ablation, has avoided the inconvenience of single function freeze system or heat ablation system in the use. The liquid nitrogen is used as a single working medium, the liquid nitrogen is low in price and easy to obtain compared with other working media such as argon gas, helium gas and laughing gas, the complexity of a system is reduced due to the use of the single working medium, operation steps are reduced, and risks such as connection errors are avoided.
Preferably, the first heat exchanging means 203 may be connected to the heat ablation heater 205 via a first check valve 204.
In one embodiment, the surgical system 1 further comprises a temperature mapping unit 30 for estimating the temperature of the treatment region of the ablation needle, wherein the temperature mapping unit 30 comprises a valve box outlet temperature sensor 301, a valve box outlet pressure sensor 302, a return inlet temperature sensor 303 and a return inlet pressure sensor 304, the valve box outlet temperature sensor 301 and the valve box outlet pressure sensor 302 are arranged at the connection position of the valve box 20 and the probe delivery pipe 401 and close to one end of the valve box 20; the return inlet temperature sensor 303 and the return inlet pressure sensor 304 are disposed between the return processing unit 50 and the ablation needle 402, and the return processing unit 50 is in communication with the ablation needle 402. In a preferred embodiment, the surgical system 1 is further provided with an ablation needle return temperature sensor 403, the ablation needle return temperature sensor 403 being provided at the ablation needle 402.
The surgical system 1 may be adapted for use with different types of ablation needles 402. When the surgical system 1 does not have the ablation needle return temperature sensor 403 at the ablation needle 402, the surgical system 1 can estimate the temperature of the treatment area of the ablation needle based on the temperature and pressure sensors (the manifold outlet temperature sensor 301, the manifold outlet pressure sensor 302, the return inlet temperature sensor 303, and the return inlet pressure sensor 304) at the manifold outlet and return inlet and replace the value of the ablation needle return temperature sensor 403 required in the control logic described above with the estimated value. In one embodiment, the cold tank and control unit 10 further comprises a cold tank pressure sensor 107 connected to the cold tank 101, a cold tank pressurization valve 102, a cold tank pressurization fan 103, a filter 104, and a cold tank purge valve 105, wherein the filter 104 is disposed within the cold tank 101. Preferably, cold tank and control unit 10 may further comprise a back-up purge valve 106 connected to cold tank 101, wherein cold tank purge valve 105 is connected in parallel with back-up purge valve 106. More preferably, a safety valve 108 is provided between the cold tank pressure sensor 107 and the cold tank 101, and the other end of the safety valve 108 is provided with a first muffler 109.
The surgical system 1 determines whether the working pressure within the cold reservoir 101 meets the target working pressure by acquiring data from the cold reservoir pressure sensor 107. When the pressure in the cold reservoir 101 is insufficient, the surgical system 1 will open the cold reservoir pressurization valve 102; when the pressure in the cold reservoir 101 is severely insufficient, the surgical system 1 will open the cold reservoir pressurization valve 102 and the pressurization fan 103. When the pressure in the cold box 101 exceeds the working requirement, the surgical system 1 will open the cold box deflation valve 105; the standby air release valve 106 can be used for achieving the purpose of quickly releasing the pressure of the cold tank 101 when accidents happen or the pressure releasing speed of the cold tank air release valve 105 cannot meet the system requirements.
In a preferred embodiment, the reflux treatment unit 50 comprises a reflux pipe 501 and a reflux heater 503, wherein one end of the reflux pipe 501 is connected with the ablation needle 402, the reflux pipe 501 is used as an outflow pipeline after the ablation working medium is treated, the other end of the reflux pipe is connected with the reflux heater 503 through a second check valve 502, and the other end of the reflux heater 503 is connected with a reflux safety valve 505. The end of the back-flow relief valve 505 is provided with a third muffler 509.
Preferably, the surgical system 1 further comprises a phase separation valve 208 and an exhaust gas treatment unit 60, wherein the phase separation valve 208 is connected with the valve box 20, the phase separation valve 208 is connected with an electrically controlled phase separation valve 209 in series, and the phase separation valve 208 and the electrically controlled phase separation valve 209 are connected with a normally open phase separation valve 210 in parallel; the exhaust gas treatment unit 60 includes a second heat exchange device 601, and one end of the second heat exchange device 601 is connected to the cold tank 101, and the other end is connected to a second muffler 602. The interface of the off-gas treatment unit 60 with the cold-tank and control unit 10 is at the exit where the cold-tank purge valve 105 and the back-up purge valve 106 meet. The interface of the exhaust treatment unit 60 with the valve box 20 is the outlet where the electrically controlled phase separation valve 209 meets the normally open phase separation valve 210. Valve manifold 20 is connected to phase separation valve 208 at the junction of phase separation valve 208 and normally open phase separation valve 210. The nitrogen gas carried by the exhaust gas discharged through the purge valve or the liquid nitrogen discharged through the separation valve may be treated by the second heat exchange device 601 in the exhaust gas treatment unit 60 to be converted into normal temperature nitrogen gas, and the normal temperature nitrogen gas may be discharged to the air.
The surgical system 1 employs two-stage "phase separation" control, with the two stages being in parallel. Because the electrically-controlled phase separation valve 209 is a valve which has a certain opening degree and cannot adjust the opening degree in the use process, the diameter of the valve is smaller than that of the phase separation valve 208; the phase separation valve 208 is an on-off valve having two states of on and off. When connected in series, electronically controlled phase separation 209 may be controlled by opening and closing phase separation valve 208. When the operation system 1 is at normal temperature and low-temperature output is performed, the amount of gas staying in the pipeline is large, so that the temperature in the treatment area of the ablation needle slowly drops, at the moment, the phase separation valve 208 can be opened, the gas in the pipeline is rapidly discharged, and the temperature in the treatment area of the ablation needle rapidly drops. After the temperature of the valve body of the cold valve 202 is reduced to the minimum, the gas amount in the pipeline is reduced, and at the moment, the phase separation valve 208 is closed, so that the working medium can be saved. Normally open phase separation valve 210 remains open during cryogenic processes and provides an outlet for gases generated by the tubing during cryogenic processes to ensure temperature stability in the needle treatment area. The opening degree of the normally open phase separation valve 210 can be adjusted by the normally open phase separation temperature sensor 211 to adapt to the difference of different devices.
In a preferred embodiment, the backflow processing unit 50 further comprises a proportional valve 506 connected in parallel with the backflow safety valve 505, one end of the proportional valve 506 is connected with the backflow heater 503, the other end of the proportional valve is connected with a fourth silencer 510, and a backflow temperature sensor 507 and a backflow pressure sensor 508 are further arranged between the backflow heater 503 and the proportional valve 506. The silencers (including the first silencer 109, the second silencer 602, the third silencer 509, and the fourth silencer 510) can muffle noise during operation of the surgical system 1.
In the operation system 1, when performing cryoablation, there are 2 setting methods for the target working pressure of the cold tank 101, which can be selected according to the system configuration.
The method comprises the following steps: when the operation system 1 performs cryoablation, the target working pressure of the cold tank 101 is set by the method that when the operation system 1 does not output cryoablation working medium, the operation system 1 defaults the target working pressure of the cold tank 101 to be the highest working pressure. When the pressure of the cold tank 101 is increased to the highest working pressure, the operation system 1 is allowed to output the cryoablation working medium. The user enters the cryoablation procedure of the surgical system 1 by clicking a cryoablation button on the touch display. The surgical system 1 determines whether to close or open the phase separation valve 208 according to the values obtained by the cold valve temperature sensor 207 and the ablation needle return temperature sensor 403. When the phase separation valve 208 is closed, the surgical system 1 gradually reduces the working pressure of the cold tank 101 according to the feedback value of the ablation needle return temperature sensor 403. The final realization is that the reflux temperature is kept at 186 ℃ +/-10 ℃ under the condition of reducing the consumption of liquid nitrogen.
This method is applicable to system configurations where the reflux processing unit 50 is free of the reflux pressure sensor 508 and the proportional valve 506. Its advantages are simple structure and control logic.
In the second method, in the operation system 1, the target working pressure of the cold tank 101 is set so that the target working pressure of the cold tank 101 is maintained at the maximum working pressure when performing cryoablation. When the surgical system 1 enters the cryoablation process, the surgical system 1 determines whether to close or open the phase separation valve 208 according to the values obtained by the cold valve temperature sensor 207 and the ablation needle return temperature sensor 403. After the phase separation valve 208 is closed, the surgical system 1 adjusts the opening degree of the proportional valve 506 according to the feedback value of the ablation needle reflux temperature sensor 403, so that a certain pressure difference is maintained between the liquid inlet end and the liquid outlet end of the ablation needle 402. The final realization is that the reflux temperature is kept at 186 ℃ +/-10 ℃ under the condition of reducing the consumption of liquid nitrogen.
This method is applicable to a system configuration in which the reflux processing unit 50 has a reflux pressure sensor 508 and a proportional valve 506. Its advantage is high response speed of cryoablation.
In the above embodiment, the surgical system 1 maintains the target working pressure of the cold pot 101 at the highest working pressure while performing thermal ablation. When the liquid nitrogen passes through the thermal ablation heater 205, volume expansion is generated due to phase change, but because two ends of the thermal ablation heater 205 are respectively connected with the cold tank 101 and the probe conveying pipe 401, pressure is released, and finally high-temperature nitrogen flows to one end of the ablation needle 402 with lower pressure.
The heating control principle of the surgical system 1 is as follows:
when the surgical system 1 is performing a thermal ablation procedure, the surgical system 1 needs to adjust the power of the thermal ablation heater 205 according to the value (75 ℃ ± 10 ℃) of the ablation needle reflux temperature sensor 403; at this time, the reflow heater 503 may be turned off. When the surgical system 1 is performing a cryoablation procedure, the surgical system 1 needs to adjust the power of the reflux heater 503 according to the value of the reflux temperature sensor 504; at this time, the thermal ablation heater 503 may be maintained at a lower power.
The following detailed description of the operation principle of the surgical system 1 of the present invention is:
the operation system 1 adopts liquid nitrogen as a working medium, and the pressure in the cold tank 101 is increased to the working pressure in a self-pressurization mode. When the cryoablation working medium is output, the cold valve 202 is opened, the working medium in the cold tank 101 is driven by high pressure to pass through the cold valve 202, the probe conveying pipe 401 and the ablation needle treatment area, and the temperature of the ablation needle treatment area reaches minus 186 +/-10 ℃ through latent heat, so that the purpose of cryotherapy is achieved. After heat exchange, the working medium vaporizes the residual liquid nitrogen into normal-temperature nitrogen through the reflux heater 503 and discharges the nitrogen into the air;
when the heat ablation working medium is output, the hot valve 201 is opened, the working medium in the cold tank 101 is driven by high pressure to pass through the hot valve 201, the first heat exchange device 203, the first check valve 204 and the heat ablation heater 205, liquid nitrogen is converted into high-temperature nitrogen through the heat ablation heater 205, the high-temperature nitrogen passes through the probe conveying pipe 401 to the ablation needle 402, and the surface temperature of a treatment area of the ablation needle is enabled to be 75 +/-10 ℃, so that the purpose of heat ablation is achieved. The high-temperature nitrogen gas passes through the return pipe 501, enters the return processing unit 50 in the surgical system 1, and is finally discharged into the air.
As shown in fig. 2, the surgical system 1 of the present invention is mainly implemented by the MCU for collecting analog values, outputting digital values and performing basic logic control. The MCU reports the state of the surgical system 1 to the industrial personal computer through communication. The industrial personal computer is connected with the touch screen display to realize human-computer interaction.
The surgical system 1 of the present invention further comprises a housing, a frame, and casters (not shown in the figure), wherein the cooling tank and control unit 10, the valve box 20, the electric cabinet, the exhaust gas treatment unit 60, the temperature mapping unit 30, and the reflux treatment unit 50 are disposed on the frame, and the casters are disposed below the frame for moving the device; the probe delivery pipe 401 and the return pipe 501 are connected with the valve box 20 by adopting a quick-insertion or other mechanical structure which can be easily detached; the ablation needle 402 is connected with the probe delivery pipe 401 and the return pipe 501 by quick insertion or other mechanical structures which are easy to detach.
In addition, the surgical system 1 of the utility model needs to be careful when in operation,
1. before the operation, the cold working medium liquid adding operation is carried out, and the operation preparation is carried out.
2. When the operation is carried out, the cryoablation is carried out for 5-20 minutes and the thermal ablation is carried out for 5 minutes to serve as a treatment cycle, so that single or multiple treatment cycles can be developed, and tumor cells are killed thoroughly.
3. At the end of the procedure, the ablation needle 402 needs to be removed during the thermal ablation process (thermal ablation can rewarm the ablation needle 402 to melt the frozen puck formed in the tip region of the ablation needle 402 during the cold ablation stage).
4. After the operation is finished, the operation system 1 is pushed to the storage place.
Thus far, it should be recognized by those skilled in the art that while the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (9)
1. A single working medium compound ablation operation system is characterized in that the operation system (1) comprises,
the cold tank and control unit (10) comprises a cold tank (101), and a working medium for treatment is stored in the cold tank (101);
the valve box (20) comprises a first heat exchange device (203), a heat ablation heater (205), a cold valve (202) and a hot valve (201), the cold valve (202) and the hot valve (201) are respectively connected with the cold tank (101), one end of the first heat exchange device (203) is connected with the hot valve (201), and the other end of the first heat exchange device is provided with the heat ablation heater (205);
a probe delivery pipe (401), one end of which is respectively communicated with the cold valve (202) and the heat ablation heater (205) for delivering working medium; and the number of the first and second groups,
an ablation needle (402) connected to the other end of the probe delivery tube (401).
2. The single working medium compound ablation surgical system according to claim 1, wherein the surgical system (1) further comprises, a temperature mapping unit (30) for estimating the temperature situation of the treatment region of the ablation needle, the temperature mapping unit (30) comprises a valve box outlet temperature sensor (301), a valve box outlet pressure sensor (302), a return inlet temperature sensor (303) and a return inlet pressure sensor (304), the valve housing outlet temperature sensor (301) and the valve housing outlet pressure sensor (302) are disposed between the valve housing (20) and the probe delivery tube (401), and is adjacent to the valve box (20), the backflow inlet temperature sensor (303) and the backflow inlet pressure sensor (304) are arranged between the ablation needle (402) and a backflow processing unit (50), the reflux processing unit (50) is in communication with the ablation needle (402).
3. The single working medium compound ablation surgical system according to claim 1, wherein the cold tank and control unit (10) further comprises a cold tank pressure sensor (107), a cold tank pressurization valve (102), a cold tank pressurization fan (103) and a filter (104) connected to the cold tank (101), wherein the filter (104) is disposed in the cold tank (101).
4. The single working medium combined type ablation surgical system as claimed in claim 2, wherein the backflow processing unit (50) comprises a backflow pipe (501) and a backflow heater (503), and the ablation needle (402) and the backflow heater (503) are communicated through the backflow pipe (501).
5. The single working medium compound ablation surgical system as claimed in claim 4, wherein the backflow processing unit (50) further comprises a backflow safety valve (505) connected to the backflow heater (503), and a proportional valve (506) connected in parallel with the backflow safety valve (505), one end of the proportional valve (506) is connected to the backflow heater (503), and a backflow temperature sensor (507) and a backflow pressure sensor (508) are further arranged between the backflow heater (503) and the proportional valve (506).
6. The single working medium composite ablation surgical system according to claim 1, wherein the surgical system (1) further comprises an exhaust gas treatment unit (60), the exhaust gas treatment unit (60) comprises a second heat exchange device (601), and the second heat exchange device (601) is connected with the cold tank (101).
7. The single working medium compound ablation surgical system as claimed in claim 6, wherein the surgical system (1) further comprises a phase separation valve (208), an electrically controlled phase separation valve (209) and a normally open phase separation valve (210), the phase separation valve (208) is connected in series with the electrically controlled phase separation valve (209), and the phase separation valve (208) and the electrically controlled phase separation valve (209) are connected in parallel with the normally open phase separation valve (210); the junction of the electric control phase separation valve (209) and a normally open phase separation valve (210) is connected with the waste gas treatment unit (60), and the junction of the phase separation valve (208) and the normally open phase separation valve (210) is connected with the valve box (20).
8. The single working medium compound ablation surgical system according to any one of claims 1 to 3, wherein the surgical system (1) is further provided with an ablation needle return temperature sensor (403), the ablation needle return temperature sensor (403) being provided at the ablation needle (402).
9. The single working medium compound ablation surgical system of claim 1, wherein the therapeutic ablation working medium is liquid nitrogen.
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