CN113842206B - Alcohol recovery method, device and system for cryoablation surgical equipment - Google Patents
Alcohol recovery method, device and system for cryoablation surgical equipment Download PDFInfo
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- CN113842206B CN113842206B CN202111437487.6A CN202111437487A CN113842206B CN 113842206 B CN113842206 B CN 113842206B CN 202111437487 A CN202111437487 A CN 202111437487A CN 113842206 B CN113842206 B CN 113842206B
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 351
- 238000011084 recovery Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 72
- 238000002679 ablation Methods 0.000 claims abstract description 38
- 230000008859 change Effects 0.000 claims abstract description 8
- 238000005303 weighing Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000002699 waste material Substances 0.000 abstract description 7
- 238000002681 cryosurgery Methods 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 description 8
- 210000004027 cell Anatomy 0.000 description 6
- 230000005855 radiation Effects 0.000 description 6
- 238000010992 reflux Methods 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- 208000035965 Postoperative Complications Diseases 0.000 description 1
- 238000011298 ablation treatment Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000036592 analgesia Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000023597 hemostasis Effects 0.000 description 1
- 230000001900 immune effect Effects 0.000 description 1
- 230000003834 intracellular effect Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000017074 necrotic cell death Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 210000004881 tumor cell Anatomy 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/08—Accessories or related features not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
- B01D5/006—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with evaporation or distillation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
- A61B2018/00041—Heating, e.g. defrosting
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00577—Ablation
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Abstract
The invention discloses an alcohol recovery method, device and system for cryoablation surgical equipment. The method comprises the following steps: adjusting the liquid level of alcohol in an alcohol bottle to keep the alcohol at a preset liquid level; delivering the alcohol to a heater so that the heater heats the alcohol to change the alcohol into gaseous alcohol; wherein the gaseous alcohol exchanges heat in a heat exchange area of the ablation needle to raise the temperature of the tissue of the area to be treated; when the gaseous alcohol is changed into liquid alcohol after heat exchange with the ablation needle, the liquid alcohol flows back to the alcohol recovery bottle through the radiator; and conveying the liquid alcohol in the alcohol recovery bottle to the alcohol bottle. The method can realize that the alcohol recovery device is arranged when the ablation needle is cooled or rewarmed in the cryosurgery, thereby recycling the alcohol, reducing the waste of hot working medium and reducing the operation steps of users.
Description
Technical Field
The invention belongs to the technical field of cryoablation, and particularly relates to an alcohol recovery method, device and system for cryoablation surgical equipment.
Background
Over the years, more and more tissue ablation techniques are in clinical use. Among them, cryoablation is a representative technique, which uses a cryo-apparatus to controllably subject lesion tissues to cooling, freezing and rewarming processes, thereby causing irreversible damage and even necrosis of cells.
Cryoablation is widely applied to tumor treatment, and the purpose of tissue ablation treatment is achieved by killing tumor cells by utilizing freezing. The mechanism of killing cells by cryoablation is: cell dehydration and shrinkage; mechanical damage from intracellular ice crystal formation; concentration of cell electrolyte toxicity and pH change; blood flow stasis and microthrombosis; and immune effects, etc. The cryoablation has the advantages of small operation wound, accurate positioning, hemostasis and analgesia, few postoperative complications, high safety and the like.
In the traditional cryosurgical operation system, the cold/hot working medium is used for cooling or rewarming the ablation needle, and the hot working medium after heat exchange is directly discarded in the rewarming process, so that serious waste is caused; in addition, because the hot working medium cannot be added in the process of the low-temperature cooling operation, a user easily forgets the operation of removing the hot working medium after the operation.
Disclosure of Invention
The invention aims to solve the technical problem of how to avoid waste of hot working medium and reduce the time for preparing for rewarming in the rewarming process. In view of at least one of the above technical problems, the present invention provides an alcohol recovery method, apparatus and system for a cryoablation surgical apparatus.
Adjusting the liquid level of alcohol in an alcohol bottle to keep the alcohol at a preset liquid level;
delivering the alcohol to a heater so that the heater heats the alcohol to change the alcohol into gaseous alcohol; wherein the gaseous alcohol exchanges heat in a heat exchange area of the ablation needle to raise the temperature of the tissue of the area to be treated;
when the gaseous alcohol is changed into liquid alcohol after heat exchange with the ablation needle, the liquid alcohol flows back to the alcohol recovery bottle through the radiator;
and conveying the liquid alcohol in the alcohol recovery bottle to the alcohol bottle.
According to an embodiment of the present invention, preferably, wherein before supplying the alcohol to the heater, the alcohol heating method further comprises:
collecting the current temperature in the heater;
and when the current temperature in the heater is higher than the preset temperature, closing the hot working medium output proportional valve, and then conveying alcohol to the heater.
According to an embodiment of the present invention, before supplying the alcohol to the heater, the alcohol heating method preferably includes:
collecting a current pressure in the heater;
and when the current pressure in the heater is greater than the preset pressure, opening the hot working medium output proportional valve, and then continuously conveying alcohol to the heater.
According to an embodiment of the present invention, preferably, when the gaseous alcohol is changed into liquid alcohol after heat exchange with the ablation needle, the refluxing of the liquid alcohol to an alcohol recovery bottle through a heat sink includes:
when the temperature of the radiator is within a first preset temperature range, opening a first preset number of radiating fans of the radiator, and adjusting a thermal working medium output proportional valve to a first opening degree;
when the temperature of the radiator is within a second preset temperature range, adjusting the opening degree of the hot working medium output proportional valve to a second opening degree;
and when the temperature of the radiator is within a third preset temperature range, adjusting the opening degree of the thermal working medium output proportional valve to a third opening degree, and opening a second preset number of radiating fans of the radiator.
According to the embodiment of the present invention, preferably, the calculation formula of the second opening degree is as follows:
wherein T represents the current temperature of the radiator; k represents a second opening degree; a is a fan power influence factor, and the value range of a is 1-30; b is a temperature influence factor, and the value of b is an integer greater than or equal to 1.
In a second aspect, the present invention provides an alcohol recovery device, comprising:
the weighing sensor is used for weighing the alcohol in the alcohol bottle so as to determine the liquid level of the alcohol;
the alcohol bottle is used for containing alcohol;
a alcohol pump for extracting the alcohol from the alcohol bottle so that the alcohol is delivered to a heater through a conduit;
the two-position three-way valve is used for controlling the alcohol to be conveyed to the heater in the rewarming process, and conveying the liquid alcohol in the alcohol recovery bottle to the alcohol bottle after the operation is finished;
the heater is used for heating the alcohol, so that the heated alcohol is subjected to heat exchange in the heat exchange area of the ablation needle, and the temperature of the tissue in the area to be treated is increased;
a radiator for converting the alcohol which becomes gaseous after heating into liquid alcohol;
the alcohol recovery bottle is used for containing the liquid alcohol;
the controller is respectively connected with the weighing sensor, the two-position three-way valve, the heater and the radiator;
the controller is configured to:
adjusting the liquid level of alcohol in an alcohol bottle to keep the alcohol at a preset liquid level;
delivering the alcohol to a heater so that the heater heats the alcohol to change the alcohol into gaseous alcohol; wherein the gaseous alcohol exchanges heat in a heat exchange area of the ablation needle to raise the temperature of the tissue of the area to be treated;
when the gaseous alcohol is changed into liquid alcohol after heat exchange with the ablation needle, the liquid alcohol flows back to the alcohol recovery bottle through the radiator;
and conveying the liquid alcohol in the alcohol recovery bottle to the alcohol bottle.
According to an embodiment of the present invention, preferably, the alcohol recovery apparatus further includes:
the temperature sensor is used for acquiring the current temperature in the heater;
the hot working medium output proportional valve is used for adjusting the output proportion of the heated alcohol;
correspondingly, the controller is connected with the temperature sensor, and the controller is further used for: and when the current temperature in the heater is higher than the preset temperature, closing the hot working medium output proportional valve, and then conveying alcohol to the heater.
According to an embodiment of the present invention, preferably, the alcohol recovery apparatus further includes:
the pressure sensor is used for acquiring the current pressure in the heater;
accordingly, the controller is connected to the pressure sensor, the controller further configured to: and when the current pressure in the heater is greater than the preset pressure, opening the hot working medium output proportional valve, and then continuously conveying alcohol to the heater.
According to the embodiment of the present invention, preferably, the controller is further configured to:
when the temperature of the radiator is within a first preset temperature range, opening a first preset number of radiating fans of the radiator, and adjusting a thermal working medium output proportional valve to a first opening degree;
when the temperature of the radiator is within a second preset temperature range, adjusting the opening degree of the hot working medium output proportional valve to a second opening degree;
and when the temperature of the radiator is within a third preset temperature range, adjusting the opening degree of the thermal working medium output proportional valve to a third opening degree, and opening a second preset number of radiating fans of the radiator.
In a third aspect, the present invention provides an alcohol recovery system for a cryoablation surgical apparatus, comprising an alcohol recovery device for a cryoablation surgical apparatus as described above.
Compared with the prior art, one or more embodiments in the above scheme can have the following advantages or beneficial effects: firstly, adjusting the liquid level of alcohol in an alcohol bottle to keep the alcohol at a preset liquid level, then conveying the alcohol to a heater to heat the alcohol by the heater to change the alcohol into gaseous alcohol, wherein the gaseous alcohol performs heat exchange in a heat exchange area of an ablation needle to raise the temperature of tissue in a region to be treated, and when the gaseous alcohol is changed into liquid alcohol after the heat exchange with the ablation needle, the liquid alcohol flows back to an alcohol recovery bottle through a radiator to convey the liquid alcohol in the alcohol recovery bottle to the alcohol bottle. By applying the method of the invention, because the heater is heated to the target temperature in advance, the alcohol can be quickly changed into gaseous state by filling the alcohol into the heater, the rapid rewarming can be realized (compared with the mode of directly placing the heater in an alcohol container in the prior art), in addition, the alcohol recovery device can be arranged during the cooling or rewarming of the ablation needle in the cryosurgery, the alcohol can be recycled, the waste of hot working medium can be reduced, and the operation steps of a user can also be reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 illustrates a flow chart of an alcohol recovery method for a cryoablation surgical device in accordance with a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of an alcohol recovery device for a cryoablation surgical apparatus according to a second embodiment of the present invention.
Reference numerals:
201-alcohol bottle; 202-a load cell; 203-alcohol pump; 204-a first two-position three-way valve; 205-a second two-position, three-way valve; 206-a heater; 207-temperature sensor; 208-a pressure sensor; 209-thermal working medium output proportional valve; 210-a heat sink; 211-alcohol recovery bottle.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
Example one
In order to solve the technical problems in the prior art, embodiments of the present invention provide an alcohol recovery method for a cryoablation surgical apparatus. Fig. 1 shows a flowchart of the alcohol recovery method for a cryoablation surgical apparatus, and referring to fig. 1, the alcohol recovery method of the present embodiment includes the following steps:
s101, adjusting the liquid level of alcohol in the alcohol bottle to keep the alcohol at a preset liquid level.
Generally, alcohol refers to liquid alcohol which is more commonly used in medicine, unless otherwise specified. The term "gaseous alcohol" is used herein to refer specifically to alcohol when it is heated to become gaseous alcohol.
In the case where the thermal medium includes alcohol, the alcohol is generally recovered after the operation or the temperature adjustment process of the ablation needle is completed.
The method for determining the alcohol liquid level can place a weighing sensor below an alcohol bottle to weigh alcohol in real time. For example, during surgery, the required alcohol level is between 50 ml and 200 ml, and below 50 ml, the operation cannot be performed, and the alcohol level corresponds to the alcohol weight of between 50g and 450 g. The weight of the alcohol bottle is 200g, if the total weight of the alcohol bottle is detected to be lower than 250 g, the liquid level is insufficient, the user is prompted to need to add alcohol, and if the total weight of the alcohol bottle is detected to be higher than 650g, the liquid level is full, and the user is prompted to pour alcohol.
S102, conveying the alcohol to a heater to enable the heater to heat the alcohol and enable the alcohol to be changed into gaseous alcohol; wherein, the gaseous alcohol carries out heat exchange in the heat exchange area of the ablation needle, so that the temperature of the tissue of the area to be treated is increased.
In specific implementation, a spirit pump can be arranged at the bottle mouth of the alcohol bottle so as to realize the transportation of alcohol to the heater. The alcohol is heated in the heater and then changed into gaseous alcohol, and simultaneously, the temperature in the heater is increased, so that the internal pressure is increased, and the gaseous alcohol with certain pressure can flow through the ablation needle heat exchange area and then rewarming the target tissue.
S103, when the gaseous alcohol is changed into liquid alcohol after heat exchange with the ablation needle, the liquid alcohol flows back to the alcohol recovery bottle through the radiator.
The temperature of melting needle is less than gaseous alcohol's temperature, and gaseous alcohol can become liquid alcohol after gaseous alcohol and the heat transfer of melting needle, and liquid alcohol can flow to the alcohol recovery bottle at this moment. In order to ensure that liquid alcohol is filled in the conduit during backflow, a radiator can be arranged to ensure that the alcohol can be completely changed into liquid to flow into the alcohol recovery bottle.
In another embodiment of the invention, at the beginning of rewarming, the opening of the cold working medium output proportional valve is controlled to be reduced to 0, the opening of the hot working medium output proportional valve is controlled to be increased to 100%, and the two-position three-way valve is adjusted to enable alcohol to be conveyed to the heater from the alcohol bottle. However, in the rewarming process, the amount of the gaseous alcohol which flows back to the radiator is large, so that the gaseous alcohol cannot be completely changed into a liquid state, and the problem of reducing the recovery rate of the alcohol is caused. Therefore, the invention can adjust the heat radiation performance of the radiator by opening or closing the heat radiation fan of at least one radiator and adjust the opening degree of the thermal working medium output proportional valve to adjust the heat radiation efficiency so as to improve the recovery rate of the alcohol. Specifically, when the gaseous alcohol is changed into liquid alcohol after the heat exchange with the ablation needle is performed, the liquid alcohol is caused to flow back to an alcohol recovery bottle through a heat sink, and the method includes: a1, when the temperature of the radiator is in a first preset temperature range, opening a first preset number of radiator fans of the radiator, and adjusting the hot working medium output proportional valve to a first opening degree; a2, when the temperature of the radiator is in a second preset temperature range, adjusting the opening degree of the hot working medium output proportional valve to a second opening degree; and A3, when the temperature of the radiator is within a third preset temperature range, adjusting the opening of the hot working medium output proportional valve to a third opening, and opening a second preset number of cooling fans of the radiator.
In one specific embodiment, the first predetermined temperature range is: t is not less than 25 DEG C1<35 ℃, and the second preset temperature range is as follows: t is not less than 35 DEG C2<50 ℃, and the third preset temperature range is as follows: t is not less than 50 DEG C3. The specific control process is as follows:
when the temperature of the radiator is more than or equal to T at 25 DEG C1<When the temperature is within the range of 35 ℃, 1 heat radiation fan of the radiator is opened, and the thermal working medium output proportional valve is adjusted to a first opening degree, such as 90%, at this time, the temperature is not particularly high, so that only a small number of heat radiation fans need to be opened, such as 1 heat radiation fan, and at this time, the first opening degree of the thermal working medium output proportional valve can be a fixed value.
When the temperature of the radiator is more than or equal to 35 ℃ and less than or equal to T2<In the range of 50 ℃, because the quantity of the gaseous alcohol is large, the temperature of the radiator is increased quickly, so that the output of the hot working medium needs to be reduced, the quantity of the gaseous alcohol needs to be reduced, and at the moment, the opening degree of the hot working medium output proportional valve needs to be reduced. It is noted that when the temperature of the radiator is 35 ℃ ≦ T2<In the range of 50 deg.c, the temperature is raised but not too high, so that the second opening of the hot working medium output proportional valve may be regulated to control the output of the hot working medium properly. During fine adjustment, the second opening degree of the hot working medium output proportional valve can be finely adjusted according to the current temperature of the radiator. Wherein, the calculation formula of the second opening degree is as follows:
wherein T represents the current temperature of the radiator; k represents a second opening degree; a is a fan power influence factor, and the value range of a is 1-30; b is a temperature influence factor, and the value of b is an integer greater than or equal to 1. Wherein, a and b are empirical parameters measured according to experiments, for example, when the fan power is 12W, a may be 3.98, and if the current temperature of the radiator is 38 ℃, b may be 2. In addition, K ranges from 0 to 0.9.
Where a increases with increasing fan power and b increases with increasing current temperature of the heat sink. Wherein, a and b are empirical parameters measured according to experiments, for example, when the fan power is 12W, a may be 3.98, and if the current temperature of the radiator is 38 ℃, b may be 2. In addition, K ranges from 0 to 0.9.
When the temperature of the radiator is more than or equal to 50 ℃ and less than or equal to T3Within the range, the amount of the gaseous alcohol is very large, so that the temperature of the radiator is very high, and the temperature of the gaseous alcohol needs to be rapidly reduced, so that the opening degree of the hot working medium output proportional valve can be reduced to a third opening degree, for example, 5%, and all the cooling fans of the radiator, for example, 3 cooling fans, are simultaneously turned on. The above embodiments are merely exemplary, and in practical implementation, each numerical value may be adjusted according to actual situations.
S104, conveying the liquid alcohol in the alcohol recovery bottle to the alcohol bottle.
When the embodiment of the invention is implemented, whether the alcohol in the alcohol recovery bottle is completely delivered into the alcohol bottle can be detected. Specifically, in the alcohol recovery process, the total weight of the alcohol bottle is weighed by the weighing sensor, and when the total weight of the alcohol bottle is not increased any more and the state of no weight increase is maintained for a period of time, for example, 2 minutes or more, the alcohol recovery is considered to be completed.
In other embodiments of the invention, the temperature of the heater can be detected in real time, and the on-off states of the heater, the alcohol pump and related valves can be controlled according to the temperature of the heater. When the heater temperature reached 120 ℃, open alcohol pump, two three-way valve alcohol filling passageways, with alcohol filling to the heater inside, the heater continues to heat, when the heater temperature reached 150 ℃, closed the heater, concrete step includes: a, collecting the current temperature in the heater; and B, when the current temperature in the heater is higher than the preset temperature, closing the hot working medium output proportional valve, closing the alcohol pump, and then stopping conveying alcohol to the heater.
In other embodiments of the present invention, the pressure of the heater can be detected in real time, and the output ratio of the thermal working medium can be adjusted according to the pressure. The method comprises the following specific steps: n, collecting the current pressure in the heater; and O, when the current pressure in the heater is greater than the preset pressure, opening the hot working medium output proportional valve, then continuously conveying alcohol to the heater, and simultaneously keeping the opening states of the alcohol pump and the two-position three-way valve alcohol filling channels so that the alcohol can enter the continuous heating state of the heater.
In other embodiments, when the ablation needle is rewarming, the temperature of the ablation needle needs to be detected in real time, a plurality of temperature measurement needles can be inserted into the surrounding tissue of the ablation needle according to the actual operation requirement so as to monitor the temperature of the surrounding tissue in real time, and the temperature of the ablation needle can be adjusted according to the temperature feedback. The method comprises the following specific steps: p, detecting whether the reflux temperature of the needle tip of the ablation needle is within a preset temperature range; and Q, if the temperature is not within the preset temperature range, adjusting the hot working medium output proportional valve to enable the reflux temperature to reach the preset temperature range.
The method can realize that the alcohol recovery device is arranged when the ablation needle is cooled or rewarmed in the cryosurgery, thereby recycling the alcohol, reducing the waste of hot working medium and reducing the operation steps of users.
In order to solve the technical problems in the prior art, the embodiment of the invention also provides an alcohol recovery device for the cryoablation surgical equipment. As shown in fig. 2, the alcohol recovery apparatus of the present embodiment includes:
a weighing sensor 202 for weighing the alcohol in the alcohol bottle 201 to determine the level of the alcohol;
an alcohol bottle 201 for containing alcohol;
a alcohol pump 203 for extracting the alcohol in the alcohol bottle 201 so that the alcohol is delivered to a heater 206 through a pipe;
the two-position three-way valve is used for controlling the alcohol to be conveyed to the heater 206 in the rewarming process, and conveying the liquid alcohol in the alcohol recovery bottle 211 to the alcohol bottle 201 after the operation is finished;
the heater 206 is used for heating the alcohol, so that the heated alcohol is subjected to heat exchange in the heat exchange area of the ablation needle, and the temperature of the tissue in the area to be treated is increased;
a heat sink 210 for converting the alcohol changed into a gaseous state after heating into liquid alcohol;
an alcohol recovery bottle 211 for containing the liquid alcohol;
a controller (not shown) connected to the load cell 202, the two-position three-way valve, the heater 206, and the heat sink 210;
the controller is configured to:
adjusting the liquid level of alcohol in the alcohol bottle 201 to keep the alcohol at a preset liquid level;
delivering the alcohol to a heater 206 in a gaseous state, so that the heater 206 heats the alcohol to change the alcohol into gaseous alcohol; wherein the gaseous alcohol exchanges heat in a heat exchange area of the ablation needle to raise the temperature of the tissue of the area to be treated;
when the gaseous alcohol is changed into liquid alcohol after heat exchange with the ablation needle, the liquid alcohol is refluxed to the alcohol recovery bottle 211 through the radiator 210;
the liquid alcohol in the alcohol recovery bottle 211 is transferred to the alcohol bottle 201.
Further, the alcohol recovery device further comprises:
a temperature sensor 207 for acquiring a current temperature within the heater 206;
a hot working medium output proportional valve 209 for adjusting the output proportion of the heated alcohol;
accordingly, the controller is connected to the temperature sensor 207, and the controller is further configured to: when the current temperature in the heater 206 is higher than the preset temperature, the hot working medium output proportional valve 209 is closed, and then alcohol is delivered to the heater 206.
Further, the alcohol recovery device further comprises:
a pressure sensor 208 for acquiring the current pressure in the heater 206;
accordingly, the controller is connected to the pressure sensor 208, and the controller is further configured to: when the current pressure in the heater 206 is greater than the preset pressure, the hot working medium output proportional valve 209 is opened, and then alcohol is continuously delivered to the heater 206.
In an embodiment of the present invention, with reference to fig. 2, a schematic structural diagram of an alcohol recovery device is shown.
The alcohol recovery device comprises an alcohol bottle 201, a weighing sensor 202, an alcohol pump 203, a first two-position three-way valve 204, a second two-position three-way valve 205, a heater 206, a temperature sensor 207, a pressure sensor 208, a hot working medium output proportional valve 209, a radiator 210, an alcohol recovery bottle 211 and the like. Wherein, alcohol bottle 201 is used for splendid attire alcohol, and this alcohol bottle 201 is non-metallic transparent material, can follow the outward appearance and observe the alcohol liquid level. The bottom of the alcohol bottle 201 is provided with a weighing sensor 202, in the process of operation preparation, the system sends an instruction, the weight of alcohol in the alcohol bottle 201 is monitored through the weighing sensor 202 in real time, and if the total weight of the alcohol bottle 201 is detected to be lower than the preset weight, for example, 250 grams (200 grams of net weight of the alcohol bottle 201), the liquid level is indicated to be insufficient, and the user is prompted to need to add alcohol. If the total weight of the alcohol bottle 201 is detected to exceed 650g (the net weight of the alcohol bottle 201 is 200 g), the liquid level is full, and the user is prompted to pour the alcohol. Two guide pipes are arranged at the upper end of the alcohol bottle 201 and connected with the alcohol bottle 201, and the two guide pipes respectively play roles in extracting alcohol and refluxing alcohol. An alcohol pump 203 is arranged between the first two-position three-way valve 204 and the second two-position three-way valve 205, the alcohol pump 203 is an explosion-proof one-way high-pressure pump, and liquid flow can only flow from the first two-position three-way valve 204 to the second two-position three-way valve 205 after being pumped by the first two-position three-way valve 204. One of the passages of the second two-position three-way valve 205 is connected to the heater 206 through a pipe, and after the alcohol pump 203 pumps up the alcohol, the alcohol is transferred to the heater 206. The other channel of the second two-position three-way valve 205 is connected with the alcohol bottle 201 through a conduit, the other channel of the first two-position three-way valve 204 is connected with the alcohol recovery bottle 211 through a conduit, and when the two channels are opened and the alcohol pump 203 is opened at the same time, the alcohol in the alcohol recovery bottle 211 can be conveyed back to the alcohol bottle 201. A temperature sensor 207 and a pressure sensor 208 are arranged inside the heater 206, and corresponding logic actions can be performed according to feedback values of the temperature sensor 207 and the pressure sensor 208, for example, a thermal working medium output proportional valve 209 is adjusted. The heater 206 is further connected to a heat sink 210 through a conduit, and when the thermal working medium (mainly gaseous alcohol) is subjected to heat exchange at the needle tip of the ablation needle, the thermal working medium is changed into gas-liquid mixed alcohol, flows through the heat sink 210, is completely changed into liquid alcohol, and flows back into the alcohol recovery bottle 211 to complete alcohol recovery.
The main function of the alcohol recovery device is to provide a hot working medium with a certain pressure, and simultaneously, the output power of the heater 206 is adjusted according to the temperature feedback in the cold tank, so that closed-loop control is realized. The heated alcohol can be recovered by the alcohol recovery device, and the recovered alcohol can be drawn back into the alcohol bottle 201 and can be repeatedly recycled.
The method can realize that the alcohol recovery device is arranged when the ablation needle is cooled or rewarmed in the cryosurgery, thereby recycling the alcohol, reducing the waste of hot working medium and reducing the operation steps of users.
Further, the controller is further configured to:
detecting whether the reflux temperature of the needle tip of the ablation needle is within a preset temperature range;
if the temperature is not within the preset temperature range, the hot working medium output proportional valve is adjusted to enable the reflux temperature to reach the preset temperature range.
Further, the controller is further configured to:
when the temperature of the radiator is within a first preset temperature range, opening a first preset number of radiating fans of the radiator, and adjusting a thermal working medium output proportional valve to a first opening degree;
when the temperature of the radiator is within a second preset temperature range, adjusting the opening degree of the hot working medium output proportional valve to a second opening degree;
and when the temperature of the radiator is within a third preset temperature range, adjusting the opening degree of the thermal working medium output proportional valve to a third opening degree, and opening a second preset number of radiating fans of the radiator.
The embodiment can realize the temperature fine adjustment of the ablation needle in the cooling and rewarming processes, and simultaneously can also recover the hot working medium so as to avoid the waste of resources.
To solve the above technical problems in the prior art, the embodiment of the present invention also provides an alcohol recovery system for a cryoablation surgical apparatus, which includes the device according to the embodiment shown in fig. 2.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A method of alcohol recovery for a cryoablation surgical device, the method comprising:
adjusting the liquid level of alcohol in an alcohol bottle to keep the alcohol at a preset liquid level;
delivering the alcohol to a heater so that the heater heats the alcohol to change the alcohol into gaseous alcohol; wherein the gaseous alcohol exchanges heat in a heat exchange area of the ablation needle to raise the temperature of the tissue of the area to be treated;
when the gaseous alcohol is changed into liquid alcohol after heat exchange with the ablation needle, the liquid alcohol flows back to the alcohol recovery bottle through the radiator;
when the temperature of the radiator is within a second preset temperature range, adjusting the opening degree of the hot working medium output proportional valve to a second opening degree;
the calculation formula of the second opening degree is as follows:
wherein T represents the current temperature of the radiator; k represents a second opening degree; a is a fan power influence factor, and the value range of a is 1-30; b is a temperature influence factor, and the value of b is an integer greater than or equal to 1;
and conveying the liquid alcohol in the alcohol recovery bottle to the alcohol bottle.
2. The alcohol recovery method for a cryoablation surgical apparatus of claim 1, wherein prior to delivering the alcohol to the heater, the method further comprises:
collecting the current temperature in the heater;
and when the current temperature in the heater is higher than the preset temperature, closing the hot working medium output proportional valve, and then conveying alcohol to the heater.
3. The alcohol recovery method for a cryoablation surgical apparatus of claim 1, prior to delivering the alcohol to the heater, comprising:
collecting a current pressure in the heater;
and when the current pressure in the heater is greater than the preset pressure, opening the hot working medium output proportional valve, and then continuously conveying alcohol to the heater.
4. The alcohol recovery method for a cryoablation surgical apparatus as recited in claim 1, wherein the returning of the liquid alcohol to the alcohol recovery flask through a heat sink when the gaseous alcohol is changed into liquid alcohol after heat exchange with the ablation needle comprises:
when the temperature of the radiator is within a first preset temperature range, opening a first preset number of radiating fans of the radiator, and adjusting a thermal working medium output proportional valve to a first opening degree;
and when the temperature of the radiator is within a third preset temperature range, adjusting the opening degree of the thermal working medium output proportional valve to a third opening degree, and opening a second preset number of radiating fans of the radiator.
5. An alcohol recovery device for a cryoablation surgical apparatus, the alcohol recovery device comprising:
the weighing sensor is used for weighing the alcohol in the alcohol bottle so as to determine the liquid level of the alcohol;
the alcohol bottle is used for containing alcohol;
a alcohol pump for extracting the alcohol from the alcohol bottle so that the alcohol is delivered to a heater through a conduit;
the two-position three-way valve is used for controlling the alcohol to be conveyed to the heater in the rewarming process, and conveying the liquid alcohol in the alcohol recovery bottle to the alcohol bottle after the operation is finished;
the heater is used for heating the alcohol, so that the heated alcohol is subjected to heat exchange in the heat exchange area of the ablation needle, and the temperature of the tissue in the area to be treated is increased;
a radiator for converting the alcohol which becomes gaseous after heating into liquid alcohol;
the alcohol recovery bottle is used for containing the liquid alcohol;
the controller is respectively connected with the weighing sensor, the two-position three-way valve, the heater and the radiator;
the controller is configured to:
adjusting the liquid level of alcohol in an alcohol bottle to keep the alcohol at a preset liquid level;
delivering the alcohol to a heater so that the heater heats the alcohol to change the alcohol into gaseous alcohol; wherein the gaseous alcohol exchanges heat in a heat exchange area of the ablation needle to raise the temperature of the tissue of the area to be treated;
when the gaseous alcohol is changed into liquid alcohol after heat exchange with the ablation needle, the liquid alcohol flows back to the alcohol recovery bottle through the radiator;
when the temperature of the radiator is within a second preset temperature range, adjusting the opening degree of the hot working medium output proportional valve to a second opening degree;
the calculation formula of the second opening degree is as follows:
wherein T represents the current temperature of the radiator; k represents a second opening degree; a is a fan power influence factor, and the value range of a is 1-30; b is a temperature influence factor, and the value of b is an integer greater than or equal to 1;
and conveying the liquid alcohol in the alcohol recovery bottle to the alcohol bottle.
6. The alcohol recovery device according to claim 5, further comprising:
the temperature sensor is used for acquiring the current temperature in the heater;
the hot working medium output proportional valve is used for adjusting the output proportion of the heated alcohol;
correspondingly, the controller is connected with the temperature sensor, and the controller is further used for: and when the current temperature in the heater is higher than the preset temperature, closing the hot working medium output proportional valve, and then conveying alcohol to the heater.
7. The alcohol recovery device according to claim 6, further comprising:
the pressure sensor is used for acquiring the current pressure in the heater;
accordingly, the controller is connected to the pressure sensor, the controller further configured to: and when the current pressure in the heater is greater than the preset pressure, opening the hot working medium output proportional valve, and then continuously conveying alcohol to the heater.
8. The alcohol recovery device of claim 5, wherein the controller is further configured to:
when the temperature of the radiator is within a first preset temperature range, opening a first preset number of radiating fans of the radiator, and adjusting a thermal working medium output proportional valve to a first opening degree;
and when the temperature of the radiator is within a third preset temperature range, adjusting the opening degree of the thermal working medium output proportional valve to a third opening degree, and opening a second preset number of radiating fans of the radiator.
9. An alcohol recovery system for a cryoablation surgical apparatus comprising the alcohol recovery device for a cryoablation surgical apparatus according to any one of claims 5 to 8.
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