CN205626096U - Adjust atmospheric pressure and realize freezing surgery device freezing and rewarming - Google Patents

Abstract

The utility model discloses an adjust atmospheric pressure and realize freezing surgery device freezing and rewarming, including high pressurized air source, high -pressure voltage limiting valve, freezing gas main and freezer unit for the throttle is freezing, the high -pressure gas who follows the high -pressurepipe reposition of redundant personnel transports to the freezer unit through the pyrogenicity gas main and is used for shunting rewarming after reposition of redundant personnel solenoid valve and the voltage limiting of low pressure voltage limiting valve, , transport to the freezer unit through heated gas body house steward and be used for low pressure rewarming after low pressure solenoid valve and the voltage limiting of low pressure voltage limiting valve from hanging down the pressurized air source, be provided with gas heater on the heated gas body house steward, it is gaseous to preheat low pressure rewarming, realizes controllable heating function. The utility model discloses correct throttling refrigeration type gas and can only be used for freezing this technology bias, utilize freezing gaseous residual air of high pressure and low pressure gas to heat up, solved a rewarming difficult problem and the extravagant problem of low -temperature working mediums of the freezing surgery equipment of gaseous throttle type, realize freezing, three kinds of functions of rewarming and heating.

Description

A kind of air pressure that regulates realizes the freezing and Cryo-surgical apparatus of rewarming

Technical field

This utility model relates to the medical apparatus and instruments of cryosurgery treatment, it is characterized in that realizing cold by regulation gas pressure Freeze, rewarming and the gas throttling refrigeration type cryosurgery apparatus of heating function.

Background technology

Cryosurgery treatment is to utilize ultralow temperature to damage and the method for ablation lesion tissue, is also to make the earliest in human history Pathological tissues ablation techniques.From nineteen sixty American Psychiatry surgeon Irving Cooper and engineer Arnold Lee Utility model probe shape liquid nitrogen freezing apparatus after freezing cerebral tissue, uses liquid nitrogen as cryogenic fluid (coolant), reclaims And heated nitrogen is applied to treating various tumor as the liquid nitrogen freezing surgical device of high temperature refrigerant (heating agent).But liquid nitrogen freezing Equipment complexity heaviness, operating difficulties and curative effect be not good enough once made cryosurgery treatment sink into pause for a long time and decline.From generation nineteen ninety Rise, the utility model of gas throttling type freezing Surgery Systems based on Joule-Thomson principle and extensively application, make freezing Surgery regains the accreditation of medical circle, has brought back to life freezing technique of surgical treatment.Such as use high pressure argon gas freezing and general The argon helium knife of pressure helium rewarming is by oncology, Invasive Technology Department, Urology Surgery, thoracic surgery, Genneral Surgery, Pneumology Department, Gastroenterology dept. etc. Clinical department uses, for various good evils such as hepatocarcinoma, pulmonary carcinoma, cancer of pancreas, carcinoma of prostate, tumor of kidney, bone tumor, soft tissue neoplasms Property entity tumor cryoablation treatment.

Cryogenic fluid is transported to target tissue and it is carried out the freezing named cryoprobe of device by this utility model.In freezing Surgery research is with practice, and cryoprobe is also referred to as cryoprobe, frozen probe rod, cryoprobe, cryoprobe, freezing sacculus, freezing electricity Pole, super cold surery device, cryoprobe, cryotip or cryoneedle etc..

Cryosurgery treatment technology needs quick freezing and rewarming defrosting the two aspect.According to its operation principle and use Cryogenic fluid (coolant), main freezing mode has:

(1) liquid gasification type: use the freezing mode that cryogenic liquid (such as liquid nitrogen etc.) absorbs heat as cryogenic fluid gasification, as Liquid nitrogen freezing equipment.The cryogenic liquid that the advantage of this kind of freezing mode is common easily obtains, and with low cost.Shortcoming is fortune Defeated inconvenient with storage, equipment volume is huge and heavy；During cryogenic liquid is by equipment connecting tube output to cryoprobe, must Heat insulation layer is protected, and pipeline and cryoprobe are thick stiff；And because cryoprobe often has " gas blocks up " to need stop in art and reset equipment Problem.Meanwhile, it is freezing initial slow and freezing rate is low, causes cell dehydration to affect refrigerating effect and local relapse height Problem.

(2) gas throttling type: utilize the Joule-Thomson throttle effect of gases at high pressure to produce the freezing mode of low temperature, as Argon helium knife uses compressed gas as the equipment of cryogenic fluid with other.Its advantage be use gas at normal temperature, air shooter and Cryoprobe bar is not required to insulated heat, it is to avoid the splash of freezing liquid, leakage and cold injury；Controllability speed good, easy to operate, freezing Degree is fast, cryoprobe diameter is thin.Its shortcoming is that frozen gas operating pressure is high, and causes cryogenic fluid to be wasted very because pressure declines Greatly.Generally use 40 liters of argon bottles of full bottle pressure 35MPa such as argon helium knife, time freezing, argon minimum operating pressure is 20MPa, often Bottle can only use 1～1.5 hour, and the argon restriction effect less than 20MPa drastically reduces, several without refrigerating effect.Consideration equipment Dividing potential drop own, when gas cylinder output pressure is less than 21MPa, the pressure of equipment output to cryoprobe will be less than 20MPa, can only discard； Namely whole bottle gas only about 40% can utilize, 60% must discard.This brings and produces greatly, transport and use wave Take.

The rewarming of freezing equipment or heating function be realize modern cryosurgery generally acknowledge " freezing-rewarming-again is freezing-again Rewarming Two-way Cycle " therapeutic modality and exit function necessary to cryoprobe from freezing tissue.According to high temperature refrigerant (heating agent) Kind and method, main rewarming mode has:

(1) low-pressure gas heated is passed through cryoprobe, utilizes conduction of heat, directly heats inside cryoprobe, such as liquid nitrogen freezing The rewarming of equipment.The advantage of this kind of rewarming mode is with low cost, technology maturation.It is extra that shortcoming is that liquid nitrogen plant needs to be equipped with Gas reclaims, compresses, stores and heater, and volume is relatively big, structure is complicated and rewarming speed is slower.

(2) utilize be placed in cryoprobe electric heating, radio frequency, microwave, the heat-producing unit such as laser heating rewarming.Its advantage is not Need to use or less use gas.Its shortcoming is that rewarming speed is relatively slow, and need directly to contact the inputs such as electric current tissue, Inside the cryoprobe that temperature is extremely low, produce special electric shock and electromagnetic interference equivalent risk.

(3) gas of throttle effect heat production direct heat production in cryoprobe under room temperature is utilized, as argon helium knife uses helium multiple Temperature (helium reversal temperature is 40K, throttling expansion heat release under room temperature).This kind of rewarming mode brings the rewarming being exceedingly fast and response speed Degree, controllability is good, and simple in construction, it is not necessary to extra means.But the helium that shortcoming is rewarming belongs to expensive rare gas, depends on Relying import, price is about 8～10 times of commensurability argon at the same level, and cost is the highest；Helium heats up limited in one's ability simultaneously, only up to reach To about 320K.

Utility model content

For above-mentioned prior art, this utility model provides a kind of air pressure that regulates to realize the freezing and cryosurgery dress of rewarming Put, utilize regulation and control throttling refrigeration type gas pressure to realize the multiple mild heat merit of gases at high pressure freezing, high pressure residual air and low-pressure gas Can, it is possible to resolve the cryogenic fluid huge waste of gas throttling type cryosurgery apparatus and a rewarming difficult problem.

A kind of air pressure that regulates that the utility model proposes realizes the freezing and Cryo-surgical apparatus of rewarming, freezing including high pressure Gas circuit, low-pressure heating gas circuit, shunting gas circuit and assembly A, described high pressure freezing gas circuit includes and high-pressure air source gas outlet successively phase Gases at high pressure input pipe even and frozen gas house steward, described gases at high pressure input pipe is provided with the first air gauge and the first pressure regulation Valve, described gases at high pressure input pipe is provided with high-pressure limiting valve with the junction of described frozen gas house steward；Described low-pressure heating gas Road includes the low-pressure gas input pipe being sequentially connected with low-pressure gas source gas outlet, conflux trachea and heating gas main, described low On pressure gas inlet pipe, from the gas outlet of described low-pressure gas source, the end to described low-pressure gas input pipe is sequentially provided with the second gas Pressure table, the second pressure regulator valve and low-voltage solenoid valve, described in the conflux junction of trachea and described heating gas main be provided with low voltage limit Pressure valve；It is provided with on pipeline section between described first pressure regulator valve and described high-pressure limiting valve on described gases at high pressure input pipe One threeway, end and the junction between trachea of confluxing of described low-pressure gas input pipe are provided with the second threeway；Described first threeway Being connected with between described second threeway and have a shunting trachea, described shunting trachea is provided with solenoid diverter valve；Described assembly A connects Steam is added described in the end of the described frozen gas house steward in described high pressure freezing gas circuit and described low-pressure heating gas circuit Between the end of body house steward；Described assembly A includes and the end of described frozen gas house steward and the end of described heating gas main The cryoprobe appendix that end is connected, described cryoprobe appendix is connected by one the 3rd threeway cryoprobe air inlet pipe, described cold The end connection freezing device air inlet pipe has cryoprobe；On described cryoprobe appendix and be positioned at described frozen gas house steward's end and institute State the pipeline section between the 3rd threeway and be provided with cryoprobe freezing electromagnetic valve, on described cryoprobe appendix and described in being positioned at, add steam Pipeline section between end and described 3rd threeway of body house steward is provided with cryoprobe heating electromagnetic valve.

Further, in described low-pressure heating gas circuit, between described low voltage limit pressure valve and cryoprobe heating electromagnetic valve Pipeline section be provided with gas heater.

It is parallel with multiple assembly A between end and the end of described heating gas main of described frozen gas house steward.

Described cryoprobe is the gas throttling refrigeration type freezing utilizing the Joule-Thomson throttle effect of gas to produce low temperature Device.

Gas in described high-pressure air source is throttling refrigeration type gas, as argon, nitrogen, oxygen, air, carbon dioxide and A kind of or wherein mutual several gases that chemical reaction does not occur mixed gas in nitrous oxide gas；Described high pressure gas The pressure in source is 0.1MPa～100Mpa；The pressure of described low-pressure gas source is 0.1MPa～50MPa, the gas of described low-pressure gas source It it is the mixed gas of pure gas or several gases that chemical reaction mutually will not occur；Described high-pressure air source and low-pressure gas source Both from any device in gas cylinder, gas tank, air pump, Dewar tank and compressor.

Compared with prior art, the beneficial effects of the utility model are:

1, shunting rewarming: this utility model correct for the high pressure refrigerant gas of throttling frozen type equipment and is simply possible to use in freezing Technology prejudice, by the shunting of high pressure frozen gas and appropriateness pressure limiting so that it is be directly used in rewarming.Our research and test table Bright when being passed through the argon pressure of the cryoprobe throttling operating pressure less than its 20MPa, throttling cooling-down effect weakens rapidly and disappears Losing, now tissue (100-273K) heat exchange with external refrigerating system is realized rewarming by room temperature argon (300K)；And overbottom pressure is the biggest, Gas flow is the biggest, and heat exchange and rewarming effect are the best.

2, residual air rewarming: this utility model make full use of less than freezing operating pressure, cannot be used for freezing residue second highest Calm the anger body as low-pressure gas source for rewarming, improve gas effciency, it is to avoid waste, energy-conserving and environment-protective.During argon helium knife uses Argon less than 21MPa can not use, and entirely can only return gas generation business and bleeds off residual air, again fill to keep 99.999% by bottle High-purity requirement.Meanwhile, residual air still has elevated pressures, it is not necessary to individually gas compression and pushing means, simple in construction.

3, gas preheating: this utility model is also introduced into gas heater preheating rewarming gas so that it is add calentura for controlled Become tissue.By the preheating to low-pressure gas so that it is reach thermotherapy temperature and input cryoprobe, breach the intensification of existing equipment Limit value, improves intensification performance and increases the effect of tumor thermotherapy.

4, throttling pyrogenicity gas is saved: because the throttling frozen type gas costs such as argon are far below rare throttling pyrogenicity type gas Body, such as high-purity helium (differing more than 8 times), uses throttling frozen type gas to realize freezing and rewarming will greatly reduce cost；Also Avoid causing the situation that cannot perform the operation because helium is short or exhausts；And simplify with front preparation and use during step； Access same gas, not only simplify the structure of instrument, the problem that argon helium gas steel cylinder and interface are obscured also will not occur.This reality Utilize this kind of residual air rewarming with novel, reach the effect similar to expensive helium rewarming.

Accompanying drawing explanation

Fig. 1 is the structural representation of this utility model Cryo-surgical apparatus embodiment 1；

Fig. 2 is the structural representation of this utility model Cryo-surgical apparatus embodiment 2；

Fig. 3 is the structural representation of this utility model Cryo-surgical apparatus embodiment 3；

Fig. 4 is the structural representation of this utility model Cryo-surgical apparatus embodiment 4；

Fig. 5 is the structural representation of cryoprobe used in this utility model；

Fig. 6 is the result of the test of embodiment 1 residual air rewarming；

In figure:

1-high-pressure air source 2-the first air gauge 3-the first pressure regulator valve

4-gases at high pressure input pipe 5-high-pressure limiting valve 6-frozen gas house steward

7-cryoprobe freezing electromagnetic valve 8-cryoprobe appendix 9-cryoprobe

9a-cryoprobe air inlet pipe 9b-heat exchange fin 9c-J-T mouth

9d-expansion chamber 9e-cryoprobe outer wall 9f-back cavity

9h-cryoprobe escape pipe 9i-thermometric galvanic couple 10-shunts trachea

11-solenoid diverter valve 12-confluxes trachea 13-low voltage limit pressure valve

14-low-pressure gas source 15-the second air gauge 16-the second pressure regulator valve

17-low-pressure gas input pipe 18-low-voltage solenoid valve 19-gas heater

20-heats gas main's 21-cryoprobe heating electromagnetic valve 22-the first threeway

23-the second threeway 24-the 3rd threeway

Detailed description of the invention

With specific embodiment, technical solutions of the utility model are described in further detail below in conjunction with the accompanying drawings, described This utility model is only explained by specific embodiments, not in order to limit this utility model.All embodiments use Cryoprobe be HealthTronics company of the U.S. manufacture cryoprobe (Φ 1.7mm, Φ 2.4mm, Φ 3.8mm etc.).

Cryoprobe 9 described in the utility model is the gas joint utilizing the Joule-Thomson throttle effect of gas to produce low temperature Stream refrigeration type cryoprobe.The geometry of described cryoprobe 9 application part can be cheese, spherical, elliposoidal, sacculus shape, pin Any one of shape, column, shaft-like and tubulose；Described cryoprobe 9 be cryoprobe, frozen probe rod, cryoprobe, cryoprobe, One in freezing sacculus, freezing electrode, super cold surery device, cryoprobe, cryotip and cryoneedle.

Embodiment 1, as it is shown in figure 1, a kind of air pressure that regulates that the utility model proposes realizes outside the freezing freezing with rewarming Section's device, including high pressure freezing gas circuit, low-pressure heating gas circuit, shunting gas circuit and assembly A.

Described high pressure freezing gas circuit includes gases at high pressure input pipe 4 and the freezing being sequentially connected with high-pressure air source 1 gas outlet Gas main 6, and described gases at high pressure input pipe 4 is provided with the first air gauge 2 and the first pressure regulator valve 3, and described gases at high pressure input Pipe 4 is provided with high-pressure limiting valve 5 with the junction of described frozen gas house steward 6.Described low-pressure heating gas circuit includes and low-pressure gas source The low-pressure gas input pipe 17 that 14 gas outlets are sequentially connected, conflux trachea 12 and heating gas main 20, described low-pressure gas is defeated The end entering extremely described low-pressure gas input pipe 17 on pipe 17, from the gas outlet of described low-pressure gas source 14 is sequentially provided with the second air pressure Table the 15, second pressure regulator valve 16 and low-voltage solenoid valve 18, described in conflux trachea 12 with described heating gas main 20 junction set There is low voltage limit pressure valve 13.

On described gases at high pressure input pipe 4 on pipeline section between described first pressure regulator valve 3 and described high-pressure limiting valve 5 Being provided with the first threeway 22, end and the junction between trachea 12 of confluxing of described low-pressure gas input pipe 17 are provided with the second threeway 23；Being connected between described first threeway 22 with described second threeway 23 and have a shunting trachea 10, described shunting trachea 10 is provided with Solenoid diverter valve 11.

Described assembly A is connected to the end of the described frozen gas house steward 6 in described high pressure freezing gas circuit and described low pressure Between the end of the described heating gas main 20 in heating gas circuit.Described assembly A includes and the end of described frozen gas house steward 6 End and the cryoprobe appendix 8 that is connected of end of described heating gas main 20, described cryoprobe appendix 8 passes through described the Three threeways 24 connect has cryoprobe air inlet pipe 9a, the end of described cryoprobe air inlet pipe 9a to be connected with described cryoprobe 9；Described cold Freeze and be provided with cryoprobe on the pipeline section on device appendix 8 and between described frozen gas house steward's end and described 3rd threeway 24 Freezing electromagnetic valve 7, on described cryoprobe appendix 8 and be positioned at described heating gas main end and described 3rd threeway 24 it Between pipeline section be provided with cryoprobe heating electromagnetic valve 21.

Described cryoprobe 9 in this utility model is the gas utilizing the Joule-Thomson throttle effect of gas to produce low temperature Body throttling refrigeration type cryoprobe.Its a kind of typical structure is as it is shown in figure 5, described cryoprobe 9 includes cryoprobe air inlet pipe 9a, changes Hot fin 9b, J-T mouth 9c, expansion chamber 9d, cryoprobe outer wall 9e, back cavity 9f and cryoprobe escape pipe 9h, described expansion chamber 9d Tip be provided with thermometric galvanic couple 9i, the temperature of described cryoprobe is measured in real time by described thermometric galvanic couple 9i.

The regulation air pressure using above-described embodiment 1 realizes the freezing and Cryo-surgical apparatus of rewarming, it is possible to achieve without in advance The cryoprobe throttling freezing of hot gas and rewarming process.

The process realizing throttling freezing is that high pressure gas at normal temperature is provided by high-pressure air source 1, and its pressure is by the first air gauge 2 Regulating and controlling with the first pressure regulator valve 3, through gases at high pressure input pipe 4, access high-pressure limiting valve 5, gases at high pressure work to freezing through pressure limiting After pressure, accessing frozen gas house steward 6, when starting cryoprobe freezing electromagnetic valve 7, frozen gas accesses cryoprobe appendix 8 again Access cryoprobe air inlet pipe 9a；As it is shown in figure 5, the frozen gas of input throttles at cryoprobe air inlet pipe 9a end J-T mouth 9c It is expanded to expansion chamber 9d, by adjacent cryoprobe outer wall 9e and surrounding tissue heat exchange, absorption refrigeration；Back cavity 9f backflow Cryogenic gas air inlet generation heat exchange in heat exchange fin 9b with cryoprobe air inlet pipe 9a, cooling air inlet is to improve throttle effect After, chilled device escape pipe 9h flows out and discharges to air, and the temperature of cryoprobe is by the thermometric being placed in cryoprobe front inner wall Galvanic couple 9i measures in real time.

Rewarming process includes shunting rewarming and residual air rewarming.As it is shown in figure 1, shunting rewarming refers to that utilization is connected to high pressure gas On body input pipe 4 at first threeway 22 shunting trachea 10 gases at high pressure, rewarming after pressure limiting.Residual air rewarming refers to utilize low pressure The high pressure residual air without freezing usefulness that source of the gas 14 provides (< 20MPa) rewarming.In the prior art, it is common that must by shunt gas Must be down to very low-pressure (such as 500psi or below 3.45MPa) and heated after could be used for rewarming, it addition, be typically to think high Body (referring to the gas higher than common 15MPa pressure) of calming the anger cannot be used for rewarming.And the device that uses this utility model to provide is permissible Realize utilizing shunting gases at high pressure or utilizing the direct rewarming of high pressure residual air without freezing usefulness, overcome in prior art because causing Being considered during cold mould gases at high pressure can only the technology prejudice of refrigeration.

Shunting rewarming process: rewarming gas comes from high-pressure air source 1, and its pressure is by the first air gauge 2 and the first pressure regulator valve 3 After regulation and control, branch to shunt trachea 10 after gases at high pressure input pipe 4, and controlled by solenoid diverter valve 11, the gas stream of shunting The trachea 12 that confluxes is entered after at the second threeway 23；Again through low voltage limit pressure valve 13 pressure limiting to rewarming aero operating pressure.This gas Heated gas main 20, cryoprobe heating electromagnetic valve 21 and cryoprobe appendix 8, access cryoprobe air inlet pipe 9a, such as Fig. 5 institute Show, pyrogenicity gas chilled device air inlet pipe 9a of input, expansion chamber 9d through adjacent cryoprobe outer wall 9e and around freezing group Knit heat exchange and pyrogenicity；The gas of backflow discharges to air through back cavity 9f and cryoprobe escape pipe 9h.

Residual air rewarming process: rewarming gas comes from low-pressure gas source 14, its pressure is by the second air gauge 15 He on pipeline Second pressure regulator valve 16 regulates and controls, and the gas after regulation and control controls through low-pressure gas input pipe 17 and low-voltage solenoid valve 18, in the second threeway Accessing the trachea 12 that confluxes at 23, subsequent process is identical with corresponding partial routine in aforesaid shunting rewarming.

Embodiment 2, although, the most it is not provided with gas heater 19 but it also may realize throttling freezing and multiple Temperature, but the temperature of its rewarming will not be the highest, substantially at 0 DEG C or more slightly higher, such as 10-20 DEG C；In order to reach preferable Rewarming effect, so realize tumor thermotherapy function (reaching more than 40 DEG C), therefore, on the architecture basics of above-described embodiment 1, as Pipe shown in Fig. 2, in described low-pressure heating gas circuit, between described low voltage limit pressure valve 13 and cryoprobe heating electromagnetic valve 21 Section is provided with gas heater 19.Use embodiment 2 to be provided with the technical scheme of gas heater 19, not only can rewarming, Er Qieke Realize heating rewarming to 40-60 DEG C.Embodiment 2 realizes heating rewarming process and only exists from the different of rewarming process in embodiment 1 In: through low voltage limit pressure valve 13 pressure limiting to rewarming aero operating pressure, this gas first pass through gas heater 19 heating after the most successively Heated gas main 20, cryoprobe heating electromagnetic valve 21 and cryoprobe appendix 8, enter eventually through cryoprobe air inlet pipe 9a Cryoprobe.

Embodiment 3, as it is shown on figure 3, on the architecture basics of above-described embodiment 1, the end of described frozen gas house steward 6 and It is parallel with multiple assembly A, it is possible to achieve multiple cryoprobes work simultaneously between the end of described heating gas main 20, it is possible to The independent mode of operation controlling each cryoprobe, it is achieved freezing and rewarming function.

Embodiment 4, as shown in Figure 4, on the architecture basics of above-described embodiment 2, the end of described frozen gas house steward 6 and It is parallel with multiple assembly A, it is possible to achieve multiple cryoprobes work simultaneously between the end of described heating gas main 20, it is possible to The independent mode of operation controlling each cryoprobe, it is achieved freezing, rewarming and heating function.

Verification experimental verification:

Technical scheme for above-described embodiment 1 (being not required to gas preheating) has carried out low-pressure gas rewarming verification experimental verification: first First the 2.4mm diameter cryoprobe that HealthTronics company of the U.S. manufactures is connected to the working end of this device, by this cryoprobe Front end frozen portions is totally submerged in 36～37 DEG C of thermostatted waters of body temperature, room temperature 21 DEG C；Temperature probe is respectively placed in water Cryoprobe probe distal end is fixed in neutralization.High-pressure air source 1 uses 25Mpa (3500psi) argon higher than argon refrigeration operating pressure Gas also arranges high-pressure limiting valve 5 for argon throttling refrigeration operating pressure 20Mpa (2800psi)；Low-pressure gas source 14 is used below argon The 17.5Mpa (2500psi) of gas refrigeration operating pressure remains argon and arranges low voltage limit pressure valve 13 for 12.5Mpa (1800psi). First using " frozen mode ", open the first pressure regulator valve 3 and cryoprobe freezing electromagnetic valve 7, cryoprobe is refrigerated to by high pressure argon gas- About 100 DEG C and form normal ice hockey and close cryoprobe freezing electromagnetic valve 7 after 5 minutes and stop freezing." low pressure is multiple in startup immediately Temperature " mode of operation, open low-voltage solenoid valve 18 and cryoprobe heating electromagnetic valve 21, pressure limiting to 12.5Mpa (1800psi) pressure Low-pressure argon will input cryoprobe 9, by cryoprobe 9 rewarming to more than 0 DEG C in 200 seconds.Result of the test is as shown in Figure 6.This reality Checking understands the rewarming effect of low pressure residual air.

Although being described this utility model above in conjunction with figure, but this utility model is not limited to above-mentioned tool Body embodiment, above-mentioned detailed description of the invention is only schematic rather than restrictive, the ordinary skill people of this area Member is under enlightenment of the present utility model, in the case of without departing from this utility model objective, it is also possible to make many variations, these Within belonging to protection of the present utility model.

Claims (7)

1. regulate air pressure and realize a freezing and Cryo-surgical apparatus for rewarming, including high pressure freezing gas circuit, low-pressure heating gas circuit, Shunting gas circuit and assembly A, it is characterised in that:

Described high pressure freezing gas circuit includes gases at high pressure input pipe (4) and the freezing being sequentially connected with high-pressure air source (1) gas outlet Gas main (6), described gases at high pressure input pipe (4) is provided with the first air gauge (2) and the first pressure regulator valve (3), described high pressure Gas inlet pipe (4) is provided with high-pressure limiting valve (5) with the junction of described frozen gas house steward (6)；

Described low-pressure heating gas circuit includes the low-pressure gas input pipe (17) being sequentially connected with low-pressure gas source (14) gas outlet, confluxes Trachea (12) and heating gas main (20), described low-pressure gas input pipe (17) is upper, giving vent to anger from described low-pressure gas source (14) Mouth is sequentially provided with the second air gauge (15), the second pressure regulator valve (16) and low tension to the end of described low-pressure gas input pipe (17) Magnet valve (18), described in conflux trachea (12) with described heating gas main (20) junction be provided with low voltage limit pressure valve (13)；

It is positioned at the pipeline section between described first pressure regulator valve (3) and described high-pressure limiting valve (5) on described gases at high pressure input pipe (4) Being provided with the first threeway (22), between end and the trachea that confluxes (12) of described low-pressure gas input pipe (17), junction is provided with Two threeways (23)；It is connected between described first threeway (22) with described second threeway (23) and has a shunting trachea (10), described point Flow tube (10) is provided with solenoid diverter valve (11)；

End and the described low pressure of the described frozen gas house steward (6) that described assembly A is connected in described high pressure freezing gas circuit add Between the end of described heating gas main (20) in steam road；

Described assembly A includes being connected with the end of described frozen gas house steward (6) and the end of described heating gas main (20) Cryoprobe appendix (8), described cryoprobe appendix (8) by one the 3rd threeway (24) connect have cryoprobe air inlet pipe (9a), the end of described cryoprobe air inlet pipe (9a) connects cryoprobe (9)；Described cryoprobe appendix (8) is upper and is positioned at institute The pipeline section stated between frozen gas house steward (6) end and described 3rd threeway (24) is provided with cryoprobe freezing electromagnetic valve (7), institute State cryoprobe appendix (8) and above and be positioned at the pipe between described end and described 3rd threeway (24) heating gas main (20) Section is provided with cryoprobe heating electromagnetic valve (21).

The most according to claim 1, regulation air pressure realizes the freezing and Cryo-surgical apparatus of rewarming, it is characterised in that described low The pipeline section press in heating gas circuit, being positioned between described low voltage limit pressure valve (13) and the end heating gas main (20) is provided with gas Body heater (19).

Regulation air pressure the most according to claim 1 or claim 2 realizes the freezing and Cryo-surgical apparatus of rewarming, it is characterised in that institute State and between the end of frozen gas house steward (6) and the end of described heating gas main (20), be parallel with multiple assembly A.

The most according to claim 3, regulation air pressure realizes the freezing and Cryo-surgical apparatus of rewarming, it is characterised in that described cold Freezing device (9) is the gas throttling refrigeration type cryoprobe utilizing the Joule-Thomson throttle effect of gas to produce low temperature.

The most according to claim 3, regulation air pressure realizes the freezing and Cryo-surgical apparatus of rewarming, it is characterised in that described height Gas in pressurized air source (1) is throttling refrigeration type gas；The pressure of described high-pressure air source (1) is 0.1MPa～100MPa.

The most according to claim 3, regulation air pressure realizes the freezing and Cryo-surgical apparatus of rewarming, it is characterised in that described low The pressure of pressurized air source (14) is 0.1MPa～50MPa, and the gas of described low-pressure gas source (14) is pure gas or mutually will not There is the mixed gas of several gases of chemical reaction.

The most according to claim 3, regulation air pressure realizes the freezing and Cryo-surgical apparatus of rewarming, it is characterised in that described height Pressurized air source (1) and low-pressure gas source (14) are both from any device in gas cylinder, gas tank, air pump, Dewar tank and compressor.