CN86204418U - Liquefied nitrogen cryotherapy instrument with optical fiber endoscope - Google Patents
Liquefied nitrogen cryotherapy instrument with optical fiber endoscope Download PDFInfo
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- CN86204418U CN86204418U CN 86204418 CN86204418U CN86204418U CN 86204418 U CN86204418 U CN 86204418U CN 86204418 CN86204418 CN 86204418 CN 86204418 U CN86204418 U CN 86204418U CN 86204418 U CN86204418 U CN 86204418U
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- liquid nitrogen
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- negative pressure
- heater
- optical fiber
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Abstract
The utility model relates to liquefied nitrogen cryotherapy instrument with optical fiber endoscope which is suitable for the diagnosis and treatment of the inner cavity focal, such as esophagus, stomach, rectum, etc. of human bodies. The liquefied nitrogen cryotherapy instrument with optical fiber endoscope is formed by that an optical fiber endoscope is additionally provided with a liquid nitrogen transmission device, a freezing head and a heating device and is externally connected with a negative-pressure gasification device, a dewar flask, etc. The utility model which can diagnose as well as treat is multifunctional inner cavity surgical operating instrument; the treatment using the instrument can largely alleviate the pain of the patient, and lots of operation fees can be saved every time.
Description
This utility model belongs to Medical Instruments, is used for the human body esophagus, the diagnosis and the treatment of focuses such as harmonization of the stomach rectum.
In modern medicine, because developing rapidly of cryogenic technique and using widely day by day in medical treatment, progressively form a brand-new subdiscipline---cryosurgery or title cryosurgery, it is at department of dermatologry, gynecological, ophthalmology, department of otorhinolaryngology, oncology, medical domains such as urology department and anus section become effective treatment means.Advantages such as it is easy that cryotherapy has operation, and safety need not anesthesia rapidly, does not bleed and does not also infect, and cicatrix is little, and surgery cost is low, and no matter men and women, old and young can accept cold therapy a little less than the rigidity of the body.Since the neurosurgery professor Ku Peier and first liquid nitrogen cryogenics therapy apparatus of Linde Co's cooperation research and development success of the U.S. in 1961, countries in the world are developed multiple hypothermia therapy unit in succession, and have delivered the research report of many clinical cold therapies and the development report of relevant Cryogenic instrument for surgical purpose.Retrieving and consulting relevant documents and materials is to know, external Cryogenic instrument for surgical purpose generally all adopts the double-layer coaxial corrugated stainless steel tubing of traditional high-vacuum insulation as the liquid nitrogen transfer tube, this transfer tube is heaviness but also dumb not only, can only be applicable to the cold therapy of the shallow table focus of human body.Domestic existing therapy apparatus adopts the transmission of malleation two-phase, and this method impels liquid nitrogen to accelerate gasification rate normally by heating, forms to be higher than atmospheric pressure in Dewar flask, and liquid nitrogen is pressed into transfer tube.Because liquid nitrogen is in freezing head gasification, volumetric expansion causes local pressure to raise, reduced with Dewar flask in pressure differential, transmission temporarily weakened even interrupt, this method can't be transmitted liquid nitrogen continuously equably.
The purpose of this utility model is to propose negative pressure liquid nitrogen two-phase transmission technology, and art designs goes out with fibre opic endoscope to be coupled in view of the above, can check and multifunctional human inner chamber focus medical apparatus and instruments ┈ fibre opic endoscope liquid nitrogen freezing therapy instrument that can cold therapy.
This instrument is by Dewar flask, the negative pressure gasification installation, the negative pressure transmitting device, freezing head, heater and fibre opic endoscope are formed, wherein the negative pressure gasification installation is a critical component of realizing negative pressure liquid nitrogen two-phase transmission technology, and its structure and parameter are directly connected to the formation characteristic of liquid nitrogen transmission performance and adiabatic nitrogen film.If the gasification installation radiating surface is too big, heat radiation is excessive, and more liquid nitrogen was gasified before arriving freezing head, and freezing head does not reach required low temperature.On the contrary, if gasification installation heat radiation is not enough, adiabatci condition that can not fine formation nitrogen film will be lost a large amount of colds in transmission course, not only make the transfer tube sclerosis, be difficult to operation, and make freezing inaccessible required low temperature.
The negative pressure transmitting device comprises air exhauster, exhaust tube and liquid nitrogen transfer tube.Air exhauster forms negative pressure after starting in transmission system, constitute and atmospheric negative pressure differential, and the liquid nitrogen in the Dewar flask is forced out by the atmospheric pressure effect, is transported to freezing head by transfer tube after the negative pressure gasification installation forms the two-phase transmission state.
The novel cryogenic temperature of this usefulness is in 100 ℃～196 ℃ requirements that meet the inner chamber cold therapy of 3～5 minutes Nei Keda.Compare with Cryogenic instrument for surgical purpose both domestic and external, because employing negative pressure liquid nitrogen two-phase transmission technology combines with fibre opic endoscope, not only possessed the ability that human intracavity's focus is undergone surgery, and liquid nitrogen is transmitted in assurance continuously equably, shortened the time of each cold therapy, improved therapeutic effect, can save at every turn and operate on Operation Fee more than 300 yuan.This instrument cost is lower, has higher utility and economic benefit.
Fig. 1 is the profile of liquid nitrogen cryotherapy machine that adopts the double-layer coaxial corrugated tube form of high-vacuum insulation abroad.By Dewar flask (1), corrugated stainless steel tubing (2), steam vent (3), handle (4), freezing head (5) is formed.
Fig. 2 is a profile of the present utility model.
Fig. 3 is the profile of negative pressure gasification installation.
Fig. 4 is the expanded view of heater in this utility model.Wherein (11) are the heater power supplys, and (13) are heater strips.
Fig. 5 is the liquid nitrogen freezing therapy instrument profile that utilizes another kind of size optical fiber endoscope to make.
Embodiment 1: this utility model is by Dewar flask (1), negative pressure gasification installation (6), liquid nitrogen transfer tube (7), freezing head (5), exhaust tube (8), air exhauster (9), heater (10), heater power supply (11) and fibre opic endoscope (12) are formed.
Transfer tube (7) and exhaust tube (8) are nested together and wind heater strip (13), getting in the verify of insertion fibre opic endoscope (12), freezing head (5) is installed in the end of transfer tube (7) and exhaust tube (8), the head end of transfer tube (7) connects the insertion of negative pressure gasification installation (6) back and is equipped with in the Dewar flask (1) of liquid nitrogen, the head end of exhaust tube (8) is connected with air exhauster (9), form complete negative pressure liquid nitrogen two-phase transmission system, realize the Clinics and Practices dual-use function.Described air exhauster is used the aerating/exhausting apparatus that ordinary optic fibre endoscope has, and has saved expense, has reduced cost.
After starting air exhauster (9), form negative pressure in the transmission system, constitute and atmospheric negative pressure differential, liquid nitrogen in the Dewar flask (1) is forced out by the atmospheric pressure effect, after negative pressure gasification installation (6) forms the two-phase transmission state, flow to freezing head (5) continuously by transfer tube (7), freezing head (5) temperature is sharply descended, the focus that contacts with freezing head (5) reaches the required low temperature of treatment very soon also by sharply freezing.Negative pressure gasification installation shown in Figure 3, D--gasification installation external diameter wherein, d--liquid nitrogen transfer tube internal diameter, L--gasification installation length, b--fin thickness, its parameter is according to following empirical equation calculation Design:
D＝md L＝nD b＝L／k
M, n, k is an empirical coefficient, gets m=4～8, n=3～6, k=30～60, D, d, L, the unit of b is a millimeter.
In order to guarantee that fibre opic endoscope (12) is not lowered the temperature, thereby avoid damaging its parts or influence its performance, must carry out heat temperature raising to the cold nitrogen of locating to gasify at freezing head (5), since fibre opic endoscope (12) to get verify less, enough heats should be reliably transmitted in the coiling of heater strip (13), can not cross one another again, cause short circuit.The winding method of the heater strip of heater shown in Figure 4 (13) can reach above-mentioned required requirement, wherein heater strip (13) whenever around big half-turn just oppositely again around, join with lead-out wire and heater power supply (11) then.Heater (10) also can be by the figure of design with the method for high vacuum evaporation plated film at exhaust tube (8) outer surface evaporation last layer resistive film, be connected with heater power supply (11), play identical heat effect.Nitrogen after the intensification is discharged in the atmosphere by air exhauster (9) and goes, and when reaching cold therapy temperature and required time, closes air exhauster, and instrument promptly quits work.
Embodiment 2: as shown in Figure 5, design at the fibre opic endoscope of another kind of specification, utilize filling steam vent and getting a kind of structure chart of verify of fibre opic endoscope simultaneously.The exhaust tube (8) and the liquid nitrogen transfer tube (7) that will wind heater strip (13) insert filling steam vent and getting in the verify of fibre opic endoscope (12) respectively, as long as freezing head (5) is done as shown in Figure 5 change slightly, can realize the operate as normal and the repertoire of system.
Claims (5)
1, a kind of Medical Instruments of being diagnosed and being treated by fibre opic endoscope (12) and liquid nitrogen cryotherapy instrument being used to of forming is characterized in that this instrument employing negative pressure liquid nitrogen transmitting device and negative pressure gasification installation and heater (10).
2, instrument according to claim 1 is characterized in that negative pressure liquid nitrogen transmitting device by air exhauster (9), exhaust tube (8), and liquid nitrogen transfer tube (7) is formed.
3, instrument according to claim 1 and 2, the negative pressure gasification installation (6) that it is characterized in that being used to form the transmission of negative pressure liquid nitrogen two-phase are by following empirical equation calculation Design:
D＝md L＝nD b＝L／k
Wherein D is the gasification installation external diameter, and d is a liquid nitrogen transfer tube internal diameter, and L is a gasification installation length, and b is a fin thickness, and coefficient is got m=4-8, n=3-6, k=30-60.
4,, it is characterized in that heater is that lead-out wire around the heater strip of exhaust tube (8) outer surface does not intersect with coiling and contacts according to the described instrument of claim 3.
5,, it is characterized in that heater is to be made of the resistive film of high vacuum vapor deposition at exhaust tube (8) outer surface according to the described instrument of claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86204418 CN86204418U (en) | 1986-06-25 | 1986-06-25 | Liquefied nitrogen cryotherapy instrument with optical fiber endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86204418 CN86204418U (en) | 1986-06-25 | 1986-06-25 | Liquefied nitrogen cryotherapy instrument with optical fiber endoscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86204418U true CN86204418U (en) | 1987-12-09 |
Family
ID=4807491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86204418 Withdrawn CN86204418U (en) | 1986-06-25 | 1986-06-25 | Liquefied nitrogen cryotherapy instrument with optical fiber endoscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86204418U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101396299B (en) * | 2008-11-12 | 2010-11-10 | 郁如煌 | Dewar integrated low-temperature operation device coupled with celioscope |
| CN101606862B (en) * | 2009-07-14 | 2011-04-06 | 郁如煌 | Simple low-temperature operation device for treating in-vivo tumour under aid of ultrasonic or celioscope |
| CN109745117A (en) * | 2019-01-10 | 2019-05-14 | 四川捷祥医疗器械有限公司 | A kind of Temperature-controlled appliance and method |
| CN110353794A (en) * | 2019-07-31 | 2019-10-22 | 中国人民解放军陆军特色医学中心 | A kind of liquid nitrogen sprinkler with endoscope |
-
1986
- 1986-06-25 CN CN 86204418 patent/CN86204418U/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101396299B (en) * | 2008-11-12 | 2010-11-10 | 郁如煌 | Dewar integrated low-temperature operation device coupled with celioscope |
| CN101606862B (en) * | 2009-07-14 | 2011-04-06 | 郁如煌 | Simple low-temperature operation device for treating in-vivo tumour under aid of ultrasonic or celioscope |
| CN109745117A (en) * | 2019-01-10 | 2019-05-14 | 四川捷祥医疗器械有限公司 | A kind of Temperature-controlled appliance and method |
| CN110353794A (en) * | 2019-07-31 | 2019-10-22 | 中国人民解放军陆军特色医学中心 | A kind of liquid nitrogen sprinkler with endoscope |
| CN110353794B (en) * | 2019-07-31 | 2021-07-27 | 中国人民解放军陆军特色医学中心 | Liquid nitrogen sprayer with endoscope |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |