[특허]Cryotherapy probe

Cryotherapy probe 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61B-018/18 A61B-018/02
출원번호	US-0087947 (2013-11-22)
등록번호	US-9408656 (2016-08-09)
발명자 / 주소	Littrup, Peter J. Babkin, Alexei V. Duncan, Robert V. Kerkar, Pramod Boldarev, Sergey T.
출원인 / 주소	ADAGIO MEDICAL, INC.
대리인 / 주소	Ginsberg, Lawrence N.
인용정보	피인용 횟수 : 0 인용 특허 : 104

초록 ▼

A method of cooling a material including the steps of (i) providing a cryotherapy instrument, (ii) positioning a portion of the cryotherapy instrument adjacent the material to be cooled, and (iii) circulating a cryogenic fluid through the cryotherapy instrument under physical conditions near a critical point of a liquid-vapor system for the cryogenic fluid. The critical point defines a point in a phase diagram of the liquid-vapor system where molar volumes are substantially equivalent for liquid and gas, whereby vapor lock associated with cooling of the cryotherapy instrument is avoided.

대표청구항 ▼

1. A method of cooling a material comprising the steps of: providing a cryotherapy instrument;positioning a portion of the cryotherapy instrument adjacent the material to be cooled;circulating a cryogenic fluid through the cryotherapy instrument under physical conditions near a critical point of a liquid-vapor system for the cryogenic fluid, wherein the critical point defines a point in a phase diagram of the liquid-vapor system where molar volumes are substantially equivalent for liquid and gas, whereby vapor lock associated with cooling of the cryotherapy instrument is avoided. 2. The method of claim 1, wherein the step of circulating the cryogenic fluid comprises circulating the cryogenic fluid for an initial period of time. 3. The method of claim 2, further comprising the step of maintaining the pressure of the cryogenic fluid during the initial period at a near critical pressure of the cryogenic fluid. 4. The method of claim 3, wherein the step of circulating the cryogenic fluid comprises circulating cryogenic fluid for a freeze period subsequent to the initial period. 5. The method of claim 4, wherein the pressure of the cryogenic fluid during the freeze period is less than the pressure of the cryogenic fluid during the initial period. 6. The method of claim 1, wherein the cryotherapy instrument comprises a shaft having a distal section with a closed distal end and an active freeze region in the distal section. 7. The method of claim 6, wherein the material to be cooled is human tissue. 8. The method of claim 7, wherein the shaft comprises a metal material adapted for percutaneous insertion into the human tissue. 9. The method of claim 6, wherein a length of the active freeze region is approximately 1 cm. 10. The method of claim 7, wherein the human tissue is a tumor. 11. The method of claim 1, wherein the circulating step comprises circulating liquid nitrogen at a pressure of about 33.5 atm. 12. The method of claim 1, wherein the circulating step comprises circulating the cryogenic fluid through an inlet tube, an outlet tube, and a hollow cavity of the cryotherapy instrument.

이 특허에 인용된 특허 (104)

Barken Israel (6823 Deer Hollow Pl. San Diego CA 92120), Apparatus and method for computer controlled cryosurgery.
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Cryotherapy probe 원문보기

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Cryotherapy probe 원문보기

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