[특허]Precooled cryogenic ablation system

[미국특허] Precooled cryogenic ablation system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25D-003/00 F25B-009/00 F25B-007/00
출원번호	US-0344423 (1999-06-25)
발명자 / 주소	Li Hong
출원인 / 주소	CryoGen, Inc.
대리인 / 주소	Spinks
인용정보	피인용 횟수 : 82 인용 특허 : 15

초록 ▼

A method and apparatus for using a secondary refrigerant to precool and liquefy a primary refrigerant, then vaporizing and expanding the primary refrigerant to cool a cold tip of a cryosurgical instrument for ablation of biological tissue, such as cardiovascular tissue, in particular endocardiac tissue and tissue inside a cardiac blood vessel. The secondary refrigerant has a critical temperature above the critical temperature of the primary refrigerant, and a cooling temperature below the critical temperature of the primary refrigerant, thereby facilitating the use of the precooling step to provide liquid primary refrigerant in an operating room environment in which the primary refrigerant could not otherwise be provided in the liquid phase.

대표청구항 ▼

[ I claim:] [1.]1. A cryosurgical instrument for ablation of endocardiac tissue, comprising:a source of a gaseous primary refrigerant said source providing said primary refrigerant at a temperature above the critical temperature of said primary refrigerant;a source of a liquid secondary refrigerant, said secondary refrigerant having a critical temperature higher than said critical temperature of said primary refrigerant;a secondary expansion element connected to receive said liquid secondary refrigerant, said secondary expansion element being constructed to vaporize and expand said secondary refrigerant to a temperature below said critical temperature of said primary refrigerant;a primary-to-secondary heat exchanger having a primary refrigerant flow path connected to receive said gaseous primary refrigerant, and a secondary refrigerant flow path connected to receive said vaporized and expanded secondary refrigerant from said secondary expansion element, said heat exchanger being constructed to cool and liquefy said primary refrigerant;a primary expansion element connected to receive said liquid primary refrigerant from said heat exchanger, said primary expansion element being constructed to vaporize and expand said primary refrigerant to a selected cryogenic temperature; anda cryoablation heat transfer element connected to receive said vaporized and expanded primary refrigerant;wherein said primary refrigerant comprises SUVA-95, and said secondary refrigerant comprises AZ-20.

이 특허에 인용된 특허 (15) 인용/피인용 타임라인 분석

Boiarski Michael (Moscow RUX) Longsworth Ralph C. (Allentown PA) Yudin Boris (Moscow RUX) Hill Dennis H. (Pottstown PA) Klusmier Lawrence A. (Germansville PA) Khatri Ajay N. (Bethlehem PA) Owoc Antho, Closed cycle cryogenic refrigeration system with automatic variable flow area throttling device.
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Wijkamp Arnoldus Cornelius Johannes Maria,NLX, Cryo-ablation catheter.
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Hersey Devin W. (Kent WA), Cryogenic cooling system with precooling stage.
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Hersey Devin W. (Kent WA), Cryogenic cooling system with precooling stage.
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Sakitani Katsumi (Sakai JPX) Kang Yoon M. (Sakai JPX) Shinozaki Shinichiro (Sakai JPX) Taneya Shoichi (Sakai JPX) Miura Kazuo (Sakai JPX) Ogura Tadashi (Sakai JPX) Noguchi Satoshi (Sakai JPX), Cryogenic refrigerator.
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Sakitani Katsumi (c/o Kanaoka Factory ; Sakai Plant ; Daikin Industries ; Ltd. ; 1304 Kanaoka-cho Sakai-shi ; Osaka 591 JPX) Kang Yoon M. (c/o Kanaoka Factory ; Sakai Plant ; Daikin Industries ; Ltd., Cryogenic refrigerator.
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Dobak ; III John D. (6273 Caminito Del Oeste San Diego CA 92111), Cryosurgical instrument.
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Varney Kelvin John,GBX ; Reeves Simon Richard,GBX, Cryosurgical probe with pre-cooling feature.
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Hamilton Archie C. (3422 Rolling Hills Dr. Eagan MN 55121), Electronic cryogenic surgical probe apparatus and method.
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Jones Jack A. (Los Angeles CA) Petrick S. Walter (La Canada CA) Bard Steven (Northridge CA), Multicomponent gas sorption Joule-Thomson refrigeration.
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Dobak ; III John D. ; Brown Terry L. ; Ghaerzadeh Kambiz ; Yu Xiaoyu, Precooling system for joule-thomson probe.
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Little William A. ; Sapozhnikov Igor, Self-cleaning cryogenic refrigeration system.
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Little William A. (Palo Alto CA), Self-cleaning low-temperature refrigeration system.
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Bard Steven (Northridge CA) Jones Jack A. (Los Angeles CA), Three-stage sorption type cryogenic refrigeration systems and methods employing heat regeneration.
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Jones Jack A. (Los Angeles CA) Wen Liang-Chi (La Canada CA) Bard Steven (Northridge CA), Two-statge sorption type cryogenic refrigerator including heat regeneration system.
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[미국특허] Precooled cryogenic ablation system 원문보기

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