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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0828732 (1992-01-31) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 305 인용 특허 : 0 |
An improved cryosurgical system includes means for cooling the cryoprobe instrument to temperatures below the normal boiling point of liquid nitrogen as well as means for recovering the sub-cooled liquid coolant. A unique cryoprobe instrument of simplified construction uses an active vacuum for ther
An improved cryosurgical system includes means for cooling the cryoprobe instrument to temperatures below the normal boiling point of liquid nitrogen as well as means for recovering the sub-cooled liquid coolant. A unique cryoprobe instrument of simplified construction uses an active vacuum for thermal insulation. Means are provided for controllably adjusting the length of the freezing zone of the cryoprobe to allow the freezing zone to be adjusted for different sizes and shapes of tumors which may be “observed”before surgery by ultrasound imaging. Multiple, disposable cryoprobe instruments can be individually controlled for both operating temperature and freeze zone length. A preferred refrigeration system for sub-cooling liquid nitrogen refrigerant or other cryogenic liquid refrigerant is based on the principles of evaporative cooling.
A cryosurgical system for destroying tumors by freezing, comprising at least one source of cryogenic liquid refrigerant, means for sub-cooling the cryogenic liquid refrigerant, a multiplicity of cryoprobe instruments, supply conduit means connecting the at least one source to each of the multiplicit
A cryosurgical system for destroying tumors by freezing, comprising at least one source of cryogenic liquid refrigerant, means for sub-cooling the cryogenic liquid refrigerant, a multiplicity of cryoprobe instruments, supply conduit means connecting the at least one source to each of the multiplicity of instruments, flow control means for directing flow of liquid refrigerant from the at least one source via the supply conduit means to only preselected ones of the multiplicity of instruments to cryogenically activate the preselected ones, temperature control means for controlling the temperature of each cryogenically activated cryoprobe instrument independently of the temperature of any other cryogenically activated cryoprobe instrument, and display means for displaying which of the preselected ones of the multiplicity of instruments is receiving liquid refrigerant, and for displaying the temperature of each preselected one, whereby only one or a multiplicity of the cryoprobe instruments may be activated to simultaneously freeze different portions of a tumor to facilitate total destruction thereof and/or simultaneously freeze at least one portion each of two or more tumors in the same patient.
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