发明名称 |
METHOD AND APPARATUS FOR SUPPLYING REFRIGERANT FLUID |
摘要 |
An apparatus is disclosed for supplying a refrigerant fluid to a cooling device, such as a cryosurgical probe. An arrangement of valves may control the supply of fluid to and from the cooling device. Fluid may flow in a forward direction through the cooling device for generating cooling by expansion of the fluid in the cooling device. The apparatus may execute a programmed sequence of cooling and heating cycles automatically. Backflushing of the fluid may be used for clearing contaminants from the inlet side of the cooling device. A pulse width modulated control signal may be used to control one of the valves to have a variable effective aperture. A flow rate sensor may detect the flow rate through the cooling device. The detected flow rate may be used to detect an occurrence of a blockage and/or for controlling the fluid supplied to the cooling device. A blockage may be cleared by automatic backflushing. |
申请公布号 |
WO2005038357(A2) |
申请公布日期 |
2005.04.28 |
申请号 |
WO2004IB03401 |
申请日期 |
2004.10.18 |
申请人 |
CRYOMED GROUP LIMITED;COPPING, GARETH;HOLMES, MILES |
发明人 |
COPPING, GARETH |
分类号 |
A61B18/02;F25B9/02 |
主分类号 |
A61B18/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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