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US 8,939,968 B2Granted
Cryosurgical instrument
AssigneeErbe Elektromedizin GmbH
InventorFranz Geiselhart
Life of this patent
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Abstract
A cryosurgical instrument, comprising a cryoprobe having ducting through which a compressed cooling fluid, such as a cooling gas, flows, for cooling a least part of the cryoprobe. The ducting has an expansion channel having a channel cross-section that enlarges progressively in the flow, direction over a predetermined length such that the compressed cooling gas gradually decompresses, at least partially, beyond a predetermined length on its flow path through the expansion channel while simultaneously cooling down.
Claims18
A cryosurgical instrument, comprising:
- a cryoprobe, having a housing and ducting through which a compressed cooling fluid flows for cooling at least part of the cryoprobe,
- wherein the ducting has an expansion channel having a channel cross-section that enlarges progressively in the flow direction over a predetermined length such that the compressed cooling fluid gradually decompresses, at least partially, beyond a predetermined length on its flow path through the expansion channel while simultaneously cooling down,
- wherein the expansion channel is formed between an outer tube and an inner tube running within the outer tube, and
- wherein the outer tube is part of the housing of the cyroprobe or thermally connected thereto.
1 more element
A cryoprobe comprising:
- a housing and ducting through which a compressed cooling gas flows for cooling at least part of the cryoprobe, wherein the ducting has an expansion channel having a channel cross-section that enlarges progressively in the flow direction over a predetermined length such that the compressed cooling gas gradually decompresses, at least partially, beyond a predetermined length on its flow path through the expansion channel while simultaneously cooling down, wherein the expansion channel is formed between an outer tube and an inner tube running within the outer tube, and wherein the outer tube is part of the housing or thermally connected thereto.
Dependencies are inferred from the claim text.