Cryogen flow control
US12426934B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2022 |
| Grant date | Sep 30, 2025 |
| Priority date | — |
| Expiry date | Dec 24, 2043 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/064
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Apparatus, including a probe, containing a first lumen and a second lumen and having a distal end that contacts tissue of a living subject. A fluid supply delivers a cryogenic fluid through the first lumen to the distal end and receives cryogenic fluid returning via the second lumen. A temperature sensor is located at the distal end. A pressure sensor located at a proximal end of the first lumen measures a pressure of the cryogenic fluid. A processor controls a delivery rate of the cryogenic fluid from the fluid supply, so that, when a temperature measured by the temperature sensor is less than a preset guard temperature, the delivery state is a preset low rate, and when the temperature measured by the temperature sensor is greater than or equal to the preset guard temperature, the delivery rate is set in response to a pressure measured by the pressure sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.