Decompression bubble detectors
US4290432A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 10, 1979 |
| Grant date | Sep 22, 1981 |
| Priority date | — |
| Expiry date | Oct 10, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/106
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A decompression bubble detector comprises a pulsed ultra-sound transmitter/receiver which is scanned across a cross-section of tissue and the total number of pulse echoes received in a preselected time interval is recorded. Changes in the total number of pulse echoes recorded in successive time intervals are used to monitor the decompression. A single transducer is scanned by means of a driven eccentric cam and a cam follower. A sin/cos potentiometer generates a signal related to the angular position of the transducer connected to a delay so that pulse counting can be arranged to coincide with the passage of the transducer across the target.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.