Device for assessing perfusion failure in a patient by measurement of blood flow
US7618376B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 26, 2007 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | Apr 8, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0295
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device is provided for assessing impairment of blood circulation in a patient, such as that in perfusion failure, by measurement of blood flow adjacent a mucosal surface accessible by a mouth or nose and connecting with the gastrointestinal tract or upper respiratory/digestive tract of a patient. The device includes a blood-flow sensor adapted to be positioned adjacent a mucosal surface with a patient's body and measuring blood flow in adjacent tissue and a PCO.sub.2 sensor adapted to be positioned adjacent the mucosal surface and measuring PCO.sub.2. In addition a pH sensor may be used in combination with the blood flow determination. A method of detecting perfusion failure is also disclosed. The method includes utilizing blood-flow measurements in conjunction with a surface perfusion pressure index and/or an optical plethysmography index to more accurately assess perfusion failure. These measurements may also be supplement by taking measurements of pH, sublingual PCO.sub.2, and Sa O.sub.2. The invention affords rapid measurement and detection of perfusion failure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.