Stress test devices and methods
US7311668B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 2005 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Jan 27, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/097
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
One method for diagnosing a cardiovascular-related condition in a breathing person comprises interfacing a valve system to the person's airway. The valve system is configured to decrease or prevent respiratory gas flow to the person's lungs during at least a portion of an inhalation event. The person is permitted to inhale and exhale through the valve system. During inhalation, the valve system functions to produce a vacuum within the thorax to increase blood flow back to the right heart of the person, thereby increasing blood circulation and blood pressure. Further, at least one physiological parameter is measured while the person inhales and exhales through the valve system. The measured parameter is evaluated to diagnose a cardiovascular condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.