MRI/NMR-compatible, tidal volume control and measurement systems, methods, and devices for respiratory and hyperpolarized gas delivery
US7275540B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2004 |
| Grant date | Oct 2, 2007 |
| Priority date | — |
| Expiry date | Jun 1, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2202/0291
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Ventilator systems include: (a) a mass flow controller; (b) a gas delivery valve in communication with the mass flow controller and configured to selectively dispense a plurality of different gases to a subject; (c) a first gas source in fluid communication with the gas delivery valve; (d) a second gas source in fluid communication with the gas delivery valve; (e) a first pressure sensor located upstream of the gas delivery valve; (f) a second pressure sensor located downstream of the gas delivery valve; and (g) a controller operatively associated with the first and second pressure sensors and the mass flow controller, the controller comprising computer program code that monitors the pressures measured by the first and second pressure sensors and automatically dynamically adjusts the flow rate of the mass flow controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.