Pulmonary interface system
US5676132A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1995 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | Dec 5, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/6847
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for sensing the respiratory air of a patient. The device includes a venturi tube through which the patient inspires and expires, the tube having a constricted midportion. The tube also has an inspiration orifice, an expiration orifice, and a central orifice therebetween. An air mass flow sensor is positioned in the tube. A flow direction housing is attached to the tube and has a channel with an inspiration portion, an expiration portion, and a central portion therebetween. The housing also has an inspiration opening providing communication between the tube inspiration orifice and an end portion of the inspiration channel away from the central channel portion, an expiration opening providing communication between the tube expiration orifice and an end portion of the expiration channel portions away from the central channel portion, and a central opening providing communication between the tube central orifice and the central channel portion. This causes a flow of a portion of the respiratory air which the patient inspires to pass through the tube inspiration orifice and flow through the inspiration channel portion to the housing central opening, and a flow of a portion of t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.