Anesthesia ventilating apparatus having a breathing circuit and control loops for anesthetic gas components
US5094235A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 1989 |
| Grant date | Mar 10, 1992 |
| Priority date | — |
| Expiry date | May 10, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/432
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to an anesthesia ventilating apparatus having a breathing circuit and a plurality of control loops for the anesthesia gas, the anesthesia agent and the carbon dioxide exhaled by a patient. A disconnect switch is provided for opening and closing the control loop for adjusting the anesthesia agent. When this control loop is opened, a control unit changes the desired value of the anesthetic agent to a desired flushing value thereof. The control unit includes a processor which monitors the time-dependent course of the concentration of the anesthetic agent to determine breathing circuit system parameters and then computes the adjusting parameters of a controller in the control loop for adjusting the anesthetic agent. A method of operating the apparatus is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.