Method and apparatus for controlling a medical ventilator
US6390091B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1999 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Feb 3, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/46
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An open- or closed-loop method and corresponding medical ventilator for providing breathing gas to a patient such that the patient exerts a desired work of breathing during pressure support ventilation, and such that the work of breathing of the patient is monitored and the pressure and/or flow rate of the breathing gas provided to the patient is controlled throughout the inspiratory phase to provide a pressure support ventilation level that provides the desired work of breathing in the patient. The medical ventilator includes at least a pressure sensor and a flow rate sensor, disposed in a functionally open ventilator conduit in fluid communication with the lungs of the patient, electrically coupled to a microprocessor to monitor the average respiratory muscle pressure of the patient and to predict the patient work of breathing as a function of the current value of the average respiratory muscle pressure of the patient, to detect when the patient work of breathing is not within a predetermined work of breathing range, and to generate a response signal thereof. Further, the medical ventilator has a driver circuit electrically coupled to the microprocessor and to an actuator of a pn…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.