Adaptive controller for automatic ventilators
US5388575A · kind A · utility
Inventor
Key dates
| Filing date | Sep 25, 1992 |
| Grant date | Feb 14, 1995 |
| Priority date | — |
| Expiry date | Sep 25, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/205
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An automatic controller utilizes a pulse oximeter signal to regulate the oxygen mixture output, peak expiratory end pressure, and inspiratory ventilation time from a positive pressure respiratory assist ventilator. The pulse oximeter senses a patient's hemoglobin saturation and pulse rate by an optical sensor to develop a signal which is used by calculator to determine the patient's corresponding partial pressure of arterial blood. The calculated partial pressure of arterial blood is then used by the calculator in determining the level of inspired oxygen, peak expiratory end pressure, and inspiratory ventilation time provided to the patient. The calculator generates a signal to control the level of inspired oxygen, expiratory end pressure, and inspiratory ventilation time output from a positive pressure respiratory assist ventilator. The level of inspired oxygen, peak expiratory end pressure, and inspiratory ventilation time provided from the ventilator to the patient is varied to maintain a desired predetermined partial pressure of arterial oxygen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.