Abstract: A respirator used to replace or assist the respiratory function and automatically regulate the respiration gas flow and pressure during the inspiration phase and expiration phase comprising means for measuring the flow and pressure of respiration gas and providing electrical output signals, valve means including an adjustable valve for controlling the flow and pressure of respiration gas past the measuring means, and electronic regulating means connected with the measuring means and valve means for comparing the electrical signals with predetermined values including standard values and for generating a regulating signal for adjusting the valve means.

Abstract: Regulation of the flow and pressure of the respiration gas in a respirator coupled to a patient is disclosed in regard to a respirator arrangement having a flow and pressure measuring device arranged proximate the patient connection for determining the flow and pressure of the respiration gas and converting the magnitudes, measured into electrical signals and also valve means arranged between the respiration gas source and the measuring device for controlling the flow and pressure of the respiration gas. Means are provided for obtaining a control signal for modulating the valve means by comparing the actual values measured for the flow and pressure with nominal values which themselves are calculated from preselected fixed values and said actual values.