Abstract: An improved anaesthetical circuit with reverse inhalation is equipped with an injector of escaped anaesthetics connected by an inlet pipe to a valve in which a feeding pipe, leading from a source of constant flow, discharges a signal from a differential pressure indicator, being led into the valve through a conduit. The differential pressure indicator is fed from an energy source, on one hand, together with a conduit pipe leading from a drive pipe into the pressurized chamber of the differential pressure indicator, and a pipe leading from a connection pipe into the vacuum chamber of the differential pressure indicator, on the other hand. A connection pipe connecting an outlet pipe of the injector through a check valve with a rubber bag, which is arranged in a cylinder attached to the anaesthetical circuit.

Abstract: A multinozzle generator for high frequency ventilation of lungs reducing the danger of damages to lungs due to ventilation overpressure and enabling a ventilation of patients without limitation of age. The generator can be adapted to different throughflow characteristics and elastic resistance of the lungs. The generator is suitable for cleaning of air passages of the patient without interruption of the ventilation; it can perform selective ventilation of lungs by means of two generators using different overpressure and a simple generation of a final expiration overpressure.