The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 1983
Filed:
Jun. 22, 1981
Abraham Boyarsky, Montreal, CA;
Jack Friedman, Cote St. Luc, CA;
Athanasios Christodoulopoulos, St. Laurent, CA;
Rock Lee, St. Hubert, CA;
Canadian Patents & Development Limited, Ottawa, CA;
Abstract
The breathing cycle of a patient is controlled to achieve proper ventilation and at the same time minimize the work of distension of the lungs. Oxygen enriched air is delivered to the patient during the inspiration period such that the pressure waveform is a ramp function having initial and final values which are dependent on the resistance, compliance and alveolar volume of the lungs. The apparatus includes a source of oxygen enriched air at a regulated pressure and a pneumatically controlled pressure reducing valve for reducing the pressure of the oxygen enriched air for delivery to the patient. The valve is controlled by a transducer which converts an electrical control signal into a pneumatic control signal. The electrical control signal which is generated by an electronic control circuit, is a function of the parameters of the patient's lungs.