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:
Oct. 07, 1997
Filed:
Sep. 26, 1996
Robert Q Tham, Madison, WI (US);
James R Homuth, DeForest, WI (US);
Ohmeda Inc., Liberty Corner, NJ (US);
Abstract
A system is provided for detecting the breakthrough of CO.sub.2 into the inspiratory limb of a substantially closed circle patient breathing circuit having a CO.sub.2 absorber to remove CO.sub.2 from the continuously recirculating gases. The CO.sub.2 is detected by a gas analyzer located in the inspiratory limb of the patient breathing circuit. Upon detection of that CO.sub.2, the system increases the flow of fresh gas into the circle patient breathing circuit to a flow rate in excess of the minute volume of gas being delivered at that time to the patient. The increased flow of fresh gas basically prevents the further flow of CO.sub.2 from the expiratory limb into the inspiratory limb, thus preventing the CO.sub.2 from being inhaled by the patient.