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:
May. 29, 1990
Filed:
Nov. 23, 1988
Jacob Y Wong, Santa Barbara, CA (US);
Evionics, Inc., Santa Barbara, CA (US);
Abstract
An apnea detector uses an active pulsed source of radiation to monitor the respiration of a patient. Radiation from the source is formed into a collimated beam that is directed through the space into which the patient is breathing. The exhaled gases contain a smaller concentration of oxygen and a larger concentration of carbon dioxide compared with the atmosphere. Each exhalation of the patient produces a small cloud of the exhaled gases, which rapidly diffuse and disperse. Corresponding to the appearance and disappearance of these clouds of gas, the transmission of the collimated beam will vary in step with the patient's breathing. The fluctuations in the transmitted radiation are analyzed by a signal processor which generates an alarm signal when either the magnitude or the frequency of these fluctuations falls outside of preset limits. Either carbon dioxide or oxygen may be monitored as the absorbing gas.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile