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. 09, 2013
Filed:
Dec. 02, 2005
Erkki Heinonen, Helsinki, FI;
Rene Coffeng, Helsinki, FI;
Franck Verschuren, Sterrebeek, BE;
General Electric Company, Schenectady, NY (US);
Abstract
A method and apparatus for determining the presence or absence of a pulmonary embolism (PE) in a patient. The breathing gas COpartial pressure (PCO) during the expiration of breathing gases by the patient, the end tidal (EtCO), COpartial pressure, and the COpartial pressure (PaCO) of the blood are measured. The volume (V) of breathing gases expired during the expiration of breathing gases by the patient is also measured and a relationship between changes in breathing gas COpartial pressure (PCO) and changes in breathing gas volume (V) in an alveolar expiration phase of patient expiration is determined. The difference between the blood COpartial pressure (PaCO) and the end expiration COpartial pressure is divided by the relationship between PCOand V produce a quantity which is compared to a threshold value. If the quantity is below the threshold value, the absence of a pulmonary embolism is indicated.