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:
Feb. 03, 2004
Filed:
Apr. 09, 2002
Iikka Korhonen, Lempäälä, FI;
Instrumentarium Corp., Helsinki, FI;
Abstract
The invention relates to a method for monitoring a condition of a patient under anaesthesia or sedation. In the method a signal (S) is acquired representing a cardiovascular activity of the patient, and periodically repeated waveforms (P) are detected, followed by calculation of time intervals (T ) between, and/or pressures (B ) from, and/or temporal rates (R ) from successive waveforms. Next at least one of the following—a mathematical time series (T , T . . . T , T . . . ), or a mathematical pressure series (B , B . . . B , B . . . ), or a mathematical rate series (R , R . . . R , R . . . ) is/are formed. Further in the method said time series and/or said pressure series and/or said rate series is mathematically filtered to provide successive average values ({overscore (T)} ; {overscore (B)} ; {overscore (R)} ) over a predetermined first time period (&tgr;), and a substantial decrease, or increase respectively in said average values is detected.