Method for determining haemodynamic parameters

Details Method for determining haemodynamic parameters Method for determining haemodynamic parameters

2005-02-16

2010-10-19

Nasser, Robert L (Department: 3735)

Surgery

Diagnostic testing

Cardiovascular

C600S490000, C600S500000, C600S486000

Reexamination Certificate

active

07815576

ABSTRACT:
A method for determining haemodynamic parameters from patient pressure signals includes receiving patient pressure signals from a measurement receiver to which vessel pressures measured in the body of a patient are supplied, selecting and determining a patient pressure signal as reference pressure signal from the patient pressure signals sent from the measurement receiver, dividing the patient pressure signals and reference pressure signal into segments, and examining these segments for artifacts with methods in the time range by using the first derivative with respect to time of the pressure signals wherein artifact afflicted segments are discarded. The method further includes determining the start and end of a heart beat by the reference pressure signal and using the non-discarded segments of the patient pressure signals for calculating haemodynamic parameters.

REFERENCES:
patent: 5865758 (1999-02-01), Louzianine
patent: 6290652 (2001-09-01), Wellnhofer
patent: 2004/0024294 (2004-02-01), Wellnhofer
patent: 198 20 844 (1999-06-01), None
patent: 100 49 734 (2002-04-01), None
International Search Report, dated Jun. 28, 2005, corresponding to PCT/DE2005/000304.
International Preliminary Report on Patentability dated Oct. 4, 2006 for corresponding PCT application No. PCT/DE2005/000304.

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