METHOD AND APPARATUS TO DETERMINE THE END OF THE SYSTOLIC PART OF A PRESSURE CURVE

• US 20110040195A1
• Filed: 11/24/2008
• Published: 02/17/2011
• Est. Priority Date: 11/28/2007
• Status: Active Grant

• Current Assignee: Edwards Lifesciences IPRM AG (Edwards Lifesciences Corporation)
• Original Assignee: Edwards Lifesciences AG (Edwards Lifesciences Corporation)
• Inventors: Knoll, Reinhold, Pfeiffer, Ulrich, Borg, Ulf
• Granted Patent: US 8,506,496 B2
• Time in Patent Office: Days
• US Class Current: 600/485
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/029 Measuring or recording blood output from the heart, e.g. minute volume A61B8/065 takes precedence

Abstract

The invention relates to a method and an apparatus for determining the systolic phase interval (SP) of an arterial pressure curve with a starting point (t0) of the systolic phase interval (SP) and an end point (tN) of the systolic phase interval (SP) wherein a QT interval is defined as the start of the Q wave and the end of the T wave in the hearts electrical cycle and wherein the determination of the end point (tN) of the systolic phase interval (SP) is restricted to the measured points of arterial pressure which fulfill the condition that the difference in time between the end point (tN) to be determined of the systolic phase interval (SP) and the starting point (t0) of the systolic phase interval (SP) is smaller than the QT interval.

Claims

1. Method for determining the systolic phase interval of an arterial pressure curve a starting point of the systolic phase interval and an end point of the systolic phase interval wherein a QT interval is defined as the start of the Q wave and the end of the T wave in the hearts electrical cycle characterized in that the determination of the end point of the systolic phase interval is restricted to the measured points of arterial pressure which fulfill the condition that the difference in time between the end point to be determined of the systolic phase interval and the starting point of the systolic phase interval is smaller than the QT interval.

2-12. -12. (canceled)