Apparatus for correlating the respiratory and cardiac cycles

US4031884A · kind A · utility

Assignee

• Institut National de la Sante et de la Recherche Medicale (INSERM) · FR

Inventor

• Daniel Georges Christian Henzel · Villiers-sur-Marne, FR

Key dates

• Filing date: Jun 2, 1975
• Grant date: Jun 28, 1977
• Expiry date: Jun 2, 1995

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B6/507
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An apparatus for correlating the respiratory and cardiac cycles includes a circuit for defining a chosen period in the progress of the respiratory cycle as the end of a regulatable delay beginning when the ascending front of the inspiratorial pressure reaches a regulatable level as well as a circuit for defining a chosen period in the progress of the cardiac cycle as the end of a regulatable delay beginning when the differential dV/dt of the blood pressure reaches a regulatable level. An operator such as a terminal relay is activated upon the coincidence of these two periods in time after a regulatable delay and during a regulatable period.