Apparatus for automatically monitoring body functions

US4403215A · kind A · utility

Assignee

• Hellige GmbH · DE

Inventors

• Gerhard Hofmann · Großhabersdorf, DE
• Hermann Taaks · Stegen, DE

Key dates

• Filing date: Apr 17, 1981
• Grant date: Sep 6, 1983
• Expiry date: Apr 17, 2001

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B5/113
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A respiration monitor for use in an apnea monitor is disclosed in which a threshold value signal is automatically generated proportional to the average value of the monitored impedance of the subject during a base period selected by the operator. A comparator circuit operates to indicate respiration when the ratio between the threshold value signal and the impedance signal reaches a predetermined proportionality factor.