A respiration monitor for measuring the respiration of a subject on a mechanical ventilator comprises first transducer means arranged to produce a first signal representative of a respiration status of the subject, second transducer means arranged to produce a second signal representative of a cyclical...http://www.google.de/patents/US5520192?utm_source=gb-gplus-sharePatent US5520192 - Apparatus for the monitoring and control of respiration
