Measurement of Respiration Rate from Central Venous Pressure in the Critically Ill Patient

Author

Meagher, P.F. ; Jensen, R.E. ; Weil, M.H. ; Shubin, H.

Author_Institution

Shock Research Unit and the Department of Medicine, University of Southern California School of Medicine and the Los Angeles County Hospital, Los Angeles, Calif., and the International Business Machines Corporation, Yorktown Heights, N. Y.

Issue

2

fYear

1966

fDate

4/1/1966 12:00:00 AM

Firstpage

54

Lastpage

57

Abstract

Central venous pressure is measured in critically ill patients. The venous pressure is transmitted to a strain gauge transducer through a catheter inserted into the right atrium or superior vena cava. Through a signal conditioning technique using a low-pass filter with a cutoff at 0.8 c/s, the pulsatile variations related to heart action that are superimposed on the low-frequency respiratory changes are removed. The output of the respirometer is sampled every five minutes by art IBM 1710 control system computer and printed on an output typewriter, together with a number of variables, in a comprehensive patient monitoring system.

Keywords

Capacitive sensors; Catheters; Control systems; Electric shock; Heart; Low pass filters; Pressure measurement; Radiation detectors; Testing; Transducers; Blood Pressure Determination; Humans; Monitoring, Physiologic; Respiration;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/TBME.1966.4502406

Filename

4502406