Although pulmonary artery catheters provide physiologic information pr
eviously unobtainable by other means, their effect on patient outcome
remains questionable. Risks associated with their use, the inherent in
accuracy of the data collected, problems with general interpretation o
f data, and the potential for ineffective, inappropriate, and injuriou
s interventions based on data provided by pulmonary artery catheteriza
tion make it an unproven therapy when applied to large patient groups.
The notion that pulmonary artery catheterization does not improve pat
ient outcome has recently been supported by literature reviews, clinic
al investigations, and surveys of patient outcome.