Key result
Non-invasive cardiac index measurement using the USCOM device showed a bias of 0.22 and wide limits of agreement (-1.17 to 1.62) compared to pulmonary artery catheters, limiting clinical utility.
Why the study?
Does the non-invasive USCOM Doppler device accurately measure cardiac index compared to a pulmonary artery catheter in postoperative cardiac patients?
Observational (n=30)
Single-blind
Does the non-invasive USCOM Doppler device accurately measure cardiac index compared to a pulmonary artery catheter in postoperative cardiac patients?
Mean Difference: 0.22
The non-invasive USCOM device showed limited clinical utility and poor interchangeability with pulmonary artery catheters for measuring cardiac index in postoperative cardiac patients.
Authors
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USCOM should not substitute for pulmonary artery catheters in postoperative cardiac patients; leaves open need for validated non-invasive cardiac output monitors.
Chan et al. (2006) conducted an observational in Postoperative cardiac patients requiring haemodynamic support (n=30). USCOM device (non-invasive continuous wave Doppler) vs. Pulmonary artery (PA) catheter was evaluated on Cardiac index measurement comparison (bias and limits of agreement) (Bias 0.22). Non-invasive cardiac index measurement using the USCOM device showed a bias of 0.22 and wide limits of agreement (-1.17 to 1.62) compared to pulmonary artery catheters, limiting clinical utility.
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