Room-temperature thermodilution cardiac output: proximal injectate lumen vs proximal infusion lumen.

OBJECTIVE

To assess the accuracy of room-temperature thermodilution cardiac output measurements from the venous infusion port.

DESIGN

Central venous port cardiac output measurements were compared with venous infusion port measurements in 48 right-heart catheters.

INTERVENTION

Three 10-mL injections of 5% dextrose in water were made through each port. The order of port injection was random.

RESULTS

The cardiac outputs were 5.8 +/- 1.8 L/min from both ports, with no difference between ports (paired t test).

CONCLUSION

Room-temperature thermodilution cardiac output determinations from the venous infusion port can be used in place of central venous port cardiac outputs if the central venous port becomes nonfunctional.