• Can J Anaesth · May 2005

    Cardiac output by PulseCO is not interchangeable with thermodilution in patients undergoing OPCAB.

    • Koichi Yamashita, Tomoki Nishiyama, Takeshi Yokoyama, Hidehiro Abe, and Masanobu Manabe.
    • Department of Anesthesiology and Critical Care Medicine, Kochi Medical School, Kohasu, Oko-cho, Nankoku-shi, Kochi, 783-8505, Japan. koichiya@kochi-ms.ac.jp
    • Can J Anaesth. 2005 May 1;52(5):530-4.

    PurposeTo investigate the reliability of cardiac output assessed by arterial pressure waveform (PulseCO) in comparison with bolus thermodilution measurements in patients undergoing off-pump coronary artery bypass grafting (OPCAB).Methods23 patients who underwent OPCAB were enrolled in this study. After premedication with oral diazepam 10 mg, anesthesia was induced with midazolam, fentanyl and vecuronium. After induction, radial artery and pulmonary artery catheters were inserted. Cardiac output was measured simultaneously by the PulseCO and the bolus thermodilution method using the Vigilance monitor: 1) after sternotomy, 2) after opening the mediastinum, and 3) at the end of surgery. The PulseCO was calibrated initially with cardiac output determined by the thermodilution method after induction of anesthesia.ResultsThe correlation coefficients between the two techniques at the three measurement periods were: 1) R2 = 0.49, 2) R2 = 0.52, 3) R2 = 0.55. The limits of agreement (bias +/- 2 SD of bias) were: 1) 0.71 +/- 2.66, 2) 0.30 +/- 1.97, 3) 0.76 +/- 3.85 L.min(-1).ConclusionsCardiac output by PulseCO is not interchangeable with cardiac output measured by thermodilution in patients undergoing OPCAB.

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