A COMPARATIVE STUDY OF PULSED DOPPLER CARDIAC OUTPUT (PDCO) AND THERMODILUTION CARDIAC OUTPUT (TDCO)

Abstract

Comparison of PDCO, calculated from aortic flow velocity, and TDCO in critically ill children has not been reported. We prospectively examined all pts with Swan-Ganz catheters over 3 months. PDCO was determined using the Cardioflo Model CF1 computer (Cardionics, Inc.). Aortic diameter was determined by 2-D sonogram. TDCO was determined simultaneously by iced saline injection. Study pts (N=13) were grouped by wt: Grp 1 ≤ 20 kgs and Grp 2 > 20 kgs. In 4/5 Grp I pts, satisfactory peak velocity signals were obtained and 14 paired CO measurements were made. No significant difference was found between any paired PDCO/TDCO measurements ( Wilcoxon's rank sum). PDCO correlated excellently with TDCO ( r= 0.90, TDCO= .69 PDCO + .96). Satisfactory studies were not obtained in the other Grp 1 pt (pneumomediastinum) nor in any of 8 Grp 2 pts. CONCLUSION: Noninvasive PDCO measurement compares favorably with TDCO in critically ill children ≤ 20 kgs without pneumomediastinum. Its utility in children > 20 kgs could not be demonstrated.

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Castello, F., Notterman, D., Wilkinson, J. et al. A COMPARATIVE STUDY OF PULSED DOPPLER CARDIAC OUTPUT (PDCO) AND THERMODILUTION CARDIAC OUTPUT (TDCO). Pediatr Res 21, 198 (1987). https://doi.org/10.1203/00006450-198704010-00194

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