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