Abstract
In the presence of Tricuspid Regurgication (TR), Doppler ultrasound can accurately determine systolic pulmonary artery pressure (PAP) by application of the Bernoulli equation to the maximal TR jet velocity. 152 serial ultrasound scans were performed from birth to extubation on 20 neonates ventilated for HMD (27-39 weeks, 945-3020g). Maximal TR jet velocity was measured using continuous wave Doppler. Systemic blood pressure (BP) was measured directly by intraarterial catheter or by Doppler sphygmomanometry. PAP was expressed as a percentage of systemic BP (PAP/BP%). Results were compared with values obtained from 17 healthy preterm neonates examined serially from birth to 72 hours.
Results: Maximal TR velocity was measurable on 68 occasions:
Serial estimations of PAP can be made in neonates with HMD due to the presence of TR. Pulmonary hypertension is a part of HMD which resolves as oxygen requirements fall.
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Skinner, J., Hunter, S. & Hey, E. 58 PULMONARY ARTERY PRESSURE IN HYALINE MEMBRANE DISEASE (HMD). Pediatr Res 28, 286 (1990). https://doi.org/10.1203/00006450-199009000-00082
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DOI: https://doi.org/10.1203/00006450-199009000-00082
