Development of application of catheterization and Doppler ultrasound in assessing pulmonary artery pressure in newborns / 国际儿科学杂志

ABSTRACT

It is well established that pulmonary vascular resistance plays a pivotal role in the postnatal decrease of pulmonary arterial pressure in neonates.Catheterization has been demonstrated that mean pulmonary arterial pressure(PAP) equals or exceeds systemic for as long as 1 hour after birth.Thereafter,a gradual decrease in pressure occurs with the major fall taking place during the first 24 hours.By 3 days of age,the mean pulmonary arterial pressure is less than 50 per cent of that in the systemic circulation.Tricuspid regurgitation(TR) and ductal flow velocity(PDA) have the largest number of confidence steps in the expected range of values.The most repeatable technique is TR,but PDA might also be useful for a serial studies owing to the potential for large change.This paper reviews the PAP of normal full-term infants after birth by catheterization and Doppler ultrasound,in order to provide some clinic basis for pulmonary hypertension identification.