Evaluating indirect blood pressure measurement techniques: a comparison of three systems in infants and children.

The systemic arterial blood pressures obtained in infants and children utilizing three indirect measuring devices--Arteriosonde 1010. Infrasonde 3000, Pedisphyg system--were compared to each other and to intra-arterial pressure measured directly. The results indicate that Arteriosonde performs considerably better than Infrasonde; nevertheless, the Arteriosonde values are often only approximations of true systole and diastole. The Pedisphyg system yields accurate, reproducible values for systole; however, the system is not designed to determine diastolic blood pressure.