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.
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