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Arterial Blood Pressure in the Very Low Birthweight Neonate

ABSTRACT. The noninvasive oscillometric technique of arterial blood pressure determination was evaluated in fifteen very low birth weight neonates (<1400 g). Measurement of invasive umbilical artery catheter pressure was used as a reference standard. By using a cuff width to arm circumference ratio of 0.33–0.42, mean blood pressure was overestimated by 6.2 (7.2) mmHg (mean and 1 SD), p<0.001. More accurate mean blood pressure measurements were recorded with a cuff width to arm circumference ratio of 0.44–0.55. Measurements of systolic and diastolic blood pressure showed similar results.