Table 2

Normal range of systemic blood pressure in mm Hg in term infants (numbers in parentheses are 2 SDs below the mean; these can be considered the lower limit of normal during pulmonary hypertension of the newborn management)

AgeSystolicMeanDiastolic
6–18 hours80±13 (54)57±12 (33)43±10 (23)
18–30 hours83±12 (59)60±11 (38)46±10 (26)
3 days±6 hours*84±14 (56)60±12 (36)48±13 (22)
7 days±1 day91±15 (61)67±13 (41)52±11 (30)
  • *For practical purposes, systolic pressure of 55, mean of 35 and diastolic of 25 may be considered as lower limits of normal systemic blood pressure for term infants during the first postnatal week.