1-12 Months — Second Task Force 1987
The Infant Blood Pressure Calculator assesses blood pressure in infants aged 1-12 months postnatal age, using two layers: an always-available hypotension screen (systolic BP under 70 mmHg, sourced from PALS) and a full percentile classification (Normal / Elevated / Hypertension) by age in months and sex, digitized from the Second Task Force on Blood Pressure Control in Children (Pediatrics, 1987). The app notes that the AAP 2017 guideline itself defers to this 1987 Task Force reference for infants, since AAP 2017 publishes no infant-specific data of its own.
The app directs postmenstrual age up to about 46 weeks to its Neonatal BP calculator, postnatal age 1-12 months to this Infant BP calculator, and age 1 year and up to its Paediatric BP (AAP 2017) calculator, because each uses a different reference dataset.
Systolic BP below 70 mmHg, which the app attributes to Pediatric Advanced Life Support (PALS) as the infant hypotension floor.
They come from the Report of the Second Task Force on Blood Pressure Control in Children (Pediatrics, 1987;79(1):1-25), which the app states AAP 2017 itself references for this age band; the values were digitized from the original Figure 1 and 2 percentile curves.
The app cautions that a reading above 70 is not automatically confirmed normal for age — it should still be checked against the percentile classification (50th/90th/95th) rather than relying on the hypotension screen alone.
Yes — the app notes the original norms were auscultatory/Doppler-based and may read differently on modern oscillometric monitors, and that infant BP swings with state (crying, feeding, pain, wakefulness), so it recommends measuring calm and supine in the right arm with an appropriately sized cuff.