Wallach's Interpretation of Diagnostic Tests: Pathways to Arriving at a Clinical Diagnosis (1122 page)

PLASMA RENIN ACTIVITY (PRA)

   Definition

   Renin activity is measured indirectly by the ability of the patient’s plasma to generate angiotensin.

   
Normal range:

   
Cord blood:
4.0–32.0 ng/mL/hour

   
Newborn
(1–7 days): 2.0–35.0 ng/mL/hour

   
Child, normal-sodium diet, supine:

   1–12 months: 2.4–37.0 ng/mL/hour

   1–3 years: 1.7–11.2 ng/mL/hour

   3–5 years: 1.0–6.5 ng/mL/hour

   5–10 years: 0.5–5.9 ng/mL/hour

   10–15 years: 05–3.3 ng/mL/hour

   
Adult, normal-sodium diet

   Supine: 0.2–1.6 ng/mL/hour