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RENPE / 500278E
RENIN, PEDIATRIC, PLASMA

Test Code RENPE / 500278E 
Test RENIN, PEDIATRIC, PLASMA 
Methodology RIA of angiotensin I generated at pH 5.5 at multiple time-points 
Specimen Draw blood in a lavender-top (EDTA) tube, mix gently by inversion. Centrifuge immediately after collection. Do not leave blood at room temperature. Separate and freeze 2.0 mL EDTA (minimum volume: 0.4 mL - does not allow for repeat testing) plasma immediately in screw-capped, plastic vial. Send specimen frozen.
Note whether recumbent or upright sample. 
Reference Values PREMATURE
1 - 7 days: 1100 - 16,700 ng/dL/hr

FULLTERM
1 - 7 days: 200 - 3500 ng/dL/hr
Plasma renin activity in newborsn is elevated and highly variable. Premature infants generally exhibit substantially higher values ranging from 1100 - 16,700 ng/dL/hr.

CHILDREN*
31 days - 11 months: 235 - 3700 ng/dL/hr
12 months - 2 years: 171 - 1115 ng/dL/hr
3 - 4 years: 100 - 650 ng/dL/hr
5 - 9 years: 50 - 585 ng/dL/hr
10 - 14 years: 50 - 330 ng/dL/hr
*Normal Sodium Diet, Supine Posture

Note: Normal studies of plasma renin activity in young children and adolescents are incomplete. 

Analytic Time 2 Days 
Day(s) Test Set Up Monday through Friday 
CPT Code(s) 84244