Esoterix
Synonyms
Plasma Renin Activity
Expected Turnaround Time
2 - 5 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Specimen Requirements
Specimen
EDTA plasma
Volume
2 mL
Minimum Volume
0.4 mL (Note: This volume does not allow for repeat testing.)
Container
Lavender-top (EDTA) tube
Collection
Use EDTA plasma only! Strictly frozen. Collect 4 mL of blood in lavender-top venipuncture tube. Mix gently by inversion. Centrifuge immediately after collection. Separate and freeze plasma immediately. Please note whether recumbent or upright sample.
Storage Instructions
Store and ship frozen in plastic vial.
Test Details
Methodology
Liquid Chromatography/Mass Spectrometry (LC/MS-MS)
Reference Interval
Age Range (ng/mL/h) 0 - 11 months 2.000 - 37.000 1 - 3 years 1.700 - 11.200 4 - 5 years 1.000 - 6.500 6 - 10 years 0.500 - 5.900 11 - 15 years 0.500 - 3.300 >15 years 0.167 - 5.380 Dietary sodium levels during this period prior to testing can affect renin levels. Sodium restriction tends to cause an increase in renin activity, while supplementation can result in lower values.