Renin

If both Aldosterone and Renin are ordered together, they must be collected at the same time and ordered as Aldosterone/Renin Ratio (ALDOS/REN) 

Collections performed at acute care (RRL) sites and all PSCs.
Test cannot be collected by Mobile Collection Service (MCS).


Specimens are to be collected before 10:00 due to fluctuations in renin levels throughout the day.

1 x 4 mL lavender top EDTA tube

2 x 1.5 mL plasma

Minimum Whole Blood Volumes for Micro-Collections using Microtainers

Store tubes for renin collection at 4ºC (refrigerator)
Keep tubes cold (immerse in ice water) before collecting and immediately after collection.
DO NOT use tourniquet.

Prompts:
Position - Is the patient upright or lying down?  (PSC patients will be upright)
Minutes in Position - How many minutes has the patient been in this position?  (PSC patients - calculate how many minutes the patient has been awake)

If physician has provided Lasix information, add as an order note.

Mix and chill immediately after collection. 
Centrifuge at 4ºC + 2ºC as soon as possible.
Remove plasma to 2 chilled plastic tubes. 

RRL and extra-regional:
Process and transport frozen to DSC.

PSC:
Process and transport frozen or attached to ice pack to DSC.

DSC:
Freeze specimens upon receipt in lab; ensure frozen specimens do not thaw.