Test Entry - Detail

Saline Suppression Test

General

Clinical Use:

This is a confirmatory test for Primary Aldosteronism.
This booked procedure involves collecting "Pre-saline" samples for Renin, Aldosterone, Cortisol and potassium then the patient is infused with 2 litres of 0.9 % normal saline over 4 hours.
Following saline infusion, "Post-saline" samples are collected for Renin, Aldosterone, Cortisol and potassium.

Availability:

Samples are tested Monday-Friday.

Code:

SALST

Handling Instructions (to laboratory):

Send sample ambient.

Hyperlink:

Unit of Measure:

Refer to reference interval

Reference Interval:

Contact Fiona Stanley Hospital Chemical Pathology Registrar for information via 6152 2222.

Collection Requirements

Container:

EDTA x 2 (LAVENDER), and, Lithium Heparin-PST (GREEN),

Sample Type:

Minimum Collection Volume:

1mL

Collection Instructions:

This is a booked procedure.
Refer to Duty Biochemist prior to collection of samples.
Please use request forms below for ordering.
Pre-Saline
Post-Saline

Processing Requirements

Alternate Containers:

Processing Instructions:

Collection	Container	Tests	Processing instructions	Transport instructions
Pre-saline	LAVENDER	Aldosterone, Renin & Cortisol	Centrifuge, separate and freeze sample	Send separated sample frozen on dry ice
Pre-saline	GREEN	Potassium	Centrifuge	For urgent potassium at collection lab
Post-saline	LAVENDER	Aldosterone, Renin & Cortisol	Centrifuge, separate and freeze sample	Send separated sample frozen on dry ice
Post-saline	GREEN	Potassium	Centrifuge	For urgent potassium at collection lab

Do NOT refrigerate LAVENDER tubes as refrigeration will falsely increase Renin concentration in the sample.

Minimum Assay Volume:

500uL

Stability:

Transport Instructions (to testing laboratory):

Refer to Processing Instructions.

Testing Locations

Performed at:

Section	Department	Site	Contact Phone
Special Chemistry	Biochemistry	Fiona Stanley Hospital	6152 2830

Last Updated : 23-04-2026 14:57