Please note that this site is unsupported on Internet Explorer, and may not function as intended.

We recommend upgrading to the latest version of Microsoft Edge, Google Chrome or Firefox.

Test & Collection Guide

Pathology staff view

 New search...

Keyword Search:

Test name:

   

Manual search:

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

NUMBER

ALL

Dexamethasone Suppression Test

Laboratory:
Biochemistry
Specimen types:
Serum
Container types:
Serum tube with gelSerum tube with gel
Collection Instructions:

The Dexamethasone Suppression Test (DST), also referred to as the "low dose DST" or "overnight DST", is a screening test for Cushing's Syndrome.

The requesting clinician should give the patient a 1mg dexamethasone tablet with instructions to take it at 11 pm. (for outpatients: the tablet should only be taken Sunday to Friday evening, to ensure collection next day.)

The patient must present to the collection centre the following morning ( preferably before 10am ) and have a serum sample taken for cortisol analysis.

If there is any doubt do not send the patient away without documented consultation with a senior scientist. ( 9895 3548)

Endocrine consultation is suggested for "High Dose DST".

Dexamethasone levels will not be performed without consultation with Endocrinology and the Chemical Pathologist.

Frequency:
Daily
Result Turnaround Time:
2-4 hours
Reference Interval:

Cortisol < 50 nmol/L is considered normal and NOT consistent with Cushing's Syndrome.

Laboratory Use Only

  

Accessing Results

EMR: Pathology results are available via EMR.

Auscare: If EMR is unavailable, results can be accessed through Auscare. Don’t have an Auscare login? Complete the Auscare User Form.

To access Auscare, see instructions.

 

Forms & Collection Guides

Consent Form – Non-Medicare Tests
For tests not covered by Medicare. Download Form  

Pathology Request Form
Printable referral form for submitting pathology requests. Download Form.

Microbiology Swab Collection Guide 
Step-by-step instructions for correct swab collection. Download Guide.

Preferred Order of Draw
Instructions to ensure accurate blood collection and results. View Instructions 

 

Feedback

Eastern Health Pathology values your feedback as an important way to improve our services. Share concerns, suggestions, or compliments via the Eastern Health Feedback Service.