Test Entry - Detail

Growth Hormone Suppression Test

General

Clinical Use:

A GTT with glucose and GH measured every 30 mins for 2 hours post glucose load. Used for diagnosis of Acromegaly or to assess residual disease post surgery. This test should not be performed in patients with uncontrolled diabetes.

Availability:

Samples are tested Monday-Friday.

Aliases/Synonyms:

GH Suppression Test, GH with GTT, Glucose Tolerance Test with Growth Hormone, Growth Hormone with GTT, GTT with GH, OGTT with GH, Oral Glucose Tolerance Test with Growth Hormone,

Code:

GTTGH

Handling Instructions (to laboratory):

Send samples chilled.

Hyperlink:

https://fasttrack.ict.pathwest.com.au/Portal/SOP-796.doc

Reference Interval:

HEDTA Guidelines 2021
Normal response: GH < 1.0 ug/L
Postop remission: GH <0.4 ug/L

Collection Requirements

Container:

Fluoride Oxalate (GREY), and, Serum Sep. Tube-SST (GOLD),

Sample Type:

See container

Minimum Collection Volume:

1mL (each sample)

Collection Instructions:

Patient must be fasting.
Grey AND Gold samples should be collected at baseline,30,60,90 and 120 minutes post glucose load.
Glucose Load = 75g for adults, 1.75g/kg for children (maximum 75g).

Processing Requirements

Alternate Containers:

Processing Instructions:

Minimum Assay Volume:

200uL

Stability:

Transport Instructions (to testing laboratory):

Send samples chilled.

Testing Locations

Performed at:

Section	Department	Site	Contact Phone
Core	Biochemistry	Fiona Stanley Hospital	6152 8140
Core	Biochemistry	QEII Medical Centre	6383 4093

Last Updated : 15-06-2022 14:05