Ammonia, plasma | KK Women's and Children's Hospital

Specimen Container

Lithium heparin 2 mL tube

(To be obtained from DPLM Client Services, after office hour call extension 1383)

Specimen Requirement

Whole blood
0.4 mL blood

Invert blood 5 times after blood collection ensures the anticoagulant is well mixed with the blood. This will ensure results are reliable.

Specimen Storage/Transport

Place this in a biohazard specimen bag and immerse this bag into another bag with crushed ice. Send immediately to lab.

Orderable as Urgent?

Yes

Turn Around Time

Average 1 hr (30 mins - 1.5 hrs)

Reference Value(s)

Testing Laboratory Location

KKH

Laboratory

Clinical Chemistry

Contact Number

6394 1383

Day and Time Performed

Daily, 24 hrs

Orderable on CPOE?

Yes

Downtime Form

Clinical Chemistry - Form A

Additional Information

Critical Values:
≤ 1 month: >120 µmol/L
> 1 month: >100 µmol/L

Change History Notes

12 Jul 2024 12:00 PM

Updated Reference Value(s).
04 Jul 2024 08:00 AM

Updated Reference value and Additional information.
19 Oct 2021 11:20 AM

Updated Specimen Container, Specimen Requirement and Reference Value(s).

Last Updated - 20 Jun 2025