ADA deaminase, Fluid

Diagnostic Use

Used as an adjunctive test in the diagnosis of tuberculosis pleural effusion

Department

Specialist Biochemistry

Delphic Registration Code

ADAF

Synonyms

Adenosine deaminase

Turnaround Time

2 weeks

Test Code

5799

Specimen Type

• pleural_fluid - Pleural Fluid

Specimen Requirements

Tube/Container Type:

Preferred

• Pottle

Paediatric Specimen Requirements

Tube/Container Type:

Preferred

• Pottle

Preferred Sample Volume (ml)

0.2

Additional Specimen Information

Pre-Testing Requirements Centrifuge fluid to remove cells or clots as soon as practicable.

Note degree of any blood-staining on form.

The ADA assay is affected quite badly by haemolysis.
The Roche system ADA becomes unreportable with a haemolysis index of 200 ( by way of comparison potassium is affected at a level of 150).

Aliquot Instructions

Minimum Volume (ml)

0.2

Transport to Lab

Ambient (8 - 24 degrees Celsius)
If overnight - Chilled (2 - 8 degrees Celsius)

Additional Referral/Aliquot Information

Do not freeze

Interpretation

Adenosine deaminase values >30 U/L are suggestive of tuberculosis, but high values may also be seen in some carcinomas, particularly lymphomas (these tend to produce the highest results).

Reference Intervals

<30 U/L

Test Method

Roche Diazyme adenosine deaminase on Abbott CI8000.

This assay is NOT accredited for CSF, pericardial or ascites fluids

Non-Funded Test Cost

$59 (Exclusive of GST)

Billing Code

5799

Attach sticky label or write DO NOT FREEZE on specimen bag (contact lab for appropriate label).

Referred to Middlemore Hospital,Otahuhu, Auckland 1640

Contact Information

Enquiry Form