Test Directory
TB Quantiferon Gold 4 tube Assay
Containers - Adult
TB Quantiferon 4 tube Assay
|
Volume Range
0.8 - 1.0 ml |
Containers - Child
|
TB Quantiferon 4 tube Assay
|
Volume Range
0.8 -1.0 ml |
Reference ranges
Refer to printed result report.
Laboratory Site
Old Dalkeith Road
Edinburgh
EH16 4SA
Transport arrangements
Inter-site van shuttle service, GP van service, External hospital van service, Couriers, Hospital porter collection (refer to collection times posted in wards / departments), Hospital Pneumatic Tube System (PTS)
Sample storage arrangements
Specimen transport arrangements must be in accordance with current postal and transport regulations. Samples should be transported to the laboratory without delay. If processing is delayed, store at room temperature (19-23 oC). Patient samples can be transported at ambient temperature.
Special instructions for collection
To order tubes via PECOS the product number is 622222.
Gently invert each tube 10 times. Samples should reach laboratory within 16 hours of being taken. Alternatively, samples should be incubated upright at 37oC +- 1 for 16-24 hours. After incubation, samples may be held between 4 and 27oC for up to 3 days prior to centrifugation.
Clinical samples must be collected into leak-proof containers and placed into a sealed bag with absorbent material. Patient samples must be individually packaged and not mixed with other patient samples. Any appropriate hazard labelling should be clearly visible on the sample bag / sample.
How to request
Use appropriate request form or TRAK. Forms must be fully completed with Patient Identifier Number (CHI), Forename, Surname, Date of Birth, Gender and Location of patient (hospital and ward or primary care centre).
Availability
Weekdays for receipt of specimens 08.30 – 19.00 and Saturday 09.00 – 14.00.
Anticipated turnaround
10 days
What happens if the result is positive or abnormal
Positive results are notified to the TB Bacteriologist and are available in the patient’s records.
Static information/disclaimer
False negative results may occur for a variety of reasons including: inappropriate timing of sample collection, inappropriate sample type, inappropriate sample storage and incorrect volume of blood ine each Quantiferon collection tube. New and emerging variants may also occur which may not be detected by specific assays. Towards the limit of detection of an assay sampling variation will result in lower reproducibility. Haemolysed or lipaemic samples can also cause interference with assay results.
General additional information
Only indicated for diagnosis of latent TB infection.