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| Tube Cap Colour | Tube Type | Related Test | Remarks |
|---|---|---|---|
 | EDTA 2.7 or 3 ml | Full Blood Count, ESR, RBC Folate, HbAlc, Sickle Cell (Hb Electrophoresis), Cyclosporin, Tacrolimus, PTH Transfusion: Group and Screen: Lymphocyte Markers, CD4 Microbiology: Viral & Bacterial PCR viral load | Mix by inversion 3 to 4 times |
 | Sodium Citrate 2.7 or 3 ml | D-Dimer, APTT, INR, coagulation studies | Fill to frosted minimum fill line. Mix by inversion 8 to 10 times |
 | Serum | Sodium, Potassium, Urea, Creatinine, Chloride, Bicarbonate, CRP, Bilirubin, ALT, ALP, GGT, Total Protein, Albumin, Calcium, Phosphate, Magnesium, CK, Urate, Amylase, Cholesterol, Triglyceride, Paracetamol, Salicylate, Anticonvulsants, Digoxin, Ethanol, TSH, fT4, fT3. Troponin, FSH, LH, Testosterone, Oestradiol, Progesterone, Prolactin, Cortisol, Growth Hormone, IGF1, Tumour Markers, Iron Studies, Ferritin, B12, Folate, EP0, Haptoglobin, Glandular Fever | Mix by inversion 5 to 6 times |
 | Fluoride Oxalate 2.7 or 3 ml | Glucose, Lactate | Mix by inversion 8 to 10 times |
For other tests not mentioned in this guide, please call the laboratory
NOTE: BD tubes require immediate mixing following collection. Insufficient mixing can result in inaccurate test results and the need to re-draw. The correct mixing technique is to gently invert each tube the recommended number of times shown above.