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| CANTERBURY HEALTH LABORATORIES |
Colours indicate cap colour of collection tube
| 4° C | 30° C | |||||||
| EDTA | Heparin | Serum | Fluoride | EDTA | Heparin | Serum | Fluoride | |
| ACTH | 18 | NT | 3 | NT | 8 | NT | 1 | NT |
| Aldosterone | >120 | >120 | >120 | >120 | 14 | 13 | 16 | 15 |
| a subunit total | >120 | >120 | >120 | >120 | >120 | >120 | >120 | >120 |
| a subunit free | >120 | >120 | >120 | >120 | 60 | >120 | 86 | 96 |
| AVP | >120 | >120 | >120 | >120 | 96 | 28 | 28 | 39 |
| CRH | >120 | 100 | 50 | >120 | 18 | 14 | 11 | 15 |
| C-Peptide | >120 | >120 | >120 | >120 | >120 | >120 | >120 | >120 |
| FSH | >120 | >120 | >120 | >120 | >120 | >120 | >120 | >120 |
| Glucagon | >120 | 74 | 34 | >120 | 69 | 42 | 30 | 114 |
| GH | >120 | >120 | >120 | >120 | 62 | 64 | 66 | 61 |
| IGF-1 | >120 | 114 | >120 | >120 | >120 | >120 | >120 | 88 |
| IGF-BP3 | >120 | NT | NT | NT | >120 | NT | NT | NT |
| Insulin | >120 | >120 | >120 | >120 | 31 | 21 | 32 | 10 |
| Leptin | >120 | >120 | >120 | >120 | >120 | 69 | >120 | 60 |
| LH | >120 | >120 | >120 | >120 | >120 | 59 | 82 | 88 |
| PPP | >120 | >120 | >120 | >120 | >120 | 53 | 64 | 67 |
| PTH | >120 | 101 | 55 | >120 | 36 | 33 | 3 | 16 |
| Prolactin | >120 | >120 | >120 | >120 | 109 | >120 | 84 | 87 |
| VIP | >>120 | >120 | >120 | >120 | 25 | 13 | 20 | 20 |
"NT" = not tested, ">" = stable for at least the time period shown
Pro-BNP (Roche Elecsys): the duration of stability in plasma at 2-8o is given by the manufacturer as 72 hours. Our preliminary results suggest that this also the case at room temperature and for whole blood. This is our clinical "BNP" assay.
Research BNP assays: duration of stability of BNP (by RIA) and NT-BNP when stored as whole blood or plasma at room temperature (hours).
| Plasma | Whole Blood | |||
| EDTA | Heparin | EDTA | Heparin | |
| BNP | 18 | 10 | 20 | |
| NT-BNP | 7 | 8 | 5 | 4 |