| Field code | QU4 |
| Field description | Fourth product quantity per tube (see also NBTx) |
| Field type | Numeric Length: 4 |
| Field rule | In millilitres |
| Dictionary field | Blood sample requirements (amount) (The amount (volume) of peripheral blood samples) |
| EMDIS messages |
SMP_REQ |
| WMDA XML fields related to dictionary field |