| Hemolyzed sample |
Presence of pink to red tinge in serum plasma |
| Insufficient sample |
Serum obtained not enough for requested tests |
| Incorrect sample tube |
Most samples received should not be in anticoagulated tubes |
| Sample not on ice |
Samples for arterial blood gases analysis not transported on ice |
| Incorrect sample identification |
Mismatch between name on sample and request form |
| Tube broken in centrifuge |
The use of different tube sizes for sample collection |
| Delay in sample transportation |
Samples were not sent to the laboratory on time |
| Expired reagents |
Some reagents expired before use |
| Sample mix-ups |
Samples intended for other laboratories were sent to the biochemistry laboratory |
