Min.10 ml Max.2 litres. For optimal results 50ml is required. All bloodstained fluid heparinized at 5 units/ml
Requires own tube?:
Internal Spec Code:
All effusions are collected in screw capped containers, to avoid spillage during transit and must be heparinized at the rate of 5 units/ml. Fluids should reach the laboratory not later than 1600 hours during the working week as the preparation time is very lengthy. If effusions are tapped at other times they may be stored in the refrigerator for up to 48 hours without damage to cellular morphology. Cytological analysis requires at least 10ml of fluid and preferably the maximum volume available - up to 2 litres. Do not discard fluid if cytological analysis is required, send as much as possible to the laboratory. In some cases of a long standing effusion the cytological analysis may yield inconclusive results due to degenerative and inflammatory changes to the cells. In these cases a second tap will often yield far better diagnostic material.