Compound sodium lactate (Hartmann's) solution. Caution: risk of clotting

We have observed blood clotting in blood administration sets where Hartmann's solution (Travenol) has preceded blood transfusion. This is due to calcium ions (Ca++) contained in the Hartmann's solution and is more likely to occur at 37 degrees C. We suggest that this potential hazard be more widely realised and that the practice cease.