Stahl et al developed several equations for estimating peri-operative blood loss. One estimates intra-operative blood loss. The authors are from Masschusetts General Hospital, Klinikum Essen-Mitte and Beth Israel Deaconess Medical Centre.
Patient selection: surgical patient
Assumption: blood in suction container is only intra-operative blood loss
Parameters:
(1) volume in suction containers in liters
(2) hemoglobin concentration of the fluid in the suction container in g/dL
If more than one suction container is present then either (a) the fluid needs to be combined and sampled or (b) the blood loss represented by each container must be added up for a total. The presence of a blood clot also needs to be taken into account.
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