Purpose: To use the standing blood order of equation of Nuttall et al for preoperative ordering of blood in surgical patients.			Citations with documentation. 05.01.07	Sriram & Svirbely 2000
conversion	enter
hemoglobin in g/L		g/L equals	0	g/dL
data	enter
Are you ordering blood products for a patient about to undergo surgery? (Y or N)		:-):-):-)
usual number of packed red blood cells used during the operation		units
patient's current hemoglobin in g/dL		g/dL
minimum hemoglobin in g/dL acceptable for the patient		g/dL
calculate	result
data complete?	Yes
evaluation appropriate?	Yes	:-):-):-)
expected hemoglobin following the operation without transfusion	10	g/dL
value for the standing blood order equation	-1.0
The preoperative blood order should be:	type and screen only