Improvement to allowable blood loss formula
The allowable blood loss formula doesn't address adjustments for obese patients, who may have a blood volume of 40 ml/kg or lower. It would be wonderful if the MedCalc formula incorporated the results of "Estimating Blood Volume in Obese and Morbidly Obese Patients," Lemmens et al Obesity Surgery 2006 Jun;16(6):773-6. (http://www.ncbi.nlm.nih.gov/pubmed?term=estimating%20blood%20volume%20in%20obese%20and%20morbidly%20obese%20patients)
Thank you for making and maintaining MedCalc - it is a fantastic, easy-to-use resource for practice and teaching!
Jessica Miller, MD
shared this idea
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Thanks for this suggestion, this is actually a very elegant formula. From the mathematical derivation it seems this formula can be used for any adult patient, regardless of their weight, instead of the 75 or 65ml/kg. However they always talk about obese patients. Can you tell me if the formula is used for all patients or only for patients over a given BMI?
