Se propone una fórmula sencilla, derivada matemáticamente, con el objeto de calcular las pérdidas sanguíneas permisibles. En muchos modelos encontrados en la literatura médica dichas aproximaciones son lineales, lo cual induce un error importante en la predicción. En este modelo se propone, se deduce y se explica una aproximación exponencial considerada mucho más cercana a la realidad. Se valora el proceso de hemodilución observado cuando un paciente pierde sangre, mientras se le infunden líquidos intravenosos, manteniendo la volemia aproximadamente constante.
This article proposes a simple, mathematically-derived formula which could be used for calculating allowable blood loss. Authors have used lineal approaches in many models found in the medical literature; this introduces an important inaccuracy into such prediction. An exponential approach is deduced and explained in the model proposed here which is considered to be much closer to reality than that obtained with the lineal model. More emphasis is placed on the fact that while a patient is losing blood, he/she is simultaneously receiving fluids to keep total blood volume almost constant.