Method of Feldschuh and Enson for Estimating Blood Volume in an Adult Based on Body Habitus

Description

Feldschuh and Enson estimated blood volume for adults based on the body habitus. This can be helpful when the body weight significantly deviates from the ideal. The authors are from Columbia University.

Patient selection: adult

Parameters:

(1) gender

(2) height in cm

(3) weight in kilograms

(4) ideal body weight in kilograms

(5) body surface area in square meters

Parameter	Gender	Blood Volume in Liters (Figure 2, pg 607)
height in cm	female	(0.046 * (height)) - 2.817
height in cm	male	(0.041 * (height)) - 1.892
body weight in kg	female	(0.033 * (weight)) + 1.728
body weight in kg	male	(0.024 * (weight)) + 3.425
BSA in sq meter	female	(3.187 * (BSA)) - 1.381
BSA in sq meter	male	(2.566 * (BSA)) + 0.391

percent deviation of body weight from desirable weight =

= ((actual weight) - (desirable weight)) / (desirable weight) * 100

From Figure 1 (page 608) the optimum factor for blood volume in mL per kg body weight can be estimated (from -40% to +200%).

Percent Deviation	Factor for Blood Volume as mL per kg
-40 to + 40%	(0.00523 * ((percent desirable)^2)) - (0.5495 * (percent desirable)) + 69.51
+40 to +200%	(0.000511 * ((percent desirable)^2)) - (0.2076 * (percent desirable)) + 63.08

blood volume in mL =

= (actual body weight in kilograms) * (factors for blood volume)

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