Body measurements

Body fluid compartments overview. 20150921 fluid compartments regulation of ecf volume fluid replacement. Duke renal physiology 23817 views. The formula for calculating synovial fluid joint volume in the lavaged joints regardless of effusion is a modification of the albumin dilution method 2 which uses the measurement of a native molecule before and after dilution with a known amount of saline. Volume measurement of compartments. Previous electrical impedance studies that predict body fluid volume and body fat used a single measurement site between the wrist and ankle calculations based on an electrical model of the thorax suggest that with a single wrist to ankle measurement only the electrical characteristics of the legs and arms will contribute significantly to a prediction of the total body fluid volume.

The plasma volume is calculated by evans blue technique the proportion of plasma and hematocrit is by centrifugation. Schoeller da van santen e peterson dw dietz w jaspan j klein pd. If plasma is x and its volume in body is y then plasmahematocrit100 the volume in body is v. Extracellular fluid volume measurement. If the tracer is metabolised a series of measurements can be made and assuming exponential decline first order kinetics the volume of distribution can be determined by extrapolation back to zero time. Not interfere with body fluid distribution if the tracer is excreted in the urine then the loss can be determined and corrections made in the calculation.

Then make proportion calculation. Am j clin nutr 1980 33122686 2693. My source for most of this information has been the kerry brandis anaesthetic viva book. Total body water measurement in humans with 18o and 2h labeled water. Everyone should have one. Previous electrical impedance studies that predict body fluid volume and body fat used a single measurement site between the wrist and ankle calculations based on an electrical model of the thorax suggest that with a single wrist to ankle measurement only the electrical characteristics of the legs and arms will contribute significantly to a prediction of the total body fluid volume.