Measurement Of Body Fluid Compartments

A known amount of a substance the indicator which should be confined to the compartment of interest is administered. The two main fluid compartments are the intracellular and extracellular compartments. The indicator dilution method can be used to determine the size of body fluid compartments see chapter 14.
measurement of body fluid compartments

Body Fluid Compartments Daily Water Intake And

Physiology Figure Body Fluid Compartments Of A 70 Kg Adult

Body Fluids Renal Physiology Physiology 5th Ed

Measurement of fluid volumes in the different body fluid compartmentsthe indicator dilution principle.

Measurement of body fluid compartments. The volume of the plasma is around 3 litres in an average person but the average blood volume is 4 6 litres. Unfortunately some bromine 82 also distributes into the cells. 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. Thus bromine measurements of the ecf volume frequently over estimate the ecf volume.

Plasma is 3 litres. Describe the body fluid compartments and explain the methods used for measurement of body fluid volumes. The intracellular fluid icf compartment is the system that includes all fluid enclosed in cells by their plasma membranes. Body fluids can be discussed in terms of their specific fluid compartment a location that is largely separate from another compartment by some form of a physical barrier.

Body fluid compartments and measurement general physiology duration. 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. The human body and even its individual body fluids may be conceptually divided into various fluid compartments which although not literally anatomic compartments do represent a real division in terms of how portions of the bodys water solutes and suspended elements are segregated. After allowing sufficient time for uniform distribution of the indicator throughout the compartment a plasma sample is collected.

The volume of a fluid compartment in the body can be measured by placing an indicator substance in the compartment allowing it to disperse evenly through out the compartments fluid and then analyzing the extent to which the substance becomes diluted. Ecf is further divided into interstitial extravascular and bloodplasma intravascular compartments. Measuring the extracellular fluid volume with crystalloid tracer. The body fluid compartments in the body can be divided into.

Determination of cardiac output ficks principle dye dilution method to assess. Composition of fluid intra and extracellular. Physiology open 1205 views. Average 70 kg adult human 42 liters 60 of total body weight icf contains 28l ecf contains 14 l.

Interstitial fluid is 11 litres. Total body water. How to measure the fluid volume intra and extra cellular total body water constitutes in men about 60 of body weight in women 50 is divided into icf and ecf. If you measure too soon all you will get is the volume of the functional extracellular fluid.