How would you calculate the total blood volume of the body, without exsanguination?
Inject a solution of known volume into the blood. Allow this to circulate for an appropriate length of time, e.g. 5-10 mins, then take a blood sample. The dilution of the initial solution can then be calculated by measuring the concentration in the sample.Say 1M of solution is injected, and a 10ml blood sample taken after the wait period with concentration of 2 x 10-3 . Volume = concentration/moles therefore volume = 1/(2 x 10-3) = 5000ml.
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Answered by Charlotte F. • Medical School Preparation tutor
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