Chapter 9

Pharmacokinetics

Tissue water volumes, flow rates, and perfusion rates for the "standard" 69.4-kg man

 

 

Compartment

 

Tissue

H2O volume

(l)

Blood flow

(ml/min)

Perfusion rate (ml/min/ml H2O)

Residence time

(min)

 

Source

Central

= 11.56 l

Lungs

0.37

5,000

13.33

0.07

a

 

Kidneys

0.21

1,100

5.14

0.19

a

 

Blood

2.84

5,000

1.76

0.57

a

 

Brain

1.03

700

0.68

1.47

a

 

Heart, spleen

1.18

350

0.29

3.37

a

 

Bone

2.44

250

0.10

10.00

a

 

Skin

3.49

300

0.085

11.63

a

Muscle

Fat

3.76

200

0.053

18.80

a

= 25.76 l

Muscle

22.0

750

0.034

29.33

a

Gastrointestinal tract = 2.4 l

Stomach/intestine

2.40

900

0.375

2.67

a,b

Liver

= 1.08 l

Liver

1.08

1,350

1.25

0.80

a,c

 

Total body water content is 40.8 l.

 

aAdapted from M. Rowland, T. N. Tozer, & R. Rowland, Clinical Pharmacokinetics: Concepts and Applications, copyright 1995, with permission of Lippincott Williams & Wilkins.

 

bAdapted from R. F. Derr, Simulation studies on ethanol metabolism in different human populations with a physiological pharmacokinetic model, Journal of Pharmaceutical Sciences 82(7), pp. 677-682, copyright 1993, with permission of John Wiley & Sons.

 

cAdapted from O. A. Larsen, K. Winkler, & N. Tygstrup, "Extra" plasma in the liver calculated from hepatic hematocrit in patients with portacaval anastomosis, Clinical Science 25(3), pp. 357-360, copyright 1963, with permission of Portland Press Ltd.

 

 

 

 

 

Back to Chapter 9