IONS-ICF vs. ECF

SUMMARY

1. Total body Na exceeds total body K

2. 70% of total body sodium is in a readily exchangeable state (~3000 mmol)

3. 90% of total body potassium is in a readily exchangeable state (~3000 mmol)

4. Serum osmolality is ~300 mosm/L

5. pH of ECF is 7.35-7.45

Reference(s)

Barrett, K.E., Barman, S.M., Brooks, H.L., X, J. and Ganong, W.F. (2019). Ganong’s review of medical physiology. 26th ed. New York: Mcgraw-Hill Education