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Archive for the 'ACID/BAse and Electrolytes' Category

POTASSIUM BALANCE

Thursday, February 3rd, 2011

How is potassium (K+) distributed between the intracellular fluid (ICF) and ECF compartments? A 70-kg man contains approximately 3500 mEq of K+ (approximately 50 mEq/kg body weight). The vast majority of this (98%) is in the ICF space. Therefore, the amount in the ECF compartment (the portion that we routinely measure) represents only a small […]

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REGULATION OF SODIUM, WATER, AND VOLUME STATUS

Monday, January 31st, 2011

How do you estimate a patient’s serum osmolality? A close estimate can be derived from measurements of the serum sodium (Na+), glucose, and blood urea nitrogen (BUN), using the following equation: What percentage of the adult human body consists of water? What percentage of the water content is intracellular versus extracellular? Approximately 60% of the […]

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