A condition of diluted blood sodium levels (

Question

A condition of diluted blood sodium levels (<125 mmol/L) that can occur from excessive water intake is known as:

BlackTom AI · Accepted Answer

In this question, we’re asked to identify the electrolyte disturbance associated with very low blood sodium levels caused by excessive water intake.
Option 1: Hypernatremia would mean an abnormally high sodium concentration in the blood, which occurs with dehydration or water loss, not with overhydration. This choice is therefore incorrect for a dilution scenario.
Option 2: Hyperkalemia refers to elevated potassium levels, not sodium. Since the stem focuses on sodium concentration, this option does not fit the described condition and should be dismissed.
Option 3: Hyponatremia denotes a decreased serum sodium concentration, which can result from drinking an excessive amount of water diluting sodium in the bloodstream. This aligns precisely with the scenario described in the question.
Option 4: Dehydration implies a fluid deficit and typically leads to concentrated, not diluted, blood constituents, including higher sodium levels relative to water. This contradicts the condition of diluted blood sodium levels due to overhydration.
To summarize the reasoning: the stem points to low sodium from overdrinking water (a dilutional effect), which matches the concept of hyponatremia, while the other options describe different electrolyte or fluid status disorders that do not fit the given scenario.

KNHES 5416 AU2025 (13351) Exam 2

A condition of diluted blood sodium levels (<125 mmol/L) that can occur from excessive water intake is known as:

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