A patient, diagnosed with chronic renal failure, is admitted with hypermagnesemia. Which of the following history data would contribute to this electrolyte imbalance?
1. ingestion of magnesium-containing antacids for epigastric reflux for 3 weeks
2. reduced intake of caffeine-containing fluids
3. recovering from nasal congestion
4. sprained wrist one week ago while carrying heavy groceries up stairs
1
Rationale: The patient has chronic renal failure. Even though this abnormality is rare, it can occur with diminished renal excretion as seen in renal dysfunction, or excessive magnesium intake. Consumption of large quantities of magnesium-containing antacids or laxatives can be a source of excessive intake. The history data of ingestion of magnesium-containing antacids for epigastric reflux for 3 weeks is most likely what contributed to this electrolyte imbalance in the patient. The other history data would not have contributed to this imbalance.
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