A nurse teaches a group of other nurses about the safety issues associated with bulimia. Which statement by a learner indicates an adequate understanding of the most significant safety risk associated with bulimia?

Choice A rationale Recurrent self induced vomiting causes significant loss of water and essential electrolytes, such as potassium and chloride. Normal serum potassium is 3.5 to 5.0 mEq/L. Depletion leads to severe dehydration and hypotension, which can cause cardiovascular collapse or lethal cardiac arrhythmias. Because these physiological shifts can be rapidly fatal, they represent the most significant safety risk. Maintaining hemodynamic stability and electrolyte balance is always the priority in medical management of bulimia. Choice B rationale Callouses on the knuckles, known as Russell sign, are a physical indicator of repeated self induced vomiting due to friction against the teeth. While this is a helpful diagnostic sign for identifying purging behavior, it is not a safety risk in itself. It serves as a clinical marker rather than a life threatening complication. Education should focus on the internal physiological consequences that pose an immediate danger to the patient's life and cardiac function. Choice C rationale Frequent exposure to gastric acid during vomiting leads to the erosion of dental enamel, particularly on the lingual surfaces of the teeth. While this causes permanent dental damage, increased sensitivity, and potential tooth loss, it is not acutely life threatening. In the hierarchy of safety risks, musculoskeletal or cosmetic damage ranks lower than the systemic cardiovascular and fluid volume deficits that occur with purging, which require more urgent nursing monitoring and intervention. Choice D rationale Chronic laxative abuse can lead to gastrointestinal dependency, metabolic acidosis, and skin irritation due to frequent diarrhea. While skin breakdown is a nursing concern regarding integrity, it does not carry the same level of mortality risk as the acute electrolyte imbalances associated with vomiting. Safety education must prioritize the risks that lead to organ failure or death. Dehydration and hypotension from purging remain the most critical systemic threats to patient safety.