A nurse educator is teaching a group of patients about prevention of sickle cell crises. What should the nurse instruct about the precipitating factors that could contribute to a sickle cell crisis? Select all that apply.

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B) High altitudes can lead to decreased oxygen levels in the blood, which can precipitate a sickle cell crisis by causing the sickle-shaped cells to clump together more easily.C) Fever can increase the body's metabolic rate and oxygen demand, potentially leading to hypoxia and triggering a sickle cell crisis.D) Vomiting can lead to dehydration, which can increase blood viscosity and the likelihood of sickle cells sticking together, potentially causing a crisis.

A Nurse Educator Is Teaching a Group of Patients About