Which patient condition might contraindicate the use of glucagon?

Prepare for the EMT National Registry Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

The condition that contraindicates the use of glucagon is a history of pheochromocytoma. Pheochromocytoma is a rare tumor of the adrenal glands that leads to excess production of catecholamines, such as adrenaline. When glucagon is administered, it can stimulate the secretion of these catecholamines, potentially leading to a dangerous hypertensive crisis due to the body's exaggerated response.

In emergency medical situations, it’s crucial to avoid medications that can exacerbate a patient's underlying conditions, especially those affecting the cardiovascular system. In the case of a patient with a history of pheochromocytoma, using glucagon could provoke significant complications due to the abnormal hormonal responses caused by the tumor.

The other conditions listed, such as acute renal failure, advanced age, and chronic fatigue syndrome, are not direct contraindications for glucagon administration and typically would not lead to the same severe adverse effects that arise from glucagon's interaction with catecholamine production in pheochromocytoma.

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