Question

Your adult trauma patient may be experiencing the adverse effects of a crush injury that triggered the sudden release of high levels of histamine. What would this usually cause?

A. Bronchoconstriction and vasodilation

B. Irregular, shallow respirations and a normotensive blood pressure

C. Increased spontaneous respiration and unequal blood pressure readings in arms and legs

D. Bronchodilation and vasoconstriction

Answer 1

A sudden release of high levels of histamine in a trauma patient usually causes vasodilation and bronchoconstriction, resulting in anaphylactic shock that can be life-threatening without prompt treatment with epinephrine.

Step-by-step explanation:

If a trauma patient is experiencing the sudden release of high levels of histamine, this typically leads to a potent systemic reaction, which can include vasodilation and bronchoconstriction. In such situations, a patient would likely suffer from respiratory distress and a steep decline in blood pressure, which are classic symptoms of anaphylactic shock. This life-threatening condition requires immediate treatment with epinephrine, as it counteracts these effects by increasing blood pressure and relaxing the bronchial smooth muscle.