Correct Answer: B

Rationale: The correct answer is B: Tyramine. When individuals taking monoamine oxidase inhibitors (MAOIs) consume foods high in tyramine, it can lead to a potentially dangerous increase in blood pressure known as a hypertensive crisis. Foods high in tyramine include aged cheeses, cured meats, and certain fermented foods. Choices A, C, and D are incorrect. Folate, potassium, and vitamin K are not typically contraindicated with the use of MAOIs.

Correct Answer: C

Rationale: Ambulance exchange points are established when threats to air resources prevent evacuation by air from forward units. These points serve as locations where patients can be transferred between ground and air ambulances. Area support medical battalions (Choice A) refer to medical units that provide medical support to large areas and are not specifically related to evacuation. TOE units (Choice B) and field hospitals (Choice D) are not typically established in response to threats to air resources affecting evacuation.

Correct Answer: D

Rationale: In situations where a client is unable to sign the consent form, obtaining a telephone consent from a family member, with the consent being witnessed by two healthcare providers, is the best course of action. This ensures that the client's best interests are considered and that proper authorization is obtained. Option A, obtaining a court order, is not necessary in this scenario and could delay the surgery. Option B, signing the consent on behalf of the client, is not appropriate as it may raise ethical and legal concerns. Option C, sending the client to surgery without a signed consent form, is not advisable as it violates the principles of informed consent and places the client at risk.

Correct Answer: D

Rationale: The correct answer is D, Hypokalemia. Diuretics commonly lead to hypokalemia, which is low potassium levels in the body. Hyperkalemia (choice A) is the opposite, indicating high potassium levels. Hypercalcemia (choice B) refers to elevated calcium levels, not typically associated with diuretics. Hypomagnesemia (choice C) is low magnesium levels and can also be a consequence of diuretic use, but potassium imbalance is more common.

Correct Answer: B

Rationale: An apical rate of 140 bpm is within the normal range for a newborn. Digoxin is commonly used to treat heart failure by increasing the strength and efficiency of the heart's contractions. Since the heart rate is within the normal range, there is no need to hold the medication or notify the healthcare provider. Rechecking the apical rate in an hour is unnecessary as the heart rate is not alarming. Therefore, the appropriate nursing action is to administer the digoxin.