Correct Answer: B

Rationale: Shortness of breath is a critical sign that can indicate heart failure or pulmonary edema, conditions that require immediate intervention in a client with a suspected myocardial infarction. Chest pain radiating to the left arm is a classic symptom of a myocardial infarction but may not necessitate immediate intervention compared to severe shortness of breath. Nausea and vomiting can be present in myocardial infarction but are not as urgent as shortness of breath. Diaphoresis, or sweating, is a common symptom of a myocardial infarction but may not be as immediately concerning as significant shortness of breath.

Correct Answer: A

Rationale: Muscle weakness and cramps are characteristic signs of hypokalemia, a condition marked by low levels of potassium in the blood. Potassium is essential for proper muscle function, and its deficiency can lead to muscle weakness and cramps. In the context of a client with a nasogastric tube to low intermittent suction, the loss of potassium through suctioning can contribute to the development of hypokalemia. Nausea and vomiting (choice B) are more commonly associated with gastrointestinal issues rather than hypokalemia. Constipation (choice C) is not a typical finding of hypokalemia; instead, it can be a sign of other gastrointestinal problems. Increased blood pressure (choice D) is not a direct manifestation of hypokalemia; in fact, low potassium levels are more commonly associated with decreased blood pressure.

Correct Answer: D

Rationale: The correct answer is to assign the client to a negative air-flow room (Choice D). Active tuberculosis requires implementation of airborne precautions, including isolating the client in a negative pressure air-flow room to prevent the spread of the infection to others. Choice A (Wear a gown and gloves) is important for standard precautions but does not address the specific airborne precautions needed for tuberculosis. Choice B (Have the client wear a mask) may help reduce the spread of respiratory droplets but does not provide adequate protection for healthcare workers or other patients. Choice C (Perform hand hygiene) is essential for infection control but is not the most critical action when dealing with an airborne infection like tuberculosis.

Correct Answer: C

Rationale: Verifying the blood type and Rh factor with another healthcare professional is the most crucial action to prevent a transfusion reaction. Ensuring compatibility between the donor blood and the recipient is essential in preventing adverse reactions such as hemolytic transfusion reactions. Checking vital signs is important for monitoring the client during the transfusion process but does not directly prevent a transfusion reaction. Using a blood filter can help remove clots and debris but does not address the risk of a reaction due to blood type incompatibility. Administering antihistamines before the transfusion is not a standard practice to prevent transfusion reactions related to blood type incompatibility.

Correct Answer: B

Rationale: Shortness of breath is a critical sign that can indicate heart failure or pulmonary edema, conditions that require immediate intervention in a client with a suspected myocardial infarction. Chest pain radiating to the left arm is a classic symptom of a myocardial infarction but may not necessitate immediate intervention compared to severe shortness of breath. Nausea and vomiting can be present in myocardial infarction but are not as urgent as shortness of breath. Diaphoresis, or sweating, is a common symptom of a myocardial infarction but may not be as immediately concerning as significant shortness of breath.