Correct Answer: D

Rationale: The correct answer is to trim toenails straight across. This instruction is crucial for clients with diabetes to prevent ingrown toenails, which can lead to infection. Soaking feet in warm water daily can increase the risk of skin breakdown. Cotton socks are recommended, but the priority in foot care for diabetes is proper nail trimming. Using a heating pad can also pose a burn risk for individuals with reduced sensation in their feet.

Correct Answer: C

Rationale: The correct answer is to monitor digoxin levels in a patient on digoxin. Digoxin is a medication commonly used to treat heart conditions, and monitoring its levels in the blood is crucial to ensure that the patient is within the therapeutic range and to prevent toxicity. Monitoring potassium levels (Choice A) is important due to the potential of digoxin-induced hypokalemia, but the primary focus should be on monitoring digoxin levels. Monitoring calcium levels (Choice B) and sodium levels (Choice D) are not directly related to digoxin therapy and are not the primary lab values of concern when administering digoxin.

Correct Answer: A

Rationale: The correct answer is to 'Assess the patient for injuries' when a patient experiences a fall. This is crucial to promptly identify any injuries and provide appropriate care. Calling for help may be necessary, but assessing the patient's condition takes precedence to ensure immediate attention to any injuries. Documenting the fall and notifying the healthcare provider would follow after the initial assessment and necessary actions have been taken.

Correct Answer: C

Rationale: Auscultating crackles in the lung bases indicates fluid in the lungs, which can be a sign of aspiration pneumonia or pulmonary edema and requires immediate intervention to prevent respiratory distress. Aspirating 100 mL of gastric residual is within the acceptable range and does not require immediate intervention. A gastric pH of 4 is normal for gastric contents. Checking residual every 6 hours is a routine nursing intervention and does not indicate an urgent issue like pulmonary complications.

Correct Answer: B

Rationale: The correct answer is B: Tachycardia. Tachycardia can indicate a hemolytic transfusion reaction, a severe and life-threatening complication of blood transfusion. The nurse should report tachycardia immediately to prevent further complications. Low back pain, flushed skin, and headache are also important to monitor during a blood transfusion, but they are not as indicative of a severe transfusion reaction as tachycardia.