Correct Answer: D

Rationale: The correct answer is D. A red, warm, swollen calf may indicate a deep vein thrombosis, which is a medical emergency. This finding requires immediate notification of the primary health care provider to prevent potential complications such as pulmonary embolism. Choices A, B, and C are not indicative of life-threatening conditions and should be monitored but do not require immediate notification like a suspected deep vein thrombosis.

Correct Answer: C

Rationale: The correct answer is C: 'Back pain.' Back pain is a common symptom of spinal cord compression in cancer patients. This condition can cause localized or radiating back pain due to the compression of the spinal cord or nerves. While symptoms such as decreased deep tendon reflexes, severe headache, and loss of bladder control can occur in other conditions, back pain is specifically associated with spinal cord compression in cancer patients.

Correct Answer: A

Rationale: The correct answer is A: Vital signs. Monitoring vital signs is crucial during the infusion of monoclonal antibody therapy as there is a risk of infusion reactions such as fevers, chills, hypotension, and tachycardia. Assessing vital signs allows for early detection of any adverse reactions, enabling prompt intervention. Skin reactions (choice B), respiratory status (choice C), and renal function (choice D) are important assessments in general patient care but are not the priority during the infusion of monoclonal antibody therapy.

Correct Answer: C

Rationale: The correct answer is C. A BUN level of 18 mg/dL is within the normal range; however, since cisplatin is nephrotoxic, it requires close monitoring. Elevated BUN levels can indicate impaired kidney function. Choices A, B, and D are within normal ranges and do not directly relate to cisplatin therapy or require immediate intervention.

Correct Answer: A

Rationale: The correct answer is A: The client's pain rating. Pain assessment should primarily rely on the client's self-report for the most accurate determination of pain intensity. Nonverbal cues from the client (choice B) can provide additional information but should not replace the client's self-report. The nurse's impression of the client's pain (choice C) may be subjective and less reliable than the client's self-assessment. Pain relief after appropriate nursing intervention (choice D) is an important outcome but does not replace the initial assessment of the client's pain.