A nurse is calculating the BMI of a client who has a weight of 75 kg (165.3 lb) and a height of 1.8 m (5 ft 9 in). Which of the following values should the nurse calculate as the client's BMI?

Rationale:

A. Obtain a 12-lead ECG for the client: An ECG is important for diagnosing myocardial ischemia or infarction, but it is not the immediate first step. The priority is to stop activity and reduce myocardial oxygen demand before further diagnostics.

B. Have the client stop walking and sit down: Angina is often triggered by physical exertion. Stopping activity and sitting down reduces oxygen demand on the heart, alleviates symptoms, and prevents further ischemia. This is the most immediate and essential first action.

C. Administer sublingual nitroglycerin to the client: Nitroglycerin helps relieve anginal pain by dilating coronary arteries, but it should be given after the client has stopped activity and rested. Administering it while the client is still active may not be effective or safe.

D. Measure the client's vital signs: While vital signs are important for assessing the client’s current status, the priority is to stop exertion, which is likely contributing to myocardial oxygen imbalance. Assessment follows immediate symptom relief measures.

Rationale:

A. "This helps to keep you hydrated.": Flushing an intermittent infusion device does not hydrate the client, as the small amount of saline used is not intended for fluid replacement. Hydration is achieved through continuous or scheduled fluid administration, not flushes.

B. "This clears blood from the tubing and the catheter.": Flushing helps maintain catheter patency by preventing blood from clotting inside the lumen. It ensures the device remains functional and ready for medication administration when needed.

C. "This makes sure it stays sterile.": Flushing does not sterilize the device. Sterility is maintained through proper handling and use of aseptic technique. The purpose of flushing is mechanical, not antimicrobial.

D. "This prevents leakage of fluid and medication.": While flushing may help confirm that the device is intact, the primary reason is not to prevent leakage but to maintain patency and ensure the catheter is free of occlusions.