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 for correct choices:

• A change in mood: Isotretinoin is associated with serious neuropsychiatric side effects, including depression, mood swings, and suicidal ideation. Adolescents are particularly vulnerable, and any mood changes should be reported immediately to prevent potential harm.
• Decreased night vision: Isotretinoin can cause visual disturbances, including impaired night vision, which may develop suddenly and without warning. This adverse effect can pose safety risks, especially when driving or navigating in low-light conditions, and requires prompt provider evaluation.

Rationale for incorrect choices:

• Dry mouth: Dry mucous membranes are a common and expected side effect of isotretinoin due to its drying effects on the skin and mucosa. While it may cause discomfort, it is not typically urgent or dangerous unless accompanied by other systemic symptoms.
• The development of dry eyes: Dry eyes are a frequent and expected adverse effect of isotretinoin. This symptom can usually be managed with artificial tears or lubricating eye drops and does not require immediate provider notification unless severe or worsening.
• Sunburn: Isotretinoin increases photosensitivity, making clients more prone to sunburn. However, this is a manageable and anticipated side effect. The client should be advised to use sunscreen and protective clothing rather than treat it as an emergency.
• Engagement in sexual activity: Sexual activity becomes relevant only if pregnancy is a risk, due to isotretinoin’s severe teratogenicity. Since the client currently tests negative on hCG and is not sexually active, it is not a priority concern unless that status changes.
• Worsening of acne: A temporary worsening of acne, known as an initial flare, is common in the first few weeks of isotretinoin therapy. It is not considered dangerous and does not warrant immediate discontinuation or urgent evaluation unless accompanied by severe systemic symptoms.