Which of the following is the initial sign of hypoxemia in an adult client? 1. Tachypnea 2. Tachycardia 3. Cyanosis 4. Pallor 5. Irritability 6. Flaring of Nares

Correct Answer: B

Rationale: Tachycardia (2) and irritability (5) are early signs of hypoxemia as the body compensates for low oxygen before later signs like cyanosis or flaring nares appear.

Correct Answer: C

Rationale: For 5'2 (62 inches) and 130 lbs, BMI = (130 ×703) / (62²) = 23.8, which falls in the normal range (18.5-24.9).

Correct Answer: D

Rationale: Checking tube placement is critical before feeding to ensure it's in the stomach, preventing aspiration.

Correct Answer: B

Rationale: HFNC provides high flow rates that can wash out dead space and allow precise FiO₂ control, making it a key consideration in its use, unlike the other options which are incorrect or less relevant.

Correct Answer: C

Rationale: The King LT uses dual cuffs (proximal and distal) to ventilate, with the tip typically in the esophagus, not the trachea.