A nurse is preparing to administer vancomycin 500 mg via intermittent IV infusion every 6 hr. Available is vancomycin 500 mg in 0.9% sodium chloride 100 mL to infuse over 2 hr. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.).

Choice A rationale:

Dehydration is a serious condition, and a urine output of 40 mL/hr is indicative of decreased renal perfusion and potential renal failure. However, this situation does not require immediate intervention compared to other choices.

Choice B rationale:

Pain management is important, and a pain score of 4 out of 10 indicates mild to moderate pain. While addressing pain is essential for the client's comfort, it is not an immediate priority compared to the situation presented in another choice.

Choice C rationale:

(Correct Choice) A respiratory rate of 40 breaths per minute in a client with asthma indicates severe respiratory distress. This client is at risk of respiratory failure and requires immediate assessment and intervention.

Choice D rationale:

A fasting blood glucose of 100 mg/dL in a client with diabetes mellitus is within a normal range and does not require immediate attention when compared to the urgent situation in another choice.

Choice A rationale:

Lying down while practicing pursed-lip breathing is not the correct instruction. Pursed-lip breathing is usually performed in a sitting or standing position. Lying down can restrict lung expansion and may not effectively support the purpose of this breathing technique, which is to improve airway pressure and reduce air trapping.

Choice B rationale:

"Exhale slowly through your mouth" is the correct instruction for pursed-lip breathing. This technique involves inhaling through the nose for a count of two and exhaling slowly and steadily through pursed lips for a count of four. The goal is to promote better exhalation, prevent airway collapse, and improve oxygen exchange. The rationale behind this choice is grounded in the mechanics of pursed-lip breathing, which helps create backpressure in the airways, maintaining them open and aiding in proper exhalation.

Choice C rationale:

Inhaling through pursed lips contradicts the proper sequence of pursed-lip breathing. The technique involves inhaling through the nose and exhaling through pursed lips. Inhaling through pursed lips would not provide the intended benefits of the technique.

Choice D rationale:

"Puff your cheeks when exhaling" is not the correct instruction. Puffing the cheeks during exhalation does not contribute to the effectiveness of pursed-lip breathing. This action could potentially impede proper exhalation and defeat the purpose of the technique, which is to control airflow and improve breathing efficiency.