All of the following can reduce the reliability of conventional pulse oximetry except:

Calculate VT at 6 mL/kg predicted body weight.

Explain why CPAP was a reasonable initial support choice.

Which conditions can make a proposed PEEP increase particularly hazardous and require careful reassessment? Untreated significant pneumothorax Marked hypovolemia with poor perfusion A substantial bronchopleural fistula Stable blood pressure with adequate perfusion

A vasopressor-treated patient has an erratic finger SpO2 of 78%, a weak pleth signal, and an oximeter pulse of 42/min while ECG shows 106/min. What is the best next step?

Calculate airway resistance immediately before and after treatment.

All of the following can cause a sudden decrease in measured EtCO2 except:

Recommend the first lung-protective VT change and name one measurement needed to evaluate the response.

What does elevated FeNO suggest in a symptomatic patient with suspected asthma, and what can it not establish alone?

A practical nurse is assigned to the emergency department after a chemical spill. What is the nurse’s priority action when assessing a client with suspected chemical burns?