Which of the following statements are true concerning bubble humidifiers?

What is the relative hmidity when the absolute humidity is 10 mg H2O/L and the capacity is 18 mg H2O/L?

Which of the following devices is most suitable for delivery of treprostinil?

An MDI is ordered for a patient who is intubated and being mechanically ventilated and humidified with a heat-moisture exchanger (HME). Which of the following is the most appropriate way to administer the bronchodilator?

What is the preferred method for delivering bronchodilators to intubated patient on mechanical ventilation?

In a dose-response assessment of a patient’s response to a metered dose inhaler bronchodilator, when would you stop increasing the dose?1. When the peak expiratory flow rate improves less than 10% to 15%2. When tachycardia occurs3. When tremors are evident4. When 6 to 8 puffs are delivered

Which of the following would be correct instructions for a patient being taught proper use of a dry powder inhaler?1. Place mouthpiece 4 cm from mouth2. Exhale slowly to FRC3. Inhale deeply and forcefully (>60 L/min). A breath holdshould be encouraged but is not essential.4. Repeat until dose is used up

What is the most reliable indicator of a change in airway resistance due to bronchodilator administration during mechanical ventilation?

A physician orders bland water aerosol administration to a patient with an intact upper airway with no artifical airway. Which of the following airway appliances could you use to meet this goal?1. Simple O2 mask2. Face tent3. T tube4. Aerosol mask

To ensure delivery of the proper drug dosage with a metered dose inhaler, which of the following must be done before its use?1. The canister valve stem should be cleaned with a sharp 18 gauge needle..2. The canister should be warmed to hand or body temperature.3. The canister should be vigorously shaken.