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Inhaler Technique & Delivery Devices Flashcards

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  1. When using a metered-dose inhaler (MDI) without a spacer, what is the recommended inhalation technique?

    Answer: Slow, deep inhalation over 3–5 seconds

    A slow, deep inhalation over 3–5 seconds allows medication particles to travel deeper into the airways rather than impacting in the oropharynx.

  2. What is the primary advantage of using a valved holding chamber (spacer) with a metered-dose inhaler?

    Answer: Reduces the need for hand-breath coordination

    A spacer holds the aerosolized medication cloud so patients do not need to precisely coordinate actuation with inhalation, significantly improving drug delivery.

  3. For a dry powder inhaler (DPI), what is the optimal inhalation technique to ensure adequate drug deposition?

    Answer: Fast, forceful inhalation

    DPIs rely on the patient's inspiratory effort to disaggregate the powder; a fast, forceful inhalation generates the turbulence needed to disperse the medication into respirable particles.

  4. What is the recommended breath-hold duration after inhaling from a metered-dose inhaler?

    Answer: 5–10 seconds

    A breath-hold of 5–10 seconds allows inhaled particles to settle by gravity and diffusion in the airways before exhalation removes them.

  5. Which patient population is MOST likely to benefit from a nebulizer rather than a pressurized MDI or DPI for routine asthma therapy?

    Answer: Infants unable to use MDI or DPI devices

    Infants and very young children cannot generate adequate inspiratory flow or cooperate with MDI/DPI technique, making nebulizers the most practical delivery option.

  6. Before using a new metered-dose inhaler or one that has not been used for more than 2 weeks, a patient should:

    Answer: Prime the inhaler by releasing the recommended number of test sprays into the air

    Priming ensures the valve is loaded with a full dose and the propellant-drug mixture is uniform, so the first dose delivered to the patient is accurate.

  7. Which of the following is a common critical error when using a dry powder inhaler (DPI)?

    Answer: Exhaling forcefully into the device mouthpiece before inhalation

    Exhaling into a DPI introduces moisture that can clump the powder and block the dose, and it may waste the loaded dose before inhalation occurs.

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