A resident using a metered-dose inhaler should be taught to:

a.Shake it, exhale, then inhale slowly while pressing and hold the breath about 10 seconds
b.Inhale as fast and hard as possible without holding the breath
c.Take two puffs in one single breath at the same instant
d.Use it only after eating a full meal

解析

Proper inhaler technique means shaking the canister, exhaling fully, then inhaling slowly during actuation and holding the breath about 10 seconds so the medication reaches the lungs. A spacer improves delivery, and waiting about a minute between puffs is recommended.

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