What is the purpose of the end-inspiratory breath hold used in conjunction with aerosol delivery?

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Quizplus · Accepted Answer

Although we do not wish a patient to hyperventilate,prevention of hyperventilation is not the purpose of the breath hold.A slow,even respiratory rate is the best way to avoid hyperventilation.The more time an aerosol has to reach BTPS (body temperature,barometric pressure,and saturated with water)under these conditions,the larger its particles become because of their hygroscopic properties and the more likely they are to fall out of suspension before reaching the lower respiratory tract.The encouragement of a breath hold can increase the settling of particles;however,depending on particle size,a particle may not fall out of suspension.Inertial impaction occurs during the initial act of inspiring,before the end-inspiratory breath hold.

What Is the Purpose of the End-Inspiratory Breath Hold Used