An<unk> tic<unk>  or commercially referred to as a "Valved Holding Chamber" (VHC), is a device used by an<unk> tic person to increase the effectiveness of an<unk>  inhaler.<unk> s are specially designed plastic or metal tubes that fit an inhaler on one end, while the patient breathes normally on the other end.  Some<unk> s utilize a collapsing bag design to provide visual feedback that successful inspiration is taking place.
Asthma spacer
Nebulizer
Cough surgery
Occupational asthma medical therapy
Allergy interventions
Rhinosinusitis surgery
Cough medicine
Particle therapy