It is an air gap that allows air to escape rather than building up in the pipe and creating an air hammer within the pipes (banging noise), and problems with drainage. (think about pouring out of a can that doesnt have the second hole punched in it.
Suction Therapy : Suction therapy is provided to assist in the removal of bronchial secretions that cannot be expectorated by the patient spontaneously. Suct...
Physical therapy is the non-surgical treatment for a herniated disc. Most PT programs will begin with a passive treatment like modalities to include moist heat, ultrasound, or electrical stimulation. When the physical therapist thinks the patient is ready, they will begin them on an active treatment plan.