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...
Inversion Therapy. Inversion therapy is a method of spinal traction, or decompression, that involves you being in a head-down position. The theory behind inversion therapy is to relieve the pressure at the nerve roots and discs in your spine by taking away the pressure created by gravity. This also opens up the intervertebral space, again, as a way to relieve pressure in your spine.