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...
In both, a practitioner creates suction in a cup, applies the cup to the patientâs body, and in response to the suction, blood rushes to the area and the skin at the contact site is âsucked upâ into the cup. Newer methods of cupping use mechanical devices to create the suction.