Clinically it is felt as crepitus and, if extensive, may cause soft tissue swelling and discomfort. Even when severe subcutaneous emphysema is typically benign, although complications such as airway compromise, respiratory failure, pacemaker malfunction and tension phenomena have been described.
A medical assistant may lawfully perform spirometric pulmonary function testing if the test is a usual and customary part of the medical practice where the medical assistant is employed, and the requirements for training, competency, authorization and supervision are satisfied.
Clinically, medical assistant specialists may be asked to perform electrocardiograms, draw blood, and record patients' vital signs, including blood pressure. In some states, they may also give injections. Additional duties will vary depending on their specialty.