Abstract
THE APPLICATION of pressure has been used to facilitate the healing of wounds, burns, fractures and chronic ulceration of the leg and to prevent hemorrhage, cavitation, edema and stagnation of tissue fluid following surgical intervention and skin grafting. Pressure was first used in the maxillary sinus by Ferris Smith1 to hold a cutaneous graft in place. Pressure has also been used in the maxillary sinus by Shea2 to hold the walls in position after reduction of a fracture. In most of the aforementioned procedures the use of pressure was designed primarily to prevent accumulation of, or to promote removal of, an abnormal amount of tissue fluid. Allergic disease of the nose and paranasal sinuses is characterized by edema due to accumulation of an abnormal amount of tissue fluid in the interstitial tissue spaces of the sinal mucosa.3 If the allergenic stimulus is brief, the excess tissue fluid is absorbed and

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