| 摘要 |
A respiratory mask (10) suitable for the treatment of sleep apnea is formed from an inner layer (14) of plastic material molded to the shape of the face of the patient (12). Air is supplied to the mask from a flexible hose (28) connected to the inlet end of a bifurcated air supply tube (26) molded into the mask. Tube (26) discharges air into a plenum chamber formed between the layers (14,16) just below the nostrils of the patient (12) and is inhaled through nostril holes in the inner layer (14). Exhaled air and overflow air from supply tube (26) is discharged through the ends of a tubular a muffler assembly (34) that is mounted transversely adjacent the upper lip of the patient (12). Diffuser plugs (3) are inserted into the outer ends of the muffler to attenuate the noise of the discharging air and to disperse its flow. The mask (10) is held in place by a neck strap (36) that is anchored to hooks (40) on the ends of the muffler assembly (34), and by a pate harness that is attached to hooks (44) in the forehead portion (18) of the mask (10). The construction is such that incoming air does not contact the skin of the patient's face and, therefore, does not tend to lift or move the mask from or on the face of the patient during use. |
