Abstract: A facial mask for use in medical respiratory treatments such as sleep apnea CPAP therapy. The mask includes a preferably transparent front plate to which is attached a skirt of flexible material adapted to sealingly impinge on the face of a patient. The mask is of sufficient size so that as it seals the nose from all but the desired therapeutic airflow, the sealing pressures will be felt on the forehead, the upper lip, and the malar region of the face spaced from the nose. Thus pressure on the bridge of the nose and in the maxillary region adjacent to the nose are avoided, resulting in a significant decrease in the possibility of intense pain.

Abstract: An apparatus and method for electrically stable electrodes and sensors having a flexible base or substrate. One or more flexible and pressure sensitive resistors having a high resistance and a high temperature coefficient of resistivity are printed on a first surface of the flexible base, and a second set of one or more substantially identical resistors are printed on a second surface such that each resistor on the second surface is directly opposite a resistor on the first surface. The opposing resistors are then electrically interconnected in mating pairs, so that when the substrate is flexed, one resistor of each pair is compressed and the other is tensed with the result that the changes in resistance cancel one another.

Abstract: An apnea monitor employs dual detectors for determining patient breaths while rejecting cardiac artifacts. The first detector examines a respiration signal at a first sensitivity for apparent breaths. The second detector examines at a second sensitivity to determine if the apparent breath was actually an artifact.