Patent ID: 6347630
Filing Date: 2002-02-19
Classification: A61M

Abstract:
A respiration-synchronized oxygen supplying apparatus comprising:a sensor to detect respiration of a patient, the sensor having a casing with a planar piezoelectric device having a planar face disposed in the casing, a first vent being formed in the casing parallel to the planar face of the piezoelectric element, and a second vent being formed in the casing perpendicular to the planar face of the planar piezoelectric device; a valve disposed between a first gas passage, which is adapted to be coupled to a patient and a second gas passage, which is coupled with an oxygen supplier; a controller for opening the valve when the sensor detects inhalation of the patient; negative pressure generating means disposed between the sensor and the first gas passage having a gas communication area having a first end closer to the patient and a second end farther from the patient, and having a volume which decreases from the second end to the first end; and a third gas passage connecting to the negative pressure generating means communicating to the second vent of the sensor.