| 摘要 |
PROBLEM TO BE SOLVED: To provide a heating and humidifying device for a respiratory gas which can stably supply a respiratory gas that is sufficiently heated and humidified to a patient without displacing a heater wire to one side when an air sending tube is bent, expanded, and contracted and causing dew formation.SOLUTION: A heating and humidifying device for a respiratory gas includes a heating and humidifying device body 1 for heating and humidifying a respiratory gas and an air sending tube 5 which connects the heating and humidifying device body 1 and a patient interface 2 attached to a patient for supplying the respiratory gas to the patient. The air sending tube 5 includes a bellows-shaped inner tube 20, a bellows-shaped outer tube 10 which forms an insulation layer 11 between the inner tube 20 and the outer tube and encloses the inner tube 20, and a heater wire 30 wound on the outside of the inner tube 20 between the inner tube 20 and the outer tube 10.SELECTED DRAWING: Figure 1 |
