| 摘要 |
<p>A nebulizer (10) includes a piezoelectric transducer (200) for aerosolizing a drug solution (110) in a disposable cup module (40) disposed above the transducer (200). Acoustic waves generated by the transducer (200) propagate sequentially through transmitting medium (230), a first barrier (210), coupling medium (230), and a second barrier (130) that forms part of the cup module (40), and into the interior of the cup module (40). The transducer (200) at least partially comprises silver (205). The silver (205) fluidly contacts the transmitting medium (230) to discourage bacteria growth in the transmitting medium (230). The device (10) includes electronics components (300) that drive the transducer (200) and measure an electrical characteristic associated with the transducer (200) during operation. The electronics components (300) measures changes in the electrical characteristic to determine when the drug solution (120) level falls below a predetermined threshold, and deactivates the device (10) accordingly.</p> |
