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• W3044489302 abstract "<h3>BACKGROUND:</h3> This study compared 3 nebulizer technologies for inter- and intradevice reproducibility, humidification, and fill volume sensitivity during mechanical ventilation: a breath-enhanced jet nebulizer, a vibrating mesh nebulizer, and a jet nebulizer. The breath-enhanced jet nebulizer featured a new design located on the wet side of the humidifier to reduce aerosol loss and potential humidifier contamination. The vibrating mesh nebulizer and the jet nebulizer were placed on the dry side. <h3>METHODS:</h3> Aerosol delivery was measured using multiple ventilator settings (inspiratory time = 0.45–1.01 s). Using radiolabeled saline and a gamma camera, bench studies were performed using a ventilator to test 4 breathing patterns. Four scenarios were assessed during testing: 3 mL and 6 mL fill volumes with and without heated wire humidification. Measurements included inhaled mass (as a percentage of the nebulizer charge), nebulizer residual, mass balance, and aerosol particle size distribution. Statistics were determined using Mann-Whitney and linear regression. <h3>RESULTS:</h3> The inhaled mass for the breath-enhanced jet nebulizer was 10.5–29.2% and was affected by fill volume (<i>P</i> = .004) but not by humidity. The inhaled mass for the vibrating mesh nebulizer was 0.9–33% and was unaffected by fill volume and humidity. The inhaled mass for the jet nebulizer was 2.5–25.9% and was affected by both fill volume (<i>P</i> = .009) and humidity (3 mL, <i>P</i> = .002). The inhaled mass for the vibrating mesh nebulizer was more variable due to random failures to achieve complete nebulization, and inhaled mass correlated closely with residual mass: IM% = –0.233(Residual%) + 24.3, r² = 0.67, <i>P</i> < .001. For all devices, large particles were lost in the ventilator tubing; large particles were also lost in the humidifier for the vibrating mesh nebulizer (17% nebulizer charge), resulting in similar particle distributions (mass median aerodynamic diameter 1.33–1.95 μm) for all devices. <h3>CONCLUSIONS:</h3> Nebulization with the breath-enhanced jet nebulizer was less sensitive to humidification than the jet nebulizer. Delivery via the vibrating mesh nebulizer was not predictable, with random failure to empty (55% experimental runs). All devices delivered similar particle distributions. Wet-side aerosol delivery avoids humidifier contamination, and breath-enhanced technology can ensure better control of drug delivery." @default.
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• W3044489302 date "2020-07-21" @default.
• W3044489302 modified "2023-09-28" @default.
• W3044489302 title "Comparison of Vibrating Mesh, Jet, and Breath-Enhanced Nebulizers During Mechanical Ventilation" @default.
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• W3044489302 doi "https://doi.org/10.4187/respcare.07639" @default.
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