ResMed Inc.'s (RMD) growth is backed by its impressive global Mask sales growth. Of late, the company has been experiencing increased Device sales, reflecting the ongoing combined availability of AirSense 10 and AirSense 11 sleep devices. However, concerns loom over ResMed's escalating debt level and the adverse impact of macroeconomic challenges. In the past year, this Zacks Rank #3 (Hold) company's shares have surged 66.9% compared with 16.9% growth of the industry. The S&P 500 composite rose 21.1% during ...