med.usyd.edu.au Background The mechanisms by which mandibular advancement splints (MAS) improve obstructive sleep apnoea (OSA) are not well understood. This study aimed to evaluate the mechanism of ...

sternum and ribs had been fractured and that her labial frenulum (the small piece of connective tissue between the lips and gum) was torn, which indicates that she was likely forcefully smothered ...

Pursed lip breathing may make your breaths more effective. In fact, it’s often a treatment for COPD. To do it, you inhale by puckering your lips and exhaling slowly, often to a count. Pursed lip ...