It’s no surprise that, for centuries, people thought love (and most other emotions, for that matter) arose from the heart. And chances are, your heart was thudding in your chest. You may have stammered, your palms may have sweated you may have said something incredibly asinine and tripped spectacularly while trying to saunter away (or is that just me?). Think of the last time you ran into someone you find attractive. So, if there’s really a “formula” for love, what is it, and what does it mean? Total Eclipse of the Brain What we do know, however, is that much of love can be explained by chemistry. Needless to say, the scientific basis of love is often sensationalized, and as with most science, we don’t know enough to draw firm conclusions about every piece of the puzzle. Google the phrase “biology of love” and you’ll get answers that run the gamut of accuracy. It turns out the science behind love is both simpler and more complex than we might think. Exhaust ports over the nasal bridge in face masks effect important decreases in dynamic dead space provided positive pressure throughout the expiratory phase is used.Scientists in fields ranging from anthropology to neuroscience have been asking this same question (albeit less eloquently) for decades. Face masks with expiratory ports over the nasal bridge resulted in beneficial flow characteristics within the face mask and nasal cavity, so as to decrease total dynamic dead space to less than physiological dead space from 42% to 28.5% of tidal volume. Pressure assist and pressure support ventilation decreased total dynamic dead space to a lesser degree, from 42% to 39% of tidal volume. The use of noninvasive ventilation modes such as bilevel and continuous positive airway pressure, with continuous pressure throughout the expiratory phase, reduced total dynamic dead space to approach physiological dead space with most face masks. Total dynamic dead space during spontaneous ventilation was increased above physiological dead space from 32% to 42% of tidal volume by using face masks. Using a spontaneous breathing model, total dynamic dead space was measured when using 19 commercially available face masks and a range of ventilators in various ventilation modes. The aim of this study was to determine what the influence of different designs of face masks and different noninvasive ventilator modes would be upon total dynamic dead space.
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