To wear a mask or not?, page-15

https://cnsnews.com/commentary/dr-jim-meehan/surgeon-destroys-myth-if-masks-dont-work-why-do-surgeons-wear-them

First, let’s be clear. The premise that surgeons wearing masks serves as evidence that “masks must work to prevent viral transmission” is a logical fallacy that I would classify as an argument of false equivalence, or comparing “apples to oranges.”

Although surgeons do wear masks to prevent their respiratory droplets from contaminating the surgical field and the exposed internal tissues of our surgical patients, that is about as far as the analogy extends. Obviously, surgeons cannot “socially distance” from their surgical patients (unless we use robotic surgical devices, in which case, I would definitely not wear a mask).

The CoVID-19 pandemic is about viral transmission. Surgical and cloth masks do nothing to prevent viral transmission. We should all realize by now that face masks have never been shown to prevent or protect against viral transmission. Which is exactly why they have never been recommended for use during the seasonal flu outbreak, epidemics, or previous pandemics.

Unlike the public wearing masks in the community, surgeons work in sterile surgical suites equipped with heavy duty air exchange systems that maintain positive pressures, exchange and filter the room air at a very high level, and increase the oxygen content of the room air. These conditions limit the negative effects of masks on the surgeon and operating room staff. And yet despite these extreme climate control conditions, clinical studies demonstrate the negative effects (lowering arterial oxygen and carbon dioxide re-breathing) of surgical masks on surgeon physiology and performance.