Disposable masks usually have two sides, generally divided into darker or lighter sides. The lighter side should be the face contact surface and the darker side the outside. You can also judge the front and back of the white mask according to the position of the metal strip.  The metal strip is above and outside should be the correct way t...

The correct way to wear disposable medical masks: 1. Wash your hands and check the expiration date and outer packaging of the mask.  2. The side of the nose clip is facing upwards, and the dark side is facing outwards. If there is no color, it is judged from the folds of the mask, and the folds are outwards.  3. Pull ...

Abstract A combined in vivo and in vitro testing method for surgical masks is presented. The mask to be tested was placed over the nose and mouth of a manikin which was accurately constructed according to human measurements. The manikin was placed in a special counting chamber and a known number of bacteria were blown through...

My practice can no longer obtain surgical masks.  Are they necessary in the operating room (OR)? It is recommended that all personnel wear a surgical mask in the OR to prevent contamination of the surgical site and surgical instruments with droplets from the nose and mouth. It is important that the masks be used properly (i.e., tied appropriate...

N95 Respirators Not for Use by the Public The Centers for Disease Control and Prevention (CDC) does not recommend that the general public wear N95 respirators to protect themselves from respiratory diseases, including coronavirus (COVID-19). The best way to prevent illness is to avoid being exposed to this virus. However, as a reminder, CDC alw...