“Therapeutic” facemasks

Vision through various scuba facemasks.

The visual performance of divers was compared utilizing five commercial facemasks. Measurements were made of visual fields, visual acuity, stereoacuity, hand-eye coordination, accuracy of distance estimates, and accuracy of size estimates at both near and far distances. In addition, the optical properties of the masks were measured and the susceptibility of each mask to fogging was tested. Ther...

Facemasks and aerosol delivery in vivo.

It has been shown in vitro that even a small air leak in the facemask can drastically reduce the efficiency of drug delivery. In addition, it has been shown that drug deposition on the face does significantly add to overall drug loss and has the potential of local side effects. The aim of this study is therefore to verify these findings in vivo. Eight asymptomatic recurrently wheezy children, a...

Transmission of communicable respiratory infections and facemasks

BACKGROUND Respiratory protection efficiency of facemasks is critically important in the battle against communicable respiratory infections such as influenza and severe acute respiratory syndrome (SARS). We studied the spatial distributions of simulated virus-laden respiratory droplets when human subjects wore facemasks and were exposed to regulatory viral droplets by conducting in vivo experim...

The Use of Facemasks and Respirators during an Influenza Pandemic

Failure of a Cordless Screwdriver to Remove Lacrosse Helmet Facemasks

Facemask removal (FMR) is essential when potential cervical spine injuries occur in athletes wearing helmets. Used football helmets produce high failure rates of screw removal; however, research on lacrosse helmets is lacking. This study aimed to determine the frequency of FMR failure in lacrosse helmets worn at least 1 season. The authors collected used helmets from 4 colleges (n = 172) and 4 ...