Medicare allows for mask cushion replacement every three (3) months, and a complete mask system replacement every six (6) months. CPAP manufacturers and vendors suggest these replacement schedules as well. In our experience, most mask cushions begin to deteriorate after about six months of use.
Hereâs what you do: 1  Figure out the length that you want your finished sleeve to be. On the outside of the shirt, mark that spot with a line. 2  Using a see-through ruler or regular ruler, mark a line 1 Â½â underneath the first line. Use the ruler to continue that line across the sleeve. 3  Repeat on the other sleeve.  Cut on the second line you drew.
Pin the sleeve and armhole together. This bit is a careful operation. Stick the pins in perpendicular to the edge on the sleeve side (that way the sleeve gathers will be facing up when you sew them to help you control them). Rather than sticking the pins in willy-nilly, itâs a good idea to pin at the following strategic points, matching up sleeve and bodice: