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.
I don't touch shortening (tailored) jacket sleeves from the top because there is usually a lot of 'engineering' there that is difficult to unpick and reinstate. Sometimes there is a sleevehead, and sometimes the body and body lining are attached to the sleeve and bound before the sleeve lining is handstitched in place.