Might help in some cases. What happened to me 2 years ago was terrible. Went to ER in severe pain. Told them upon admit I had severe sleep apnea as well as my medical history. After 3 days of testing had 5 hr. Surgery for infected gall bladder and liver abscess. Was doing fine back in my hospital ro...

To keep my back strap from slipping upward, I put may hair in a low pony tail at the nape of my neck. Then I slip the back strap under the pony tail and it works great. If you don't have long enough hair to pull back, you're SOL.