Q&A: Is a concave mattress considered a restraint? AAPACN Clinical Care Solutions / DNS / Q&A / Survey and Regulatory Compliance October 25, 2022 October 25, 2022 Share via: Facebook Twitter LinkedIn Question: Is a concave mattress considered a restraint? Answer from Carol Maher, RN-BC, RAC-MTA, RAC-CTA, RAC-CT, CPC: According to Appendix PP of the State Operations Manual, a restraint is defined as, “Any manual method or...Oops! This is member-only content. Please login, sign up for a full membership, or sign up for a free 30-day trial membership to access this content.