Can anyone help with some advice/ideas on how to roll/turn a patient with a chronic left hip dissociation who also has left knee contraction - due to the hip dislocation it sits at a 90 degree angle in the bed and can only be straightened as far as- see photo. He also has a right leg above knee amputation and is completely immobile (78 year old) He has a pressure sore developing on his sacrum so requires turning regularly but this causes extreme pain - any suggestions on how or what equipment could be used to help.