The Native American Sioux used a Healing Ritual known as Yuwipi for generations. The Practice involved the use of blankets blessed by a Medicine Man, which were then wrapped or rolled around the afflicted person. Tied into place, The Shaman would then invoke various Healing Spirits to enter the rolls and heal the ill person. The process may take several days. However, many Sioux did not use the practice until it was seen as a last resort. It was felt that the ill person (while seen as healed), would never quite recover and often still suffered after effects from the Ritual.