Devices and methods for anchoring a sheath in a tissue cavity

An anchoring system, comprising:

• a sleeve having an inner surface defining a first lumen, wherein the sleeve is configured to be disposed in a tissue cavity proximal to a damaged area of tissue of the tissue cavity;
• a pressure tube in fluid connection with an outer surface of the sleeve;
• a sheath in connection with the sleeve, the sheath forming a second lumen, the second lumen being in fluid connection with the first lumen of the sleeve, the sheath having an end in sealed fluid communication with, and extending distal to, a distal end of the sleeve, wherein the end of the sheath, extending distal to the distal end of the sleeve, is configured to cover and protect the damaged area of the tissue of the tissue cavity from content flowing through the second lumen of the sheath and the first lumen of the sleeve;
• and
• a negative pressure system having a source of negative pressure coupled to the sleeve via the pressure tube, the negative pressure system configured to create a vacuum to cause the sleeve to remain in place in the tissue cavity at an anchor site proximal to the damaged area of tissue of the tissue cavity,
• wherein the sleeve is configured to stay in place at the anchor site proximal to the damaged area of tissue of the tissue cavity during peristalsis of a patient's bowel.