During rectal or complex digestive surgery with multiple digestive resections and anastomosis, the creation of enterostomy is a common procedure. In France, it is estimated that 20000 patients have an ileostomy and 16000 new digestive stomas are formed each year with approximately 30% of enterostomy. Enterostomy might sometimes give high-output not controlled with usual medical treatment (e.g loperamide ± codeine) and exposes the patients to important hydro-electrolytic loss leading to a risk for dehydration, electrolyte abnormalities and acute renal failure. This risk implies parenteral correction which may extend hospital stay and delay home return.