Abstract: A treatment instrument for EMR and an EMR device are provided for excising a lesion portion while reducing complications and burdens to patients in an endoscopic mucosal resection. A separating and swelling member is included, so that a portion to be dissociated including the lesion portion, and a non-affected portion are separated and dissociated from each other by the separating and swelling member, and the lesion portion is swollen. The treatment instrument for EMR and the EMR device enable the endoscopic mucosal resection to be carried out more easily as compared with the conventional art, thereby greatly shortening an operation time, improving safety of the operation and moreover, reducing the burden of patients in comparison with the conventional art.

Abstract: The present invention relates to a collagen gel, its production process, a medical material in which it is used or a kit for its production, wherein said collagen gel is obtained by crosslinking collagen with polyanion and carbodiimide.