Anastomotic instrument, endoscope system, and control method of anastomotic instrument

An endoscope system comprising:

• (A) an endoscope including:
• an insert section to be introduced into an alimentary canal;
• and
• a handling section coupled to said insert section and used in operation of said endoscope;
• (B) an anastomotic instrument including:
• a first unit attached to said insert section on a side of a distal end of said insert section;
• a second unit set on said insert section on a side of a proximal end of said insert section relative to said first unit;
• a suction device for sucking out fluid from space enclosed by said first and second units in said alimentary canal so as to bring said space into negative pressure, and shrinking said alimentary canal in said space;
• a resecting device for shifting one of said first and second units relative to the other one of said first and second units, and resecting living body tissue of said alimentary canal in a state of being caught between said first and second units;
• and
• a fastening device for joining said alimentary canal so as to close an incision of said living body tissue.

A control method of an anastomotic instrument, said anastomotic instrument including a first unit attached to an insert section of an endoscope to be inserted into an alimentary canal on a side of a distal end of said insert section, a second unit set on said insert section on a side of a proximal end of said insert section relative to said first unit, a suction device for sucking out fluid from space enclosed by said first and second units in said alimentary canal, a resecting device for resecting living body tissue of said alimentary canal, and a fastening device for joining said alimentary canal so as to close an incision of said living body tissue, said control method comprising the steps of:

• actuating said suction device, said suction device sucking out said fluid from said space enclosed by said first and second units in said alimentary canal, so as to bring said space into negative pressure and shrink said alimentary canal in said space;
• shifting one of said first and second units relative to the other one of said first and second units, such that said shrunk alimentary canal is caught between said first and second units;
• actuating said resecting device, said resecting device resecting said living body tissue of said alimentary canal in a state of being caught between said first and second units;
• and
• actuating said fastening device, said fastening device joining said alimentary canal after the resection of said living body tissue.