Method of securing a cavity using a rigid sheath with transparent cap

A method of securing a cavity in a living body, comprising the steps of:

• incising a small portion of the body so as to form a small incised portion;
• introducing an assembly of a rigid sheath with a rigid transparent cap and an endoscope into the small incised portion between a first tissue and a second tissue, said rigid transparent cap being at an end portion of the rigid sheath and said rigid transparent cap including an opening formed at a distal end thereof for enabling direct observation to be performed by the endoscope through the opening;
• and
• detaching the second tissue from the first tissue using the rigid sheath with the rigid transparent cap and an instrument to form a cavity.

A method of securing a cavity in a living body, comprising the steps of:

• incising a small portion of the body so as to form a small incised portion;
• introducing an assembly of a rigid sheath with a rigid transparent cap and an endoscope into the small incised portion between a first tissue and a second tissue;
• and
• detaching the second tissue from the first tissue by moving an edge of the rigid transparent cap from side to side or by advancing the edge of the rigid transparent cap, while performing observation through the endoscope.

A method of securing a cavity in a living body, comprising the steps of:

• incising a small portion of an abdominal wall of the body such that only a peritoneum remains for forming a small incised portion;
• introducing an assembly of a rigid sheath with a rigid transparent cap and an endoscope into the small incised portion, said rigid transparent cap being at an end portion of the rigid sheath and said rigid transparent cap including an opening formed at a distal end thereof for enabling direct observation to be performed by the endoscope through the opening;
• and
• detaching the abdominal wall from the peritoneum using the rigid sheath with the rigid transparent cap or an instrument to form a cavity between the abdominal wall and the peritoneum.