Method for closing wound

A method for closing a wound in a tubular organ using a suture thread,

• a peripheral edge of the wound including a first edge portion, a second edge portion located opposite the first edge portion across the wound in a wound width direction, a third edge portion adjacent to the second edge portion, and a fourth edge portion located opposite the third edge portion across the wound in the wound width direction,
• an opening of the wound in the wound width direction being largest between the third edge portion and the fourth edge portion such that a distance between an edge-end of the third edge portion and an edge-end of the fourth edge portion is a maximum distance between edges of the wound,
• a distance between an edge-end of the first edge portion and an edge-end of the second edge portion in the wound width direction is narrower than the distance between the edge-end of the third edge portion and the edge-end of the fourth edge portion in the wound width direction,
• the method comprising:
• a first step of connecting the first edge portion and the second edge portion with the suture thread, the first step including passing the suture thread through:
• a first position on a mucosal surface of at least one of the first edge portion and the second edge portion, and
• a second position on the mucosal surface that is spaced from the first position;
• and
• a second step of connecting the third edge portion and the fourth edge portion with the suture thread, the second step including passing the suture thread through:
• a third position on the mucosal surface of at least one of the third edge portion and the fourth edge portion, and
• a fourth position on the mucosal surface that is spaced from the third position,
• wherein a second distance between the third position and the fourth position is smaller than a first distance between the first position and the second position.