| 主权项 |
1. An endoscopic surgical device comprising:
an endoscope that observes the inside of a body cavity; a treatment tool that inspects or treats an affected part within the body cavity; and an overtube that guides the endoscope and the treatment tool into the body cavity, wherein the overtube includes an overtube body that passes through a body wall and is inserted into the body cavity, an endoscope insertion passage that is provided inside the overtube body and allows the endoscope to be inserted therethrough so as to be movable forward and backward, a treatment tool insertion passage that is provided inside the overtube body and allows the treatment tool to be inserted therethrough so as to be movable forward and backward, an interlocking member which is configured to be movable forward and backward inside the overtube body, has an endoscope-coupled part to be coupled to the endoscope inserted through the endoscope insertion passage and a treatment tool-coupled part to be coupled to the treatment tool inserted through the treatment tool insertion passage, and has a dead zone where the forward and backward movement of either one of the endoscope and the treatment tool does not interlock with the movement of the other, and a sensing zone where the forward and backward movement of either one of the endoscope and the treatment tool interlocks with the movement of the other, and a side surface opening that is formed to pass through a side wall of the overtube body, allows an inner cavity of the overtube body and the inside of the body cavity to communicate with each other when the overtube body is inserted into the body cavity, and sends a fluid into the body cavity through the inner cavity of the overtube body, and wherein the side surface opening is configured to be openable and closable by the forward and backward movement of the interlocking member. |
