Surgical instrument

A surgical instrument used in a cutting operation of a trabecular meshwork, the surgical instrument comprising:

• a grasping portion which a practitioner grasps;
• and
• a probe which is arranged so as to extend like a rod from an end portion of the grasping portion and has a high rigidity,
• wherein said probe comprises:
• an outflow port which flows out a cleaning liquid toward the trabecular meshwork corresponding to a cut position;
• a suction port which is formed in a side surface of said probe, collects the cleaning liquid flowed out of said outflow port as a waste liquid, and sucks the trabecular meshwork into an inner portion of the probe;
• a cutting portion which cuts the trabecular meshwork sucked into the suction port;
• and
• a protection portion which is arranged closer to a leading end side of said probe than said suction port and the cutting portion, has such a shape as to be extended to a side surface forming said suction port in the leading end of said probe, and protects an outer wall of a canal of Schlemn corresponding to a non-cut position from the cutting and the suction by being positioned between said cutting portion and the outer wall of the canal of Schlemn during the cutting of the trabecular meshwork by said cutting portion, and
• wherein the surgical instrument further comprises:
• a first delivery portion which is connected to a power supply portion for cutting a vitreous body in a vitreous body cutting device transmitting power in a vitreous body cutting operation and carrying out the delivery of the cleaning liquid and the collection of the waster liquid, and is provided for feeding the power for cutting from the device to said cutting portion;
• a second delivery portion which is connected to a cleaning liquid supply portion for cutting the vitreous body in said vitreous body cutting device, and is provided for feeding the cleaning liquid from the vitreous body cutting device to said outflow port;
• and
• a third delivery portion which is connected to a suction portion for cutting the vitreous body in said vitreous body cutting device, and is provided for feeding the waste liquid sucked by said suction port and the cut trabecular meshwork to the vitreous body cutting device.