| 摘要 |
The cautery instrument body has finger-operated valves for respective connection to sources of suction and irrigation. The valve plungers each have at least one O-ring which engages against a shoulder on the body when the valves are closed to cause positive shutoff when the valves are unactuated. The suction control valve has an adjustable stop to limit valve opening to control suction. The body has connection ports on each end so that it is reversible and has a clear polymer cannula attached in one of the ports for endoscopic utilization. The other port carries a cautery rod which can be extended out of the cannula. The suction and irrigation valves, the adjustable suction stop, and the cautery rod are all positioned so that they can be operated by the fingers of the hand which holds the body of the instrument.
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