| 摘要 |
<p>An irrigation control valve (10) for endoscopic instruments wherein the valve body is bilaterally symmetrical and includes a housing (16), a plurality of valve chambers (14a, 14b), pistons for reciprocal movement within each of said chambers, an inlet port for connection (22a) to a source of an irrigation fluid, a vacuum port (22b) for connection to a source of vacuum, and symmetrical opposed fittings (32a, 32b) for mounting a probe in either one of two positions to accommodate both the right-handed and left-handed clinician. The design of both the pistons and valve body are compatible with injection molding fabrication techniques, and provide for replacement and/or change of the probe. Such interchange and/or replacement of the probe can be accomplished without clamping off of either the source of irrigation fluid or the source of suction because of the proximal location of the probe connection to the valve body relative to both the irrigation and suction valves.</p> |
