| 摘要 |
A continuous flow cystoscope is shown. The cystoscope includes an outer sheath having an outer surface, a hollowed out central area extending along a central axis which extends therethrough, a proximal section and a distal section. The distal section includes a distal end having a member defining an opening. In the preferred embodiment, the outer sheath opening is formed at an acute angle relative the central axis. The distal section of the outer sheath includes an elongated fenestra extending distally therefrom along a path substantially parallel to and spaced from the central axis. The proximal section of the outer sheath includes an inlet port and an outlet port. An inner member is positioned within the hollowed out central area of the outer sheath and includes an inner member channel having a first passageway which is adapted to receive a telescope and a second passageway which is utilized for passing a working tool, such as a laser fiber. The outer sheath and the inner member are spaced apart to form an outflow fluid passageway therebetween. The inner member includes a distal section which has an irrigation inlet and a distal end. The irrigation inlet and distal end are positioned in the opening of the distal section of the outer sheath. The inner member includes an elongated lip which cooperates with the elongated fenestra of the outer sheath to form a fenestra channel having an irrigation outlet. The fenestra channel communicates with the fluid passageway. The inner member channel communicates with the inlet port for passing fluid therethrough to irrigate an operative site. The fenestra channel passes fluid emanating from the irrigation inlet over a flow path having reduced fluid turbulence to the irrigation outlet, through the fenestra channel, through the fluid passageway and through the outlet port of the outer sheath.
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