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Endoscope with continuous irrigation

阅读:967发布:2023-04-20

专利汇可以提供Endoscope with continuous irrigation专利检索,专利查询,专利分析的服务。并且Urological endoscopic instruments known before this invention do not permit continuous clear vision of the operative field because such vision is periodically obscured by the turbid fluid produced at the operative field. The invention produces continuous clear vision of the operative field by causing continuous inflow of clear irrigating fluid to the operative field and continuous outflow of turbid fluid from the operative field, thus providing a continuously flowing system which is provided by two conduits, one for inflowing clear fluid having its outflow port within the beak of the sheath and below and in front of the objective lens of the telescope which forms part of the instrument, and one for turbid outflowing fluid from the operative field having its inlet port in the exterior of the sheath above the objective lens and to the rear of the beak, so that the inflowing clear fluid must pass through the operative field to reach the inlet port of the outflow conduit, the outflow of fluid being maintained by suction applied to the outflow conduit.,下面是Endoscope with continuous irrigation专利的具体信息内容。

1. A urological endoscopic instrument, comprising an elongated cylindrical beaked sheath, a telescope extending longitudinally and interiorly of the sheath and having an objective lens at its distal end, an inflow conduit extending longitudinally and interiorly of the sheath having its discharge port below and in front of the objective lens and within the beak of the sheath, an external fluid conducting connection at the proximate end of the inflow conduit for connection to a source of clear irrigating fluid, an outflow conduit extending longitudinally and interiorly of the sheath and having an inlet port provided by at least one opening from the outside of the sheath above and to the rear of the objective lens and to the rear of the beak, and means for applying suction to the outflow conduit.
2. An instrument according to claim 1, in which the two conduits are of substantially the same size to conduct substantially the same volume of fluid.
3. An instrument according to claim 1, in which the inflow conduit is formed by the interior of the sheath and the outflow conduit is formed by the space between the upper wall of the sheath and a second wall spaced radially inwardly of the sheath therefrom.
4. An instrument according to claim 3, in which the distal end of the outflow conduit is closed and the inlet to the outflow conduit is provided by a port in the upper wall of the sheath adjacent its distal end which communicates with the outflow conduit.
5. An instrument according to claim 1, in which the telescope and the sheath are concentric.
6. An instrument according to claim 1, comprising a tube extending longitudinally and interiorly of the sheath and surrounding the telescope and being larger than the telescope and smaller than the sheath in cross section, the outflow conduit being provided by the interior space of the tube and the inflow conduit being provided by the space between the tube and the sheath.
7. An instrument according to claim 6, in which the lower part of the tube engages the lower part of the telescope and the outflow conduit is provided by the space between the upper part of the telescope and the upper part of the tube.
8. An instrument according to claim 6, in which the tube is substantially semicircular in cross sectional shape, and the outflow conduit is provided by the space between the telescope and the sides of the tube.
9. An instrument according to claim 6, comprising in addition a closure between the distal end of the tube and the interior wall of the sheath, and at least one opening in the sheath proximate to the closure forming an inlet for the outflow conduit.
10. An instrument according to claim 1, comprising a tube extending longitudinally and interiorly of the sheath and surrounding the telescope and being larger than the telescope and smaller than the sheath in cross section, the inflow conduit being provided by the interior space of the tube and the outflow conduit being provided by the space between the tube and the sheath.
11. An Instrument according to claim 10, comprising in addition a closure between the distal end of the tube and the interior wall of the sheath and at least one opening in the sheath proximate to the closure forming an inlet for the outflow conduit.
12. An instrument according to claim 10, in which the walls of the tube forming the inflow conduit converge downwardly throughout at least a part of their length whereby to increase the cross sectional area of the outflow conduit between the tube and the sheath.
13. An instrument according to claim 10, in which the interior wall of the sheath converges from the proximal to the distal end of the sheath, and at the distal end the internal diameter of the sheath is substantially equal to the external diameter of the closure.
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