A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/113, 128/2
A61M 23/00 (2006.01) A61B 1/12 (2006.01) A61B 1/307 (2006.01)
Patent
CA 1177350
Continuous Flow Urological Endoscopic Apparatus Abstract A continuous flow urological endoscopic appar- atus includes an endoscope having a reciprocatively- mounted treating device. For circulating fluid into and out of a body cavity for flushing purposes, a delivery conduit conveys clear irrigating fluid under pressure to the interior of the body cavity via the open end of the endoscope sheath. A return conduit withdraws turbid fluid from the interior of the body cavity. An inlet of the return conduit is positioned within the sheath forwardly by a sub- stantial axial distance from the objective lens of a telescope, and spaced radially from the axis of the lens. The return inlet directs turbid fluid forwardly away from the objective lens for clearing turbid fluid continuously out of the field of view of the objective lens, thereby enhancing greatly the visi- bility of the operative field for much longer periods of time. The return inlet is positioned near the outer- most protracted position of the treating device so that the flow of fluid is away from the objective lens and also provides for good negative pressure for the return flow of fluid at all positions of the treat- ing device. A pressure sensing device is mounted within the sheath for detecting fluid pressure within the body cavity, and an electric conductor conveys signals indicative of the internal pressure within the body cavity, for safety purposes. Pump devices establish the continuous flow of fluid into and out of the interior of the body cavity via the delivery and return conduits, respectively. A control circuit responds to the signals for de-activating the pump device when the fluid pressure within the body cavity exceeds a predetermined unsafe value of pressure.
399189
Krebs Helmut
Widran Jerrold
Gowling Lafleur Henderson Llp
Krebs Helmut
Widran Jerrold
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