Abstract: A cassette for collection of fluids in a fluid aspirating system which may be reusable after sterilization. The cassette includes vacuum aperture and an aspiration port along the top wall of the cassette. Aspiration tubing is connected to the aspiration port at one end and is seated within an upstanding retainer at the proximal edge of the top wall at the opposite end. Internally, the cassette includes structures to increase flow impedance so that liquid is not drawn into the vacuum port when the fluid level rises. In addition, a pivot mechanism is disposed about a pivot hub within the chamber. A float is disposed on the pivot mechanism at a radius from the pivot hub for intercepting the vacuum port as aspirated fluid fills the chamber. As the fluid level rises, a light path is intercepted by the float to terminate aspiration. However, the float also mates with the vacuum port to close off the flow path. Thus, the system prevents overfilling of the container if the optical detector fails.

Abstract: A fiberscope is constructed with one or more of a pivoted eyepiece, a cannula insertion assembly capable of housing a retractable fiber bundle and/or delivering distention fluid, a disposable sheath and seal assembly and an encasement for a fiber bundle. The distal end of the encased bundle can be advanced or withdrawn from its protective sheath. When advanced, it may be reoriented in direction by means of linkage to structure which can be manipulated from outside the instrument.

Abstract: A low-friction, abrasion-resistant, non-shedding glass fiber light guide and its method of construction. The light guide is particularly suited for endoscopic use in conjunction with other elements which may contact the light guide but must not either damage the guide or be damaged by it. The light guide comprises an elongated bundle of generally parallel glass fibers embedded in a hardened resin matrix, the bundle being ensheathed by a pair of thin protective layers disposed on opposite sides thereof, converging along a pair of side edges, and secured in place by the resinous matrix material. The method for making the light guide involves the steps of lining a mold cavity with a thin film, introducing the glass fibers and a hardenable liquid potting compound into the cavity, covering the exposed fibers and compound with a second film, rearranging the fibers and compound to establish the desired cross-sectional configuration, and then heating the mold and its contents until the resin is cured.

Abstract: An improved surgical instrument having a sheath, a grasping and/or cutting jaw assembly at one end of the sheath, a housing at the sheath's opposite end, and a plunger slidably supported by the housing and connected to the jaw assembly by means of an actuator rod extending through the sheath. The housing and plunger portions of the instrument are adapted to be coupled to a handle unit, if desired, for manipulation of the instrument and operation of the jaw assembly. The structure and method for facilitating quick removal and replacement of the jaw assembly and actuator rod are disclosed.