University of California

Edward Q Yavitz

Steven G Kramer

A surgical instrument in the form of a template comprises at least one slit formed therethrough to guide either pivotal or dragging cutting movement of a surgical blade of a scalpel therein. The instrument is preferably fixedly held, by suction, over a body area to be incised. In one embodiment, the scalpel is pivotally mounted adjacent to the slit for arcuate movement about a fixed pivot to ensure accurate and reproducible incisions. In a second embodiment, grooves are formed alongside the slit to guide dragging movement of the blade. The instrument is particularly adapted for radial keratotomy wherein a plurality of radially extending and circumferentially spaced slits are formed through the instrument. The surgical blade can be adapted for adjustment, on an angularly offset handle secured thereto, to selectively vary the depth of the incision.

Ophthalmologic surgical instrument

A liquid dispenser comprises a container defining a liquid retaining chamber therein and at least one dispensing port defined through an upper end of the dispenser for providing the sole dispensing outlet for liquid from the chamber. A hydrophobic and microporous anti-bacterial filter is secured over the port to provide a barrier to the ingress of bacteria and particulate matter therethrough and for permitting the egress of sterile liquid therethrough. The dispenser is preferably constructed at its upper end to coalesce the liquid into droplet form upon dispensing thereof.

Medicine drop dispenser with anti-bacterial filter

An internally sterile pulsatile infusor system comprises an elastic reservoir or bulb connected to a closed, sterile source of a liquid infusion solution. A check valve is connected between the source and bulb to prevent reflux of the solution therepast and a reciprocating piston is arranged to intermittently compress the bulb to create a pulsating discharge of solution through a cannula. In the preferred embodiment of this invention, controls are provided to vary the rate of compressions of the bulb and to also modulate the force of the pulsating discharge through the cannula. The pulsatile infusor system is useful in many areas in the fields of medicine and surgery, including extracapsular cataract extraction and intravenous infusion procedures wherein bloodclots and like blockages must be removed from the cannula.

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San Francisco, CA, United States of America

Edward Q Yavitz