Retractable instrument
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United States of America Patent
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Sep 12, 2023
Grant Date -
Dec 24, 2020
app pub date -
Jun 17, 2020
filing date -
Jun 24, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
A cannula assembly having a retractable cannula tip for use in ophthalmic surgical procedures is disclosed. The apparatus may include a housing having a valve bay disposed between its proximal and distal ends, and a cannula assembly, including an inner and outer tube, that extends from the distal end of the housing. The inner tube may include an elongated portion with a cannula tip at its distal end. The apparatus may further include a valve disposed in the valve bay of the housing. The valve may comprise a valve tubular for adjusting flow through the inner tube, and an actuator for moving the cannula tip from an extended position to a retracted position in the outer tube. The valve tubular may provide a biasing force to the inner tube in the retracted position to move the inner tube back to the extended position upon release of the actuator.
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