| 摘要 |
<p>The invention relates to an instrument for dilating a cavity, the instrument comprising: (a) a base; (b) a plurality of elongated blades extending generally axially along the instrument, each blade having a proximal end and a distal end and being attached to a flexible resilient material mounted on the base the resilient material forming a hinge so that each blade is movable between a closed position and an open position, so that the body cavity can be opened, each blade additionally comprising proximally to the hinge a radially extending tail; and (c) an actuator, the actuator and base movable relative to one another along the blades, wherein the actuator comprises an engagement portion capable of engaging the radially extending tails to cause the blades to move between the closed position to an open position.</p> |
