Patent ID: 9561129
Date: 2017-02-07
CPC Classifications: A61B,A61F,A61M

Claim:
1. A tissue removal device, comprising: a housing; a rigid aspiration cannula extending from the housing to a distal tip outside the housing; a valve disposed in the housing and configured for communicating with a vacuum source, the valve comprising a valve port communicating with the aspiration cannula in a fluid-sealed manner, wherein an inside diameter of the valve port is equal to or greater than an inside diameter of the distal tip; and a pneumatically-driven actuator configured for moving the valve between an open position and a closed position, wherein: at the open position, the valve port is open wherein the valve defines an aspiration path through the aspiration cannula and the valve; at the closed position, the valve port is closed wherein the valve prevents vacuum from being applied at the distal tip; the valve comprises an inner cannula and an outer cannula coaxially disposed about at least a portion of the inner cannula; the inner cannula is configured for communicating with the vacuum source and is linearly movable by the actuator between the open position and the closed position; the valve port is formed in the outer cannula; at the open position the aspiration path passes through the outer cannula via the valve port and into the inner cannula; and at the closed position the inner cannula blocks the valve port.