Patent ID: 9480464
Filing Date: 2016-11-01
CPC Classification: A61B

Claim Text:
1. A tissue collection system comprising: an outer housing having opposed distal and proximal ends, wherein said distal end is provided with an inlet passage; a first cylindrical fenestrated member within and immovable relative to said outer housing, wherein an outer tissue collection chamber is defined between said outer housing and said first cylindrical fenestrated member; a second cylindrical fenestrated member defining an inner tissue collection chamber and being positioned within and rotatable relative to said first cylindrical fenestrated member between an open position in which the fenestrations of said first cylindrical fenestrated member and the fenestrations of said second cylindrical fenestrated member are in registration with one another, thereby permitting fluid communication between the inner tissue collection chamber and the outer tissue collection chamber, and a closed position in which the fenestrations of said first cylindrical fenestrated member and the fenestrations of said second cylindrical fenestrated member are not in registration with one another, thereby preventing fluid communication between the inner tissue collection chamber and the outer tissue collection chamber; a plunger axially movable within said second cylindrical fenestrated member between an advanced position near the distal end of said outer housing and a retracted position near the proximal end of said outer housing, said plunger being rotatable to move said second cylindrical fenestrated member between the open and closed positions; an elongate rod being connected to said plunger to move said plunger axially between the advanced and retracted positions, and extending through the proximal end of said outer housing, wherein said elongate rod comprises a plurality of longitudinally-extending ribs; and one or more stop units attached to the interior surface of said outer housing, extending into the outer tissue collection chamber, and wherein at least one of said one or more stop units is positioned to engage said ribs, wherein at least a portion of at least one of said one or more stop units is positioned proximal to said first and second cylindrical fenestrated members to limit axial movement of said first and second cylindrical fenestrated members to positions proximal of the at least one of said one or more stop units, and wherein rotation of said rod and said plunger rotates said second cylindrical fenestrated member between the open and closed positions, and wherein at least one of said one or more stop units engage at least one of said ribs at the open position and at the closed position.