Baxter International Inc.

Jan L Como

Terrence W Snyder

T Michael Dennehey

Gregory D Volan

John R Byrne

Stephen Kuehn

David A Winchell, Deceased

A bone marrow biopsy needle assembly includes an elongated tubular cannula having an axially extending lumen therethrough, and a cannula handle attached to the proximal end of the cannula, the cannula handle extending transversely to the axis of the cannula and having a cavity aligned with and open to the proximal end of the cannula. The handle is provided with a cover connected to the cannula by means of a living hinge. A stylet having a knob affixed to its proximal end which knob is sized to fit within the cavity with the stylet slidably received within the cannula lumen. The cavity is provided with projections that engage the knob to prevent relative rotation between the stylet and the cannula. A guide is provided to facilitate insertion of a stylet into the cannula for sample removal.

Biopsy needle assembly

A bone biopsy needle assembly includes an elongated tubular cannula having an axially extending lumen therethrough. A guide is provided to facilitate insertion of a probe into the cannula for sample removal. The guide has a molded shape with an elongated dimension having first and second ends. A cylindrical opening extends through the length of the elongated dimension and has a diameter substantially equal to that of the interior lumen of the cannula. A flared outward enlargement of the cylindrical opening at each of the first and second ends provides for easy alignment of one of the ends with the distal end of the cannula and the other end forms a guide for insertion of a probe into the distal end of the cannula for removal of the biopsy specimen.

Biopsy needle assembly and guide

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Palatine, IL, United States of America

Jan L Como