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US 11,413,191 B2Granted
Apparatus for perforation and aspiration of inner ear
AssigneeThe Trustees of Columbia University in the City of New York
InventorsHirobumi Watanabe, Anil K. Lalwani, James P. Stevens, Jeffrey W. Kysar
Life of this patent
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Abstract
An apparatus for controlled perforation and aspiration of the inner ear.
Claims23
An apparatus for penetrating a membrane of an inner ear of a patient comprising:
- a hollow tubular member with an outer diameter of about 0.8 to about 1.1 mm having a proximal portion and a distal portion and a length therebetween,
- wherein the distal portion includes a plurality of alternating apices and valleys to define a plurality of serrated blades, wherein each apex includes a pointed tip at the distalmost end and a tip sharpness with a tip radius of curvature of 2 μm or 4.5 μm and a trailing edge extending proximally from the tip of the apex to the valley and the valleys include an arcuate edged surface disposed between pairs of apices.
An apparatus for penetrating a thin membrane of an inner ear of a patient comprising:
- a tubular member having a proximal portion and a distal portion and a lumen therebetween,
- a plurality of serrated blades at the distal end of the tubular member, the plurality of serrated blades defined by alternating apices and valleys, wherein the apices and the valleys define a continuous ridge, the continuous ridge defining a cutting edge, wherein the tip has a radius of curvature, and further wherein the tip radius of curvature is 2 μm.
An apparatus for penetrating a thin membrane of an inner ear of a patient comprising:
- a tubular member having a proximal portion and a distal portion and a lumen therebetween, a plurality of serrated blades at the distal end of the tubular member, the plurality of serrated blades defined by alternating apices and valleys, wherein the apices and the valleys define a continuous ridge, the continuous ridge defining a cutting edge, wherein the tip has a radius of curvature, and further wherein the radius of curvature is 4.5 μm.
An apparatus for penetrating a membrane of an inner ear of a patient comprising:
- a tubular member having a proximal portion and a distal portion and a lumen therebetween, and
- a plurality of serrated blades at the distal end of the tubular member, the plurality of serrated blades defined by alternating apices and valleys, wherein each apex has a pointed tip and a trailing edge extends proximally from the pointed tip to the valley to form a cutting blade, and further wherein the tubular member includes a bevel angle formed by the apices and the tubular member, wherein the tip has a radius of curvature, and further wherein the tip radius of curvature is 2 μm.
Dependencies are inferred from the claim text.