Stepped cannula
AssigneeAvigen, Inc., The Regents of the University of California
InventorsKrzysztof Bankiewicz, Jurg Sommer
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Abstract
Described herein are cannulas having a stepped exterior. Also described are methods of making and using these cannulas, for example to deliver one or more materials to the central nervous system of an animal.
Claims24
A stepped cannula having an exterior diameter, a distal end, a proximal end and a lumen extending between the proximal and distal ends, the stepped cannula comprising
- two or more co-axially disposed segments, each segment having an exterior diameter that defines the exterior diameter of the cannula,
- wherein the exterior diameter of the segments is different.
A stepped cannula having an exterior diameter, a distal end, a proximal end and a lumen extending between the proximal and distal ends, the stepped cannula comprising
- two or more co-axially disposed segments, each segment having an exterior diameter that defines the exterior diameter of the cannula, wherein the exterior diameter of the segments is different;
- and
- one or more tubular components extending through the lumen of the cannula.
A stepped cannula having an exterior diameter, a distal end, a proximal end and a lumen extending between the proximal and distal ends, the stepped cannula comprising
- two or more co-axially disposed segments, each segment having an exterior diameter that defines the exterior diameter of the cannula, wherein the exterior diameter of the segments is different;
- and
- one or more tubular components extending through the lumen of the cannula, wherein at least one tubular component comprises fused silica.
Dependencies are inferred from the claim text.