FLEXIBLE BIOPSY NEEDLE

摘要

An endoscopic tissue-sampling needle includes an elongate needle shaft having a proximal and a distal shaft portion. The proximal shaft portion includes an inner tubular core that may be constructed of a same material as the distal shaft potion, having a longer length and a smaller outer diameter than the distal shaft portion. The distal shaft portion extends into and is fixedly attached to an inner diameter of a distal shaft portion lumen. The distal shaft portion lumen is configured for collection of patient tissue, with a distal penetrating tip and/or a side aperture with a cutting edge configured to excise tissue from a target site in a patient body. The proximal shaft portion includes polymer coating around the inner tubular core, which is configured to provide an outer diameter for the proximal shaft portion that may be substantially the same as the outer diameter of the distal shaft portion.

主权项

1. An endoscopic tissue-sampling needle, comprising:
an elongate tubular needle shaft having a proximal shaft portion and a distal shaft portion; wherein the distal shaft portion comprises a shorter length than the proximal shaft portion; wherein a length of the proximal shaft portion comprises a non-metallic polymeric material length disposed immediately proximally adjacent of and securely fixed to the distal shaft portion, said non-metallic polymeric material length comprising a greater flexibility than the distal shaft portion; wherein the distal shaft portion
comprises a metallic material; andis configured for collection of patient tissue; further comprising a metallic tube length disposed immediately proximally adjacent of and securely fixed to the non-metallic polymeric material length, separating the non-metallic polymeric material length distally apart from a handle member; wherein the elongate tubular needle shaft is configured and dimensioned for passage through a working channel of an endoscope to a target site within a patient body; and wherein the proximal shaft portion includes a proximal shaft lumen, the distal shaft portion includes a distal shaft lumen, and the proximal and distal shaft lumens together provide a continuous shaft lumen.