METHOD OF PRODUCING TAPERED OR POINTED CANNULA.

摘要

A method of producing a tubular device is provided. The method comprises providing atubular stock (24) having an axial passage, heating the tubular stock (24) at afirst heating location to form a softened section, the softened section (104) separatinga workpiece portion of the tubular stock from a remaining portion of the tubularstock (24), and drawing the workpiece portion away from the remaining portionto elongate the softened section (104) and separate the workpiece portion fromthe remaining portion to form the tubular device. The drawing is performed ata rate such that the tubular device has an axial passage having a substantially uniforminside diameter, and an end of the tubular device formed from the elongated softenedsection (104) is tapered.