ニードルの製造方法およびニードル

Japanese Patent JP4384974

B2

A method is provided for forming a feature on a needle. In particular, a hollow, metal cannula (10) has a first end, a second end and a substantially constant outer diameter extending over at least a portion of its length. An annular metal sleeve (40) is provided that has a proximal shoulder and a distal shoulder. The length of the annular sleeve is less than the length of the constant diameter portion of the cannula. The sleeve has an inner diameter approximately equal to or less than the outer diameter of the constant diameter portion of the cannula. Two edges extend axially along the length of the sleeve, from the proximal shoulder to the distal shoulder, thereby defining a slit. The sleeve is positioned on the cannula at the constant outer diameter portion in an interference fit. An additional mechanical junction is provided to secure the sleeve to the cannula. For example, the sleeve may be welded to the cannula using a laser welder at at least one edge of the sleeve near one of either the proximal face or the distal face. Alternatively and additionally, the sleeve may be crimped or glued to the cannula. In accord with another aspect of this invention, a needle is provided made in accord with this method.

WO/1992/006733	PERCUTANEOUS TRANSSEPTAL LEFT ATRIAL CANNULATION SYSTEM
WO/2017/047241	CATHETER
JPH06506019	[Title of Invention] Lubricating Polymer Network

Chad Michael Adams

JP2004500953A

December 16, 2009

April 24, 2003

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BECTON, DICKINSON AND COMPANY

A61M25/08; A61M5/32; A61M25/00; B21C37/08; B21G1/08

JP9117504A
JP10118005A
JP57054208B1
JP2182334A
JP2002325847A
JP5345032A
JP55142106U

DE212423A1
WO2001068174A1
DE2825346A
US4846811

Yoshikazu Tani
Kazuo Abe

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