Patent ID: 9283320
Filing Date: 2016-03-15
CPC Classification: A61M,B29C,Y10T

Claim Text:
1. A method of manufacturing a dual-lumen needle, comprising: providing a first single lumen needle with a first metal cannula and a first plastic hub that supports the first metal cannula; providing a monolithic junction part of plastic having three cylindrical openings, first and second of the openings being coaxial and a third opening having an axis that crosses the common axis of the first two openings; providing a second metal cannula whose internal diameter is larger than an inner diameter of the first metal cannula; the second opening being sized and shaped to receive the first plastic hub; coupling the second cannula to the first opening; inserting the first plastic hub in the second opening, including aligning the first metal cannula with the common axis of the first and second openings; the coupling and inserting including aligning the first and second metal cannulas coaxially; the monolithic junction part being configured such that the coupling and inserting form a fluid flow channel joining the third opening for fluid communication with an annular space coaxial with and lying between the first and second metal cannulas that is isolated from a port of the first single lumen needle; and solvent bonding the first plastic hub to the second opening; wherein the providing a second metal cannula includes providing the second metal cannula supported by a second plastic hub, the combination of the second metal cannula and the second plastic hub defining a second single lumen needle with a port configured for attachment to a fluid line, wherein the coupling the second cannula includes inserting the second plastic hub supporting the second cannula in the first opening.