Hollow curved superelastic medical needle and method
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United States of America Patent
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Issued Date -
Jun 15, 2006
app pub date -
Nov 17, 2005
filing date -
Dec 9, 1998
priority date (Note) -
Abandoned
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Abstract
A needle assembly 10 compromising an infusion needle 11 that includes a needle cannula 13 made of a superelastic material such as Nitinol. The needle cannula is cold-worked or heat annealed to produce a preformed bend 16 that can be straightened within passageway 21 of a coaxial outer cannula 12 for introduction into the body of a patient. Upon deployment from the outer cannula, the needle cannula substantially returns to the preformed configuration for the introduction or extraction of materials at areas lateral to the entry path of the needle assembly. The needle assembly can compromise a plurality of needle cannulae than can be variably arranged or configured for attaining a desired infusion pattern.
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