Multi-directional needle medical device
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United States of America Patent
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-
Jul 30, 2002
Grant Date -
N/A
app pub date -
Sep 22, 2000
filing date -
Dec 9, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A needle assembly (70) comprising an infusion needle (11) that includes a plurality of needle cannulae (13) made of a superelastic material such as nitinol. The needle cannulae are cold-worked or heat annealed to produce preformed bends (16) that can be straightened with in passageway (21) of a coaxial outer cannula (12) for introduction into the body of a patient. Upon deployment from the outer cannula, the needle cannulae substantially return to their preformed configurations for the introduction or extraction of materials at areas lateral to the entry path of the needle assembly. The plurality of needle cannulae (13) can be variably arranged or configured for their distal tip portions to attain a desired infusion pattern such as an umbrella shaped array (75), and/or be staggered axially.
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