Multi-directional needle medical device
US6425887B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2000 |
| Grant date | Jul 30, 2002 |
| Priority date | — |
| Expiry date | Dec 8, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/0266
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.