Phaco tip with fluid bypass port
US6398754B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2000 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Oct 5, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/320084
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Phaco tip apparatus for a phacoemulsification/irrigation and aspiration handpiece having an ultrasonic drive assembly includes a needle having a tip for emulsifying a cataractic lens and a lumen for aspirating emulsified lens. A compressible sleeve establishes an annular passage around the needle and enables irrigation fluid to pass into an eye through a cornea/sclera wound while cooling the needle. The compressible sleeve includes a wall configuration for controlling compression of the sleeve in order to cause the compressible sleeve to shape and conform to the cornea/sclera wound and limit fluid egress from the wound. A bypass port, disposed in said needle and under said compressible sleeve, establishes fluid communication between the lumen and the annular passage in order to enable irrigation fluid to pass into said lumen upon clogging of the tip, thus providing fluid surge protection. A depending member disposed within said compressible sleeve limits compression of opposing walls of said compressible sleeve in order to prevent contact of said compressible sleeve with the needle, maintain the annular passage flow of irrigation fluid past the needle and prevent the compressible s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.