HOLLOW NEEDLE FOR AN OPHTHALMOLOGICAL INSTRUMENT

摘要

Disclosed is a hollow needle for an ophthalmological instrument for in-vivo fragmentation of organic lenses using ultrasound, comprising a connection zone to be coupled to the instrument, and an operating zone (2) which is designed at the free end (1) and has an effective surface (3) for emitting ultrasonic waves. An aspiration duct (4) for aspirating lens fragments is open in the operating zone (2) and extends through the hollow needle. The opening (5) of said aspiration duct (4) is formed or delimited by the effective surface (3). The disclosed hollow needle is characterized in that at least one effective element (6) which at least slightly extends into the aspiration duct (4) is provided in the operating zone (2).