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Hollow needles for ophthalmic surgical instruments

A technology of ophthalmic surgery and hollow needle, applied in the field of hollow needle, can solve the problems of blocked suction channel, slowness, etc.

Active Publication Date: 2020-07-03
GEUDER AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another difficulty is that generally hollow needles sometimes aspirate larger lens debris which then blocks the suction channel in which to crush the larger lens debris will be very slow

Method used

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  • Hollow needles for ophthalmic surgical instruments
  • Hollow needles for ophthalmic surgical instruments
  • Hollow needles for ophthalmic surgical instruments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] figure 1 A schematic diagram showing a first embodiment of a hollow needle for an ophthalmic surgical instrument for breaking an organic lens in vivo by ultrasonic waves according to the present invention. The hollow needle comprises a connection zone 2 formed on a proximal end 1 for connection with the instrument (not shown in the drawings); and a needle 4 formed on a distal end 3 . The needle 4 has an active surface 5 for transmitting ultrasound. A suction channel 6 for suctioning lens fragments extends in the axial direction through the hollow needle, the opening 7 of which suction channel is delimited by the active surface 5 . In this embodiment, the suction channel 6 extends coaxially to the axis of symmetry of the hollow needle.

[0032] The suction channel 6 inside the needle 4 is formed as a cone extending at least partially in the direction of the proximal end. The wall 10 of the suction channel 6 comprises a plurality of sections 9 extending axially around ...

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Abstract

The invention relates to a hollow needle for an ophthalmic surgical instrument for fragmenting an organic lens in vivo by means of ultrasound, said hollow needle comprising a connection zone (2) formed on a proximal end (1) to which said instrument is connected ); and a needle (4) formed on the distal end (3) and having an effective surface (5) for sending ultrasonic waves, wherein the suction channel (6) for suctioning lens fragments extends through the axial direction Through the hollow needle, the opening of the suction channel is defined by the effective surface (5), characterized in that the suction channel in the needle (4) is formed at least partially in the The proximal end (1) is tapered and is formed on the wall (10) of the suction channel with axially extending portions (9) surrounding the entire area (1).

Description

technical field [0001] The present invention relates to a hollow needle for use in an ophthalmic surgical instrument for fragmenting an organic lens in vivo by ultrasound, the hollow needle comprising a connection zone formed on a proximal end connected to the instrument; and formed On the distal end there is a needle with an active surface for transmitting ultrasound waves, wherein a suction channel for suctioning lens fragments extends through the hollow needle in the axial direction, the opening of which is defined by the The above effective surface limits. Background technique [0002] The practical use of hollow needles of the type described above has been known for many years. Document US 6,074,396A discloses such a hollow needle. The aspiration channel within the needle is designed to have a graded structure where at least some of these grades have prismatic sections to enhance fragmentation of the lens body. [0003] Furthermore, document DE 196 46 881 C1 shows a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F9/007
CPCA61F9/00745A61B2217/005
Inventor 马克·沃申道夫斯蒂芬·恩格尔D·弗劳恩菲尔德R·德拉海姆V·盖德
Owner GEUDER AG