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1. WO2020201884 - OUTIL D’EXTRACTION DE LENTICULE CORNÉENNE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

WHAT IS CLAIMED IS:

1. A tool for removing a lenticule tissue from a cornea of a patient, comprising:

an elongated body having an internal air channel; and

an elongated tip extending from the body and having an internal air channel in air communication with the air channel of the body,

wherein the tip has a straight portion which extends from the body and a curved portion at a distal end of the tip, an orientation of the curved portion and an orientation of the straight portion forming an angle between 120 to 150 degrees, and

wherein the tip has one or more orifices disposed on a side of the curved portion, the orifices facing a direction that lies within a plane that contains the curved portion and the straight portion, the curved portion being free of any orifices that face a direction perpendicular to the plane that contains the curved portion and the straight portion.

2. The tool of claim 1 , wherein the curved portion is convex toward the straight portion and has a curvature of approximately 7.5 mm radius.

3. The tool of claim 1 , wherein the body includes a vacuum source for generating a negative pressure in the internal air channel of the body.

4. The tool of claim 1 , wherein the body is adapted to be connected to a vacuum source for generating a negative pressure in the internal air channel of the body.

5. The tool of claim 4, wherein the body further includes an orifice in air communication with the internal air channel of the body.

6. The tool of claim 1 , wherein the orifices have a round shape, or an oval shape, or a shape of a rectangle with two semicircular ends, or a key slot shape.

7. The tool of claim 1 , wherein a total area of the one or more orifices is greater than a cross-sectional area of the internal channel of the tip.

8. The tool of claim 1 , further comprising one or more flexible skirts each disposed around one of the orifices.

9. A tool for removing a lenticule tissue from a cornea of a patient, comprising:

an elongated body, the body having an internal air channel and a mechanism for generating a negative pressure in the internal air channel, the mechanism including a flexible and resilient diaphragm on the body; and

an elongated tip extending from the body and having an internal air channel in air communication with the air channel of the body,

wherein the tip has a straight portion which extends from the body and a curved portion at a distal end of the tip, an orientation of the curved portion and an orientation of the straight portion forming an angle between 120 to 150 degrees, and

wherein the tip has one or more orifices disposed on a side of the curved portion and in air communication with the internal air channel of the tip, the orifices facing a direction that lies within a plane that contains the curved portion and the straight portion.

10. The tool of claim 9, wherein the curved portion is convex toward the straight portion and has a curvature of approximately 7.5 mm radius.

1 1. The tool of claim 9, wherein the orifices have a round shape, or an oval shape, or a shape of a rectangle with two semicircular ends, or a key slot shape.

12. The tool of claim 9, wherein a total area of the one or more orifices is greater than a cross-sectional area of the internal channel of the tip.

13. The tool of claim 9, further comprising one or more flexible skirts each disposed around one of the orifices.

14. A tool for removing a lenticule tissue from a cornea of a patient, comprising:

an elongated body having an internal air channel;

an elongated tip extending from the body and having an internal air channel in air communication with the air channel of the body,

wherein the tip has a first portion which extends from the body and a second portion at a distal end of the tip, an orientation of the second portion and an orientation of the first portion forming an angle between 120 to 150 degrees, and

wherein the second portion of the tip has one or more orifices in air communication with the internal air channel of the tip; and

one or more flexible skirts each disposed around one of the orifices.

15. The tool of claim 14, wherein the one or more orifices include a single orifice formed by and end opening of the tip.

16. The tool of claim 14, wherein the flexible skirt has a cup shape, or an off-centered cup shape, or a shape of a part of a half cylinder, or an elongated bowl shape.

17. A tool for removing a lenticule tissue from a cornea of a patient, comprising:

an elongated body having an internal air channel; and

an elongated tip extending from the body and having an internal air channel in air communication with the air channel of the body,

wherein the tip has a first portion which extends from the body and a second portion at a distal end of the tip, an orientation of the second portion and an orientation of the first portion forming an angle between 120 to 150 degrees,

wherein the second portion of the tip include one or more orifices in air communication with the internal air channel of the tip, and an obstruction inside the orifice, the obstruction including one or more of: a rib, a cross, a mesh, and a disk with slits.

18. The tool of claim 17, wherein the one or more orifices include a single orifice formed by and end opening of the tip.

19. The tool of claim 17, further comprising one or more flexible skirts each disposed around one of the orifices.