Tip for phacoemulsification

• US 9,827,142 B2
• Filed: 05/20/2014
• Issued: 11/28/2017
• Est. Priority Date: 05/28/2013
• Status: Active Grant

• Current Assignee: JMR Co., Ltd.
• Original Assignee: JMR Co., Ltd.
• Inventors: Sasazaki, Atsushi, Oganna, Shinya
• Primary Examiner(s): Yabut, Diane
• Assistant Examiner(s): Herbermann, Erich
• Application Number:
  US14/891,360
• Publication Number:
  US 20160067089A1
• Time in Patent Office: 1,288 Days
• Field of Search: 604 22
• CPC Class Codes: A61F 9/00736 Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments A61F9/008 takes precedence
• CPC Class Codes: A61F 9/00745 using mechanical vibrations, e.g. ultrasonic

Abstract

Provided is a tip for phacoemulsification superior in ability to efficiently and smoothly crush and suck a crystalline lens. A tip (1) of the present invention includes: a shaft (2) having first and second ends (21, 22); a distal part (3) arranged at the first end (21) of the shaft (2) and having an opening (4); and a suction passage (5) extending from the opening (4) of the distal part (3) to the second end (22) of the shaft (2). The suction passage (5) is narrowed in a staircase shape (51) or/and a helical shape (53) from the opening (4) toward the shaft (2). It is preferable that one or a plurality of guide grooves (52) leading from the opening (4) toward the shaft (2) are further formed in an inner wall of the suction passage (5).

Claims

1. A tip for phacoemulsification, comprising:

a shaft having first and second ends;

a distal part arranged at the first end of the shaft and having an opening; and

a suction passage extending from the opening of the distal part to the second end of the shaft,

wherein the suction passage has, at the distal part, a first section provided on the opening side and a second section provided on the first end side of the shaft,

wherein the suction passage is narrowed in a staircase shape toward the shaft, in the first section, and

wherein the suction passage is narrowed in a helical shape toward the shaft, in the second section.

2. The tip for phacoemulsification according to claim 1,

wherein one or a plurality of guide grooves leading from the opening toward the shaft are further formed in an inner wall of the suction passage.

3. A tip for phacoemulsification, comprising:

a shaft having first and second ends;

a distal part arranged at the first end of the shaft and having an opening; and

a suction passage extending from the opening of the distal part to the second end of the shaft,

wherein the suction passage has, at the distal part, a first section provided on the opening side and a second section provided on the first end side of the shaft,

wherein the suction passage is narrowed in a helical shape toward the shaft, in the first section, and

wherein the suction passage is narrowed in a staircase shape toward the shaft, in the second section.

4. The tip for phacoemulsification according to claim 3,

wherein one or a plurality of guide grooves leading from the opening toward the shaft are further formed in an inner wall of the suction passage.