Ultrasonic needle with sleeve that includes a baffle

• US 5,151,084 A
• Filed: 07/29/1991
• Issued: 09/29/1992
• Est. Priority Date: 07/29/1991
• Status: Expired due to Fees

• Current Assignee: Misonix Incorporated (Smith & Nephew PLC)
• Original Assignee: Fibra-Sonics, Inc.
• Inventors: Khek, Sokhuom
• Primary Examiner(s): Pellgrino, Stephen C.
• Assistant Examiner(s): Dawson, Glenn K.
• Application Number:
  US07/737,424
• Time in Patent Office: 428 Days
• Field of Search: 604/19, 604/22, 604/48, 604/54, 606/107, 606/166, 606/169, 606/170, 606/171, 128/43, 128/35, 128/305, 128/24 AA, 128/749-754
• US Class Current: 604/22
• CPC Class Codes: A61B 17/320068 using mechanical vibrations, e.g. ultrasonic A61B17/22012 takes precedence; dental tooth drilling devices operated by vibration A61C3/03; removing intra-ocular material using mechanical vibrations A61F9/00745
• CPC Class Codes: A61B 2017/320084 Irrigation sleeves
• CPC Class Codes: A61B 2217/007 with irrigation system
• CPC Class Codes: A61M 3/0279 Cannula; Nozzles; Tips; their connection means
• CPC Class Codes: Y10S 604/902 Suction wands

Abstract

A baffle with holes formed therein is mounted in a sleeve which surrounds the needle of an ultrasonic handpiece so as to reduce bubbles in the irrigation fluid supplied to the handpiece and thus improve the visibility at the operating site. As irrigation fluid is supplied to the handpiece, it contacts the ultrasonic motor which tends to cause bubbles and by providing the baffle with openings, the bubbles are restricted from passing the baffle and obstructing the vision of the surgeon using the ultrasonic handpiece.

Claims

1. An ultrasonic handpiece for performing operations comprising, an ultrasonic motor mounted in said handpiece, a tubular portion extending from said ultrasonic motor, a hollow needle attached to an end of said tubular portion, a conical portion of said ultrasonic handpiece extending around said tubular portion and a first cavity formed therebetween, an irrigating tube connected to said conical portion and supplying irrigating fluid to said first cavity, a flexible sleeve connected to an end of said conical portion and extending around said needle, a second cavity formed between said sleeve and said needle and fluidly connected to said first cavity, a planar baffle mounted in and across said sleeve and formed with a plurality of equally spaced openings which extend in a direction parallel to said needle, a third cavity formed between said sleeve and said needle and said second and third cavities in fluid communication through said plurality of said openings in said planar baffle, and an outlet opening formed in said sleeve and in fluid communication with said third cavity, said planar baffle mounted so that its plane extends in a direction which is 90 degrees to said needle, wherein suction is applied to said tubular portion for aspiration, and wherein a shoulder is formed at the junction of said tubular portion and said ultrasonic motor.