Title:
MEDICAL KNIFE
Document Type and Number:
WIPO Patent Application WO/2012/029688
Kind Code:
A1
Abstract:
[Problem] Because the knife edge of medical knives such as straight knives manufactured with austenite stainless steel is thin and sharp, there is the problem that the knife edge bends too easily when making incisions in the cornea, sclera, etc. during ophthalmologic surgery. The invention provides a medical knife capable of increasing the strength of the thin, sharp knife edge and preventing the reduction of sharpness. [Solution] This medical knife has a flat cutting part and an inclined surface formed along the border of said cutting part. By electrolytic polishing or chemical polishing of the inclined surface, a convexly curved cutting edge is formed on at least the edge of the inclined surface of the knife. The knife edge has a rounded configuration. The knife edge being rounded increases the thickness of the knife edge, increases the strength thereof and hinders bending.
Inventors:
SAITO MASAHIKO (JP)
Application Number:
PCT/JP2011/069389
Publication Date:
March 08, 2012
Filing Date:
August 29, 2011
Export Citation:
Assignee:
MANI INC (JP)
SAITO MASAHIKO (JP)
SAITO MASAHIKO (JP)
International Classes:
A61B17/3211; A61F9/007
Domestic Patent References:
| WO2008136410A1 | 2008-11-13 |
Foreign References:
| US20060212059A1 | 2006-09-21 | |||
| JP2002065720A | 2002-03-05 | |||
| JPH09327464A | 1997-12-22 | |||
| JPH07289559A | 1995-11-07 | |||
| JP2003116866A | 2003-04-22 | |||
| JP3140508B2 | 2001-03-05 | |||
| JPH08238245A | 1996-09-17 |
Other References:
See also references of EP 2612610A4
Attorney, Agent or Firm:
NAKAKURA, Kazuhiko (JP)
Kazuhiko Nakakura (JP)
Kazuhiko Nakakura (JP)
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Claims:
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