MANDRIN OF MEDICAL ANESTHETIC NEEDLE AND METHOD OF MANUFACTURING SAME

Title:

MANDRIN OF MEDICAL ANESTHETIC NEEDLE AND METHOD OF MANUFACTURING SAME

Document Type and Number:

WIPO Patent Application WO/1999/004843

Kind Code:

A1

Abstract:

A medical anesthetic needle which comprises an outside needle (2) and a mandrin (3) inserted into the outer needle to freely move in and out, and is slightly bent upward at its tip when its needle axis is positioned horizontal. The mandrin (3) is manufactured by a first step of cutting the tip end of a metallic wire (W) such as stainless steel wires obliquely to form a blade surface (5) which intersects the axis at a predetermined angle of the mandrin blade surface, a second step of cutting off that portion of the metallic wire, which extends from the underside of the wire up to a horizontal plane (M) located at a higher level than the center line of the wire, in a columnar region between the upper end (A) of the blade surface (5) and a position (B) rearwardly distant three times the diameter of the wire or more from the upper end, to form a blade tip (11), a split-columnar connection (10) succeeding the blade tip, and a columnar portion (12) succeeding the connection, and a third step of bending the connection (10) in such a manner that the upper end (A) of the blade surface (5) becomes higher a predetermined distance (h) than the upper surface of the columnar portion (12) and the axis of the blade tip (11) is inclined at a predetermined angle ($g(u)) relative to the horizontal, and cutting the entire length of the mandrin into a predetermined length (L).

Inventors:

HIGUCHI AKIO (JP)
HYUGAJI HAYATO (JP)

Application Number:

PCT/JP1997/002595

Publication Date:

February 04, 1999

Filing Date:

July 28, 1997

Export Citation:

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Assignee:

SOKEN KK (JP)
HIGUCHI AKIO (JP)
HYUGAJI HAYATO (JP)

International Classes:

A61B17/34; A61M25/06; A61M25/16; (IPC1-7): A61M19/00; A61M25/06

Foreign References:

JPH05269205A	1993-10-19
JPS5951862A	1984-03-26

Other References: