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EP0682915A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Biopsy needles

Assignee: HAKKO MEDICAL CO Ltd
•
Filing: 1994-05-25
•
Granted: —
•
Expires: 2014-05-25
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Abstract

Abstract The set of biopsy needles of the invention is provided with a shaft member for an inner needle 6 which has an inner needle base 22 at the front end to fix an inner needle 24, a shaft member for an outer needle 13 which has an outer needle base 21 at the front end to fix an outer needle 23, a gripping member 1 for operation which fixes the shaft member for the inner needle 6 and axially movably support the shaft for the outer needle 13, a actuating member 9 which gives protrusion force to the shaft member for the outer needle 13, a holding member 15 which holds the shaft member for the outer needle 13 at the position before protrusion against the protrusion force of the actuating member 9 and releases from holding the shaft member for the outer needle 13 before protrusion by outside operation, and a rotation generating member 10 which gives rotation force to the shaft member for the outer needle 13 when the shaft member for the outer needle 13 moves axially.

Inventors

  • 👤 Masao Ohto
  • 👤 Takefumi Fuji-Daiichi-View-Heights 103 Daido
  • 👤 Chikara Nakao
  • 👤 Tetsuo Sekine
  • 👤 Masaru Hakko Electric Machine Maruyama

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-23 05:15
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 294 words
A set of biopsy needles comprising double needles composed of an outer needle in the form of a hollow tube and an inner needle to be inserted into said outer needle, which is punctured into an predetermined part in a human body and thereafter said outer needle is pushed forward to protrude from the tip of said inner needle whereby a piece of tissue in said part can be collected inside the tip of said outer needle, characterized in comprising: a shaft member for said inner needle which has a needle base to fix said inner needle at the tip; a shaft member for said outer needle which is located at the circumference of said shaft member for the inner needle and has a needle base to fix said outer needle at the tip; a gripping member for operation which is located at the circumference of said shaft member for the outer needle and fixes said shaft member for the inner needle and supports axially movably said shaft member for the outer needle; a actuating member which gives protrusion force to said shaft member for the outer member so that said outer needle can protrude from the tip of said inner needle; a holding means which holds said shaft member for the outer needle at the position before protrusion against said protrusion force of said actuating member and releases said shaft member for the outer needle from said holding before protrusion by outside operation; and a rotation generating means which gives rotation force to said shaft member for the outer needle to protrude said outer needle from the tip of said inner needle while being rotated when said shaft member for the outer needle moves axially by said protrusion force of said actuating member.
Claim 2
Dependent Claim 83 words
The set of biopsy needles according to claim 1, wherein said holding means comprises: a first circular magnetic plate which is fixed to the circumference of said shaft member for the outer needle and can be rotated by said outside operation; a second circular magnetic plate which is fixed at a predetermined position inside said main body tube; and each of said first and second circular magnetic plate is circumferentially provided with a plurality of N and S poles which are located alternately.
Claim 3
Dependent Claim 52 words
The set of biopsy needles according to claim 1, wherein said rotation generating means comprises: a guide pin which is attached inside said gripping member for operation; and a spiral groove which is formed on the circumference of said shaft member for the outer needle and is engaged with said guide pin.

References Cited (Backward Citations)

DE1117258B Cited
US3929123A Cited
DE2435123A1 Cited
EP0390528A1 Cited

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