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US 6,283,924 B1Granted
Endoscopic biopsy forceps
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorTeruo Ouchi
Life of this patent
Estimating the term…
Abstract
Endoscopic biopsy forceps with which the tissue to be analyzed by biopsy can be severed positively to the last bit so that a specimen of the tissue can be collected with minimum occurrence of bleeding. The opposed open ends of two forceps cups are made slightly different in size so that when the two forceps cups are closed, the open end of one forceps cup rests into the open end of the other forceps cup.
Claims10
An endoscopic biopsy forceps, comprising:
- a sheath that is at least one of insertable into and removable from a forceps channel of an endoscope;
- a manipulating wire that extends through said sheath;
- a pair of forceps cups provided at a distal end of said sheath and which are driven to at least one of open and close like beaks by at least one of advancing and retracting said manipulating wire in an axial direction thereof, an entire periphery of a first forceps cup, of said pair of forceps cups, forming a severing edge that slidingly contacts an inside surface of a second forceps cup, of said pair of forceps cups, so that when said pair of forceps cups are closed, a portion of a tissue sample is sharply cut by said severing edge.
An endoscopic biopsy forceps, comprising:
- a sheath that is at least one of insertable into and removable from a forceps channel of an endoscope;
- a manipulating wire that extends through said sheath;
- a pair of forceps cups provided at a distal end of said sheath and which are driven to at least one of open and close like beaks by at least one of advancing and retracting said manipulating wire in an axial direction thereof, an entire periphery of a first forceps cup and a second forceps cup of said pair of forceps cups forming tissue severing edges which are slightly different in size, such that when said pair of forceps cups are closed, a tissue severing edge of said first forceps cup rests into a tissue severing edge of said second forceps cup.
A tip activation portion for an endoscopic forceps, comprising:
- a link mechanism having a support shaft;
- first forceps cup;
- and
- second forceps cup, said first forceps cup and said second forceps cup being coupled to said link mechanism and pivotable about said support shaft, each of said first forceps cup and said second forceps cup having a convex outside surface and a concave inside surface, a boundary connecting said outside surface and said inside surface presenting a cup shape, an entire periphery of said boundary forming a tissue severing edge that is brought into contact with said inside surface of said second forceps cup when said endoscopic forceps are closed.
1 more element
A tip activation portion for an endoscopic forceps, comprising:
- a link mechanism having a support shaft;
- first forceps cup;
- and
- second forceps cup, said first forceps cup and said second forceps cup being coupled to said link mechanism and pivotable about said support shaft, each of said first forceps cup and said second forceps cup having a convex outside surface and a concave inside surface, a boundary connecting said outside surface and said inside surface presenting a cup shape, an entire periphery of said boundary of said first forceps cup and said second forceps cup forming a tissue severing edge, said tissue severing edge of said first forceps cup being radially offset from said tissue severing edge of said second forceps cup when said endoscopic forceps are closed.
1 more element
Dependencies are inferred from the claim text.