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US 5,769,795 AGranted
Echogenic needle
OwnerRichard A. Terwilligerinventor
Life of this patent
Estimating the term…
Abstract
An echogenic cannula 7 includes a hole provided at the distal tip end 17. Preferably the hole 5 is positioned through a centerline 8 which is spaced from the centerline 6 of the stylet 7 in order to form a concave surface 11 from which sound waves 10 are reflected in order to locate the distal tip end 17.
Claims18
A cannula for positioning adjacent to tissue to be biopsed comprising:
- a cannula body with an outer surface and a longitudinal centerline;
- a cannula tip located at a distal end of the cannula body for positioning adjacent to tissue to be biopsed;
- an indentation defined at the cannula tip in order to make the cannula echogenic;
- and
- said indentation pierces said outer surface of said cannula body and said indentation is directed into said cannula body away from said outer surface, and along an axis that does not intersect the longitudinal centerline, in order not to impede the movement of the cannula through tissue to be biopsed.
2 more elements
A cannula for positioning adjacent to tissue to be biopsed comprising:
- a cannula body with an outer surface and a longitudinal centerline;
- a cannula tip located at a distal end of the cannula body for positioning adjacent to tissue to be biopsed;
- a hole provided in the cannula body adjacent to the cannula tip in order to make the cannula echogenic;
- and
- said hole pierces through said outer surface of said cannula body and said hole is directed into said cannula body away from said outer surface, and along an axis that does not intersect the longitudinal centerline, in order not to impede the movement of the cannula through tissue to be biopsed.
2 more elements
A cannula for positioning adjacent to tissue to be biopsed comprising:
- a cannula body with an outer surface and a longitudinal centerline;
- a cannula tip located at a distal end of the cannula body for positioning adjacent to tissue to be biopsed;
- an echogenic mark defined at the cannula tip in order to make the cannula tip echogenic;
- and
- said echogenic mark pierces through said outer surface of said cannula body and said echogenic mark is directed into said cannula body away from said outer surface, and along an axis that does not intersect the longitudinal centerline, in order not to impede the movement of the cannula through tissue to be biopsed.
2 more elements
A needle set comprising:
- a cannula having a cannula body with an outer surface and a longitudinal centerline;
- a cannula tip located at a distal end of the cannula body for positioning adjacent to tissue to be biopsed;
- an echogenic mark defined at the cannula tip in order to make the cannula tip echogenic;
- a stylet having a stylet body;
- the cannula having an inner bore which receives the stylet body;
- said stylet positioned in the cannula body preparatory to the needle set addressing tissue to be biopsed with the stylet tip positioned just past the tip of the cannula such that the cannula presents a smooth surface for penetrating the tissue while the echogenic mark allows the tip of the cannula to be tracked;
- and
- said echogenic mark pierces through said outer surface of said cannula body and said echogenic mark is directed into said cannula body away from said outer surface, and along an axis that does not intersect the longitudinal centerline, in order not to impede the movement of the cannula through tissue to be biopsed.
5 more elements
A stylet that can be positioned adjacent to tissue to be biopsed comprising:
- a stylet body with an outer surface;
- a stylet tip located at a distal end of the stylet body adapted to be positioned adjacent to tissues to be biopsed;
- said stylet body has a longitudinal centerline;
- said hole is provided in the stylet body in order to make the stylet echogenic;
- said hole is in the shape of a polygon;
- and
- said hole pierces through said outer surface of said stylet body and said hole is directed into said stylet body away from said outer surface, and along an axis that does not intersect the longitudinal centerline, in order not to impede the movement of the cannula through tissue to be biopsed.
4 more elements
A stylet that can be positioned adjacent to tissues to be biopsed, the stylet comprising:
- a stylet body with an outer surface and a longitudinal centerline;
- a stylet tip located at a distal end of the stylet body adapted to be positioned adjacent to tissues to be biopsed;
- an indentation defined at the stylet tip in order to make the stylet echogenic;
- said indentation being in the shape of a polygon;
- and
- said indentation pierces through said outer surface of said stylet body and said indentation is directed into said stylet body away from said outer surface, and along an axis that does not intersect the longitudinal centerline, in order not to impede the movement of the cannula through tissue to be biopsed.
3 more elements
Dependencies are inferred from the claim text.