Ultrasound biopsy needle
First Claim
1. An echogenic medical needle comprising a tubular cannula body having a distal end and a proximal end, a stylet having a distal end and a proximal end, the stylet being received within the cannula body, and an echogenicity enhancement formed on the stylet intermediate the proximal and distal ends thereof, the echogenicity enhancement comprising at least one contoured arcuate element and said at least one contoured element being convex in cross section and reflecting ultrasonic waves at a characteristic different from the cannula body.
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Accused Products
Abstract
An echogenic medical needle is disclosed which comprises a tubular cannula body, a stylet received within the cannula body, and an echogenicity enhancement within the cannula for improved ultrasound imaging. Preferably, the echogenicity enhancement is on the stylet and comprises a series of annular grooves about the stylet.
142 Citations
17 Claims
- 1. An echogenic medical needle comprising a tubular cannula body having a distal end and a proximal end, a stylet having a distal end and a proximal end, the stylet being received within the cannula body, and an echogenicity enhancement formed on the stylet intermediate the proximal and distal ends thereof, the echogenicity enhancement comprising at least one contoured arcuate element and said at least one contoured element being convex in cross section and reflecting ultrasonic waves at a characteristic different from the cannula body.
- 5. An echogenic medical needle comprising a tubular cannula body having a distal end, a proximal end and a longitudinal axis, a stylet having a distal end, a proximal end and a longitudinal axis, the stylet being received within the cannula body, and an echogenicity enhancement formed on one of the stylet and cannula body intermediate the proximal and distal ends thereof, the echogenicity enhancement comprising at least one groove formed in the surface of said one of the stylet and cannula body extending parallel to the longitudinal axis of said one of the stylet and cannula body, said at least one reflecting ultrasonic waves at a characteristic different from the cannula body.
- 10. An echogenic medical needle comprising a tubular cannula body having a distal end and a proximal end, a stylet having a distal end and a proximal end, the stylet being received within the cannula body, and an echogenicity enhancement formed on the stylet intermediate the proximal and distal ends thereof, the echogenicity enhancement provided on the stylet and comprising a plurality of concave elements and at least one convex member intermediate adjacent concave elements, said echogenicity enhancement reflecting ultrasonic waves at a characteristic different from the cannula.
- 15. An echogenic medical needle comprising a tubular cannula body having a distal end and a proximal end, a stylet having a distal end and a proximal end, the stylet being received within the cannula body, and an echogenicity enhancement formed on one of the stylet and cannula body intermediate the proximal and distal ends thereof, the echogenicity enhancement comprising a plurality of substantially planar surfaces provided on a portion of the surface of said one of the stylet and cannula body, the substantially planar surfaces being adapted to reflect ultrasonic waves at a characteristic different from the other of the stylet and cannula body and said portion of said one of the stylet and cannula body being polygonal in cross section.
Specification