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 one of the stylet and cannula body intermediate the proximal and distal ends thereof, the echogenicity enhancement comprising an annular series of contoured elements immediately adjacent one another and repetitively provided on said one of the stylet and cannula body and a series of longitudinal grooves in the surface said one of the stylet and cannula body, the contoured elements being adapted to reflect ultrasonic waves at a characteristic different from the other of the stylet and cannula.
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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.
215 Citations
23 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 one of the stylet and cannula body intermediate the proximal and distal ends thereof, the echogenicity enhancement comprising an annular series of contoured elements immediately adjacent one another and repetitively provided on said one of the stylet and cannula body and a series of longitudinal grooves in the surface said one of the stylet and cannula body, the contoured elements being adapted to reflect ultrasonic waves at a characteristic different from the other of the stylet and cannula.
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9. An echogenic medical needle comprising:
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a tubular cannula body having a proximal end, a distal cutting end, and a smooth outer surface; and an elongated stylet receivable within the cannula body, the stylet having a proximal end and a distal cutting end, the distal cutting end of the stylet conforming to the distal cutting end of the cannula to form a cutting surface; and an echogenicity enhancement within the cannula whereby the echogenicity enhancement is readable by an imaging device using reflected wave energy, the echogenicity enhancement comprising a plurality of annular convex grooves immediately adjacent one another and repetitively provided on the stylet, the grooves being adapted to reflect ultrasonic waves at a characteristic different from the cannula. - View Dependent Claims (10, 11, 12, 13, 14)
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- 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 longitudinally extending surfaces provided on at least a portion of said one of the cannula body and stylet so that said portion is-polygonal in cross section, the longitudinally extending surfaces being adapted to reflect wave energy in a characteristic differently from the other of the stylet and cannula body.
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20. 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 an annular series of contoured elements immediately adjacent one another and repetitively provided on said one of the stylet and cannula body and a roughened, cross hatched surface provided on at least a portion of said one of the stylet, the contoured elements being adapted to reflect ultrasonic waves at a characteristic different from the other of the stylet and cannula.
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21. 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 styler 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 an annular series of contoured elements immediately adjacent one another and repetitively provided on said one of the stylet and cannula body and a length of coiled wire provided on one of the stylet and the catheter body, the contoured elements being adapted to reflect ultrasonic waves at a characteristic different from the other of the stylet and cannula.
- 22. 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 an annular series of contoured elements immediately adjacent one another and repetitively provided on said one of the stylet and cannula body and particles of reflective material bonded to the stylet, the contoured elements being adapted to reflect ultrasonic waves at a characteristic different from the other of the stylet and cannula.
Specification