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 a plurality of longitudinal flat surfaces provided on and extending longitudinally along the surface of said one of the stylet and cannula body, the longitudinal flat surfaces being adapted to reflect ultrasonic waves at a characteristic different from the other of the stylet and cannula body, wherein said portion of said one of the stylet and cannula body is polygonal in cross section.
Parent Case Info
This is a continuation of application Ser. No. 08/573,466, filed Dec. 15, 1995 now abandoned which is a continuation of application Ser. No. 08/291,342, filed Aug. 16, 1994, now issued Feb. 13, 1996 as U.S. Pat. No. 5,490,521 which is a continuation of application Ser. No. 08/115,155, filed Aug. 31, 1993, now abandoned.
US Referenced Citations (14)
Foreign Referenced Citations (1)
Number |
Date |
Country |
24 25 724 |
Dec 1975 |
DEX |
Non-Patent Literature Citations (6)
Entry |
"Echotip.RTM. Needles, Improved Visibility for Ultrasound," Cook Co., date unknown. |
"Westcott.RTM. Biopsy Needle, The Safety of Fine Needle Biopsy . . . Plus Larger Sample Size," Becton Dickinson, 1991. |
"Ultra-vue.TM. Needles, Creates an Unmistakable `Signature` Under Ultrasound," Becton Dickinson, 1991. |
"SampleMASTER.TM., Inrad.RTM. A Division of DLP,Inc.," Copyright 1992. |
"Ghiatas.TM. Beaded Breast Localization Wire," p. 15, Inrad 1992 Product Catalog, 1992. |
"Coaxial Biopsy Needle Set, Directions for Use," Inrad, A Division of DLP, Inc., Copyright 1991. |
Continuations (3)
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Number |
Date |
Country |
Parent |
573466 |
Dec 1995 |
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Parent |
291342 |
Aug 1994 |
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Parent |
115155 |
May 1993 |
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