US5615690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tissue core biopsy cannula
Assignee: Boston Scientific Miami Corp
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Filing: 1995-02-15
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Granted: 1997-04-01
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Expires: 2015-02-15
Abstract
Abstract A tissue core biopsy cannula of the present invention includes a distal end which is ground in two planes which intersect each other at a first angle along a line which intersects the longitudinal axis of the cannula at a second angle. This produces a cardioid shaped opening in the distal end of the cannula. The entire edge of the sidewall is thereby inclined inward toward the distal opening and two distal cutting edges are provided. According to the presently preferred embodiment, the first angle at which the two planes intersect is approximately 60° and the second angle at which the intersection of the two planes intersects the longitudinal axis of the cannula is approximately 20°. In order to aid in removal of the biopsy sample from the target tissue site, the cannula according to the invention is provided with side fenestration holes and/or a split end which aids in grasping the tissue so that it can be pulled away from the target tissue site. The cannula according to the invention may be used with a solid stylet or a notched stylet and may be provided as part of a manual or automatic biopsy tool. A preferred stylet for use with the cannula has a distal end which is also ground in two planes like the distal end of the cannula.
Inventors
- 👤 Joel F. Giurtino
- 👤 David Turkel
- 👤 David P. Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:48
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233; A61B10/0266; A61B17/00; A61B17/32; A61B2017/320064
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
60 words
A tissue core biopsy cannula, comprising: a tube member defining a lumen, said tube member having a longitudinal axis and a distal end, said lumen extending proximally from said distal end, said distal end lying in two planes which intersect each other at a first angle along a line, with said line intersecting said longitudinal axis at a second angle.
Claim 2
Dependent Claim
60 words
A tissue core biopsy cannula, comprising: a tube member defining a lumen, said tube member having a longitudinal axis and a distal end, said lumen extending proximally from said distal end, said distal end lying in two planes which intersect each other at a first angle along a line, with said line intersecting said longitudinal axis at a second angle.
Claim 3
Dependent Claim
24 words
A tissue core biopsy cannula according to claim 1, wherein: said distal end of said tube member has an opening with a cardioid shape.
Claim 4
Dependent Claim
15 words
A tissue core biopsy cannula according to claim 1, wherein: said first angle is acute.
Claim 5
Dependent Claim
25 words
A tissue core biopsy cannula according to claim 1, wherein: said first angle is approximately sixty degrees and said second angle is approximately twenty degrees.
Claim 6
Dependent Claim
25 words
A tissue core biopsy cannula according to claim 1, wherein: said tube member is provided with at least one fenestration hole near said distal end.
Claim 7
Dependent Claim
21 words
A tissue core biopsy cannula according to claim 1, wherein: said distal end of said tube member has a longitudinal slit.
Claim 8
Dependent Claim
16 words
A tissue core biopsy cannula according to claim 1, wherein: said tube member is substantially cylindrical.
Claim 9
Dependent Claim
15 words
A tissue core biopsy cannula according to claim 1, wherein: said lumen is substantially cylindrical.
Claim 10
Dependent Claim
25 words
A tissue core biopsy cannula according to claim 4, wherein: said tube member is provided with at least one fenestration hole near said distal end.
Claim 11
Dependent Claim
21 words
A tissue core biopsy cannula according to claim 4, wherein: said distal end of said tube member has a longitudinal slit.
Claim 12
Dependent Claim
16 words
A tissue core biopsy cannula according to claim 4, wherein: said tube member is substantially cylindrical.
Claim 13
Dependent Claim
15 words
A tissue core biopsy cannula according to claim 4, wherein: said lumen is substantially cylindrical.
Claim 14
Dependent Claim
25 words
A tissue core biopsy cannula according to claim 11, wherein: said tube member is provided with at least one fenestration hole near said distal end.
Claim 15
Dependent Claim
21 words
A tissue core biopsy cannula according to claim 11, wherein: said distal end of said tube member has a longitudinal slit.
Claim 16
Dependent Claim
74 words
A tissue core biopsy instrument comprising: a) a cannula having a proximal end and a distal end with a lumen extending therethrough; and b) a handle coupled to said proximal end of said cannula, wherein said cannula has a longitudinal axis and said distal end of said cannula lies in two planes which intersect each other at a first angle along a line, with said line intersecting said longitudinal axis at a second angle.
Claim 17
Dependent Claim
74 words
A tissue core biopsy instrument comprising: a) a cannula having a proximal end and a distal end with a lumen extending therethrough; and b) a handle coupled to said proximal end of said cannula, wherein said cannula has a longitudinal axis and said distal end of said cannula lies in two planes which intersect each other at a first angle along a line, with said line intersecting said longitudinal axis at a second angle.
Claim 18
Dependent Claim
25 words
A tissue core biopsy instrument according to claim 15, wherein: said first angle is approximately sixty degrees and said second angle is approximately twenty degrees.
Claim 19
Dependent Claim
24 words
A tissue core biopsy instrument according to claim 15, wherein: said cannula is provided with at least one fenestration hole near said distal end.
Claim 20
Dependent Claim
20 words
A tissue core biopsy instrument according to claim 15, wherein: said distal end of said cannula has a longitudinal slit.
Claim 21
Dependent Claim
64 words
A tissue core biopsy instrument according to claim 15, further comprising: c) a stylet having a proximal end and a distal end; and d) a stylet handle coupled to said proximal end of said stylet, wherein said stylet is dimensioned such that it is insertable into said lumen, extends through substantially all of said lumen, and substantially occludes the distal end of said lumen.
Claim 22
Dependent Claim
70 words
A tissue core biopsy instrument according to claim 19, wherein: said stylet has a longitudinal axis and said distal end of said stylet lies in two planes which intersect each other at a third angle along a line, with said line intersecting said longitudinal axis at a fourth angle, said third angle being substantially equal to said first angle, and said fourth angle being substantially equal to said second angle.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-03-31 | 2000-09-30 | 2001-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-31 | 2004-09-30 | 2005-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-31 | 2008-09-30 | 2009-04-01 | $7700.00 | Window Closed / Lapsed |