US5394887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biopsy needle
Assignee: Individual
•
Filing: 1994-01-14
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Granted: 1995-03-07
•
Expires: 2014-01-14
Abstract
Abstract A stylet for a biopsy needle is provided with a specimen recess inwardly of the distal end thereof which has a bottom wall parallel to the axis of the stylet and distal and proximal end walls which are reentrant relative to the distal end and proximal position of the stylet, respectively.
Inventors
- 👤 John R. Haaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:23
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233; A61B10/0266; A61B10/0275
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
189 words
In a biopsy needle for taking a biopsy specimen from a site in a patient comprising an outer tubular cannula having an axis, an inner tubular cannula coaxial with and relatively displaceably received in said outer cannula, and a styler coaxial with and relatively displaceably received in said inner cannula, said stylet having an outer surface, a distal end, a proximal portion and a specimen recess therebetween for receiving a specimen at said site, said recess opening radially into said stylet from said outer surface and having an axially extending bottom wall and axially spaced apart distal and proximal end walls between said bottom wall and said outer surface and providing said recess with an entrance end radially spaced from said bottom wall, the improvement comprising: said entrance end having a first axial dimension, and at least one of said distal and proximal end walls being reentrant from said entrance end of said recess with respect to the corresponding one of said distal end and proximal portion of said stylet, whereby said recess has a second axial dimension radially inwardly of said entrance end greater than said first dimension.
Claim 2
Dependent Claim
189 words
In a biopsy needle for taking a biopsy specimen from a site in a patient comprising an outer tubular cannula having an axis, an inner tubular cannula coaxial with and relatively displaceably received in said outer cannula, and a styler coaxial with and relatively displaceably received in said inner cannula, said stylet having an outer surface, a distal end, a proximal portion and a specimen recess therebetween for receiving a specimen at said site, said recess opening radially into said stylet from said outer surface and having an axially extending bottom wall and axially spaced apart distal and proximal end walls between said bottom wall and said outer surface and providing said recess with an entrance end radially spaced from said bottom wall, the improvement comprising: said entrance end having a first axial dimension, and at least one of said distal and proximal end walls being reentrant from said entrance end of said recess with respect to the corresponding one of said distal end and proximal portion of said stylet, whereby said recess has a second axial dimension radially inwardly of said entrance end greater than said first dimension.
Claim 3
Dependent Claim
24 words
A biopsy needle according to claim 1, wherein said at least one wall is inclined at an acute angle relative to said bottom wall.
Claim 4
Dependent Claim
14 words
A biopsy needle according to claim 2, wherein said acute angle is about 45°.
Claim 5
Dependent Claim
23 words
A biopsy needle according to claim 1, wherein said at least one wall is arcuate between said entrance end and said bottom wall.
Claim 6
Dependent Claim
22 words
A biopsy needle according to claim 1, wherein both said distal and said proximal end walls are reentrant from said entrance end.
Claim 7
Dependent Claim
26 words
A biopsy needle according to claim 5, wherein each of said distal and proximal end walls is arcuate between said entrance end and said bottom wall.
Claim 8
Dependent Claim
27 words
A biopsy needle according to claim 5, wherein each of said distal and proximal end walls is inclined at an acute angle relative to said bottom wall.
Claim 9
Dependent Claim
14 words
A biopsy needle according to claim 7, wherein said acute angle is about 45°.
Claim 10
Dependent Claim
35 words
A biopsy needle according to claim 1, wherein said entrance end of said recess is at said outer surface of said stylet and said at least one end wall is reentrant from said outer surface.
Claim 11
Dependent Claim
22 words
A biopsy needle according to claim 9, wherein both said distal and said proximal end walls are reentrant from said outer surface.
Claim 12
Dependent Claim
26 words
A biopsy needle according to claim 10, wherein each said distal and said proximal end wall is arcuate between said outer surface and said bottom wall.
Claim 13
Dependent Claim
30 words
A biopsy needle according to claim 10, wherein each said distal and said proximal end wall is planar and inclined at an acute angle with respect to said bottom wall.
Claim 14
Dependent Claim
14 words
A biopsy needle according to claim 12, wherein said acute angle is about 45°.
Claim 15
Dependent Claim
145 words
A stylet for a biopsy needle, said stylet comprising a metal body portion having an axis, a distal end, a proximal portion axially spaced from said distal end, a circular outer surface between said distal end and said proximal portion, and a specimen recess in said outer surface, said recess including an axially extending bottom wall and distal and proximal end walls between said bottom wall and said outer surface and providing said recess with an entrance end radially spaced from said bottom wall, said entrance end having a first axial dimension and at least one of said distal and said proximal walls being reentrant from said entrance end with respect to the corresponding one of said distal end and proximal end portion of said stylet, whereby said recess has a second axial dimension radially inwardly of said entrance end greater than said first dimension.
Claim 16
Dependent Claim
145 words
A stylet for a biopsy needle, said stylet comprising a metal body portion having an axis, a distal end, a proximal portion axially spaced from said distal end, a circular outer surface between said distal end and said proximal portion, and a specimen recess in said outer surface, said recess including an axially extending bottom wall and distal and proximal end walls between said bottom wall and said outer surface and providing said recess with an entrance end radially spaced from said bottom wall, said entrance end having a first axial dimension and at least one of said distal and said proximal walls being reentrant from said entrance end with respect to the corresponding one of said distal end and proximal end portion of said stylet, whereby said recess has a second axial dimension radially inwardly of said entrance end greater than said first dimension.
Claim 17
Dependent Claim
23 words
A stylet according to claim 14, wherein said at least one wall is inclined at an acute angle relative to said bottom wall.
Claim 18
Dependent Claim
13 words
A stylet according to claim 14, wherein said acute angle is about 45°.
Claim 19
Dependent Claim
22 words
A stylet according to claim 14, wherein said at least one wall is arcuate between said entrance end and said bottom wall.
Claim 20
Dependent Claim
21 words
A stylet according to claim 14, wherein both said distal and said proximal end walls are reentrant from said entrance end.
Claim 21
Dependent Claim
25 words
A stylet according to claim 18, wherein each of said distal and proximal end walls is arcuate between said entrance end and said bottom wall.
Claim 22
Dependent Claim
26 words
A stylet according to claim 18, wherein each of said distal and proximal end walls is inclined at an acute angle relative to said bottom wall.
Claim 23
Dependent Claim
13 words
A stylet according to claim 20, wherein said acute angle is about 45°.
Claim 24
Dependent Claim
36 words
A stylet according to claim 14, wherein said entrance end of said recess is at said outer surface of said stylet, and both said distal and said proximal end walls are reentrant from said outer surface.
Claim 25
Dependent Claim
25 words
A stylet according to claim 22, wherein each said distal and said proximal end wall is arcuate between said outer surface and said bottom wall.
Claim 26
Dependent Claim
29 words
A stylet according to claim 22, wherein each said distal and said proximal end wall is planar and inclined at an acute angle with respect to said bottom wall.
Claim 27
Dependent Claim
13 words
A stylet according to claim 24, wherein said acute angle is about 45°.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-03-06 | 1998-09-05 | 1999-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-06 | 2002-09-05 | 2003-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-06 | 2006-09-05 | 2007-03-07 | $7700.00 | Window Closed / Lapsed |