US6015391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biopsy needle structure
Assignee: General Dynamics Mission Systems Inc
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Filing: 1998-10-06
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Granted: 2000-01-18
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Expires: 2018-10-06
Abstract
Abstract An improved biopsy needle having an outer cannula, an inner tube, and a stylet. A snare in the form of a coil is provided between the distal ends of the outer cannula and the inner tube. The coil is coupled to a sleeve affixed to the inner surface of the outer cannula using axially directed coupling elements. Upon rotation of the inner tube with respect to the outer cannula, the coil will decrease in diameter to either sever or hold the biopsy piece within the outer needle. After removal of the needle from the patient, rotating the inner tube in the opposite direction will cause the coil to expand to its original diameter and allow the biopsy piece to be removed from the needle.
Inventors
- 👤 Michael Lyne Rishton
- 👤 Harold Leonard Newman
- 👤 Alec Goldenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:19
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233; A61B10/0266; A61B17/00; A61B2017/0046; A61B2017/00473; A61B17/32; A61B17/320016; A61B2017/32004
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
118 words
A biopsy needle for removal of tissue from a patient of the type including an outer tube, an inner tube and a snare having first and second ends, the first snare end being coupled to said inner tube and said second snare end being coupled to said outer tube, said snare being movable between first and second positions by rotation of said inner tube with respect to said outer tube, wherein the improvement comprises: an axially directed coupling element at said second snare end, said axially directed coupling element being one of a projection and slot; the other of said projection and said slot being associated with said outer tube and arranged to engage said second snare end.
Claim 2
Dependent Claim
118 words
A biopsy needle for removal of tissue from a patient of the type including an outer tube, an inner tube and a snare having first and second ends, the first snare end being coupled to said inner tube and said second snare end being coupled to said outer tube, said snare being movable between first and second positions by rotation of said inner tube with respect to said outer tube, wherein the improvement comprises: an axially directed coupling element at said second snare end, said axially directed coupling element being one of a projection and slot; the other of said projection and said slot being associated with said outer tube and arranged to engage said second snare end.
Claim 3
Dependent Claim
22 words
The biopsy needle as in claim 1, wherein said second snare end is a ring which supports said axially directed coupling element.
Claim 4
Dependent Claim
33 words
The biopsy needle as in claim 1, further comprising a sleeve affixed to a distal end of said outer tube, the other of said projection and said slot being supported on said sleeve.
Claim 5
Dependent Claim
23 words
The biopsy needle as in claim 3, wherein said outer tube has a lumen and wherein said sleeve is disposed within the lumen.
Claim 6
Dependent Claim
34 words
The biopsy needle as in claim 1, wherein the inner tube has a keyed slot at a distal end thereof and wherein said first snare end is shaped to correspond to the keyed slot.
Claim 7
Dependent Claim
29 words
The biopsy needle as in claim 5, wherein said snare and said first snare end are formed and coupled to the inner tube by an injection molding process step.
Claim 8
Dependent Claim
27 words
The biopsy needle as in claim 1, wherein said snare includes a helical portion having an axial length that is shorter than the length of said projection.
Claim 9
Dependent Claim
70 words
A biopsy needle, comprising: an outer tube having a distal end; an inner tube extending within said outer tube, said inner tube having at one end a portion which increases and decreases in diameter with rotation of said inner tube relative to said outer tube, said portion of said inner tube and said distal end of said outer tube each including corresponding axial directed coupling elements which engage one another.
Claim 10
Dependent Claim
70 words
A biopsy needle, comprising: an outer tube having a distal end; an inner tube extending within said outer tube, said inner tube having at one end a portion which increases and decreases in diameter with rotation of said inner tube relative to said outer tube, said portion of said inner tube and said distal end of said outer tube each including corresponding axial directed coupling elements which engage one another.
Claim 11
Dependent Claim
23 words
The biopsy needle as in claim 8, wherein said portion has a ring which supports said axially directed coupling element of said portion.
Claim 12
Dependent Claim
32 words
The biopsy needle as in claim 8, further comprising a sleeve affixed to the distal end of said outer tube, said sleeve supporting said axially directed coupling element of said outer tube.
Claim 13
Dependent Claim
22 words
The biopsy needle as in claim 10, wherein said outer tube has a lumen and said sleeve is disposed within said lumen.
Claim 14
Dependent Claim
36 words
The biopsy needle as in claim 8, wherein said inner tube has a keyed slot at said one end and wherein said portion has a first end which is shaped to correspond to the keyed slot.
Claim 15
Dependent Claim
31 words
The biopsy needle as in claim 11, wherein said portion and said first end of said portion are formed and coupled to said inner tube by an injection molding process step.
Claim 16
Dependent Claim
45 words
The biopsy needle as in claim 8, wherein said portion is helically shaped and wherein said corresponding axial directed coupling elements comprise a projection and a slot, wherein said helically shaped portion has an axial length that is shorter than the length of said projection.
References Cited (Backward Citations)
US3605721A
Cited
US4461305A
Cited
US4576162A
Cited
US4653496A
Cited
US4651752A
Cited
US4785826A
Cited
US4932417A
Cited
US4935025A
Cited
US4926877A
Cited
US5919202A
Cited
US5148813A
Cited
US5267572A
Cited
US5133360A
Cited
US5823971A
Cited
US5522398A
Cited
US5634473A
Cited
US5762069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-01-17 | 2003-07-19 | 2004-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-01-17 | 2007-07-19 | 2008-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-01-17 | 2011-07-19 | 2012-01-18 | $7700.00 | Window Closed / Lapsed |