Patent US5560373A successfully refreshed from Google Patents.
US5560373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Needle core biopsy instrument with durable or disposable cannula assembly
Assignee: Devicor Medical Products Inc
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Filing: 1995-04-06
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Granted: 1996-10-01
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Expires: 2015-04-06
Abstract
Abstract A needle core biopsy instrument/extractor for extracting a tissue sample via needle aspiration is disclosed. The extractor comprises a first cannula having a sharpened, beveled cutting tip and biopsy reservoir formed on it distal end. The proximal end of the first cannula is in fluid communication with a conventional syringe such that when the plunger of the syringe is retracted via manipulation o the extractor, a vacuum is created within the biopsy reservoir of the first cannula Axially mounted about the first cannula is a second cutting cannula which is designed and configured to selectively cover and uncover the distal end of the first cannula. A biasing member, preferably a spring, is provided to urge the second cannula forward about the distal end of the first cannula. The syringe, coaxially positioned first and second cannulas, and biasing member are contained within an introducer which is preferably designed and configured to be manipulated by one hand. The handle slide and lever of the device are oriented in such a way as to allow the retention of tissue via vacuum and the severing of the specimen by the second cannula to be exactly timed by cam operation.
Inventors
- 👤 Stephen A. De Santis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:36
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233; A61B10/0283
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
262 words
A tissue sample extractor comprising: a) a first biopsy cannula having proximal and distal ends, said proximal end having a first shoulder attached thereto, said distal end having a sharpened beveled cutting tip and a biopsy reservoir formed thereon, said biopsy reservoir being formed proximal said cutting tip; b) a device for creating a vacuum, said device being attached to said first shoulder and in fluid communication with said biopsy reservoir of said first biopsy cannula; c) a second cutting cannula having proximal and distal ends, said proximal end having a second shoulder attached thereto, said distal end having a sharpened cutting edge formed thereon, said second cutting cannula being axially mounted about said first biopsy cannula such that said first biopsy cannula is partially telescoped within said second cutting cannula; d) a biasing member disposed between said first shoulder and said second shoulder such that said second shoulder urges said second cutting cannula to distally advance about said first biopsy cannula; e) a guide along which said second shoulder moves as said second shoulder urges said second cutting cannula to distally advance about said first biopsy cannula; and f) an introducer, said introducer being detachably engaged with said device for creating a vacuum and said second shoulder of said second cutting cannula, said introducer being so attached to said second cutting cannula and said device for creating a vacuum that said introducer controllably adjusts the relative positions of said first and second cannulas such that said distal end of said second cutting cannula is selectively movable about said first biopsy cannula.
Claim 2
Dependent Claim
262 words
A tissue sample extractor comprising: a) a first biopsy cannula having proximal and distal ends, said proximal end having a first shoulder attached thereto, said distal end having a sharpened beveled cutting tip and a biopsy reservoir formed thereon, said biopsy reservoir being formed proximal said cutting tip; b) a device for creating a vacuum, said device being attached to said first shoulder and in fluid communication with said biopsy reservoir of said first biopsy cannula; c) a second cutting cannula having proximal and distal ends, said proximal end having a second shoulder attached thereto, said distal end having a sharpened cutting edge formed thereon, said second cutting cannula being axially mounted about said first biopsy cannula such that said first biopsy cannula is partially telescoped within said second cutting cannula; d) a biasing member disposed between said first shoulder and said second shoulder such that said second shoulder urges said second cutting cannula to distally advance about said first biopsy cannula; e) a guide along which said second shoulder moves as said second shoulder urges said second cutting cannula to distally advance about said first biopsy cannula; and f) an introducer, said introducer being detachably engaged with said device for creating a vacuum and said second shoulder of said second cutting cannula, said introducer being so attached to said second cutting cannula and said device for creating a vacuum that said introducer controllably adjusts the relative positions of said first and second cannulas such that said distal end of said second cutting cannula is selectively movable about said first biopsy cannula.
Claim 3
Dependent Claim
81 words
The tissue sample extractor of claim 1 wherein: a) said device for creating a vacuum comprises a conventional syringe and plunger; b) said biasing member disposed between said first shoulder and said second shoulder comprises a spring member; and c) said introducer comprises a handle and syringe retainer in combination with a plunger retractor member, said handle and syringe retainer and said plunger retractor member being so combined that said retainer and said retractor member cooperate to form a gun-like member.
Claim 4
Dependent Claim
132 words
The tissue sample extractor of claim 2 wherein said plunger retractor member comprises a generally C-shaped member having an attachable trigger-shaped member depending therefrom and a slot formed thereon to engage said plunger, said generally C-shaped member having a cam bar pivotally attached along a top portion thereof, said cam bar having a first can slot and a second cam abutment surface, said first cam slot and said second cam abutment surface being designed and configured to detachably engage with said second shoulder of said second cutting cannula, said first cam slot and said second cam abutment surface being spaced such that said second cutting cannula is urged forward about said first biopsy cannula such that said distal end of said first biopsy cannula is selectively covered by said second cutting cannula.
Claim 5
Dependent Claim
59 words
The tissue sample extractor of claim 3 wherein: a) said first can slot detachably engages said second shoulder such that said second cutting cannula selectively covers said biopsy reservoir and leaves said sharpened beveled cutting tip uncovered; and b) said second cam abutment surface detachably engages said second shoulder such that said second cutting cannula covers said biopsy reservoir.
Claim 6
Dependent Claim
17 words
The tissue sample extractor of claim 4 wherein said introducer may be used by a single hand.
Claim 7
Dependent Claim
59 words
The tissue sample extractor of claim 5 wherein said biasing member and said introducer cooperate to allow said first biopsy cannula to advance through said second cutting cannula such that said biopsy reservoir is covered and said sharpened beveled cutting tip is exposed when said first biopsy cannula and said second cutting cannula are inserted into a tissue mass.
Claim 8
Dependent Claim
67 words
The tissue sample extractor of claim 6 wherein said cam bar may be manually adjusted such that said second shoulder is urged from said first can slot to said second cam abutment surface, said cam bar being further manually adjustable such that said second shoulder is releasably from said second cam abutment surface such that said cutting cannula may be axially removed from said second cutting cannula.
Claim 9
Dependent Claim
89 words
The tissue sample extractor of claim 7 wherein when said first biopsy cannula and said second cutting cannula are embedded with a tissue mass and said biopsy reservoir is exposed by withdrawal of second cutting cannula, said cam bar may be manually adjusted such that said biasing member forces said second cutting cannula to distally advance over said biopsy reservoir of said first biopsy cannula wherein said distal advancement forces said second cutting cannula to sever a portion of said tissue and contain said portion within said biopsy reservoir.
Claim 10
Dependent Claim
56 words
The tissue sample extractor of claim 8 wherein said cam bar may be further manually adjusted such that said biasing member forces said second cutting cannula to become embedded within said tissue mass, said second cutting cannula being so embedded that at least one additional sample of tissue may be extracted through said second cutting cannula.
Claim 11
Dependent Claim
23 words
The tissue sample extractor of claim 1 wherein said guide is configured to prevent side-to-side and upward bending of said first biopsy cannula.
Claim 12
Dependent Claim
46 words
The tissue sample extractor of claim 1 wherein said second shoulder is configured as a disk and said guide comprises a complimentary channel along which said second shoulder moves as said second shoulder urges said second cutting cannula to distally advance about said first biopsy cannula.
Claim 13
Dependent Claim
30 words
The tissue sample extractor of claim 1 wherein said beveled cutting tip of said first biopsy cannula comprises a solid plug having a scalloped portion defining the sharpened bevel thereof.
Claim 14
Dependent Claim
22 words
The tissue sample extractor of claim 12 wherein the scalloped portion of said beveled cutting tip is formed via electron discharge machining.
Claim 15
Dependent Claim
28 words
The tissue sample extractor of claim 12 wherein said beveled cutting tip is attached to said first biopsy cannula by at least one of press fitting and crimping.
Claim 16
Dependent Claim
28 words
The tissue sample extractor of claim 1 wherein said biopsy reservoir comprises an obstructing member for preventing the vacuum from pulling a tissue sample from said biopsy reservoir.
Claim 17
Dependent Claim
31 words
The tissue sample extractor as recited in claim 15 wherein said obstructing member comprises an inwardly bent tab formed from said first biopsy cannula at a periphery of said biopsy reservoir.
Claim 18
Dependent Claim
28 words
The tissue sample extractor as recited in claim 1 further comprising a seal configured to mitigate vacuum leakage intermediate said first biopsy cannula and said second cutting cannula.
Claim 19
Dependent Claim
38 words
The tissue sample extractor as recited in claim 17 wherein said seal comprises an annular member formed of a resilient material disposed about said first biopsy cannula, said annular member being biased in position via said biasing member.
Claim 20
Dependent Claim
20 words
The tissue sample extractor of claim 1 wherein the sharpened cutting edge of said second cutting cannula comprises a bevel.
Claim 21
Dependent Claim
26 words
The tissue sample extractor of claim 12 wherein the diameter of said solid plug is approximately equal to the outer diameter of said first biopsy cannula.
Claim 22
Dependent Claim
26 words
The tissue sample extractor of claim 12 wherein the diameter of said solid plug is approximately equal to the outer diameter of said second cutting cannula.
Claim 23
Dependent Claim
29 words
The tissue sample extractor of claim 1 wherein said first biopsy cannula and said second cutting cannula are configured to be removable from said introducer and may be disposable.
Claim 24
Dependent Claim
252 words
A tissue sample extractor comprising: a) a first biopsy cannula having proximal and distal ends, said proximal end having a first shoulder attached thereto, said distal end having a sharpened beveled cutting tip and a biopsy reservoir formed thereon, said biopsy reservoir being formed proximal said cutting tip; b) a device for creating a vacuum, said device being attached to said first shoulder and in fluid communication with said biopsy reservoir of said first biopsy cannula; c) an obstructing member for preventing the vacuum from pulling a tissue sample from said biopsy reservoir. d) a second cutting cannula having proximal and distal ends, said proximal end having a second shoulder attached thereto, said distal end having a sharpened cutting edge formed thereon, said second cutting cannula being axially mounted about said first biopsy cannula such that said first biopsy cannula is partially telescoped within said second cannula; e) a biasing member disposed between said first shoulder and said second shoulder such that said second shoulder urges said second cutting cannula to distally advance about said first biopsy cannula; and f) an introducer, said introducer being detachably engaged with said device for creating a vacuum and said second shoulder of said second cutting cannula, said introducer being so attached to said second cutting cannula and said device for creating a vacuum that said introducer controllably adjusts the relative positions of said first and second cannulas such that said distal end of said second cutting cannula is selectively movable about said first biopsy cannula.
Claim 25
Dependent Claim
252 words
A tissue sample extractor comprising: a) a first biopsy cannula having proximal and distal ends, said proximal end having a first shoulder attached thereto, said distal end having a sharpened beveled cutting tip and a biopsy reservoir formed thereon, said biopsy reservoir being formed proximal said cutting tip; b) a device for creating a vacuum, said device being attached to said first shoulder and in fluid communication with said biopsy reservoir of said first biopsy cannula; c) an obstructing member for preventing the vacuum from pulling a tissue sample from said biopsy reservoir. d) a second cutting cannula having proximal and distal ends, said proximal end having a second shoulder attached thereto, said distal end having a sharpened cutting edge formed thereon, said second cutting cannula being axially mounted about said first biopsy cannula such that said first biopsy cannula is partially telescoped within said second cannula; e) a biasing member disposed between said first shoulder and said second shoulder such that said second shoulder urges said second cutting cannula to distally advance about said first biopsy cannula; and f) an introducer, said introducer being detachably engaged with said device for creating a vacuum and said second shoulder of said second cutting cannula, said introducer being so attached to said second cutting cannula and said device for creating a vacuum that said introducer controllably adjusts the relative positions of said first and second cannulas such that said distal end of said second cutting cannula is selectively movable about said first biopsy cannula.
Claim 26
Dependent Claim
24 words
The tissue sample extractor of claim 23 wherein said obstructing member comprises an inwardly bent tab formed at a periphery of said biopsy reservoir.
Claim 27
Dependent Claim
130 words
A disposable cannula assembly for a tissue sample extractor, said cannula assembly comprising: a) a first biopsy cannula having proximal and distal ends, said distal end having a sharpened beveled cutting tip and a biopsy reservoir formed thereon, said biopsy reservoir being formed proximal said cutting tip, a lumen being formed through said first biopsy cannula for transmitting a vacuum to said biopsy reservoir; b) a second cutting cannula having proximal and distal ends, said second cutting cannula being axially mounted about said first biopsy cannula such that said first biopsy cannula is partially telescoped within said second cutting cannula, said second cutting cannula having a sharpened cutting edge formed thereon; and c) said first biopsy cannula and said second cutting cannula being configured for removable attachment to an introducer.
Claim 28
Dependent Claim
130 words
A disposable cannula assembly for a tissue sample extractor, said cannula assembly comprising: a) a first biopsy cannula having proximal and distal ends, said distal end having a sharpened beveled cutting tip and a biopsy reservoir formed thereon, said biopsy reservoir being formed proximal said cutting tip, a lumen being formed through said first biopsy cannula for transmitting a vacuum to said biopsy reservoir; b) a second cutting cannula having proximal and distal ends, said second cutting cannula being axially mounted about said first biopsy cannula such that said first biopsy cannula is partially telescoped within said second cutting cannula, said second cutting cannula having a sharpened cutting edge formed thereon; and c) said first biopsy cannula and said second cutting cannula being configured for removable attachment to an introducer.
Claim 29
Dependent Claim
29 words
The cannula assembly of claim 1 further comprising a spring disposed about said first biopsy cannula for biasing said second cutting cannula distally relative to said first biopsy cannula.
Claim 30
Dependent Claim
53 words
The cannula assembly as recited in claim 25 wherein said first biopsy cannula comprises an undercut tab formed at a proximal end of said biopsy reservoir and bent inwardly so as to form an obstruction for preventing tissue samples from being pulled by vacuum from the biopsy reservoir into the first biopsy cannula.
Claim 31
Dependent Claim
23 words
The cannula assembly as recited in claim 25 wherein the cutting tip of said first biopsy cannula comprises a solid sharp cutting tip.
Claim 32
Dependent Claim
32 words
The cannula assembly as recited in claim 25 wherein said first biopsy cannula is configured to remain substantially stationary during use and said second cutting cannula is configured to move during use.
Claim 33
Dependent Claim
33 words
The cannula assembly as recited in claim 25 wherein said first biopsy cannula is configured to attach directly to the introducer and the second cutting cannula slides relative to said first biopsy cannula.
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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) | 1999-10-01 | 2000-04-01 | 2000-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-01 | 2004-04-01 | 2004-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-01 | 2008-04-01 | 2008-10-01 | $7700.00 | Window Closed / Lapsed |