US5425376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for obtaining a biopsy sample
Assignee: Medtronic Sofamor Danek Inc
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Filing: 1993-09-08
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Granted: 1995-06-20
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Expires: 2013-09-08
Abstract
Abstract A tool is disclosed, for taking a biopsy sample, having a needle attached to a syringe, with an opening in the side of the needle, which can be selectively covered by a cannula slidably mounted over the needle. The cannula can be locked into place on the needle, and the plunger of the syringe can be spring loaded to draw a sample into the syringe upon release of a latch. A method is also disclosed for taking a biopsy sample by sliding a cannula over a needle, inserting the cannula and needle into the tissue to be sampled, partially withdrawing the cannula from the needle to expose a lateral opening in the needle, maneuvering a sample of the tissue into the opening, cutting the sample from the tissue, and drawing the sample out through the needle.
Inventors
- 👤 Algis R. Banys
- 👤 George H. Middle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:55
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233; A61B10/0266; A61B10/0275; A61B2010/0208
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
80 words
A biopsy tool, comprising: a hollow needle, said needle having a closed distal end; a lateral opening in said needle; a hollow cannula coaxially mountable to said needle for selective purely longitudinal movement relative to said needle to block said lateral opening; locking means for locking said cannula against pure longitudinal movement relative to said needle; and suction means connectable to said needle; wherein said locking means locks said cannula by rotational movement of said cannula relative to said needle.
Claim 2
Dependent Claim
80 words
A biopsy tool, comprising: a hollow needle, said needle having a closed distal end; a lateral opening in said needle; a hollow cannula coaxially mountable to said needle for selective purely longitudinal movement relative to said needle to block said lateral opening; locking means for locking said cannula against pure longitudinal movement relative to said needle; and suction means connectable to said needle; wherein said locking means locks said cannula by rotational movement of said cannula relative to said needle.
Claim 3
Dependent Claim
77 words
A biopsy tool as claimed in claim 1, where said locking means comprises: a locking barrel mounted on a proximal end of said needle; a guide groove in a surface of said locking barrel; and a follower pin on said cannula, said pin being positioned for movement along said guide groove from a first position where said cannula is locked, to a second position where said cannula is unlocked, for pure longitudinal movement relative to said needle.
Claim 4
Dependent Claim
35 words
A biopsy tool as claimed in claim 1, further comprising a sharp edge on said cannula for cutting any tissue extending through said lateral opening, when said cannula is moved to block said lateral opening.
Claim 5
Dependent Claim
28 words
A biopsy tool as claimed in claim 3, wherein said sharp edge aligns with said distal end of said needle to promote ease of insertion into a patient.
Claim 6
Dependent Claim
18 words
A biopsy tool as claimed in claim 1, wherein said suction means comprises a syringe having a plunger.
Claim 7
Dependent Claim
97 words
A biopsy tool, comprising: a hollow needle, said needle having a closed distal end; a lateral opening in said needle; a hollow cannula coaxially mountable to said needle for selective movement relative to said needle to block said lateral opening; a syringe connectable to said needle, said syringe having a plunger; a locking barrel mounted on a proximal end of said needle; a male luer lock on said locking barrel; a female luer lock on said syringe; and a selectively releasable latch mounted on said syringe to hold said plunger in an inserted position within said syringe.
Claim 8
Dependent Claim
97 words
A biopsy tool, comprising: a hollow needle, said needle having a closed distal end; a lateral opening in said needle; a hollow cannula coaxially mountable to said needle for selective movement relative to said needle to block said lateral opening; a syringe connectable to said needle, said syringe having a plunger; a locking barrel mounted on a proximal end of said needle; a male luer lock on said locking barrel; a female luer lock on said syringe; and a selectively releasable latch mounted on said syringe to hold said plunger in an inserted position within said syringe.
Claim 9
Dependent Claim
20 words
A biopsy tool as claimed in claim 6, further comprising biasing means for biasing said plunger toward a withdrawn position.
Claim 10
Dependent Claim
115 words
A biopsy tool, comprising: a hollow needle, said needle having a closed distal end; a lateral opening in said needle, near said distal end of said needle; a locking barrel coaxially mountable on a proximal end of said needle; a hollow cannula coaxially mountable on the exterior of said needle and said locking barrel, for selective movement relative to said needle to block said lateral opening; a guide groove on an exterior surface of said locking barrel; a follower pin projecting radially inwardly from an interior surface of said cannula, into said guide groove, for controlling the relative positions of said cannula and said needle; and suction means connectable in fluid communication with said needle.
Claim 11
Dependent Claim
115 words
A biopsy tool, comprising: a hollow needle, said needle having a closed distal end; a lateral opening in said needle, near said distal end of said needle; a locking barrel coaxially mountable on a proximal end of said needle; a hollow cannula coaxially mountable on the exterior of said needle and said locking barrel, for selective movement relative to said needle to block said lateral opening; a guide groove on an exterior surface of said locking barrel; a follower pin projecting radially inwardly from an interior surface of said cannula, into said guide groove, for controlling the relative positions of said cannula and said needle; and suction means connectable in fluid communication with said needle.
Claim 12
Dependent Claim
85 words
A biopsy tool as claimed in claim 8, wherein: said selective movement of said cannula is longitudinal relative to said needle; said follower pin moves from a first position in said guide groove to a second position in said guide groove; when said follower pin is in said first position, said cannula is prevented from purely longitudinal movement relative to said needle; and when said follower pin is in said second position, said cannula is allowed to have purely longitudinal movement relative to said needle.
Claim 13
Dependent Claim
21 words
A biopsy tool as claimed in claim 8, wherein said suction means comprises a syringe having a plunger within a barrel,
Claim 14
Dependent Claim
26 words
A biopsy tool as claimed in claim 10, further comprising biasing means for biasing said plunger toward a position withdrawn from said barrel of said syringe.
Claim 15
Independent Claim
167 words
A method for taking a biopsy sample of tissue, comprising the steps of: providing a hollow needle, said needle having a closed distal end and a lateral opening near said distal end; coaxially mounting a hollow cannula on said needle so as to block said lateral opening; inserting said distal end of said needle and said cannula into the tissue to be sampled; moving said cannula relative to said needle to expose said lateral opening to the tissue; maneuvering said distal end of said needle to place the sample of tissue inside said needle through said lateral opening; moving said cannula relative to said needle to cut the sample from the tissue; attaching a syringe to said needle, said syringe having a plunger which is spring biased toward a withdrawn position, said syringe also having a selectively releasable latch holding said plunger in an inserted position; and releasing said latch to allow said plunger to move toward said withdrawn position, thereby drawing a suction on said needle.
Claim 16
Independent Claim
167 words
A method for taking a biopsy sample of tissue, comprising the steps of: providing a hollow needle, said needle having a closed distal end and a lateral opening near said distal end; coaxially mounting a hollow cannula on said needle so as to block said lateral opening; inserting said distal end of said needle and said cannula into the tissue to be sampled; moving said cannula relative to said needle to expose said lateral opening to the tissue; maneuvering said distal end of said needle to place the sample of tissue inside said needle through said lateral opening; moving said cannula relative to said needle to cut the sample from the tissue; attaching a syringe to said needle, said syringe having a plunger which is spring biased toward a withdrawn position, said syringe also having a selectively releasable latch holding said plunger in an inserted position; and releasing said latch to allow said plunger to move toward said withdrawn position, thereby drawing a suction on said needle.
Claim 17
Dependent Claim
23 words
A method as claimed in claim 12, wherein said step of moving said cannula to expose said lateral opening is a longitudinal movement.
Claim 18
Dependent Claim
22 words
A method as claimed in claim 12, wherein said step of moving said cannula to cut the sample is a longitudinal movement.
Claim 19
Independent Claim
247 words
A method for taking a biopsy sample of tissue, comprising the steps of: providing a hollow needle, said needle having a closed distal end and a lateral opening near said distal end; attaching a syringe to said needle, said syringe having a plunger which is latched in a first position inserted in a barrel of said syringe by a selectively releasable latch, and said syringe having a biasing means for biasing said plunger toward a second position withdrawn from said syringe barrel; coaxially mounting a hollow cannula on said needle so as to block said lateral opening; locking said cannula against longitudinal movement relative to said needle, with a distal end of said cannula aligned with said distal end of said needle; inserting said distal end of said needle and said cannula into the tissue to be sampled; unlocking said cannula to allow longitudinal movement relative to said needle; withdrawing said cannula longitudinally relative to said needle to expose said lateral opening to the tissue; maneuvering said distal end of said needle to place the sample of tissue inside said needle through said lateral opening; advancing said cannula longitudinally relative to said needle to cut the sample from the tissue; positioning said distal end of said needle in a fluid; withdrawing said cannula longitudinally relative to said needle to expose said lateral opening to the fluid; and releasing said latch to allow said plunger to move toward said withdrawn position to draw the sample into said syringe.
Claim 20
Independent Claim
247 words
A method for taking a biopsy sample of tissue, comprising the steps of: providing a hollow needle, said needle having a closed distal end and a lateral opening near said distal end; attaching a syringe to said needle, said syringe having a plunger which is latched in a first position inserted in a barrel of said syringe by a selectively releasable latch, and said syringe having a biasing means for biasing said plunger toward a second position withdrawn from said syringe barrel; coaxially mounting a hollow cannula on said needle so as to block said lateral opening; locking said cannula against longitudinal movement relative to said needle, with a distal end of said cannula aligned with said distal end of said needle; inserting said distal end of said needle and said cannula into the tissue to be sampled; unlocking said cannula to allow longitudinal movement relative to said needle; withdrawing said cannula longitudinally relative to said needle to expose said lateral opening to the tissue; maneuvering said distal end of said needle to place the sample of tissue inside said needle through said lateral opening; advancing said cannula longitudinally relative to said needle to cut the sample from the tissue; positioning said distal end of said needle in a fluid; withdrawing said cannula longitudinally relative to said needle to expose said lateral opening to the fluid; and releasing said latch to allow said plunger to move toward said withdrawn position to draw the sample into said syringe.
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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) | 1998-06-19 | 1998-12-19 | 1999-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-19 | 2002-12-19 | 2003-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-19 | 2006-12-19 | 2007-06-20 | $7700.00 | Window Closed / Lapsed |