US5172701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single use automated soft tissue aspiration biopsy device
Assignee: Medical Device Technologies Inc
•
Filing: 1990-02-28
•
Granted: 1992-12-22
•
Expires: 2010-02-28
Abstract
Abstract A biopsy device incorporating a housing, having a slide member therein, with one of a stylet or cannula connecting to the slide, while the other is fixed to the housing, such that when the slide member is shifted longitudinally within the housing, a displacement occurs between the forwardmost portions of the stylet and cannula, generating a reduced pressure therein, for aspirating a biopsy for analysis.
Inventors
- 👤 Harold G. Leigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:55
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233; A61B10/0283; A61B2217/00; A61B2217/002; A61B2217/005
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
271 words
A biopsy aspiration device comprising: a hollow cannula having a proximal end and a distal end; a stylet having a proximal end and a distal end and positioned within said cannula for axial movement relative thereto; a housing providing a sealed chamber and means for holding the operative components of the biopsy aspiration device; slide means movably associated with said housing in cooperative relationship with said sealed chamber, said slide means being movable from a cocked actuated position wherein the volume of said sealed chamber is minimized, to a released at rest position wherein the volume of said sealed chamber is maximized; biasing means engageable with said slide means when said slide means is in said cocked position to urge said slide means to said at rest position; cocking and releasing means associated with said slide means and said housing for moving said slide means against force of said biasing means to the cocked actuated position and for releasing said slide means to be moved to said released at rest position by said biasing means; said hollow cannula being communicated with said sealed chamber, and one of said stylet or said cannula having its proximal end fixedly anchored to said slide means and the other one of said stylet or said cannula having its proximal end anchored to said housing; whereby upon release of said slide means the resultant volume increase in said sealed chamber creates a pressure reduction, and the pressure reduction generated within said chamber is translated to the distal end of said cannula to effect aspiration of a biopsy specimen into the cannula during actuation of the device.
Claim 2
Dependent Claim
271 words
A biopsy aspiration device comprising: a hollow cannula having a proximal end and a distal end; a stylet having a proximal end and a distal end and positioned within said cannula for axial movement relative thereto; a housing providing a sealed chamber and means for holding the operative components of the biopsy aspiration device; slide means movably associated with said housing in cooperative relationship with said sealed chamber, said slide means being movable from a cocked actuated position wherein the volume of said sealed chamber is minimized, to a released at rest position wherein the volume of said sealed chamber is maximized; biasing means engageable with said slide means when said slide means is in said cocked position to urge said slide means to said at rest position; cocking and releasing means associated with said slide means and said housing for moving said slide means against force of said biasing means to the cocked actuated position and for releasing said slide means to be moved to said released at rest position by said biasing means; said hollow cannula being communicated with said sealed chamber, and one of said stylet or said cannula having its proximal end fixedly anchored to said slide means and the other one of said stylet or said cannula having its proximal end anchored to said housing; whereby upon release of said slide means the resultant volume increase in said sealed chamber creates a pressure reduction, and the pressure reduction generated within said chamber is translated to the distal end of said cannula to effect aspiration of a biopsy specimen into the cannula during actuation of the device.
Claim 3
Dependent Claim
26 words
The device according to claim 1 wherein said stylet is fixed to said housing and said cannula is fixed to said slide means and movable therewith.
Claim 4
Dependent Claim
26 words
The device according to claim 1 wherein said cannula is fixed to said housing and said stylet is fixed to said slide means and movable therewith.
Claim 5
Dependent Claim
36 words
The device of claim 1 wherein said stylet has a contoured surface provided along its length to facilitate the translation of the pressure reduction from the chamber to the distal end of the stylet and cannula.
Claim 6
Dependent Claim
38 words
The device of claim 1 and including sealing means between the slide means and the housing to enhance the generation of pressure reduction within said chamber during actuation of the device when operated to obtain a biopsy specimen.
Claim 7
Dependent Claim
33 words
The device of claim 5 and including a buffer provided forwardly of said slide means within the housing to cushion the impact of the device during its actuation in obtaining a biopsy specimen.
Claim 8
Dependent Claim
44 words
The device of claim 1 and including a valve means provided through the housing to allow an escape of pressurized air from the chamber as the slide means is moved to its cocked actuated position in preparation for actuation in taking a biopsy specimen.
Claim 9
Dependent Claim
15 words
The device of claim 7 and wherein said valve means is a one way valve.
Claim 10
Dependent Claim
46 words
The device of claim 1 and wherein said cocking and releasing means comprises a stem, said stem connecting to said slide means and extending exteriorly of said housing, said stem capable of being manually manipulated for cocking of said biopsy device in preparation for its usage.
Claim 11
Dependent Claim
32 words
The device of claim 9 and wherein said housing has a slot therein furnishing clearance for the exterior extension of said stem for manual grasping and manipulation during cocking of the device.
Claim 12
Dependent Claim
37 words
The device of claim 10 and including sealing means provided between the slide means and the housing to enhance the generation of pressure reduction within said chamber for generating a pressure reduction during actuation of the device.
Claim 13
Dependent Claim
21 words
The device of claim 11 and wherein said sealing means comprises an O-ring arranged between the slide means and said housing.
Claim 14
Dependent Claim
28 words
The device of claim 11 and wherein said sealing means is arranged intermediate the location of the attachment of the stem to said slide means and the chamber.
Claim 15
Dependent Claim
258 words
A biopsy aspiration device comprising: a hollow cannula having a proximal end and a distal end; a stylet having a proximal end and a distal end and positioned within said cannula for axial movement relative thereto; a housing providing a sealed chamber and means for holding the operative components of the biopsy aspiration device; slide means movably associated with said housing in cooperative relationship with said sealed chamber, said slide means being movable from a cocked actuated position wherein the volume of said sealed chamber is minimized, to a released at rest position wherein the volume of said sealed chamber is maximized; biasing means engageable with said slide means when said slide means is in said cocked position to urge said slide means to said at rest position; cocking and releasing means associated with said slide means and said housing for moving said slide means against force of said biasing means to the cocked actuated position and for releasing said slide means to be moved to said released at rest position by said biasing means; said hollow cannula being communicated with said sealed chamber, said cannula having its proximal end fixedly anchored to said slide means and said stylet having its proximal end anchored to said housing; whereby upon release of said slide means the resultant volume increase in said sealed chamber creates a pressure reduction, and the pressure reduction generated within said chamber is translated to the distal end of said cannula to effect aspiration of a biopsy specimen into the cannula during actuation of the device.
Claim 16
Dependent Claim
258 words
A biopsy aspiration device comprising: a hollow cannula having a proximal end and a distal end; a stylet having a proximal end and a distal end and positioned within said cannula for axial movement relative thereto; a housing providing a sealed chamber and means for holding the operative components of the biopsy aspiration device; slide means movably associated with said housing in cooperative relationship with said sealed chamber, said slide means being movable from a cocked actuated position wherein the volume of said sealed chamber is minimized, to a released at rest position wherein the volume of said sealed chamber is maximized; biasing means engageable with said slide means when said slide means is in said cocked position to urge said slide means to said at rest position; cocking and releasing means associated with said slide means and said housing for moving said slide means against force of said biasing means to the cocked actuated position and for releasing said slide means to be moved to said released at rest position by said biasing means; said hollow cannula being communicated with said sealed chamber, said cannula having its proximal end fixedly anchored to said slide means and said stylet having its proximal end anchored to said housing; whereby upon release of said slide means the resultant volume increase in said sealed chamber creates a pressure reduction, and the pressure reduction generated within said chamber is translated to the distal end of said cannula to effect aspiration of a biopsy specimen into the cannula during actuation of the device.
References Cited (Backward Citations)
US1835122A
Cited
US2360051A
Cited
US2623521A
Cited
US2881756A
Cited
US3088454A
Cited
US3477423A
Cited
US3561429A
Cited
US3587560A
Cited
US3656472A
Cited
US3613662A
Cited
US3989033A
Cited
US3913566A
Cited
US3995619A
Cited
US4239040A
Cited
US4177797A
Cited
US4258722A
Cited
US4262676A
Cited
US4256119A
Cited
US4266555A
Cited
US4356828A
Cited
US4356822A
Cited
US4403617A
Cited
US4517978A
Cited
USRE32922E
Cited
US4605011A
Cited
US4600014A
Cited
US4619272A
Cited
US4667684A
Cited
US4747414A
Cited
US4641663A
Cited
US4817631A
Cited
US4699154A
Cited
US4766907A
Cited
US4766908A
Cited
US4919146A
Cited
US4986278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-22 | 1996-06-22 | 1996-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-22 | 2000-06-22 | 2000-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-22 | 2004-06-22 | 2004-12-22 | $7700.00 | Window Closed / Lapsed |