US5320110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pleural biopsy syringe-needles
Assignee: Individual
•
Filing: 1993-03-30
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Granted: 1994-06-14
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Expires: 2013-03-30
Abstract
Abstract Pleural biopsy device for reducing the probability of effecting pneumothorax in a patient during a pleural biopsy procedure, for facilitating the cutting of sample tissues of the parietal pleura, and for aspirating and removing large quantities of fluid from the patient's body without switching needles. Proximal ends of two hollow, inner and outer needles are directly attached to the plunger and the barrel of a syringe, respectively. When properly assembled, the syringe, and the inner and the outer needles form a closed system that seals out the external air and the arrangement permits tissue collection without intermediate needle withdrawal during the procedure.
Inventors
- 👤 Ko P. Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:30
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233; A61B10/0266; A61B10/0275
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
252 words
A biopsy device comprising, in combination, a syringe barrel having fixed thereto a first elongated, hollow needle having a sharpened distal end and a first inner diameter, said first needle including means defining a first elongated opening in a side wall thereof leading into the lumen and extending along a predetermined axial length thereof for a distance greater than the diameter of the needle and for a predetermined partial circumferential extent thereabout, said first elongated opening including at least one tissue engaging edge, said first elongated opening being spaced axially toward a proximal end from the sharpened distal end, said first needle further including means defining an aperture extending through the side wall opposite from said first elongated opening and a syringe plunger, operative within said syringe barrel, having fixed thereto a second elongated, hollow needle having a distal end and an outer diameter that is smaller than said first inner diameter, said second needle being slidingly received within said first needle, said second needle having means defining an aperture leading into the lumen of said second needle, said aperture being positioned adjacent the distal end of said plunger, and further including means defining a second elongated opening in a side wall thereof leading into the lumen an extending along the axial length thereof for a distance greater than the diameter of the second needle and for a predetermined circumferential extent thereabout to form a tissue engaging edge, said second elongated opening being spaced proximally a predetermined distance from said distal end.
Claim 2
Dependent Claim
252 words
A biopsy device comprising, in combination, a syringe barrel having fixed thereto a first elongated, hollow needle having a sharpened distal end and a first inner diameter, said first needle including means defining a first elongated opening in a side wall thereof leading into the lumen and extending along a predetermined axial length thereof for a distance greater than the diameter of the needle and for a predetermined partial circumferential extent thereabout, said first elongated opening including at least one tissue engaging edge, said first elongated opening being spaced axially toward a proximal end from the sharpened distal end, said first needle further including means defining an aperture extending through the side wall opposite from said first elongated opening and a syringe plunger, operative within said syringe barrel, having fixed thereto a second elongated, hollow needle having a distal end and an outer diameter that is smaller than said first inner diameter, said second needle being slidingly received within said first needle, said second needle having means defining an aperture leading into the lumen of said second needle, said aperture being positioned adjacent the distal end of said plunger, and further including means defining a second elongated opening in a side wall thereof leading into the lumen an extending along the axial length thereof for a distance greater than the diameter of the second needle and for a predetermined circumferential extent thereabout to form a tissue engaging edge, said second elongated opening being spaced proximally a predetermined distance from said distal end.
Claim 3
Dependent Claim
17 words
A biopsy device as in claim 1 wherein said first needle further includes a sharpened distal end.
Claim 4
Dependent Claim
21 words
A biopsy device as in claim 1 further including a connector member positioned between said first needle and said syringe barrel.
Claim 5
Dependent Claim
16 words
A biopsy device as in claim 1 wherein said second needle has a sharpened distal end.
Claim 6
Dependent Claim
24 words
A biopsy device as in claim 1 wherein the opening in each of said first and second needles includes at least one sharp edge.
Claim 7
Dependent Claim
29 words
A biopsy device as in claim 1 further including a connector member positioned between said first needle and said syringe barrel, said connector member including a normally closed outlet.
Claim 8
Dependent Claim
16 words
A biopsy device as in claim 6 wherein said normally closed outlet includes a removable cap.
Claim 9
Dependent Claim
18 words
A biopsy device as in claim 6 wherein said normally closed outlet includes a pressure activated flap valve.
Claim 10
Dependent Claim
19 words
A biopsy device as in claim 8 wherein a positive pressure activates said flap valve into an open position.
Claim 11
Dependent Claim
20 words
A biopsy device as in claim 9 further including means for respectively locating and aligning said first and second needles.
Claim 12
Dependent Claim
23 words
A biopsy device as in claim 9 further including means for respectively locating and aligning the openings in said first and second needles.
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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) | 1997-06-13 | 1997-12-13 | 1998-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-13 | 2001-12-13 | 2002-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-13 | 2005-12-13 | 2006-06-14 | $7700.00 | Window Closed / Lapsed |