US3882849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soft Tissue Biopsy Device
Assignee: Individual
•
Filing: 1974-03-25
•
Granted: 1975-05-13
•
Expires: 1994-03-25
Abstract
Abstract A soft tissue biopsy aspirating device for gathering soft tissue samples comprising a syringe having a barrel, with a reciprocably movable plunger sealingly received within the barrel to form a chamber with a controllably variable volume, and with a hollow sample-receiving needle mounted on a needle mounting boss attached to the barrel. The needle mounting boss has a rigid needle mounting shaft coupled on the end thereof, the shaft having a bore formed therein with a longitudinal segment and a radial segment to provide communication between the hollow core of the needle and the barrel with sample blocking means having an angularly disposed abutment surface thereon being provided to arrest inward motion of the sample and retain the sample so obtained in a stable position to prevent direct contact between the sample and the bore formed in the shaft. The plunger is secured to the conventional gripping shaft, and the gripping shaft has means for releasably engaging the proximate end of the barrel at controllable axial dispositions therealong. In use, the needle is used to puncture the body, and the tip of the needle is advanced until it reaches a point adjacent the organ from which the soft tissue is to be collected. At this point, the plunger is withdrawn and locked into engagement with the barrel, so as to form a partial vacuum within the barrel. The advancement of the needle is continued, thereby gathering a sample of tissue from the desired organ, with the tissue sample moving into the needle shank until contact is made with the abutment surface. The rigid needle mounting shaft supports and stabilizes the needle.
Inventors
- 👤 Khosrow Jamshidi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:01
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233; A61B10/0283; A61B2217/00; A61B2217/002; A61B2217/005
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
262 words
Biopsy aspirating means for gathering soft tissue samples comprising: a. syringe means having a barrel, a reciprocable plunger sealingly received within such barrel and forming a controllably variable volume chamber with the interior of said barrel, a sample-receiving hollow needle having a sharpened tip, and needle mounting boss means at the base of said barrel and extending from said barrel and having a means receiving the hub of said sample-receiving needle thereon; b. a gripping shaft coupled to said plunger and extending outwardly from said barrel, guide plate means disposed at the proximate end of said barrel and having an opening formed therein to receive said gripping shaft, said gripping shaft having locking lug means formed thereon and arranged to releasably engage the outer surface of said guide plate means for retaining said plunger in a position removed from said barrel tip means; c. said needle mounting boss means having a central bore formed therein, a rigid needle mounting shaft disposed within said bore, said needle mounting shaft having an angularly disposed biopsy sample abutment surface at the forward end thereof, a bore formed within said needle mounting shaft and providing communication between said barrel and said hollow needle shaft at an orifice at the end of said needle mounting shaft bore, said orifice being disposed at a point spaced a finite distance from said angularly disposed sample abutment surface, said angularly disposed abutment surface being received within the bore of said hollow needle and being disposed along said needle shaft at a point removed from the tip end of said needle.
Claim 2
Dependent Claim
262 words
Biopsy aspirating means for gathering soft tissue samples comprising: a. syringe means having a barrel, a reciprocable plunger sealingly received within such barrel and forming a controllably variable volume chamber with the interior of said barrel, a sample-receiving hollow needle having a sharpened tip, and needle mounting boss means at the base of said barrel and extending from said barrel and having a means receiving the hub of said sample-receiving needle thereon; b. a gripping shaft coupled to said plunger and extending outwardly from said barrel, guide plate means disposed at the proximate end of said barrel and having an opening formed therein to receive said gripping shaft, said gripping shaft having locking lug means formed thereon and arranged to releasably engage the outer surface of said guide plate means for retaining said plunger in a position removed from said barrel tip means; c. said needle mounting boss means having a central bore formed therein, a rigid needle mounting shaft disposed within said bore, said needle mounting shaft having an angularly disposed biopsy sample abutment surface at the forward end thereof, a bore formed within said needle mounting shaft and providing communication between said barrel and said hollow needle shaft at an orifice at the end of said needle mounting shaft bore, said orifice being disposed at a point spaced a finite distance from said angularly disposed sample abutment surface, said angularly disposed abutment surface being received within the bore of said hollow needle and being disposed along said needle shaft at a point removed from the tip end of said needle.
Claim 3
Dependent Claim
36 words
The means for gathering soft tissue biopsy samples as defined in claim 1 and being particularly characterized in that said needle mounting boss means is compressible for grippingly engaging the inner diameter of said needle hub.
Claim 4
Dependent Claim
36 words
The means for gathering soft tissue biopsy samples as defined in claim 1 being particularly characterized in that said boss and angularly disposed abutment surface are formed integrally with said barrel, and form a continuation thereof.
Claim 5
Dependent Claim
97 words
The means for gathering soft tissue biopsy samples as defined in claim 1 being particularly characterized in that said locking lug means on said gripping shaft are radially spaced, and radially spaced locking lug means are formed on the outer surface of said guide plate for lockingly engaging the radially spaced locking lugs formed on said gripping shaft and wherein the radial spacing of each of said locking lug means facilitates free axial motioN in one relative radial disposition, with locking being established between said gripping shaft and said guide plate in a second relative radial disposition.
Claim 6
Dependent Claim
73 words
The means for gathering soft tissue biopsy samples as defined in claim 1 being particularly characterized in that said sample abutment surface is formed along the forward wall of said rigid needle mounting shaft, and wherein said mounting shaft has a bore formed therein with a generally radially extending segment and providing communication between said barrel chamber and said hollow needle shaft, said radially extending segment being spaced inwardly of said abutment surface.
Claim 7
Dependent Claim
24 words
The means for gathering soft tissue biopsy samples as defined in claim 1 wherein said rigid needle mounting shaft is fabricated from stainless steel.
Claim 8
Dependent Claim
46 words
The means for gathering soft tissue biopsy samples as defined in claim 1 being particularly characterized in that the bore formed in said needle mounting shaft has a diameter approximately 20 to 30% of the inner diameter of the shank portion of said sample-receiving hollow needle.
Claim 9
Dependent Claim
56 words
The means for gathering soft tissue biopsy samples as defined in claim 1 being particularly characterized in that the inner diameter of said hollow core needle tapers inwardly at the outer tip end thereof so as to define a needle core opening having a diameter significantly less than the inner diameter of the shank portion thereof.
Claim 10
Dependent Claim
37 words
The means for gathering soft tissue biopsy samples as defined in claim 8 being particularly characterized in that said inner diameter of said hollow core needle tapers inwardly at an angle of between about 5* and 15*.
References Cited (Backward Citations)
US2844148A
Cited
US2869541A
Cited
US3330268A
Cited
US3470867A
Cited
US3540447A
Cited
US3628524A
Cited
US3727602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |