US3705577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biopsy needle with eccentrically-mounted cutting tip
Assignee: Individual
•
Filing: 1969-12-22
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Granted: 1972-12-12
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Expires: 1989-12-22
Abstract
Abstract An improved surgical biopsy needle is adapted to facilitate precise and accurate control of the depth of penetration thereof, particularly when taking a biopsy of a patient''s pleura. The needle includes a specially designed tip, movable in relation to the main body of the pleura and then twisted to a position such that slight withdrawal of the tip will cause it to bear against the inner surface of the pleural to locate the tip against the pleura. Cutting elements are formed on the adjacent surfaces of the tip and the main body of the needle to thereafter cut a small sample of the pleura and enable its withdrawal together with the needle.
Inventors
- 👤 Rafael B Sierra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:28
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233; A61B10/0266; A61B10/0275
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
127 words
A biopsy needle comprising: an elongate body; a tip disposed at the forward end of said body, said tip having a forwardly extending end adapted to pass easily through tissue, the rear end of said tip and the forward end of said body being abuttingly matable; means mounting said tip to said body for movement longitudinally toward and away from the forward end of said body and for further movement in relation to said body to enable a portion of the rear surface of said tip to be disposed transversely of and out of alignment with said body; and means formed on said portion of said rear surface of said tip and the forward surface of said body for cooperatively cutting and retaining a tissue sample therebetween.
Claim 2
Dependent Claim
127 words
A biopsy needle comprising: an elongate body; a tip disposed at the forward end of said body, said tip having a forwardly extending end adapted to pass easily through tissue, the rear end of said tip and the forward end of said body being abuttingly matable; means mounting said tip to said body for movement longitudinally toward and away from the forward end of said body and for further movement in relation to said body to enable a portion of the rear surface of said tip to be disposed transversely of and out of alignment with said body; and means formed on said portion of said rear surface of said tip and the forward surface of said body for cooperatively cutting and retaining a tissue sample therebetween.
Claim 3
Dependent Claim
109 words
A biopsy needle as defined in claim 1 wherein said means mounting said tip and body for said relative movement comprises: a rod extending longitudinally through said body in offset relation to the longitudinal axis of said body; means for securing the forward end of said rod to said needle tip at a location offset from the longitudinal axis of said needle tip, said rod being disposed slideably and rotatably within said body; and said rod being of greater length than that of said body whereby the rearward end of said rod may extend rearwardly of said body to control the relative position of said body and said tip.
Claim 4
Dependent Claim
43 words
A biopsy needle as defined in claim 1 further comprising: the outer surfaces of said tip and said body, at least in the mating regions thereof being of identical contour to enable them to be mated to define a smooth continuous outer surface.
Claim 5
Dependent Claim
48 words
A biopsy needle as defined in claim 3 further comprising: said mating surfaces of said tip and said body being substantially complementary and lying in more than one plane, said complementary surfaces being arranged so that when mated, said transverse movement of said tip and body is precluded.
Claim 6
Dependent Claim
79 words
A biopsy needle as defined in claim 1 wherein said means for cutting and retaining said tissue sample comprises: said rearward surface of said tip and said forward surface of said body each having a concave cavity formed therein, each of said cavities being surrounded by and defined by a cutting edge, said cutting edges being adapted to be aligned and to be drawn together to cut said tissue therebetween and to retain said cut tissue between said cavities.
Claim 7
Dependent Claim
81 words
A biopsy needle as defined in claim 4 further comprising: the cutting edge on one of said facing surfaces projecting beyond the plane of its associated facing surface; the outer cutting edge on the other of said surfaces being recessed so that when said cutting edges are mated, the outer surfaces of said tip and body adjacent said facing surfaces thereof may be brought together to define a smooth continuous surface with said cutting edges being in alignment with each other.
Claim 8
Dependent Claim
71 words
A biopsy needle as defined in claim 1 further comprising: a screw threadably mounted to the rear end of said rod for adjustment longitudinally of and in spaced relation to said rod, the forward end of said screw being adapted to bear against the rear end of said body whereby advancement of said screw toward the rear end of said body will cause said tip and body to be brought together.
Claim 9
Dependent Claim
132 words
A method of performing a biopsy employing an apparatus as defined in claim 1 comprising: inserting said biopsy needle to a depth such that the tip thereof is disposed beyond the tissue from which said biopsy sample is to be taken; separating longitudinally said tip and said body so that said tissue is disposed therebetween; moving said tip so that said portion thereof is disposed transversely of said body; withdrawing said tip outwardly until the rear surface of said tip engages said tissue; aligning said body of saId needle with said tip while maintaining said tip in said last mentioned position; urging said body toward said tip while maintaining said aligned relation to cut said tissue and retain said cut portion of said tissue therebetween; and withdrawing said mated tip and body.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |