EP0221007B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Thin-needle biopsy cannule with a mandrel
Assignee: Individual
•
Filing: 1986-10-30
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Granted: 1990-12-27
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Expires: 2006-10-30
Abstract
No abstract record available.
Inventors
- 👤 Heiko Dr. Lübbers
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 18:08
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233; A61B10/0283
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
161 words
1 Biopsy set comprising a cannula (11) having a ground main bevel (12) with small bevel angle, and a surrounding cutting edge (45), and a cylindrical stylet (17) secured against rotation with respect to the cannula (11) and protruding beyond the ground main bevel (12) of the cannula, said stylet (17) having a stylet tip (19), the cannula (11) being adapted to be advanced beyond the stylet for collecting a sample, characterized in that the stylet (17) is provided with a ground main bevel (18) with its bevel angle and orientation corresponding to those of the ground main bevel (12) of the cannula (11), that the stylet tip (19) is formed by a ground portion (20) ground to the ground main bevel (18) of the stylet, and that the cannula (11) has a cannula tip (28) being formed by ground rear facettes (13) of the cutting edge (45), which are ground up to the inner lumen (22) of the cannula (11).
Claim 2
Dependent Claim
161 words
1 Biopsy set comprising a cannula (11) having a ground main bevel (12) with small bevel angle, and a surrounding cutting edge (45), and a cylindrical stylet (17) secured against rotation with respect to the cannula (11) and protruding beyond the ground main bevel (12) of the cannula, said stylet (17) having a stylet tip (19), the cannula (11) being adapted to be advanced beyond the stylet for collecting a sample, characterized in that the stylet (17) is provided with a ground main bevel (18) with its bevel angle and orientation corresponding to those of the ground main bevel (12) of the cannula (11), that the stylet tip (19) is formed by a ground portion (20) ground to the ground main bevel (18) of the stylet, and that the cannula (11) has a cannula tip (28) being formed by ground rear facettes (13) of the cutting edge (45), which are ground up to the inner lumen (22) of the cannula (11).
Claim 3
Dependent Claim
35 words
Biopsy set according to claim 1, characterized in that the rear end (48) of the stylet (17) is connected to the piston rod (36) of an aspiration syringe (37) having the cannula (11) mounted thereon.
Claim 4
Dependent Claim
36 words
Biopsy set according to claim 1 or 2, characterized in that the rear end (48) of the stylet (17) is provided with a handle secured against rotation with respect to the handle of the cannula (11).
Claim 5
Dependent Claim
47 words
4 Biopsy set according to any one of claims 1 to 3, characterized in that the ground portion (20) of the stylet (17) has a grinding length (15a) constituting a portion of less than 50% of the length of the ground main bevel (18) of the stylet.
Claim 6
Dependent Claim
40 words
Biopsy set according to any one of claims 1 to 4, characterized in that the ground main bevel (12) of the cannula (11) has a bevel angle of 20° to 30°, preferably 25°, with respect to the longitudinal axis thereof.
Claim 7
Dependent Claim
23 words
Biopsy set according to any one of claims 1 to 5, characterized in that the stylet (17) is provided as a hollow stylet.
Claim 8
Dependent Claim
46 words
Biopsy set according to any one of claims 2 to 6, characterized in that, in the area of the syringe piston (36), the stylet (17) provided as a hollow stylet is connected to the inner space (47) of the aspiration syringe (37) via transverse bores (39).
Claim 9
Dependent Claim
23 words
Biopsy set according to any one of claims 1 to 5, characterized in that the stylet (17) is provided as a full stylet.
Claim 10
Dependent Claim
31 words
Biopsy set according to any one of claims 1 to 8, characterized in that the ground main bevel (18) of the stylet (17) is formed as an asymmetrical trocar bevel (21).
References Cited (Backward Citations)
DE1817555A1
Cited
JPS5652575A
Cited
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