US5735867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Working cannula for arthroscopy
Assignee: Arthrocare Corp
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Filing: 1996-07-29
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Granted: 1998-04-07
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Expires: 2016-07-29
Abstract
Abstract A working cannula for arthroscopy, in particular of the shoulder and the knee, comprising a tube and a removable closure pin member (trocar) which is guided in the tube, wherein the tube has an external screwthread which is continued by a screwthread of the tip, which projects beyond the tube, of the closure pin member. The closure pin member has a central bore extending therethrough, for receiving a guide wire. The closure pin member locks on to the tube so that when the closure pin is rotated, the tube rotates to facilitate anchoring of the screwthread into a patient.
Inventors
- 👤 Karl Golser
- 👤 Gernot Sperner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:13
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/065; A61B; A61B17/00; A61B17/34; A61B17/3417; A61M25/0606; A61B2017/348; A61B2017/3482; A61B2017/349
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
100 words
An arthroscopic device for performing arthroscopic procedures comprising a cannula and a trocar, said cannula defining a central bore adapted to receive said trocar, said trocar defining a central bore for receiving a guidewire, said cannula having screw threads at its distal end, said trocar having screw threads at its distal end, said cannula and said trocar being designed so that when said trocar is inserted to its fullest extent in the central bore of said cannula, the distal ends of said trocar and said cannula form a continuous thread pattern located on the distal end of said arthroscopic device.
Claim 2
Dependent Claim
100 words
An arthroscopic device for performing arthroscopic procedures comprising a cannula and a trocar, said cannula defining a central bore adapted to receive said trocar, said trocar defining a central bore for receiving a guidewire, said cannula having screw threads at its distal end, said trocar having screw threads at its distal end, said cannula and said trocar being designed so that when said trocar is inserted to its fullest extent in the central bore of said cannula, the distal ends of said trocar and said cannula form a continuous thread pattern located on the distal end of said arthroscopic device.
Claim 3
Dependent Claim
29 words
The device as set forth in claim 1 wherein the cannula includes an inlet for fluids through its sidewall in fluid communication with the central bore in the cannula.
Claim 4
Dependent Claim
77 words
An arthroscopic device for performing arthroscopic procedures comprising a cannula and a trocar, said cannula defining a central bore adapted to receive said trocar, said trocar defining a central bore for receiving a guidewire, said trocar including a protrusion which mates with a recess included in said cannula such that when said trocar is fully inserted in said cannula, said trocar is locked in position inside said cannula and said cannula rotates when said trocar is turned.
Claim 5
Dependent Claim
77 words
An arthroscopic device for performing arthroscopic procedures comprising a cannula and a trocar, said cannula defining a central bore adapted to receive said trocar, said trocar defining a central bore for receiving a guidewire, said trocar including a protrusion which mates with a recess included in said cannula such that when said trocar is fully inserted in said cannula, said trocar is locked in position inside said cannula and said cannula rotates when said trocar is turned.
Claim 6
Dependent Claim
29 words
The device as set forth in claim 3 wherein the cannula includes an inlet for fluids through its sidewall in fluid communication with the central bore in the cannula.
Claim 7
Dependent Claim
76 words
In a device for performing arthroscopic procedures of the type which includes a cannula and a trocar, wherein the improvement comprises screwthreads on the cannula which mate with screwthreads on the trocar when the trocar is inserted in the cannula and being further characterized in that the cannula and the trocar can be locked together so that when the trocar is rotated, the cannula also rotates to facilitate the screwthreads securing the cannula to a patient.
Claim 8
Dependent Claim
76 words
In a device for performing arthroscopic procedures of the type which includes a cannula and a trocar, wherein the improvement comprises screwthreads on the cannula which mate with screwthreads on the trocar when the trocar is inserted in the cannula and being further characterized in that the cannula and the trocar can be locked together so that when the trocar is rotated, the cannula also rotates to facilitate the screwthreads securing the cannula to a patient.
Claim 9
Independent Claim
114 words
A method for performing an arthroscopic procedure, comprising the following steps; 1) inserting a guidewire into the desired location in a patient, 2) providing a cannula surrounding a trocar with screw threads on the distal ends of both the cannula and the trocar, said trocar having a center bore to accommodate the guidewire, 3) locking the trocar and the cannula to form an arthroscopic device so that when the trocar is rotated the cannula also rotates, 4) positioning the guidewire through the trocar, 5) securing the device to the patient by rotating the trocar, and 6) removing said guidewire and said trocar to leave the cannula screwed in place to facilitate the arthroscopic procedure.
Claim 10
Independent Claim
114 words
A method for performing an arthroscopic procedure, comprising the following steps; 1) inserting a guidewire into the desired location in a patient, 2) providing a cannula surrounding a trocar with screw threads on the distal ends of both the cannula and the trocar, said trocar having a center bore to accommodate the guidewire, 3) locking the trocar and the cannula to form an arthroscopic device so that when the trocar is rotated the cannula also rotates, 4) positioning the guidewire through the trocar, 5) securing the device to the patient by rotating the trocar, and 6) removing said guidewire and said trocar to leave the cannula screwed in place to facilitate the arthroscopic procedure.
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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) | 2001-04-06 | 2001-10-06 | 2002-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-06 | 2005-10-06 | 2006-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-06 | 2009-10-06 | 2010-04-07 | $7700.00 | Window Closed / Lapsed |