Patent US5722945A successfully refreshed from Google Patents.
US5722945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of tissue
Assignee: Alcon Inc
•
Filing: 1996-04-01
•
Granted: 1998-03-03
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Expires: 2016-04-01
Abstract
Abstract To reduce damage to surrounding tissue while fragmenting some tissue such as for example not damaging the capsular wall while removing the lens during cataract removal surgery or not damaging artery or vein walls during bypass surgery while freeing the artery or vein to be transplanted, an incision is made for the insertion of surface--a handpiece tip. The tiop is rotated and reciprocated ultrasonically at the same time so that tissue is fragmented by the combined motion of a fragmenting surface perpendicular to the surface and at an angle to the surface many times during a single revolution or part of a revolution.
Inventors
- 👤 Aziz Yehia Anis
- 👤 Mark Evan Steen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:18
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/00736; A61F9/00763; A61F9/00745
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
192 words
A method comprising the steps of: connecting a handpiece having a fragmenting tip to a source of control signals through an interface circuit; selecting the input impedance of the interface circuit to be placed in circuit between the source of control signals and the handpiece; obtaining at least one control signal from the interface circuit; inserting the fragmenting tip having fragmenting surfaces through an opening in the eye into the lens of an eye having a cataract and a capsular wall wherein the tip has at least one movable fragmenting surface; moving the fragmenting surface in a first direction and in at least a second direction; the step of moving the fragmenting surface in a first direction including the step of rotating the fragmenting surface at a first value of cycles per second; and the step of moving the fragmenting surface in a second direction including the step of reciprocating the fragmenting surface at a second value of cycles per second; said second value being different than the first value and being in the ultrasonic frequency range; said at least one signal controlling the amplitude of reciprocal movement of the operative tip.
Claim 2
Independent Claim
192 words
A method comprising the steps of: connecting a handpiece having a fragmenting tip to a source of control signals through an interface circuit; selecting the input impedance of the interface circuit to be placed in circuit between the source of control signals and the handpiece; obtaining at least one control signal from the interface circuit; inserting the fragmenting tip having fragmenting surfaces through an opening in the eye into the lens of an eye having a cataract and a capsular wall wherein the tip has at least one movable fragmenting surface; moving the fragmenting surface in a first direction and in at least a second direction; the step of moving the fragmenting surface in a first direction including the step of rotating the fragmenting surface at a first value of cycles per second; and the step of moving the fragmenting surface in a second direction including the step of reciprocating the fragmenting surface at a second value of cycles per second; said second value being different than the first value and being in the ultrasonic frequency range; said at least one signal controlling the amplitude of reciprocal movement of the operative tip.
Claim 3
Dependent Claim
62 words
A method according to claim 1 further including the steps of: positioning the fragmenting tip to impact the tissue of the cataract while it is moving at a velocity higher than the fragmenting velocity with respect to the capsular wall and at an angle to the cataract; whereby the cataract is fragmented but not the capsular wall; and aspirating the fragmented tissue.
Claim 4
Dependent Claim
45 words
A method according to claim 2 in which the step of inserting a fragmenting tip includes the substeps of: making a small incision less than 7 millimeters in diameter in the capsular sac along the margin; and inserting the fragmenting tip into the capsular sac.
Claim 5
Dependent Claim
73 words
A method according to claim 1 in which: the step of rotating the fragmenting surface includes the step of rotating the fragmenting surfaces about a longitudinal axis of the surface discriminating fragmenting tip; and the step of inserting the tip includes the step of inserting a tip with the longitudinal axis making an acute angle with the capsular wall wherein the rotating fragmenting surfaces impact the tissue of the cataract at an angle.
Claim 6
Dependent Claim
22 words
A method according to claim 1 in which the fragmenting tip is rotated with a power level of less than 1 horsepower.
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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) | 2001-03-02 | 2001-09-01 | 2002-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-02 | 2005-09-01 | 2006-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-02 | 2009-09-01 | 2010-03-03 | $7700.00 | Window Closed / Lapsed |