US4766896A
Expired / Lapsed
US
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Anterior capsulotomy procedures
Assignee: Individual
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Filing: 1987-08-06
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Granted: 1988-08-30
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Expires: 2007-08-06
Abstract
Abstract Anterior capsulotomy procedures are performed by inserting a cystitome having a freely rotating stylus with blade through a relatively small initial limbal incision severing a central portion of the anterior capsule by one or more elongated incisions made entirely through the one small limbal incision including at least one elongated incision cutting the capsule along a path extending across a diametric axis through the center point of the anterior capsule and center of the initial incision.
Inventors
- 👤 David S. C. Pao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:44
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3209; A61B17/3211; A61F; A61F9/00; A61F9/007; A61F9/00736; A61F9/00754; A61F9/013; A61F9/0133
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
201 words
A method of performing an anterior capsulotomy on an eye with a cystitome having a rotating stylus comprising the steps of: (a) making a limbal incision in the eye; (b) severing a closed curvilinear central portion of an uncoagulated anterior capsule entirely through the initial limbal incision by at least two connected incisions in said anterior capsule including: a first elongated incision slicing along a curvilinear path passing across a diametric axis of said axis of said anterior capsule from an approximately 120° position and extending less than 180° around a center point of said anterior capsule to an approximately 240° position from said initial limbal incisions, said first elongated incision slicing including a slowing of movement of said cystitome between a 210° position and a 240° position, so that said rotating stylus is permitted to rotate and align itself with a direction of said movement so as to avoid tearing said anterior capsule, and a second elongated incision slicing along a curvilinear path passing across said diametric axis from an end of said first elongated incision to the other end of said first elongated incision, said first and second elongated incisions severing the closed curvilinear central portion of said capsule.
Claim 2
Independent Claim
201 words
A method of performing an anterior capsulotomy on an eye with a cystitome having a rotating stylus comprising the steps of: (a) making a limbal incision in the eye; (b) severing a closed curvilinear central portion of an uncoagulated anterior capsule entirely through the initial limbal incision by at least two connected incisions in said anterior capsule including: a first elongated incision slicing along a curvilinear path passing across a diametric axis of said axis of said anterior capsule from an approximately 120° position and extending less than 180° around a center point of said anterior capsule to an approximately 240° position from said initial limbal incisions, said first elongated incision slicing including a slowing of movement of said cystitome between a 210° position and a 240° position, so that said rotating stylus is permitted to rotate and align itself with a direction of said movement so as to avoid tearing said anterior capsule, and a second elongated incision slicing along a curvilinear path passing across said diametric axis from an end of said first elongated incision to the other end of said first elongated incision, said first and second elongated incisions severing the closed curvilinear central portion of said capsule.
Claim 3
Dependent Claim
33 words
The method of claim 1 wherein said second elongated incision comprises two smaller incisions wherein said first elongated incision and said two smaller incisions sever the closed curvilinear central portion of said capsule.
Claim 4
Dependent Claim
43 words
The method of claim 1 wherein said cystitome is slowed between a 210° position and a 240° position from said initial limbal incision to allow a cutting blade on the stylus to rotate and align with the direction of movement of said cystitome.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein said second elongated incision is started from the approximately 120° position.
Claim 6
Dependent Claim
19 words
The method of claim 1 wherein said rotating stylus is held substantially perpendicular to an anterior capsule incision plane.
Claim 7
Independent Claim
149 words
The method of performing an anterior capsulotomy on an eye with a cystitome having a rotating stylus comprising the steps of: (a) making a limbal incision in the eye; and (b) severing a closed curvilinear central portion of an uncoagulated anterior capsule entirely through the initial limbal incision by at least two connected incisions in said anterior capsule including: a first elongated incision slicing along a curvilinear path passing across a diametric axis of said anterior capsule from an approximately 120° position and extending more than 180° around a center point of said anterior capsule, and a second elongated incision slicing along a curvilinear path passing across said diametric axis from a point beginning near an end of said first elongated incision and spaced therefrom so as to maintain a bridge of anterior capsule between said end of said first elongated incision and the beginning of said second incision.
Claim 8
Independent Claim
149 words
The method of performing an anterior capsulotomy on an eye with a cystitome having a rotating stylus comprising the steps of: (a) making a limbal incision in the eye; and (b) severing a closed curvilinear central portion of an uncoagulated anterior capsule entirely through the initial limbal incision by at least two connected incisions in said anterior capsule including: a first elongated incision slicing along a curvilinear path passing across a diametric axis of said anterior capsule from an approximately 120° position and extending more than 180° around a center point of said anterior capsule, and a second elongated incision slicing along a curvilinear path passing across said diametric axis from a point beginning near an end of said first elongated incision and spaced therefrom so as to maintain a bridge of anterior capsule between said end of said first elongated incision and the beginning of said second incision.
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) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |