US4817599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
To and fro washing system and method
Assignee: Individual
•
Filing: 1987-12-30
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Granted: 1989-04-04
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Expires: 2007-12-30
Abstract
Abstract An autoclavable to and fro washing system and method of operation for use in extracapsular cataract surgery with and without infusion. A hand-held, motorized pump unit includes a reversing peristaltic pump for moving an IV solution back and forth through a hollow probe tip keeping the anterior chamber of the eye filled with fluid and safe from collapse, while the cortex of the cataract is emulsified using to and fro washing through the hollow probe tip and then flushed from the eye by the IV solution. Infusion and to and fro washing flow and pressure rates are proportionally varied by a switch on the hand held pump unit, or alternatively by a foot switch. An alternative embodiment includes a smaller and lighter hand piece, including a peristaltic pump and motor located remote from a hand piece and probe tip.
Inventors
- 👤 Robert C. Drews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:06
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/00736; A61F9/00745; A61B; A61B17/00; A61B2017/00973; A61B90/00; A61B90/08; A61B2090/0813
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
120 words
System for emulsifying cortex and/or nucleus in the capsular bag comprising: a. a housing including a body member; b. cannula means supported within said housing and including a configured hole at a tube end and a fluid port at a body member end; c. motor means including peristaltic pump therein connected to said fluid port; d. power means for said motor means; and, e. motor control means connected between said motor means and said power means for reciprocally powering said motor means in a to and fro rotating action, whereby said to and fro rotating action provides a to and fro washing action that emulsifies the cortex and/or nucleus lens material in and out of said hole in said cannula.
Claim 2
Dependent Claim
120 words
System for emulsifying cortex and/or nucleus in the capsular bag comprising: a. a housing including a body member; b. cannula means supported within said housing and including a configured hole at a tube end and a fluid port at a body member end; c. motor means including peristaltic pump therein connected to said fluid port; d. power means for said motor means; and, e. motor control means connected between said motor means and said power means for reciprocally powering said motor means in a to and fro rotating action, whereby said to and fro rotating action provides a to and fro washing action that emulsifies the cortex and/or nucleus lens material in and out of said hole in said cannula.
Claim 3
Dependent Claim
65 words
Process of infusion and to and fro washing for extracapsular cataract surgery comprising the steps a. initially stripping cortex in a capsular bag of an eye; b. washing cortex and/or nucleus in and out of a cannula in a to and fro washing action thereby emulsifying said cortex and/or nucleus; and, c. eliminating said emulsified cortex and/or nucleus from said capsular bag and said eye.
Claim 4
Dependent Claim
65 words
Process of infusion and to and fro washing for extracapsular cataract surgery comprising the steps a. initially stripping cortex in a capsular bag of an eye; b. washing cortex and/or nucleus in and out of a cannula in a to and fro washing action thereby emulsifying said cortex and/or nucleus; and, c. eliminating said emulsified cortex and/or nucleus from said capsular bag and said eye.
Claim 5
Dependent Claim
25 words
Process of claim 2 wherein said eliminating step comprises the step of infusing an excess amount of fluid into said eye in a washing cycle.
Claim 6
Dependent Claim
11 words
Process of claim 2 wherein said emulsifying action is subsonic phakoemulsification.
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) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |