US6939317B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Repetitive progressive axial displacement pattern for phacoemulsifier needle tip
Assignee: Individual
•
Filing: 2004-08-10
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Granted: 2005-09-06
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Expires: 2024-08-10
Abstract
Abstract A method to improve phacoemulsification efficiency by providing bursts of axial ultrasonic activity in synchronization with a fraction of a lower frequency axial oscillatory activity, the fraction corresponding to the portion of the low frequency signal that displaces toward the lens fragments and distally from the phacoemulsification hand-piece. Ultrasonic bursts synchronized with displacement of the phacoemulsification needle tip toward the lens tissue increases efficiency allowing the reduction of the required ultrasonic power minimizing heat generation and cavitation.
Inventors
- 👤 Jaime Zacharias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:54
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/00736; A61F9/00745
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A method to improve the efficiency of a phacoemulsification system by delivering a burst of ultrasonic power synchronized with a fraction of a low frequency motion waveform at a phacoemulsification needle tip, the method comprising: selecting an ultrasonic electro-mechanic actuator to axially oscillate a phacoemulsifier needle at ultrasonic frequency; selecting a low frequency electro-mechanic actuator to axially oscillate a phacoemulsifier needle at low frequency; mechanically combining the ultrasonic electro-mechanic actuator and the low frequency electro-mechanic actuator to obtain an axial phacoemulsification needle displacement pattern corresponding to the combined action of both ultrasonic and low frequency electro-mechanic actuators; selecting a low frequency driver signal waveform to oscillate the low frequency electro-mechanic actuator; selecting an ultrasonic driver signal waveform to oscillate the ultrasonic electro-mechanic actuator; detecting a phase and position signal of the low frequency electro-mechanic actuator to synchronize bursts of ultrasonic actuator activity; in a way that bursts of axial ultrasonic activity of the phacoemulsifier needle are repeatedly produced in synchronization with a fraction of each low frequency electro-mechanic actuator cycle.
Claim 2
Independent Claim
170 words
A method to improve the efficiency of a phacoemulsification system by delivering a burst of ultrasonic power synchronized with a fraction of a low frequency motion waveform at a phacoemulsification needle tip, the method comprising: selecting an ultrasonic electro-mechanic actuator to axially oscillate a phacoemulsifier needle at ultrasonic frequency; selecting a low frequency electro-mechanic actuator to axially oscillate a phacoemulsifier needle at low frequency; mechanically combining the ultrasonic electro-mechanic actuator and the low frequency electro-mechanic actuator to obtain an axial phacoemulsification needle displacement pattern corresponding to the combined action of both ultrasonic and low frequency electro-mechanic actuators; selecting a low frequency driver signal waveform to oscillate the low frequency electro-mechanic actuator; selecting an ultrasonic driver signal waveform to oscillate the ultrasonic electro-mechanic actuator; detecting a phase and position signal of the low frequency electro-mechanic actuator to synchronize bursts of ultrasonic actuator activity; in a way that bursts of axial ultrasonic activity of the phacoemulsifier needle are repeatedly produced in synchronization with a fraction of each low frequency electro-mechanic actuator cycle.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2008-09-05 | 2009-03-07 | 2009-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-09-05 | 2013-03-07 | 2013-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-09-05 | 2017-03-07 | 2017-09-06 | $7700.00 | Window Closed / Lapsed |