Anti-repulsion anti-clogging system and method for driving a dual-axis lensectomy probe
First Claim
1. An anti-repulsion anti-clogging system for a dual-axis lensectomy handpiece comprising:
- a. a microcontroller,b. a dual axis operable lensectomy handpiece,c. a programmable clock generator,d. a programmable power supply,whereby said microcontroller commands said programmable clock generator to operate said lensectomy handpiece to produce bursts of axial ultrasonic oscillatory activity intercalated with bursts of rotational ultrasonic oscillatory activity, andwhereby said microcontroller commands said programmable power supply in a way that the envelope of each of said bursts of axial oscillatory activity can be amplitude modulated.
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Abstract
An anti-repulsion anti-clogging system for a dual axis lensectomy handpiece consisting in power modulation of bursts of axial oscillatory activity intercalated between bursts of rotational oscillatory activity. Power modulation of the axial bursts comprises reduction of the rise speed of the attack portion of the envelope below 0.75 mils per millisecond. Alternatively power modulation can be in the form of intercalation of a train of pulses of axial oscillations between the bursts of rotational oscillatory activity. The pulses composing the intercalated train can be of equal or different amplitudes. Repulsion of lens fragments is significantly reduced by power modulating the axial pulses intercalated between the rotational pulses as described in the present invention.
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Citations
11 Claims
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1. An anti-repulsion anti-clogging system for a dual-axis lensectomy handpiece comprising:
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a. a microcontroller, b. a dual axis operable lensectomy handpiece, c. a programmable clock generator, d. a programmable power supply, whereby said microcontroller commands said programmable clock generator to operate said lensectomy handpiece to produce bursts of axial ultrasonic oscillatory activity intercalated with bursts of rotational ultrasonic oscillatory activity, and whereby said microcontroller commands said programmable power supply in a way that the envelope of each of said bursts of axial oscillatory activity can be amplitude modulated. - View Dependent Claims (2, 3)
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4. An anti-repulsion anti-clogging system for operating a dual-axis lensectomy handpiece comprising:
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a. a microcontroller, b. a dual axis operable lensectomy handpiece, c. a programmable clock generator, d. a programmable power supply, whereby said microcontroller commands said programmable clock generator to operate said lensectomy handpiece to produce bursts of axial ultrasonic oscillatory activity intercalated with bursts of ultrasonic rotational oscillatory activity, and whereby said microcontroller commands said programmable power supply in a way that a train of bursts of axial ultrasonic oscillatory activity is intercalated between said bursts of rotational ultrasonic oscillatory activity. - View Dependent Claims (5, 6, 7)
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8. A method to reduce repulsion and chatter of lens fragments at the tip of a lensectomy probe while operating a dual axis ultrasonic lensectomy handpiece comprising the steps of:
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a. providing a microcontroller, b. providing a dual axis operable lensectomy handpiece, c. providing a programmable clock generator, d. providing a programmable power supply, e. programming said microcontroller to command said clock generator to deliver bursts of axial ultrasonic oscillatory activity intercalated with bursts of rotational ultrasonic oscillatory activity, e. programming said microcontroller to command said programmable power supply to modulate the amplitude of the envelope of said bursts of axial ultrasonic oscillatory activity. - View Dependent Claims (9, 10, 11)
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Specification