PHACO THERMAL CONTROL APPARATUS AND METHOD
4 Assignments
0 Petitions
Accused Products
Abstract
Control apparatus for an ultrasonic phacoemulsification handpiece utilizes flow rates and temperature measurements as well as power provided to a handpiece for calculating a matrix of power level duty cycle combination that would not generate sufficient heat to create a burn in eye tissue and either prevent operation of handpiece in the matrix or alert a surgeon of such use.
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Citations
16 Claims
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1-10. -10. (canceled)
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11. A phacoemulsification system for regulating fluid flow and energy into an eye during ocular surgery, comprising:
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a handpiece; and a control console configured to provide phaco power to the handpiece, irrigation fluid to an eye, and an aspiration source for removing fluid from the eye; a microprocessor configured to establish a correlation between a fluid flow through the eye, the phaco power, and heat generation in the eye without measuring fluid temperatures; the microprocessor configured to calculate an energy balance within the eye over a predetermined period of time, the calculation based upon a cumulative amount of phaco power delivered over the predetermined period of time and a cumulative amount of fluid removed from the eye over the predetermined period of time; the system configured to modulate at least one of a phaco power level, a phaco duty cycle, and the fluid flow through the eye, the modulation being based upon the energy balance. - View Dependent Claims (12, 13, 14)
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15. A phacoemulsification system for regulating fluid flow and energy into an eye during ocular surgery, comprising:
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a handpiece; a control console configured to provide phaco power to the handpiece, irrigation fluid to an eye, and an aspiration source for removing fluid from the eye; and a microprocessor configured to calculate an eye temperature based upon a cumulative amount of phaco power delivered over the predetermined period of time and a cumulative amount of fluid removed from the eye over the predetermined period of time.
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16. A method for regulating fluid flow and energy in a control console during ocular surgery, comprising:
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providing a handpiece and a control console having a microprocessor; determining cumulative phaco power delivered over a predetermined period of time; determining cumulative fluid removed from an eye over the predetermined period of time; determining the eye temperature based upon the cumulative phaco power and cumulative fluid removed from an eye over the predetermined period of time; calculating an energy balance over the predetermined period of time; and based upon the energy balance, modulating at least one of a phaco power level, a phaco duty cycle, and a fluid flow through the eye.
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Specification