Closed loop temperature controlled phacoemulsification system to prevent corneal burns
First Claim
1. Phacoemulsification apparatus comprising:
- a phacoemulsification handpiece having a needle and electrical means for ultrasonically vibrating said needle;
power source means for providing electrical power to the handpiece electrical means;
means for providing irrigation fluid to the handpiece needle and aspirating fluid from the handpiece needle;
means for sensing a temperature of the handpiece needle; and
control means for varying a power level provided to the handpiece electrical means from said power source means in response to the needle temperature.
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Accused Products
Abstract
Phacoemulsification apparatus includes a handpiece having a needle and electrical apparatus for ultrasonically vibrating the needle. A power source provides electrical power to the handpiece electrical apparatus and irrigation fluid is provided to the handpiece needle and aspirated therefrom during phacoemulsification. Temperature sensors are provided for determining the temperature of the handpiece needle and a control unit is provided for varying a power level provided the handpiece electrical apparatus and the power source in response to the needle temperature. Alternatively, the control unit functions to vary either irrigation fluid flow or aspiration fluid flow from the handpiece in response to the needle temperature.
143 Citations
12 Claims
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1. Phacoemulsification apparatus comprising:
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a phacoemulsification handpiece having a needle and electrical means for ultrasonically vibrating said needle;
power source means for providing electrical power to the handpiece electrical means;
means for providing irrigation fluid to the handpiece needle and aspirating fluid from the handpiece needle;
means for sensing a temperature of the handpiece needle; and
control means for varying a power level provided to the handpiece electrical means from said power source means in response to the needle temperature. - View Dependent Claims (2, 5, 6, 7, 8)
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3. Phacoemulsification apparatus comprising:
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a phacoemulsification handpiece having a needle and electrical means for ultrasonically vibrating said needle;
power source means for providing electrical power to the handpiece electrical means;
means for providing irrigation fluid to the handpiece needle and aspirating fluid from the handpiece needle;
means for sensing a temperature of the handpiece needle; and
control means for varying an irrigation fluid rate provided to the handpiece in response to the needle temperature.
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4. Phacoemulsification apparatus comprising:
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a phacoemulsification handpiece having a needle and electrical means for ultrasonically vibrating said needle;
power source means for providing electrical power to the handpiece electrical means;
means for providing irrigation fluid to the handpiece needle and aspirating fluid from the handpiece needle;
means for sensing a temperature of the handpiece needle; and
control means for varying an aspiration fluid rate from the handpiece needle in response to the needle temperature.
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9. A method for operating a phacoemulsification system, the system including a phacoemulsification handpiece needle, an ultrasonic power source, a vacuum source, a source of irrigating fluid, and a control unit for controlling ultrasonic power provided to the handpiece needle and the aspiration of irrigating fluid from the handpiece needle, said operating method comprising the steps of:
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(a) placing the handpiece needle in an operative relationship with an eye for a phacoemulsification procedure;
(b) supplying irrigation fluid from the irrigation fluid source to and through the handpiece needle and into said eye;
(c) providing ultrasonic power from the ultrasonic power source to the handpiece needle for performing the phacoemulsification procedure;
(d) applying vacuum from the vacuum source to the handpiece needle and thereby aspirating the irrigating fluid from the eye through the handpiece needle at a selected rate;
(e) sensing a temperature of the handpiece needle; and
(f) controlling, in response to the needle temperature, the ultrasonic power being provided to the handpiece needle. - View Dependent Claims (10)
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11. A method for operating a phacoemulsification system, the system including a phacoemulsification handpiece needle, an ultrasonic power source, a vacuum source, a source of irrigating fluid, and a control unit having a vacuum sensor for controlling ultrasonic power provided to the handpiece needle and the aspiration of irrigating fluid from the handpiece needle, said operating method comprising the steps of:
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(a) placing the handpiece needle in an operative relationship with an eye for a phacoemulsification procedure;
(b) supplying irrigation fluid from the irrigation fluid source to and through the handpiece needle and into said eye;
(c) Providing ultrasonic power from the ultrasonic power source to the handpiece needle for performing the phacoemulsification procedure;
(d) applying vacuum from the vacuum source to the handpiece needle and thereby aspirating the irrigating fluid from the eye through the handpiece needle at a selected rate;
(e) sensing a temperature of the handpiece needle; and
(f) controlling, in response to the needle temperature, the irrigation fluid flow being supplied to the handpiece needle.
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12. A method for operating a phacoemulsification system, the system including a phacoemulsification handpiece needle, an ultrasonic power source, a vacuum source, a source of irrigating fluid, and a control unit having a vacuum sensor for controlling ultrasonic power provided to the handpiece needle and the aspiration of irrigating fluid from the handpiece needle, said operating method comprising the steps of:
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(a) placing the handpiece needle in an operative relationship with an eye for a phacoemulsification procedure;
(b) supplying irrigation fluid from the irrigation fluid source to and through the handpiece needle and into said eye;
(c) providing ultrasonic power from the ultrasonic power source to the handpiece needle for performing the phacoemulsification procedure;
(d) applying vacuum from the vacuum source to the handpiece needle and thereby aspirating the irrigating fluid from the eye through the handpiece needle at a selected rate;
(e) sensing a temperature of the handpiece needle; and
(f) controlling, in response to the needle temperature, the vacuum being applied to the handpiece needle.
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Specification