Temperature controlled ultrasonic surgical instruments
First Claim
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1. A surgical instrument, comprising:
- a transducer configured to produce vibrations at a predetermined drive frequency;
an ultrasonic blade coupled to the transducer;
an ultrasonic transmission waveguide coupled between the transducer and the ultrasonic blade;
a controller to receive a feedback signal from at least the ultrasonic blade, wherein the feedback signal is a frequency variation between the predetermined drive frequency of the transducer and a resonant frequency of the transducer, wherein the frequency variation is measured by the controller, wherein the controller is configured to receive the feedback signal to measure and control a temperature of the ultrasonic blade, and wherein the resonant frequency of the transducer decreases as a temperature of at least the ultrasonic blade increases; and
a lumen extending continuously at least through the ultrasonic blade, wherein the controller is configured to control fluid flow through the lumen when the resonant frequency of the transducer decreases, and wherein the lumen is adapted to couple to a fluid temperature regulator.
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Abstract
A surgical instrument includes a transducer configured to produce vibrations at a predetermined frequency. An ultrasonic blade extends along a longitudinal axis and is coupled to the transducer. A controller receives a feedback signal from the ultrasonic blade. A lumen is adapted to couple to a pump. The lumen conducts a fluid therethrough based on the feedback signal.
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Citations
14 Claims
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1. A surgical instrument, comprising:
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a transducer configured to produce vibrations at a predetermined drive frequency; an ultrasonic blade coupled to the transducer; an ultrasonic transmission waveguide coupled between the transducer and the ultrasonic blade; a controller to receive a feedback signal from at least the ultrasonic blade, wherein the feedback signal is a frequency variation between the predetermined drive frequency of the transducer and a resonant frequency of the transducer, wherein the frequency variation is measured by the controller, wherein the controller is configured to receive the feedback signal to measure and control a temperature of the ultrasonic blade, and wherein the resonant frequency of the transducer decreases as a temperature of at least the ultrasonic blade increases; and a lumen extending continuously at least through the ultrasonic blade, wherein the controller is configured to control fluid flow through the lumen when the resonant frequency of the transducer decreases, and wherein the lumen is adapted to couple to a fluid temperature regulator. - View Dependent Claims (2, 3, 4)
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5. A surgical instrument, comprising
a transducer configured to produce vibrations at a predetermined drive frequency; -
an ultrasonic blade coupled to the transducer; an ultrasonic transmission waveguide coupled between the transducer and the ultrasonic blade; a controller to receive a feedback signal from at least the ultrasonic blade, wherein the feedback signal is measured by the controller; and
wherein the controller detects a tissue load of the ultrasonic blade;a lumen extending continuously at least through the ultrasonic blade, wherein the controller is configured to control fluid flow through the lumen when the resonant frequency of the transducer decreases, and wherein the lumen is configured to couple to a fluid temperature regulator; and a temperature sensor to measure the temperature of the ultrasonic blade and to provide the feedback signal, wherein the feedback signal is proportional to the temperature of the ultrasonic blade.
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6. A system, comprising:
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a transducer configured to produce vibrations at a predetermined frequency; an ultrasonic blade; an ultrasonic transmission waveguide coupled between the transducer and the ultrasonic blade; a controller to receive a feedback signal from the ultrasonic blade, wherein the feedback signal is derived from frequency variations of the ultrasonic blade from the predetermined frequency, wherein the controller is configured to receive the feedback signal to measure and control a temperature of the ultrasonic blade, and wherein the feedback signal is proportional to the temperature of at least the ultrasonic blade; a lumen extending continuously at least through the ultrasonic blade, wherein the resonant frequency of the transducer decreases as a temperature of at least the ultrasonic blade increases, and wherein the controller is configured to control fluid flow through the lumen when the resonant frequency of the transducer decreases; and a fluid temperature regulator in electrical communication with the controller, wherein the lumen is coupled to the fluid temperature regulator. - View Dependent Claims (7, 8)
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9. A surgical instrument, comprising:
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a transducer configured to produce vibrations at a predetermined frequency; a signal generator coupled to the transducer; an ultrasonic blade; an ultrasonic transmission waveguide coupled between the transducer and the ultrasonic blade; a controller to receive a feedback signal from the ultrasonic blade, wherein the feedback signal is derived from frequency variations of the ultrasonic blade from the predetermined frequency, wherein the controller is configured to receive the feedback signal to measure and control a temperature of the ultrasonic blade, and wherein the feedback signal is proportional to the temperature of at least the ultrasonic blade; and a lumen extending continuously at least through the ultrasonic blade, wherein the controller is configured to control fluid flow through the lumen when the resonant frequency of the transducer decreases, wherein the resonant frequency of the transducer decreases as a temperature of at least the ultrasonic blade increases, and wherein the lumen is adapted to couple to a fluid temperature regulator. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification