Cordless Hand-Held Ultrasonic Cautery Cutting Device
First Claim
1. An ultrasonic surgical assembly, comprising:
- an ultrasonic transducer operable to convert a received motional current into a movement of a cutting blade of an ultrasonic waveguide;
a measurement circuit connected in a parallel configuration with the ultrasonic transducer;
a variable power source operable to supply current through a set of connection points to the parallel configuration and thereby create the motional current in the ultrasonic transducer; and
a current controller operable to regulate the motional current by varying an output of the variable power source, thereby maintaining a substantially constant rate of movement of the cutting blade across a variety of cutting loads.
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Accused Products
Abstract
An ultrasonic surgical assembly includes an ultrasonic transducer operable to convert a received motional current into a movement of a cutting blade of an ultrasonic waveguide, a measurement circuit connected in a parallel configuration with the ultrasonic transducer, a variable power source operable to supply current through a set of connection points to the parallel configuration and thereby create the motional current in the ultrasonic transducer, and a current controller operable to regulate the motional current by varying an output of the variable power source, thereby maintaining a substantially constant rate of movement of the cutting blade across a variety of cutting loads.
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Citations
18 Claims
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1. An ultrasonic surgical assembly, comprising:
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an ultrasonic transducer operable to convert a received motional current into a movement of a cutting blade of an ultrasonic waveguide; a measurement circuit connected in a parallel configuration with the ultrasonic transducer; a variable power source operable to supply current through a set of connection points to the parallel configuration and thereby create the motional current in the ultrasonic transducer; and a current controller operable to regulate the motional current by varying an output of the variable power source, thereby maintaining a substantially constant rate of movement of the cutting blade across a variety of cutting loads. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An ultrasonic surgical assembly, comprising:
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an ultrasonic transducer operable to convert a received motional current into a movement of a cutting blade of an ultrasonic waveguide, the ultrasonic transducer having a first capacitance in a parallel configuration with a series configuration of a resistance, an inductance and a second capacitance, whereby the motional current flows through the series configuration; a third capacitance in a parallel configuration with the first capacitance; a variable power source coupled to the third capacitance and the ultrasonic transducer; and a current controller operable to regulate the motional current by varying an output of the variable power source based upon a product of the current flowing through the third capacitance multiplied by a ratio between a value of the first capacitance and a value of the third capacitance subtracted from a total current flowing into the ultrasonic transducer, thereby maintaining a substantially constant rate of movement of the cutting blade across a variety of cutting loads. - View Dependent Claims (11, 12, 13, 14)
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15. An ultrasonic surgical assembly, comprising:
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an ultrasonic transducer operable to convert a received motional current into a movement of a cutting blade of an ultrasonic waveguide; a removable battery; a disposable handle body having; a portion defining a battery-holding compartment shaped to removably receive the battery therein; and operable to removably couple the ultrasonic transducer to the ultrasonic waveguide, the ultrasonic transducer being separable from the handle body; the ultrasonic transducer having a first capacitance in a parallel configuration with a series configuration of a resistance, an inductance and a second capacitance, whereby the motional current flows through the series configuration; a third capacitance in a parallel configuration with the first capacitance; a variable power source coupled to the third capacitance and the ultrasonic transducer; and a current controller operable to regulate the motional current by varying an output of the variable power source based upon a product of the current flowing through the third capacitance multiplied by a ratio between a value of the first capacitance and a value of the third capacitance subtracted from a total current flowing into the ultrasonic transducer, thereby maintaining a substantially constant rate of movement of the cutting blade across a variety of cutting loads. - View Dependent Claims (16, 17)
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18. An ultrasonic surgical assembly, comprising:
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an ultrasonic transducer operable to convert a received motional current into a movement of a cutting blade of an ultrasonic waveguide; a measurement circuit connected in a parallel configuration with the ultrasonic transducer; a variable power source operable to supply current through a set of connection points to the parallel configuration and thereby create the motional current in the ultrasonic transducer, the variable power source comprising a removable battery; and a current controller operable to regulate the motional current by varying an output of the variable power source, thereby maintaining a substantially constant rate of movement of the cutting blade across a variety of cutting loads.
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Specification