Pulsed mode lysis method
First Claim
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1. A method of applying therapeutic ultrasound to a location within a body, comprising:
- activating a transducer to produce ultrasound at a pulse repetition period of T≦
1000 milliseconds and directing this ultrasound to a location within a body and at appropriate power, frequency and pulse duration, to generate cavitation at the location.
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Abstract
An apparatus and method for the application of ultrasound to a location within the body is provided. The apparatus can advantageously operate at a pulse duration below about 100 milliseconds and in the range 0.1 milliseconds to 100 milliseconds and a pulse repetition period below about 1 second and in the range of 1 millisecond to 1 second. Duty ratios over 5 and preferably over 8 are also advantageous. Therapeutic applications of ultrasound such as for assisting in the treatment of medical conditions such as cancer and/or other ailments are also provided.
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Citations
32 Claims
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1. A method of applying therapeutic ultrasound to a location within a body, comprising:
- activating a transducer to produce ultrasound at a pulse repetition period of T≦
1000 milliseconds and directing this ultrasound to a location within a body and at appropriate power, frequency and pulse duration, to generate cavitation at the location. - View Dependent Claims (2, 3, 4)
- activating a transducer to produce ultrasound at a pulse repetition period of T≦
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5. A method of applying therapeutic ultrasound to a location within a body, comprising:
- producing ultrasound with a pulse duration of τ
≦
100 milliseconds and transmitting the ultrasound to a location within a body via a transmission member which is at least partially inserted into the body and applying said ultrasound under conditions of appropriate power, frequency pulse duration τ and
pulse repetition period T, so as to generate cavitation at the location. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
- producing ultrasound with a pulse duration of τ
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22. A method of applying therapeutic ultrasound to a location within a body, comprising:
- activating a transducer to produce ultrasound at a pulse repetition period of T≦
1000 milliseconds and directing this ultrasound to a location within a body;
initiating cavitation at the location within the body by applying a first amount of power to the transducer, then reducing the power supplied, while maintaining cavitation. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
- activating a transducer to produce ultrasound at a pulse repetition period of T≦
Specification