Claims
- 1. A method for surgically affecting tissue in an animal by applying ultrasonic frequency vibratory energy comprising:applying a first profile of a pulse of ultrasonic frequency vibratory energy said first profile having a maximum amplitude during a first time portion; applying a second profile of a pulse of ultrasonic frequency vibratory energy said second profile having a minimum amplitude during a second time portion wherein; the first time portion is between one millisecond and fifty milliseconds in duration; the second time portion is at least three times greater than the first time portion; and the maximum amplitude is in the range between two to twenty times the minimum amplitude; and repeating the application of said first and second profiles of a pulse of ultrasonic frequency vibratory energy.
- 2. The method of claim 1 wherein said second time portion is between four and ten times the duration of the first time portion.
- 3. The method of claim 1 wherein the first profile is monotonically increasing and the second profile is monotonically decreasing.
- 4. The method of claim 1 wherein said pulse has a shape substantially as shown in FIG. 2c.
- 5. The method of claim 1 wherein said pulse is generated no more than twenty times per second.
- 6. The method of claim 5 wherein said pulse is generated no more than ten times per second.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation of and claims priority to U.S. application Ser. No. 09/260,297, which was filed Mar. 2, 1999 now U.S. Pat. No. 6,027,515.
US Referenced Citations (7)
Non-Patent Literature Citations (1)
Entry |
Analog Devices 1992 Special Linear Reference Manual application notes for AD633. pp. 2-52;53. |
Continuations (1)
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Number |
Date |
Country |
Parent |
09/260297 |
Mar 1999 |
US |
Child |
09/476879 |
|
US |