Method and device for subaqueous ultrasonic irradiation of living tissue
View Patent ↗Applicable to humans, animals and fish, a method for injecting thoroughly diffused ambient air or disinfectant into water prior to its delivery into a therapy tank plus an underwater PZT probe transmission of separate stable and transient cavitation signals from which a microcomputer determines, 1) the average number of transducer generated sinoidal equal amplitude alternating compression and rarefaction ultrasonic acoustic pressure waves cycles necessary to create inertial and/or transient cavitation and the required number of rectified sinoidal equal amplitude ultrasonic compression acoustic pressure waves necessary to suppress the inertial/transient cavitation and thereby maintain stable cavitation for cleaning and open-wound therapy treatment for 15-minutes, (or greater) time periods and, 2) the necessary dilution of water and disinfectant and its activation by dual-mode transient cavitation to kill the pathogens shed by the “patient” following “patient” cleaning or wound-therapy treatment.
1. An ultrasonic treatment method comprising:
feeding water to a tank;
introducing air in said water;
disposing at least a portion of a living terrestrial animal or human in the aerated water; and
thereafter ultrasonically generating stable vibrating bubbles in said aerated water;
using a sensor to determine the presence of transient or inertial cavitation in the tank;
the generating of said stable vibrating bubbles including energizing a transducer with periods of first full-wave compression and rarefaction cycles alternating with periods of first rectified-wave compression pressure cycles sufficient to suppress inertial or transient cavitation for a predetermined interval; and
using a signal from the sensor to determine a percentage or proportion of rectification of said electrical signal to obviate or avoid inertial or transient cavitation.
2. The method defined in claim 1 , further comprising automatically monitoring the aerated water in said tank to detect inertial or transient cavitation.
3. The method defined in claim 2 , further comprising displaying a status of inertial or transient cavitation in the aerated water in said tank.
4. The method defined in claim 1 , further comprising:
removing the terrestrial animal or human from said tank;
thereafter delivering disinfectant and water to said tank; and
thereafter inducing ultrasonic transient cavitation in the water and disinfectant in said tank.
5. The method defined in claim 4 wherein the inducing of said ultrasonic transient cavitation includes generating full-wave compression and rarefaction cycles at an ultrasonic frequency in the water and disinfectant in said tank.
6. The method defined in claim 5 wherein the inducing of said ultrasonic transient cavitation further includes sweeping said frequency.
7. The method defined in claim 1 wherein the periods of rectified-wave compression pressure cycles are less than about 40% of the total periods of full-wave compression and rarefaction cycles and periods of rectified-wave compression pressure cycles.
8. The method defined in claim 1 wherein the introducing of air in the water includes using a venturi injector disposed proximate to a bend in a feed pipe extending to said tank.
9. The method of claim 1 , wherein the treatment is wound debridement or cleaning.
10. The method of claim 1 , wherein the first full-wave compression and rarefaction cycles have a first amplitude or intensity and a first repetition period; and
further comprising subsequently energizing said transducer with periods of second full-wave compression and rarefaction cycles alternating with periods of second rectified-wave compression pressure cycles;
said second full-wave compression and rarefaction cycles having a second amplitude or intensity greater or less than a first amplitude or intensity and a second pulse repetition period respectively less or greater than said first pulse repetition period and said second rectified-wave compression pressure cycles having second amplitude or intensity and said second pulse repetition period so that said second full-wave compression and rarefaction cycles alternating with periods of second rectified-wave compression pressure cycles are sufficient to suppress inertial or transient cavitation for a predetermined interval.