Trapezius just caught me sleeping and talking a bit of nonsense, the 5 % duty cycle, of course, 0.08w / cm^2 is the (L) setting on US PRO 2000 2nd.
So here is the corrected reply:
“About the LIPUS they have used compatible intensity to 5% duty cycle we have with US Pro.
The difference to high-end machines used in studies being the pulse ratio 100Hz
(all cheap machinery), compared to 1000Hz on professional equipment for ED treatment.”
Additionally they have used pulse ratio not available with US PRO 2000 2nd.
With the machine, you suggested the 8% duty cycle(L) equals the 5% duty cycle(L) on US PRO 2000 2nd, both having a 0.5 ms pulse width.
US Pro 2000 having a 100Hz pulse frequency compared to US 1000 150Hz the difference in pulse modulation having the pulses coming 1,5 times more frequently both having output oscillating at 1MHz frequency.
This meaning the machines producing different duration rest times between the pulses.
There has been a lot of confusion around the pulsed output of these machines and the continuous waveform we use to heat tissue.
The thing is every ultrasound therapy machine has pulsed primary output. The difference is made with the modulation of the pulses.
Continuous mode equals 100% duty cycle meaning 100Hz pulses pulsing without modulation, each pulse oscillating in 1 MHz (secondary) output frequency at amplitude providing the 1.6 w/cm^2 average intensity without any rest times between the pulses. This example is the (H) setting of the US Pro 2000 2nd.
Then if we put the machine on a 5% duty cycle (L) the primary pulsing output is heavily modulated.
During the 100Hz(100 pulses a second) pulses each pulse is modulated having 0.5 ms pulse-width at the same amplitude the (H) setting, followed by 9.5 ms pulse duration rest time.
100 of these modulated pulses per second provide the average intensity output of 0.08 w/cm^2.
Pulse ratio being 1:19(5% duty cycle).
If we inspect the US Pro 1000 at 8% duty cycle it outputs 150 primary pulses per second oscillating at 1 MHz frequency. Pulses modulated in a form staying 0.5 ms at maximum amplitude followed swith a 5.5 ms rest time providing an average output intensity of 0.05 w/cm^2.
Pulse ratio being 1: 11 (8% duty cycle).
Chinese researchers have produced convincing studies using LIPUS machine with a 1: 4 pulse ratio(200mcs:800mcs) with 1000Hz pulsing primary frequency. They have found similar to L-ESWT (shock wave) treatment results treating mild to moderate ED with LIPUS. The average output intensity of 0.3w/ cm^2.
Also, there has been research confirming these LIPUS treatments 2 to 3 times a week for a duration of 16 treatments being safe, and similarly effective with no adverse effects found.
There are also studies with healthy volunteers using 1MHz and 3MHz machinery providing highly enhanced endothelial functions on the human brachial artery which is suspected to be a partial reason for success in the above LIPUS research as well.
These studies have been conducted with 1MHz machinery using both continuous modes with 0.4 w /cm^2 intensity.
Pulse modulated from with pulse ratio of 1:4 with 1000Hz pulsing equaling 20% duty cycle (2ms ON 8 ms OFF). With the pulsed output, the average intensity of 0.08w/cm^2 was applied.
No significant differences were detected between 1MHz or 3 MHz regardless being the pulse form is continuous or pulsed.
All led to positive outcomes in endothelial functions.
At these studies increase in NO production was detected to cause increased vasodilation lasting 20 minutes after the treatment.
For treating ED with light intensity pulsed ultrasound, there being no actual research available with 1MHz or 3MHz, the closest we can get is similar to LIPUS research(1.7MHz) intensity of 0.05 w/ cm^2 and pulse ratio of 1:4. The frequency between 1 to 3 MHz producing similar outcomes.
If we look at the US 1000 the 29% setting comes close, having 0.19 w/ cm^2 output intensity.
But another problem can occur. Having a 6.6 cm^2 ERA the diameter of 3 cm has to be in firm contact with the shaft which can be a problem with many of the shafts out there.
If we were about to utilize the ultrasound machinery optimizing for ED/EQ treatment only, I suggest purchasing a piece of better machinery having more options for adjustments.
START 18/13.15 cm Jul 24th 18 (7.09/5.18") NOW 22.5/15.2 cm Fer 12th 20 (8.86/5.98") GOAL 8.5"/ 6"
When connective tissue is stretched within therapeutic temperatures ranging 102 to 110 F (38.9- 43.3 C), the amount of structural weakening produced by a given amount of tissue elongation varies inversely with the temperature. This is apparently related to the progressive increase in the viscous flow properties of the collagenous tissue when it is heated. (Warren et al (1971,1976)