The pro-metabolic effects of ultrasound
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@CrumblingCookie said in The pro-metabolic effects of ultrasound:
on as I remember studies which very clearly found that long enough ultrasonography (only 5-15 minutes iirc) on the testicles leads to infertility for about 1/2 year due to profoundly impaired spermatogenesis.
Source?
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@Mauritio said:
Source?
From https://healthland.time.com/2012/01/31/sonic-sperm-could-ultrasound-be-the-next-male-contraceptive/
“When we treated the rats in the study, it only took two weeks to shut down a process that is essential to the survival of any species,” says Tsuruta. “Males produce millions of sperm every day. So it’s a very, very robust system. To be able to turn that off — we are really excited to learn how this actually works.”
Ultrasound generates heat by physically vibrating tissues with sound waves — similar to the way that microwave energy shakes up water molecules to heat up food. But the sound waves may also be working at a deeper level to change the tissues they affect; Tsuruta says when he compared rat testes exposed to ultrasound to testes heated to the same temperature without ultrasound, the ultrasound-treated testes showed a 10 times greater drop in sperm concentration.
Research by other scientists suggests that ultrasound may disrupt the proteins in cells and even their gene expression, leading to alterations in the way these cells work. “Ultrasound can definitely change [the cells’] state,” he says. “So to learn whether any of these things are happening if we use ultrasound as contraceptive is going to need future studies.”
In the study, the rats’ testes were exposed to high frequency ultrasound at 3 MHz for 15 minutes each, two days apart. The sessions were enough to kill the existing sperm in the testes and stop the development of additional sperm. The first study to look at the effect of ultrasound on sperm production, in the 1970s, showed that the depletion was temporary, and Tsuruta hopes his studies will show the same result."which probably reports on this study:
Therapeutic ultrasound as a potential male contraceptive: power, frequency and temperature required to deplete rat testes of meiotic cells and epididymides of sperm determined using a commercially available systemThe current treatment regimen provided nominally more energy to the treatment chamber than Fahim's originally reported conditions of 1 MHz ultrasound delivered at 1 Watt per square cm for ten minutes. However, the true spatial average intensity, effective radiating area and power output of the transducers used by Fahim were not reported, making a direct comparison impossible. We found that germ cell depletion was most uniform and effective when we rotated the therapeutic transducer to mitigate non-uniformity of the beam field.
The latter raises more potential questions as it suggests that the composition and uniformity of the ultrasonic field may be just as decisive as the energy intensity. Sort of like with mobile phone radiation (and with ultrasound, we are up in similar MHz ranges) where trees directly next to the antenna often appear alright but those at a farther distance (much lower energy intensity) can show thinned growth and early loss of leaves on one side clearly pinpointing the direction to the next radiation tower.
In this other study the greater effectiveness of the "cup-method" also suggests a significant impact of a (uniform) ultrasonic field.
The applied energy intensity was high at 2.5W/cm².
The efficacy of ultrasound treatment as a reversible male contraceptive in the rhesus monkey"Two methods of ultrasound exposure were used, either the transducer probe at the bottom of a cup filled with saline (Cup) or direct application to the surface of the scrotum (Direct)."
"Semen samples from all males, regardless of exposure method, exhibited a decrease in the percentage of motile sperm following ultrasound treatment. There was an average reduction in motility of 40% the week following treatment. Similarly, curvilinear velocity and the percentage of sperm with a normally shaped flagellum were also reduced in all males following ultrasound treatment. A significant reduction in the total number of sperm in an ejaculate (total sperm count) was only observed in males that received ultrasound via the cup method. Following treatment via the cup method, males exhibited up to a 91.7% decrease in average total sperm count (n = 2). Sperm count did not approach pre-treatment levels until 8 weeks following ultrasound exposure."
In this next study they used an astonishing 25W/cm² yet only for 30 seconds. It's still a lot of heat flux on such a small area. Yet it is to be assumed that focussing only on heat damage will lead to the same false and destructive narratives as in the EMF radiation/mobile phone/WiFi business.
Morphological changes to mouse testicular tissue from in vivo ultrasonic irradiation"It appears that spermatocytes are affected earlier than spermatogonia, contrary to the situation following ionizing radiation."
This other one from http://news.bbc.co.uk/2/hi/health/1751177.stm is a specific "fringe" application of tissue cauterization below the skin when combined with topical cooling.
I'll put it here anyway for future reference and the need to better all watch out if you ever encounter US devices with surface contact cooling."The vas deferens are located and a plastic clamp is used to hold them in place in a pinched fold of the skin. Built into the clip is a device that produces five watts of ultrasound. A pulse of ultrasound is fired for between 20 and 50 seconds, heating the vas deferens to over 50C.
This kills cells in the tube wall, which coagulate and obstruct the tube. "I imagine that healing up of muscles by inducing some collagen intrusion will show mostly no disadvantages and that induction of tissue restructuring caters much more for the liver than for fine microstructures as in the brain or the gonads.
Perhaps it can be really beneficial at a very low intensity with pulse formation and field structures and frequencies lent on nature and harmonics etc. I'm confident that even then the benefits will be dose-dependent just as with red light therapy (LLLT low lever laser therapy).
Maybe you find out for us. Just don't overdo it or make your sensitive parts hurt. -
@CrumblingCookie thanks for the studies !
I have only briefly looked over them.But I think they don't use any reasonable intensities . At least I would hope that no one uses 1-25W/cm2 on their balls lol
The contraceptive study used Intensities from 1-2.2W/cm2 .
The testosterone studies I posted use around 20mW, so the difference here is the factor 100.
surely we can't derive many meaningful conclusions from that ,besides: don't overdo it. -
DAY 1:
Received my device today and immediately tried it at the following setting:
5min, at 80mW/cm2 over liver/gallbladder area
Didn't expect to feel anything. But right after it I felt pleasantly relaxed as if I had drank a beer or two.
1 h later I had a bile dump. Success.
Been having stuck bile issues for the last weeks since involuntary mold exposure.So far so good for day 1 !
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@Mauritio excellent! Exactly the lead I was looking for thanks!
