Remember, fetuses aren’t really composed of cells, fatty or otherwise. Nor are brains largely composed of fat. And inducing mechanical disruptions or (in the worst case) catastrophic vacuum implosions in growing fetal cells which develop and differentiate based on epigenetic cues from their cellular microenvironment is, well, just what the doctor ordered!
So what is the mechanism of cellular disruption in cavitation and how does it differ from ionizing EM radiation? Aside from acoustic vs electromagnetic mechanisms of energy transfer, there isn’t a whole lot of difference. A tiny region of tissue experiences a very concentrated energy field resulting in random and permanent structural changes (i.e. disintegration). The only question is the energy density of imploding microbubbles vs the energy density of uv, xray or gamma ray photons and the spectrum of such energies emitted by the machine and absorbed by a given region of tissue. At the lower end of the scale, the difference between implosion and disruption is only one of degree, analogous to the difference between xrays and microwaves in their impact on living tissue.
Clearly, we’re dealing with a probabilistic question whose parameters are largely defined by uncontrollable variables such as (in the case of ultrasound) lensing and reflection effects caused by variations in tissue density (such as concave pelvic bones), and variations in the types of machines and duration of exposures in the hands of doctors who are well trained to be ignorant of such issues, in contrast to their chinese counterparts (see below).
In an ultrasonic cleaner, the object to be cleaned is placed in a chamber containing a suitable solution (in an aqueous or organic solvent, depending on the application). In aqueous cleaners, surfactants (e.g., laundry detergent) are often added to permit dissolution of nonpolar compounds such as oils and greases. An ultrasound generating transducer built into the chamber, or lowered into the fluid, produces ultrasonic waves in the fluid by changing size in concert with an electrical signal oscillating at ultrasonic frequency. This creates compression waves in the liquid of the tank which ‘tear’ the liquid apart, leaving behind many millions of microscopic ‘voids’ or ‘partial vacuum bubbles’ (cavitation). These bubbles collapse with enormous energy; temperatures and pressures on the order of 5,000 K and 135 MPa are achieved; however, they are so small that they do no more than clean and remove surface dirt and contaminants. The higher the frequency, the smaller the nodes between the cavitation points, which allows for cleaning of more intricate detail….
135 MPa is around 20,000 pounds per square inch! 5,000K is around 3 times the melting point of iron. Amazing but true. F=MA with A getting very very large, which is why you can easily hammer a nail that you couldn’t possibly push into a block of wood.
So the question is what is the rate and density and duration of the random concentrations of energy possible with a typical fetal ultrasound and what is the probability distribution for biological disruption and/or cavitation? Even for a well-controlled exposure, we’re talking about a poisson distribution https://en.wikipedia.org/wiki/Poisson_distribution , which has the property that the “tail” never goes to zero. This is in keeping with the corresponding distribution for ionizing EM radiation https://ratical.org/radiation/CNR/NoSafeThresh.html which is probably why “routine” xrays of pregnant women were tied to childhood cancers back in the bad old days of medical quackery which are thankfully behind us.
Rather than try to calculate all the frequencies, energy densities and cross sections, not to mention the varieties of fetal ultrasound machines and techniques in use, an epidemiological approach is probably best, especially given that we don’t really know a whole hell of a lot about the microbiology of developing fetuses or the actual usage of entertainment “gee-wiz” ultrasound out in the real world. Any volunteers?
It turns out that china has been doing actual research into this issue for some time, as opposed to the blanket of censorship and lack of funding which has descended on american medical ultrasound research.
Sometimes fetal ultrasound is needed, but its risks are vastly understated in american medical education. Subjecting children to a needless risk of life-long injury is never “routine” for the victims.
How much of the ongoing decline in western IQ is attributable to needless fetal ultrasound? http://thoughtcrimeradio.net/2018/10/success-iq-now-dropping-by-7-points-with-each-new-generation/ In the USA it’s an especially complex question given that it’s just one more factor in a constellation of routine assaults american babies are subjected to. Chemically induced miscarriage, back-birthing, immediate cord clamping http://thoughtcrimeradio.net/2019/02/medical-research-rediscovers-harm-of-immediate-cord-clamping/ http://thoughtcrimeradio.net/2014/12/the-umbilical-cord-and-premature-deliveries/ , toxic stress caused by needless birth trauma http://thoughtcrimeradio.net/2018/08/wtf-theyre-teaching-about-birth-in-medical-school/ and mother-baby isolation http://thoughtcrimeradio.net/2015/02/effects-of-early-mother-infant-separation-one-year-later/ and circumcision http://members.tranquility.net/~rwinkel/MGM/primer.html , with resultant disruption of breast feeding leading to aluminum-contaminated baby formula http://thoughtcrimeradio.net/2012/10/omg-aluminum-contamination-in-baby-formula/ http://thoughtcrimeradio.net/2014/06/lack-of-breast-feeding-linked-to-autism/ http://members.tranquility.net/~rwinkel/MGM/birthUSA3.html, followed by hyper-vaccination with contaminated vaccines http://thoughtcrimeradio.net/2017/03/the-vaccine-discovery-that-destroyed-judy-mikovitzs-career/ http://thoughtcrimeradio.net/2018/01/multiple-vaccines-at-once-risk-genetic-recombination-and-new-pandemics/ , water fluoridation http://thoughtcrimeradio.net/?s=fluoridation+iq and later on, fluoridated toothpaste. Not to mention psych drugs (now routinely given to medically traumatized toddlers http://members.tranquility.net/~rwinkel/MGM/oldrefs/www.drkoop.com/newsdetail/93/512690.html http://thoughtcrimeradio.net/2018/02/over-a-million-children-under-the-age-of-six-are-currently-on-psychiatric-drugs-in-america/ ) and oppressively sensory-deprived and emotionally barren “meducational” indoctrination http://thoughtcrimeradio.net/2017/12/american-schools-discover-recess/ . And that was before common core. http://thoughtcrimeradio.net/2015/03/common-cores-recipe-for-imposed-ignorance/ . WTF is going on here?
Doctors are supposed to be for dealing with medical emergencies, not creating them. Gloria Lemay ( http://www.glorialemay.com/ ) says that upwards of 95% of healthy women can birth naturally at home. Virtually 100% of healthy women who choose a standard obstetrical approach to birth subject their babies to needless physical and psychological risks, including antibiotic-resistant hospital infections, premature cord clamping and imprinted trauma which can result in life long chronic stress.