THE EFFECTS OF DIATHERMY ON TISSUES CONTIGUOUS TO IMPLANTED SURGICAL METALS
H. S. ETTER, R. H. PUDENZ, I. GERSH · 1947
1947 research showed RF medical treatments can affect tissues around metal implants, foreshadowing today's EMF-metal interaction concerns.
Plain English Summary
This 1947 study examined how diathermy (medical heating using radio frequency radiation) affects tissues surrounding surgically implanted metals in animals. The research investigated whether RF radiation used in medical treatments could cause dangerous heating or tissue damage around metal implants. This early work established important safety considerations for medical RF procedures that remain relevant today.
Why This Matters
This pioneering 1947 research tackled a critical safety question that medical professionals still grapple with today: what happens when electromagnetic fields interact with metal objects inside the human body? The study's focus on diathermy - a medical treatment using RF radiation to heat tissues - represents one of the earliest systematic investigations into how EMF exposure can create unintended biological effects through metal interactions.
What makes this research particularly relevant to today's EMF concerns is the mechanism it explored. Just as this study examined how RF fields can concentrate energy around surgical metals, we now face similar questions about everyday metal objects - dental fillings, jewelry, medical devices - and their interaction with cell phone radiation, WiFi signals, and other modern EMF sources. The physics hasn't changed, but our exposure has multiplied exponentially since 1947.
Finding
When the tantalum was implanted in muscle, the smallest dose of diathermy used with machine C resulted in slight incremental damage of questionable significance in all animals. In 1 animal, the same dose of diathermy resulted in evidence of superficial burns. Larger or repeated doses also caused severe burns.
In their words
“When the tantalum was implanted in muscle, the smallest dose of diathermy used with machine C resulted in slight incremental damage of questionable significance in all animals. In 1 animal, the same dose of diathermy resulted in evidence of superficial burns. Larger or repeated doses also caused severe burns.”
Exposure Information
Specific exposure levels were not quantified in this study. Duration: Twenty to forty minutes for each application, with some animals receiving multiple applications
Study Details
To determine experimentally whether or not heating of tissues contiguous to implanted metals takes place with short wave diathermy.
Experimental animals (dogs, rabbits, cats) were used with various types of surgical metals implanted...
Tissue temperature measurements showed a general tendency for the metal side to become warmer, but n...
Short wave diathermy does not appear to cause significant heating of implanted surgical metals that would result in tissue damage. The observed temperature differences were not significant enough to cause injury. Tissue damage occurred only when diathermy exceeded therapeutic dosage levels, causing burns. The major blood supply was anatomically intact in all animals, suggesting that impaired circulation might be a factor in potential tissue damage.
Show BibTeX
@article{the_effects_of_diathermy_on_tissues_contiguous_to_implanted_surgical_metals_g3875,
author = {H. S. ETTER and R. H. PUDENZ and I. GERSH},
title = {THE EFFECTS OF DIATHERMY ON TISSUES CONTIGUOUS TO IMPLANTED SURGICAL METALS},
year = {1947},
}