HBOT Conversations:
Tom Fox (Part 1)
Tom is the Research Physiologist for the Hyperbaric Institute for Research and Training, a division of Island Hyperbaric Centre in Pincourt QC. He has worked in the field of Clinical Hyperbaric Oxygen for the last 30 years, and has been intimately involved with the implementation and the development of the US Army’s Clinical Hyperbaric Service at Dwight David Eisenhower Army Medical Center. Tom is a senior army aviator and flew twelve years as a Medical Evacuation Pilot for the US Army.
Tom joined the Extivita-RTP team in 2022 as the Safety Director, and is joining us in a 2-part series to discuss the history of Hyperbaric Oxygen Therapy and dive into his personal experience healing patients with HBOT.
Watch the Podcast
We appreciate HBOT historian, Tom Fox, returning to HBOT News to dive in deeper to the history of Hyperbarics, which we can date back to the 1660s!
Tom explains that in the 1830s, the first clinical use of hyperbarics was used and introduced, this revived Nathaniel Henshaw’s concept of Hyperbaric treatments. Nathaniel Henshaw, a clergyman, built a sealed chamber in 1662. Henshaw believed that the application of higher pressure (hyperbaria) was good to treat acute conditions, and that lower pressure (hypobaria) would be better to treat chronic diseases.

1662, Henshaw’s “Domicilium” hyperbaric chamber
This is an interesting fact, because now we’re learning that the cyclic use of hyperbaria (or relative hyperbaria) and hypobaria is very intriguing in what it’s doing from the standpoint of physiology. Tom mentions Dr. Efrati and his group of researchers have been at the forefront of looking at this, and are doing a phenominal job of conducting the hyperbaric studies and getting the hyperbaric education out there. There’s been very limited commitment to do this, he commends Dr. Efrati and his group at Tel Aviv for all they do for the HBOT industry. What you will witness throughout the history of hyperbarics is that they’ve used slightly pressurized room air, and that’s important to know because the slightly pressurized room air has consistently been assumed not to have any effect. It’s even offered up as a control in many of the studies, like the placebo. But the problem is when the placebo helps and the treatment helps, it’s easy to say that the reason both groups are getting better is because of the “participation effect”, or it being “in their heads”. And Dr. Efrati is bringing all this to light. This information is also changing the way the HBOT industry looks at the application of air breaks within the protocols. The use of air breaks was thought to fight oxygen toxicity, but now it’s used to establish a relative hypoxia without going into hypoxic conditions. Host di Girolamo then breaks all of that information down for the viewer to better understand…
So to paraphrase that, you’re breathing pure oxygen and also now you’re breathing air, your body says, ‘oh, oxygen’s depleting, you’re suffocating.’ All these mechanisms occur in your physiology, and then the body’s like, ‘Oh, no, everything’s okay. We have plenty of oxygen.’ So that five minute air break triggers that, and then he’s doing it, I think, three or four times in a 90 minute treatment and it ends up being therapeutic.
Continuing down the timeline of HBOT and fascinating discoveries in the 1800s, Tom Fox brings up a series of articles, Lectures on The Compressed Air Bath and its uses in the treatment of disease, that appeared in the British Medical Journal, dated April 18th, 1885 by a doctor, Theodore Williams. Tom reads the first paragraph from the first article:
“The use of atmospheric air under different degrees of barometric pressure in the treatment of disease is one of the most important advances in modern medicine. When we consider the simplicity of the agent, the exact method by which it is applied, and the precision with which it can be regulated to the requirements of each individual, we are astonished that in England, this method of treatment has been so little used.” – Theodore Williams
That was almost 150 years ago. Back then they were just taking air and putting you under pressure. Now it’s a breakthrough medical treatment, and it’s still not being used in the manner that it could/should be. Almost 200 years ago we were on the cutting edge of medicine! And today we still have to fight to explain that even slightly pressurized room air has a therapeutic benefit — using pressure for healing purposes has literally been happening since the 1600s.

Apparently, Cunningham had some difficulty justifying it all by scientific standards, and this was a very new concept in US medicine. The world had never seen anything like it! Unfortunately, Cunningham fell victim toa unusual amount of scrutiny, and was eventually shut down with the chamber being sold for scrap metal during World War II.
So many people now see the value in Cunningham’s efforts and what he contributed to the HBOT industry. Finally, his work can be interpreted as vindication of the God-given miracle of oxygen and pressure to heal our bodies and minds.
Guests

Thomas M. Fox, MAS,MS, CHT - Safety Director at Extivita RTP & Research Physiologist for the Hyperbaric Institute for Research and Training
Tom is the Research Physiologist for the Hyperbaric Institute for Research and Training, a division of Island Hyperbaric Centre in Pincourt QC. He has worked in the field of Clinical Hyperbaric Oxygen for the last 30 years. During this time, he has been intimately involved with the implementation and the development of the US Army’s Clinical Hyperbaric Service at Dwight David Eisenhower Army Medical Center. He has provided contract hyperbaric services since 1997. Prior to accepting his current position in Quebec, Canada, Mr. Fox served as the Chief of the Atmospherics Branch of the U.S. Army School of Aviation Medicine, Fort Rucker Alabama. In this capacity, he was responsible for hyperbaric/ hypobaric operations and training of US and NATO aviators, flight surgeons and flight medics. Mr. Fox is a senior army aviator and flew twelve years as a Medical Evacuation Pilot for the US Army.
Tom joined the Extivita team in 2022 as the Safety Director, helping Extivita to maintain a healthy and safe environment for exceptional patient care.
Subscribe Now, It’s Free!
Recent HBOT News
HBO: a possible supplementary therapy for oral potentially malignant disorders.
Abstract: Oral potentially malignant disorders (OPMDs) are chronic inflammatory diseases in which cells suffer hypoxia referring to deprivation of adequate oxygen supply. Hyperbaric oxygen treatment (HBO), which can increase oxygen tension and delivery to...
Clinical Trial – Efficacy Study of Riociguat and Its Effects on Exercise Performance and Pulmonary Artery Pressure at High Altitude
During ascent to high altitude there is a physiologic response to hypoxia that results in an
elevated pulmonary arterial pressure associated with decreased exercise performance,
altitude-induced pulmonary hypertension, and high altitude pulmonary edema (HAPE). Riociguat
is a novel agent from Bayer Pharmaceuticals that has already demonstrated effectiveness in
the treatment of pulmonary hypertension, and it may prove to be beneficial in cases of
altitude-induced pulmonary hypertension or HAPE. This research study, composed of 20 healthy
volunteers ages 18-40 years, will attempt to mimic the decreased oxygen supply and elevated
pulmonary artery pressures found in conditions of high altitude, allowing observation of the
effects of riociguat and exercise on pulmonary arterial pressure, arterial oxygenation, and
exercise performance. Prior to entering the hypobaric chamber, subjects will have radial
arterial lines and pulmonary artery catheters placed to obtain arterial and pulmonary artery
pressure measurements. Subjects will then enter the hypobaric chamber and perform exercise
tolerance tests at a simulated altitude of 15,000 feet on an electrically braked ergometer
(exercise bike) before and after administration of riociguat. If, after administration of
riociguat and exposure to a simulated altitude of 15,000 feet, the exercise performance is
improved and observed pulmonary artery pressures are lower than those measurements seen prior
to administration of riociguat, this could lead to development of a prophylactic and/or
treatment strategy for HAPE and high-altitude pulmonary hypertension. Statistical analysis
will compare the variables of pulmonary artery pressure, radial arterial pressure,
ventilation rate, cardiac output, PaO2, and work rate at exhaustion before and after
administration of the drug riociguat. The investigator’s hypothesis is that riociguat will
decrease pulmonary artery pressure and improve gas exchange and exercise performance at
altitude.
Cervical spine osteomyelitis and epidural abscess after chemoradiotherapy for hypopharyngeal carcinoma: a case report.
Abstract: Osteomyelitis of mandible as a delayed adverse event following radiation therapy has been widely reported; however, osteomyelitis of the cervical spine has rarely been reported. In this study, we reported our experience with a case of cervical spine...
