HBOT Conversations:
Dr. Peter Canaday (Part 1)
Dr. Peter Canaday has published work in Applied Physiology, Respiratory Medicine, and Diagnostic Radiology. He has presented at National (USA) and International meetings, and his research supported the eventual FDA approval of a new medical imaging device incorporating digital X-ray tomosynthesis. He has sat on National, State, and Local advisory committees, and given testimony at the State Legislative level in the USA.
Dr. Canaday’s experience with Hyperbaric Oxygen Therapy dates back to the 1980s when he studied HBOT under Dr. Eric Kindwall, “The Father of Hyperbaric Medicine”. Dr. Canaday also co-founded the Hyperbaric Medicine Department at St. Anthony Hospital in Lakewood, Colorado.
From 2007, Dr. Canaday spent time in community radiology practices before settling in New Zealand in 2013 as a Consultant Radiologist. Since 2016, he was employed at a Midlands region DHB and served as Head of Department before retiring in March 2021.
Watch the Podcast
HBOT News welcomes Dr. Peter Canaday. Dr. Canaday now lives primarily in New Zealand, but his history with medicine and Hyperbaric Oxygen Therapy dates back over 40 years to the United States.
In this HBOT News Network Conversations, Dr. Canaday spends the first several minutes providing listeners with his biography and medical background. He also dives into his experience with Hyperbaric Oxygen Therapy in the 1980s.
The subject of PTSD and recent Hyperbaric research arises, and Dr. Canaday expands on the topic by referencing two research articles from Dr. Paul G. Harch –
Dr. Canaday further explains, “There is a recruitment of the anti-inflammatory enzymes and a suppression of the pro-inflammatory enzymes that can be achieved through even these lower pressure units. And so we’re beginning to see now the potential mechanism for which Hyperbaric Therapy, whether with or without oxygen, may be effective.”
The remainder of this HBOT News Conversation is specific to the topic of COVID-19. di Girolamo starts the conversation discussing the struggles for long-hauler COVID patients and the growing number of vaccine injuries as a result of the COVID-19 vaccine. Dr. Canaday agrees that the scientific inquiry for COVID-19 and the available information for associated vaccines has been widely suppressed. He continues that even the data which represent conclusions from peer-reviewed literature has been simply ignored, or set aside without discussion.
In response, Dr. Canaday provides viewers with direct links on how they can learn more about some of the data and information he’s shared with the public regarding the COVID-19 vaccine roll-outs:
Dr Peter Canaday – Pfizer Vaccine Discussion At The Town Hall
Courageous Convos with Special Guest Peter Canaday
Voices of Freedom on Odysee : search Peter Canaday
Dr. Canaday’s HBOT News Conversations is a two part series. Part 2 will air on Friday, December 16, 2022.
This HBOT News Conversation was filmed on October 4, 2022
Guest

Dr. Peter Canaday
Following completion of medical school at the University of Massachusetts in 1976, Dr. Peter Canaday took up training as an Internal Medicine specialist at the University of Michigan, followed by sub-specialist training in Respiratory and Intensive Care at the University of North Carolina. He began his medical career in a busy trauma hospital in Denver, Colorado in 1981 and practiced for 12 years. During his time there, he managed many of the types of patients now seen with severe COVID-19, co-founded a sleep disorders laboratory and a hyperbaric medicine department. As well, he participated in a dozen committee assignments, and rose to Chairman of the Department of Internal Medicine. In 1993, Dr Canaday changed career and completed training as a Radiologist at the University of Wisconsin in 1997. During an 8-year period at Creighton University Medical School in Nebraska, he became tenured as an Assistant Professor of Radiology, and head of the section of Pulmonary Radiology. He also served on or chaired over a dozen hospital and medical school committees and was appointed Clinical Coordinator for the Radiology Department during his time there. Dr Canaday has also published work in applied physiology, respiratory medicine, and diagnostic radiology, has presented at national (USA) and international meetings, and his research supported the eventual FDA approval of a new medical imaging device incorporating digital X-ray tomosynthesis. He has sat on national, state, and local level advisory committees and given testimony at the state legislative level in the USA. From 2007, Dr Canaday spent time in community radiology practices before settling in New Zealand in 2013 as a Consultant Radiologist. Since 2016, he was employed at the Taranaki District Health Board and served as Head of Department before retiring in March 2021.
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Recent HBOT News
Cerebral hypoperfusion in autism spectrum disorder
Cerebral hypoperfusion, or insufficient blood flow in the brain, occurs in many areas of the brain in patients diagnosed with autism spectrum disorder (ASD). Hypoperfusion was demonstrated in the brains of individuals with ASD when compared to normal healthy control brains either using positron emission tomography (PET) or single‑photon emission computed tomography (SPECT). The affected areas include, but are not limited to the: prefrontal, frontal, temporal, occipital, and parietal cortices; thalami; basal ganglia; cingulate cortex; caudate nucleus; the limbic system including the hippocampal area; putamen; substantia nigra; cerebellum; and associative cortices. Moreover, correlations between symptom scores and hypoperfusion in the brains of individuals diagnosed with an ASD were found indicating that the greater the autism symptom pathology, the more significant the cerebral hypoperfusion or vascular pathology in the brain. Evidence suggests that brain inflammation and vascular inflammation may explain a part of the hypoperfusion. There is also evidence of a lack of normal compensatory increase in blood flow when the subjects are challenged with a task. Some studies propose treatments that can address the hypoperfusion found among individuals diagnosed with an ASD, bringing symptom relief to some extent. This review will explore the evidence that indicates cerebral hypoperfusion in ASD, as well as the possible etiological aspects, complications, and treatments.
Clinical Trial – Spinal Anesthesia in Caesarean Section
Spinal anesthesia is a safe technique, widely used and tested in the gynecological field, so
as to be considered the first choice technique in cesarean section, which allows to quickly
obtain a valid sensor and motor block. Bupivacaine is one of the most widely used drug for
obtaining spinal anesthesia in pregnant women undergoing caesarean section. Bupivacaine is a
local anesthetic available as a racemic mixture of its two enantiomers, the R (+)-
dextrobupivacaine and the S (-) – levobupivacaine, whose clinical use is widely validated.
Racemic bupivacaine is available as a simple or hyperbaric solution, the latter being the
most commonly used for spinal anesthesia. Levobupivacaine, which is the pure levorotatory
enantiomer of racemic bupivacaine, is a slightly hypobaric solution compared to liquor and
has shown less heart and nerve toxicity, probably due to its ability to bind proteins more
rapidly, and a greater selectivity towards the sensory component compared to Bupivacaine,
presents action and effects better predictable. Its baricity would also offer the advantage
of providing a less sensitive block to the position.
Hypotension is one of the most common complications of spinal anesthesia and is particularly
relevant in caesarean section because, in addition to the adverse effects on the parturient,
it can have repercussions on the fetus through a reduction of placental perfusion.
Some studies have showed a similar incidence of hypotension in patients treated with
bupivacaine compared to those treated with levobupivacaine, while others assert an
equivalence between the two drugs. In most studies, however, a significantly lower incidence
of hypotension and a greater hemodynamic stability were reported in pregnant patients
undergoing spinal anesthesia by caesarean section with levobupivacaine.
Being both hyperbaric bupivacaine and levobupivacaine routinely used at the "G. Rodolico"
Universitary Hospital of Catania for the spinal anesthesia of pregnant women undergoing
caesarean section and being their use decided exclusively at discretion of the treating
anesthesiologist, in the light of the discrepant data in the literature about the incidence
of hypotension with the two drugs, the main objective of this observational study is to
evaluate the hemodynamic effects mediated by levobupivacaine on pregnant women subjected to
elective cesarean section and to compare them with those mediated by hyperbaric bupivacaine
in an historical court of pregnant women subjected to caesarean section in the period between
April 2017 and April 2018. The hemodynamic parameters will be monitored in real time with a
non-invasive hemodynamic monitoring system (EV1000® platform + Clearsight® system – Edwards
LifeSciences), routinely used in the "G. Rodolico" Universitary Hospital of Catania, allowing
to obtain greater accuracy and veracity of the results compared to previous studies conducted
on such anesthetics.
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