CHT and CHRN: Hyperbaric Medicine Certifications Explained

Last updated: April 2026

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Quick Answer

Hyperbaric Oxygen Therapy (HBO) treats 14 distinct indications recognized by the Undersea & Hyperbaric Medical Society (UHMS) in its 14th Edition. (https://www.uhms.org/images/UHMS-Reference-Material.pdf)
Air or gas embolism, a condition where gas bubbles enter arteries or veins, can occur from ascents as little as one meter. (https://www.uhms.org/resources/featured-resources/hbo-indications.html)
The FDA recommends UHMS-accredited hyperbaric facilities for treating specific illnesses. (https://www.uhms.org/hu/resources/news-announcements/1104-fda-recommends-uhms-accredited-hyperbaric-facilities-for-treatment-of-specific-illnesses.html)
HBO is defined as breathing 100% oxygen at pressures greater than 1 atmosphere absolute. (https://www.uhms.org/images/UHMS-Reference-Material.pdf)

Hyperbaric Oxygen Therapy (HBO) is a specialized medical treatment where patients breathe 100% oxygen in a pressurized chamber. This process helps deliver high levels of oxygen to the body's tissues, which can be crucial for healing and recovery in various conditions. The Undersea & Hyperbaric Medical Society (UHMS) is a key authority in this field, defining HBO and outlining its accepted medical uses. According to the UHMS 14th Edition, there are 14 specific indications for which HBO therapy is recognized as beneficial UHMS 14th Edition HBO Indications. These conditions range from gas embolisms, which can result from an ascent of as little as one meter, to severe infections and non-healing wounds. The UHMS also plays a critical role in promoting safety and quality through its facility accreditation program, which the FDA recommends for treating specific illnesses.

What is Hyperbaric Oxygen Therapy (HBO)?

Hyperbaric Oxygen Therapy (HBO) is a medical treatment that involves a patient breathing 100% oxygen while inside a specially designed chamber where the atmospheric pressure is increased. The Undersea & Hyperbaric Medical Society (UHMS) defines this therapy as the intermittent inhalation of 100% oxygen at a pressure greater than 1 atmosphere absolute (ATA) UHMS 14th Edition HBO Indications. This elevated pressure allows more oxygen to dissolve into the blood plasma, increasing the amount of oxygen delivered to tissues throughout the body, even those with compromised blood flow. This enhanced oxygen delivery can help promote healing, fight infection, and reduce inflammation.

The UHMS stands as a leading organization in hyperbaric medicine, responsible for setting standards and publishing comprehensive guidelines on the appropriate uses of HBO therapy. Their publications, such as the "Hyperbaric Oxygen Therapy Indications" reports, are essential resources for practitioners and patients alike. These reports detail the conditions for which HBO therapy has sufficient evidence to support its use. The UHMS has consistently updated these guidelines over the years, with notable editions including the 13th and 14th editions, which reflect the latest research and clinical consensus in the field.

Defining the Therapeutic Environment

The core principle of HBO therapy relies on Boyle's Law and Henry's Law of gases. Boyle's Law explains how gas volume changes with pressure, while Henry's Law describes how gas dissolves into a liquid. In a hyperbaric chamber, the increased pressure reduces the size of gas bubbles in the body, which is critical for conditions like gas embolism. Concurrently, Henry's Law ensures that more oxygen gas dissolves into the blood plasma. Under normal atmospheric pressure, oxygen is primarily carried by hemoglobin in red blood cells. However, during HBO therapy, the amount of dissolved oxygen in the plasma increases significantly, allowing it to reach areas that might be poorly perfused due to injury or disease.

The Role of the Undersea & Hyperbaric Medical Society

The UHMS is not just a publisher of guidelines; it is a scientific and educational organization dedicated to advancing undersea and hyperbaric medicine. The society's Hyperbaric Oxygen Therapy Committee, comprised of experts in the field, is responsible for reviewing scientific evidence and determining which conditions qualify as accepted indications for HBO therapy. This rigorous process ensures that the recommendations are based on sound medical research. The UHMS also provides background information on HBO, utilization review processes for the therapy, and clear procedures for accepting new indications, as detailed in the preface of their 14th Edition report. This commitment to evidence-based practice is crucial for maintaining the credibility and effectiveness of hyperbaric medicine.

Evolution of HBO Indications

The continuous work of the UHMS is evident in the progression of its "Hyperbaric Oxygen Therapy Indications" reports. The 13th Edition, chaired and edited by Lindell K. Weaver MD, and the more recent 14th Edition, both provide detailed guidance on the specific medical conditions that benefit from HBO therapy. These editions list the same 14 primary indications, reflecting a stable and well-established body of evidence for these treatments. The publications also include important disclaimers, such as the one in the 13th Edition which states: "No responsibility is assumed by the Publisher or Editor for any injury and or damage to persons or property as a matter of product liability, negligence or otherwise, or from any use or operation of any methods, product, instructions, or ideas contained in the material herein. No suggested test or procedure should be carried out unless, in the reader’s judgment, its risk is justified. Because of rapid advances in the medical sciences, we recommend that the independent verification of diagnoses and drug dosages be made." This highlights the importance of professional medical judgment and ongoing verification in a rapidly evolving medical field. The UHMS also ensures transparency by listing the members of the Hyperbaric Oxygen Therapy Committee and providing author biographies in their comprehensive reports.

What Conditions Does Hyperbaric Oxygen Therapy Treat?

Hyperbaric Oxygen Therapy (HBO) treats a specific set of medical conditions recognized by the Undersea & Hyperbaric Medical Society (UHMS). The 14th Edition of the UHMS "Hyperbaric Oxygen Therapy INDICATIONS" report lists 14 distinct accepted indications for this specialized treatment UHMS 14th Edition HBO Indications. These indications represent conditions where extensive research and clinical experience have demonstrated the therapeutic benefits of HBO. The list includes both acute emergencies and chronic conditions that are often difficult to treat with conventional methods alone.

The 14 Recognized Indications

The UHMS's 14th Edition comprehensively outlines the conditions for which HBO therapy is indicated. These include:

Air or Gas Embolism: A condition where gas bubbles block blood vessels.
Arterial Insufficiencies: This category includes two specific sub-indications:
- Central Retinal Artery Occlusion: Blockage of the main artery supplying blood to the retina.
- Hyperbaric Oxygen Therapy for Selected Problem Wounds: Chronic, non-healing wounds, often associated with diabetes or poor circulation.
Carbon Monoxide Poisoning: Treatment for severe carbon monoxide toxicity, often involving neurological symptoms.
Clostridial Myonecrosis (Gas Gangrene): A severe, rapidly progressing bacterial infection that destroys muscle tissue.
Compromised Grafts and Flaps: Used to improve the survival of surgically transplanted tissues that are at risk of failure due to inadequate blood supply.
Acute Traumatic Ischemias: Conditions like crush injuries and compartment syndrome, where blood flow to tissues is severely restricted after trauma.
Decompression Sickness: A diving-related illness caused by rapid ascent, leading to nitrogen bubbles forming in the body.
Delayed Radiation Injuries (Soft Tissue and Bony Necrosis): Damage to tissues and bones that occurs months or years after radiation therapy.
Sudden Sensorineural Hearing Loss: An unexplained, rapid loss of hearing.
Intracranial Abscess: A collection of pus within the brain.
Necrotizing Soft Tissue Infections: Severe, rapidly spreading infections that destroy skin, fat, and muscle.
Refractory Osteomyelitis: A persistent bone infection that does not respond to standard treatments.
Severe Anemia: Used in cases where the body cannot deliver enough oxygen to tissues due to severe blood loss or inability to transfuse.
Adjunctive Hyperbaric Oxygen Therapy in the Treatment of Thermal Burns: Used as an additional therapy for severe burns to promote healing and reduce complications.

It is important to note that the 13th Edition of the UHMS HBO Indications also lists these same 14 indications, demonstrating a consistent and well-established set of accepted uses for the therapy UHMS 13th Edition HBO Indications. This consistency underscores the robust evidence base supporting these applications.

Specific Examples of Treatment

For example, in cases of carbon monoxide poisoning, HBO therapy helps to rapidly remove carbon monoxide from the bloodstream and replace it with oxygen, preventing neurological damage. For problem wounds, such as diabetic foot ulcers, HBO therapy stimulates new blood vessel growth and enhances the body's ability to fight infection, leading to improved healing rates. In severe infections like gas gangrene, the high oxygen levels create an environment that inhibits the growth of anaerobic bacteria, which thrive in low-oxygen conditions. The therapy also enhances the effectiveness of antibiotics.

Importance of Evidence-Based Indications

The UHMS's process for accepting new indications is rigorous, requiring substantial scientific evidence and clinical trials. This ensures that HBO therapy is used responsibly and effectively for conditions where its benefits are clearly demonstrated. The society's commitment to evidence-based medicine protects patients and guides healthcare providers in making informed treatment decisions. Facilities that adhere to these guidelines and achieve UHMS accreditation are recognized for meeting high standards of care, which is a crucial consideration for patients seeking HBO therapy. The comprehensive nature of the UHMS reports means that each indication is thoroughly discussed, often with specific treatment protocols and supporting research.

How Does Hyperbaric Oxygen Therapy Address Air or Gas Embolism?

Hyperbaric Oxygen Therapy (HBO) is a primary treatment for air or gas embolism, a serious condition where gas bubbles enter the bloodstream, potentially blocking arteries or veins. Richard E. Moon, in the "Hyperbaric Oxygen Therapy Indications: Air or Gas Embolism" section of the UHMS report, explains that gas embolism occurs when gas bubbles enter arteries or veins UHMS Air or Gas Embolism Indications. This can lead to severe medical emergencies depending on where the bubbles travel in the body. HBO therapy works by both physically compressing these gas bubbles and by increasing the partial pressure of oxygen in the blood, which helps to dissolve the bubbles and restore normal blood flow.

Understanding Arterial Gas Embolism (AGE)

Arterial gas embolism (AGE) is particularly dangerous because bubbles in the arterial system can travel to vital organs like the brain or heart, causing strokes, heart attacks, or other severe damage. Classically, AGE was described in submarine escape training, where pulmonary barotrauma occurred during a free ascent after breathing compressed gas at depth. Pulmonary barotrauma and gas embolism due to breath holding can occur after an ascent of as little as one meter, highlighting how easily this condition can develop even in seemingly minor pressure changes. This means that divers ascending quickly, even from shallow depths, are at risk.

AGE can also be caused by various medical procedures and injuries. It has been attributed to normal ascent in divers with underlying lung pathology, such as bullous disease or asthma. Beyond diving, pulmonary barotrauma can arise from blast injury (both in and out of water), mechanical ventilation, penetrating chest trauma, chest tube placement, and bronchoscopy. These diverse causes underscore the broad range of scenarios where AGE can be a threat. Small volumes of air injected intra-arterially can cause clinical deficits, making rapid treatment essential.

Understanding Venous Gas Embolism (VGE)

Venous gas embolism (VGE) is more common, especially after compressed gas diving. Normally, the pulmonary capillaries, tiny blood vessels in the lungs, trap these VGE bubbles, preventing them from causing clinical symptoms. However, if the volume of VGE is large, it can overwhelm the pulmonary capillary network, allowing bubbles to pass into the arterial circulation, leading to AGE. Large volumes of VGE can also cause symptoms like cough, dyspnea (shortness of breath), and pulmonary edema (fluid in the lungs). VGE can bypass the lungs and enter the left heart directly through anatomical defects like an atrial septal defect or a patent foramen ovale.

Causes of gas embolism other than diving are numerous and include accidental intravenous air injection, cardiopulmonary bypass accidents, needle biopsy of the lung, hemodialysis, central venous catheter placement or disconnection, gastrointestinal endoscopy, hydrogen peroxide irrigation or ingestion, arthroscopy, cardiopulmonary resuscitation, percutaneous hepatic puncture, blowing air into the vagina during orogenital sex, and sexual intercourse after childbirth. Air embolism can also occur during procedures where the surgical site is under pressure, such as laparoscopy, transurethral surgery, vitrectomy, endoscopic vein harvesting, and hysteroscopy. Massive VGE can result from passive entry of air into surgical wounds elevated above the heart, a situation classically described in sitting craniotomy but also occurring during cesarean section, prostatectomy, spine surgery, hip replacement, liver resection, liver transplantation, and dental implant insertion.

How HBO Therapy Works for Embolism

HBO therapy addresses gas embolism through two primary mechanisms. First, the increased pressure in the hyperbaric chamber physically shrinks the gas bubbles in the blood vessels. According to Boyle's Law, as pressure increases, the volume of a gas decreases. This reduction in bubble size helps to clear obstructions in blood vessels, allowing blood flow to resume. Second, breathing 100% oxygen at high pressure significantly increases the amount of oxygen dissolved in the blood plasma. This elevated oxygen level helps to wash out the inert gas (like nitrogen) from the bubbles and replace it with oxygen, which can be metabolized by the body. This process accelerates the dissolution of the bubbles. While intravenous injection of oxygen at 10 mL/min has been tolerated in humans, an infusion of 20 mL/min caused symptoms, indicating the body's tolerance limits for direct oxygen infusion, which is distinct from the controlled environment of HBO therapy where oxygen is breathed. Compared with constant infusions, injections of air are more likely to cause clinical abnormalities. The rapid recompression and high oxygen delivery provided by HBO therapy are crucial for minimizing tissue damage and improving patient outcomes in cases of gas embolism.

Why Are UHMS-Accredited Facilities Important?

UHMS-accredited facilities are crucial for ensuring the highest standards of safety and quality in hyperbaric oxygen therapy. The Food and Drug Administration (FDA) specifically recommends UHMS-accredited hyperbaric facilities for the treatment of specific illnesses FDA Recommends UHMS Accredited Facilities. This recommendation highlights the importance of choosing a facility that has undergone a rigorous evaluation process by an independent, authoritative body. Accreditation by the Undersea & Hyperbaric Medical Society (UHMS) signifies that a facility meets comprehensive standards for patient care, equipment, and staff expertise, providing peace of mind for both patients and referring physicians.

Ensuring Patient Safety and Quality of Care

Accreditation is not merely a formality; it is a commitment to excellence. UHMS accreditation ensures that a hyperbaric facility adheres to strict guidelines designed to protect patient safety and deliver effective treatment. These guidelines cover a wide range of operational aspects, including the maintenance and safety of hyperbaric chambers, the qualifications and training of medical staff, emergency procedures, and quality assurance protocols. For instance, the types of hyperbaric chambers used, whether monoplace (single patient) or multiplace (multiple patients), must meet specific safety standards and be regularly inspected. Multiplace chambers, for example, allow medical staff to be inside the chamber with patients during treatment, which can be critical for monitoring and intervention. The UHMS provides resources like an introductory 40-hour training course, demonstrating their commitment to educating hyperbaric professionals.

A facility that has achieved UHMS accreditation has demonstrated its capability to provide hyperbaric oxygen therapy in a manner consistent with the best practices in the field. This includes having proper medical oversight by physicians trained in hyperbaric medicine, certified hyperbaric technologists or nurses, and appropriate emergency equipment and procedures in place. The FDA's recommendation underscores that choosing an accredited facility is a key step in ensuring that patients receive care that is both safe and aligned with recognized medical standards for conditions like diabetic foot ulcers or sudden hearing loss.

The UHMS Hyperbaric Facility Accreditation Program

The UHMS offers a dedicated Hyperbaric Facility Accreditation Program, which is a voluntary process that facilities undertake to demonstrate their commitment to quality. This program involves a comprehensive review of the facility's operations, including on-site inspections, documentation review, and interviews with staff. Facilities can also access resources like a "How to Prepare for Accreditation Workshop" to guide them through the process. The accreditation process is designed to be thorough, covering everything from the calibration of equipment to the ongoing education of personnel.

For patients, selecting a UHMS-accredited facility means they are likely to receive care from a team that is well-trained, experienced, and dedicated to following established protocols. It also means the equipment used is maintained to high safety standards. This is especially important for a therapy that involves specialized equipment and potentially complex medical conditions. The UHMS's role extends beyond just accreditation; they also offer continuing education through their online portal and host an Annual Scientific Meeting, fostering ongoing learning and advancement in the field of undersea and hyperbaric medicine.

Trust and Reliability in Hyperbaric Medicine

In a specialized field like hyperbaric oxygen therapy, where treatments can be complex and conditions severe, trust and reliability are paramount. UHMS accreditation serves as a benchmark for quality, giving patients and their families confidence in the care they receive. When a facility is accredited, it signals that it has been vetted by leading experts in hyperbaric medicine and meets a high bar for patient safety and clinical effectiveness. This helps to differentiate reputable providers from those who may not adhere to the same rigorous standards. The FDA's explicit recommendation for UHMS-accredited facilities further solidifies this trust, aligning regulatory guidance with expert medical consensus. The UHMS, located at 631 US Highway 1, Suite 307 North Palm Beach, FL 33408 USA, continues to be a central authority in defining and promoting safe and effective hyperbaric practices.

What Other Conditions Benefit from HBO Therapy?

Beyond air or gas embolism, Hyperbaric Oxygen Therapy (HBO) is a recognized treatment for a diverse range of other serious medical conditions, as outlined by the Undersea & Hyperbaric Medical Society (UHMS). The 14th Edition of the UHMS "Hyperbaric Oxygen Therapy INDICATIONS" lists 14 conditions in total, covering infections, traumatic injuries, and chronic issues UHMS 14th Edition HBO Indications. These conditions benefit from the increased oxygen delivery and pressure effects that HBO therapy provides, often when conventional treatments alone are insufficient.

Addressing Severe Infections

HBO therapy plays a critical adjunctive role in treating several severe infections. One such condition is Clostridial Myonecrosis (Gas Gangrene). This is a rapidly progressive and life-threatening bacterial infection that destroys muscle tissue. The bacteria responsible, Clostridium perfringens, are anaerobic, meaning they thrive in low-oxygen environments. HBO therapy creates a high-oxygen environment that directly inhibits the growth of these bacteria and helps to neutralize the toxins they produce. The elevated oxygen levels also enhance the effectiveness of antibiotics and support the body's immune response, making it a powerful tool in combating this aggressive infection.

Another severe infection on the UHMS list is Necrotizing Soft Tissue Infections. These are aggressive infections that spread quickly, destroying skin, fat, and muscle. Like gas gangrene, these infections often involve anaerobic bacteria or a mix of bacterial types that thrive in compromised, low-oxygen tissues. HBO therapy helps to halt the spread of the infection, reduce tissue damage, and prepare the affected area for surgical debridement and reconstructive procedures.

Finally, Intracranial Abscess, a collection of pus within the brain, also benefits from HBO. These abscesses can be difficult to treat due to the brain's delicate nature and the blood-brain barrier. HBO therapy enhances the delivery of oxygen and antibiotics to the infected area, promoting healing and reducing inflammation, which is crucial for preventing neurological damage. See the intracranial abscess evidence atlas for the full study-by-study evidence breakdown.

Healing and Recovery from Injury and Radiation

HBO therapy is also vital for various traumatic injuries and conditions related to radiation. Acute Traumatic Ischemias, such as crush injuries and compartment syndrome, involve severe restriction of blood flow to tissues following trauma. The high-pressure oxygen helps to reduce swelling, improve oxygenation to injured tissues, and preserve viable cells that might otherwise die due to lack of oxygen. This can significantly improve outcomes and reduce the need for amputation.

For patients who have undergone radiation therapy, Delayed Radiation Injuries (Soft Tissue and Bony Necrosis) can emerge months or even years later. Radiation can damage blood vessels, leading to poor blood supply and tissue death in the affected areas. HBO therapy stimulates the growth of new blood vessels (angiogenesis) and promotes the healing of damaged tissues, including bone (osteoradionecrosis) and soft tissues. This can alleviate pain, improve function, and prevent further tissue breakdown.

Furthermore, HBO therapy is recognized for improving the survival of Compromised Grafts and Flaps. When surgeons transplant skin, muscle, or other tissues (grafts and flaps) to cover wounds, their survival depends on establishing a new blood supply. If this blood supply is inadequate, the graft or flap can fail. HBO therapy enhances oxygen delivery to these vulnerable tissues, promoting circulation and increasing the chances of successful integration. Similarly, as an Adjunctive Hyperbaric Oxygen Therapy in the Treatment of Thermal Burns, HBO helps to reduce inflammation, promote healing, and minimize scarring in severe burn cases.

Addressing Vascular and Other Conditions

HBO therapy extends its benefits to several conditions involving vascular compromise or other systemic issues. Central Retinal Artery Occlusion is an emergency where the main artery supplying blood to the retina becomes blocked, often leading to sudden, profound vision loss. HBO therapy can help by increasing oxygen delivery to the ischemic retina, potentially preserving vision if initiated quickly.

Refractory Osteomyelitis refers to a persistent bone infection that has not responded to standard treatments, including antibiotics and surgery. The dense structure of bone and poor blood supply can make these infections very difficult to eradicate. HBO therapy enhances oxygen penetration into the bone, creating an environment hostile to bacteria, improving the delivery of antibiotics, and stimulating bone healing.

Finally, Severe Anemia is an indication for HBO therapy when conventional blood transfusions are not possible or are contraindicated. In such critical situations, HBO therapy significantly increases the amount of dissolved oxygen in the blood plasma, allowing enough oxygen to reach tissues even with a severely reduced red blood cell count. This can be a life-saving measure to prevent organ damage. The UHMS maintains a list of these indications, providing detailed guidance in its publications to ensure responsible and effective use of HBO therapy. See the severe anemia evidence atlas for the full study-by-study evidence breakdown.

Does the UHMS Provide Training and Education?

Yes, the Undersea & Hyperbaric Medical Society (UHMS) is deeply committed to providing extensive training and education for healthcare professionals in the field of hyperbaric medicine. Their educational offerings are designed to ensure that practitioners are well-versed in the latest advancements, best practices, and safety protocols associated with hyperbaric oxygen therapy. This commitment to education supports the overall quality and safety of hyperbaric medicine globally.

Comprehensive Educational Resources

The UHMS offers several avenues for professional development and continuing education. One significant resource is their Online Continuing Education Portal (http://www.courses-uhms.org/). This portal provides a flexible and accessible way for healthcare providers to engage in ongoing learning, earn continuing education credits, and stay current with the evolving landscape of hyperbaric and undersea medicine. The online format allows professionals from various locations to access high-quality educational content at their own pace.

For those new to the field or seeking foundational knowledge, the UHMS provides Introductory 40-Hour Training Courses (https://www.uhms.org/hu/education/featured-education/introductory-courses.html). These courses are crucial for individuals, such as physicians, nurses, and technicians, who are entering hyperbaric medicine. A 40-hour course typically covers the fundamental principles of hyperbaric physiology, the indications and contraindications for HBO therapy, chamber operations, patient safety, and emergency procedures. Such comprehensive initial training is essential for ensuring that all personnel working in hyperbaric facilities possess the necessary knowledge and skills to provide safe and effective care.

Fostering Professional Development and Collaboration

In addition to structured courses, the UHMS also hosts an Annual Scientific Meeting. This meeting serves as a premier forum for researchers, clinicians, and other professionals in undersea and hyperbaric medicine to present new research, discuss clinical challenges, and network with peers. The Annual Scientific Meeting is a vital platform for disseminating cutting-edge information, fostering collaboration, and advancing the scientific understanding of hyperbaric oxygen therapy and related fields. Attendees can learn about new treatment protocols, emerging indications, and technological advancements in hyperbaric chambers and associated equipment.

The UHMS also supports professional recognition through programs like the Fellow of Undersea & Hyperbaric Medicine designation. This fellowship recognizes individuals who have made significant contributions to the field and demonstrated exceptional expertise. Such programs encourage ongoing excellence and leadership within the hyperbaric community.

The society's educational efforts are directly linked to its mission of promoting patient safety and quality of care. By providing robust training and continuing education, the UHMS helps ensure that hyperbaric facilities, especially those seeking or maintaining UHMS accreditation, have a highly competent and knowledgeable workforce. This educational infrastructure is fundamental to maintaining the high standards that the FDA recognizes and recommends for facilities treating specific illnesses. The UHMS's commitment to education strengthens the credibility and effectiveness of hyperbaric medicine as a specialized medical discipline.

Frequently Asked Questions

What is the role of the Undersea & Hyperbaric Medical Society (UHMS)?

The UHMS is a leading scientific and educational organization dedicated to hyperbaric and undersea medicine. Its primary roles include defining Hyperbaric Oxygen Therapy (HBO), establishing and updating the list of accepted medical indications for HBO, and promoting safety and quality through its Hyperbaric Facility Accreditation Program. The UHMS publishes comprehensive reports, such as the 14th Edition of "Hyperbaric Oxygen Therapy INDICATIONS," which lists 14 specific conditions that benefit from HBO therapy.

How many indications for hyperbaric oxygen therapy are officially recognized by the UHMS?

The Undersea & Hyperbaric Medical Society (UHMS) officially recognizes 14 distinct indications for hyperbaric oxygen therapy. These indications are consistently listed in their authoritative publications, including both the 13th and 14th Editions of the "Hyperbaric Oxygen Therapy INDICATIONS" report. This consistent number reflects a well-established body of evidence supporting the use of HBO for these specific medical conditions.

What is the difference between arterial gas embolism (AGE) and venous gas embolism (VGE)?

Arterial gas embolism (AGE) occurs when gas bubbles enter the arterial system, which carries oxygenated blood away from the heart to the body, posing a high risk to vital organs like the brain. Venous gas embolism (VGE) occurs when gas bubbles enter the venous system, which carries deoxygenated blood back to the heart. VGE bubbles are typically trapped by the lungs, but large volumes or cardiac defects can allow them to pass into the arterial circulation, leading to AGE. Pulmonary barotrauma and gas embolism due to breath holding can occur after an ascent of as little as one meter, demonstrating the potential for AGE even from minor incidents.

Why does the FDA recommend UHMS-accredited hyperbaric facilities?

The FDA recommends UHMS-accredited hyperbaric facilities because accreditation ensures that these facilities meet stringent standards for patient safety, quality of care, and operational integrity. The UHMS Hyperbaric Facility Accreditation Program involves a thorough review of equipment, staff qualifications, and treatment protocols, ensuring that facilities adhere to best practices in the field. This recommendation helps patients identify reputable providers who deliver safe and effective hyperbaric oxygen therapy for specific illnesses.

Can hyperbaric oxygen therapy be used for conditions like sudden hearing loss or severe anemia?

Yes, hyperbaric oxygen therapy is an officially recognized indication for both sudden sensorineural hearing loss and severe anemia by the Undersea & Hyperbaric Medical Society (UHMS). For sudden hearing loss, HBO therapy helps improve oxygen delivery to the inner ear, potentially preserving hearing. In cases of severe anemia, when blood transfusions are not possible, HBO therapy significantly increases the amount of dissolved oxygen in the blood plasma, ensuring tissues receive adequate oxygenation despite a low red blood cell count, as outlined in the UHMS 14th Edition.