Last updated: April 2026
Disclaimer: This article is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before starting any treatment.
Affiliate Disclosure: We may earn a commission when you purchase through our links. This does not affect our editorial independence.
Quick Answer
- Hyperbaric oxygen therapy (HBOT) involves breathing 100% oxygen in a pressurized chamber, a treatment defined and approved by the Undersea and Hyperbaric Medical Society (UHMS) for various conditions.
- Pressure is a key factor that makes hyperbaric therapy effective, as increasing pressure drives more oxygen into the bloodstream and tissues.
- The UHMS's 14th Edition of "Hyperbaric Oxygen Therapy Indications" lists 14 primary indications for HBOT, including air or gas embolism and carbon monoxide poisoning.
- Pulmonary barotrauma and gas embolism can happen from breath-holding after an ascent of as little as one meter, highlighting the risks associated with pressure changes.
Hyperbaric oxygen therapy, or HBOT, is a medical treatment where individuals breathe pure oxygen in a pressurized environment. This process significantly increases the amount of oxygen dissolved in the blood plasma, allowing it to reach areas of the body that may be deprived of oxygen. The Undersea and Hyperbaric Medical Society (UHMS) is the leading authority that defines and approves the clinical uses for HBOT. These approved uses, often referred to as "indications," are based on rigorous scientific research and clinical evidence. For instance, the UHMS’s 14th Edition of "Hyperbaric Oxygen Therapy Indications" provides a comprehensive list of conditions that benefit from this specialized treatment. Understanding the role of pressure in HBOT is crucial; as pressure increases inside the chamber, more oxygen is forced into the body's tissues, which is fundamental to its therapeutic effects. This enhanced oxygen delivery is vital for treating conditions like gas embolism, where gas bubbles enter the arteries or veins, a condition that can even occur after an ascent of as little as one meter following compressed gas breathing (1).
What is Hyperbaric Oxygen Therapy (HBOT)?
Hyperbaric oxygen therapy (HBOT) is a medical treatment that involves breathing 100% oxygen inside a special chamber where the atmospheric pressure is raised. This controlled environment allows for a significant increase in the amount of oxygen that can be absorbed by the body. The fundamental principle behind HBOT is that elevating the surrounding pressure causes more oxygen molecules to dissolve directly into the blood plasma, rather than just being carried by red blood cells. This dissolved oxygen can then penetrate deeper into tissues and fluids, including those that might have poor blood flow or are otherwise difficult for oxygen to reach under normal atmospheric conditions.
The Undersea and Hyperbaric Medical Society (UHMS) plays a critical role in defining and regulating hyperbaric oxygen therapy. The UHMS is recognized as the authoritative source for approved indications for HBOT, meaning they determine which medical conditions can legitimately be treated with this therapy based on scientific evidence. Our analysis shows that clinics like UCLA Health base their own HBOT indications directly on these UHMS recommendations, ensuring a standardized and evidence-based approach to treatment. The definition of hyperbaric oxygen itself, as outlined by the UHMS, involves administering 100% oxygen at pressures greater than 1.4 atmospheres absolute (ATA) in a hyperbaric chamber. This elevated pressure is key to driving oxygen into the bloodstream and tissues, making it a powerful tool for healing.
The Role of Oxygen and Pressure
The effectiveness of HBOT hinges on two main factors: the concentration of oxygen and the ambient pressure. Patients breathe pure, or 100%, oxygen, which is a much higher concentration than the approximately 21% oxygen found in normal air. When this high concentration of oxygen is combined with increased atmospheric pressure, a phenomenon known as Henry's Law comes into play. This law states that the amount of gas dissolved in a liquid is proportional to its partial pressure above the liquid. In the context of HBOT, this means that more oxygen is physically pushed into the blood plasma, increasing the oxygen tension throughout the body.
This enhanced oxygen delivery is vital for various physiological processes. It can promote the growth of new blood vessels (angiogenesis), reduce swelling and inflammation, and enhance the body's ability to fight infections. For example, in cases of severe anemia, where the blood's capacity to carry oxygen is compromised, HBOT can temporarily supply enough dissolved oxygen to sustain life until the underlying issue is resolved (13). The pressure also has direct effects on gas bubbles within the body, which is particularly important in conditions like air or gas embolism and decompression sickness. By compressing these bubbles, HBOT reduces their size and helps them dissolve back into the blood, where they can be safely removed. See the severe anemia evidence atlas for the full study-by-study evidence breakdown.
UHMS Standards and Guidelines
The UHMS sets the global standards for hyperbaric oxygen therapy. Their comprehensive guidelines are compiled in publications like the "Hyperbaric Oxygen Therapy Indications," now in its 14th Edition. This document is a critical reference for practitioners, outlining accepted uses, treatment protocols, and safety considerations. The UHMS committee members are experts in hyperbaric medicine, ensuring that the recommendations are current and based on the latest research. This rigorous approach helps to distinguish scientifically supported applications of HBOT from unproven or experimental uses.
The UHMS also provides background information on HBOT, including its definition and utilization review processes. Their commitment to evidence-based medicine means that new indications for HBOT are only accepted after thorough evaluation. This ensures that patients receive treatments that are both effective and safe. The UHMS guidelines are not just theoretical; they inform the practical application of HBOT in clinics worldwide, including the specific "dive profiles" or treatment tables used for different conditions. These tables dictate the precise pressure, oxygen concentration, and duration of therapy required for optimal outcomes. For example, the treatment of air or gas embolism has specific recommendations detailed within the UHMS guidelines (1).
Why Does Pressure Matter in HBOT?
Pressure is a fundamental element that makes hyperbaric oxygen therapy effective. It works hand-in-hand with the increased oxygen concentration to deliver therapeutic benefits. Without the elevated pressure, simply breathing 100% oxygen at normal atmospheric pressure would not achieve the same profound physiological changes. The pressure inside the hyperbaric chamber directly influences how much oxygen is driven into the bloodstream and subsequently into the body's tissues.
As the pressure increases, more oxygen molecules are physically compressed and dissolved into the blood plasma. This phenomenon is critical because it allows oxygen to bypass the normal red blood cell transport system and reach areas that might be difficult for red blood cells to access due to injury, swelling, or poor circulation. The therapeutic effects of HBOT, such as promoting wound healing, reducing inflammation, and fighting certain infections, are largely dependent on this pressure-enhanced oxygen delivery. For someone undergoing hyperbaric therapy, the increased pressure can be noticeable, particularly in the ears, similar to the sensation experienced during an airplane ascent or descent, or when diving underwater. Hyperbaric Chamber Pressures Explained details how pressure affects the feeling inside the chamber.
Deeper Dive into Pressure Mechanics
The concept of "dive profiles" in HBOT refers to the specific pressure settings and durations used for different medical conditions. These profiles are meticulously designed to maximize therapeutic effect while ensuring patient safety. The pressure is typically measured in atmospheres absolute (ATA). For example, a common treatment pressure might be 2.0 ATA or 2.4 ATA, which simulates being 33 feet or 45 feet underwater, respectively. At these pressures, the partial pressure of oxygen in the blood can be many times higher than at sea level.
This elevated partial pressure of oxygen has several direct physiological effects. It can shrink gas bubbles in the body, which is crucial for treating conditions like air or gas embolism and decompression sickness. In these cases, the increased pressure physically compresses the harmful gas bubbles, reducing their size and allowing them to be reabsorbed into the blood and safely exhaled. This process is a primary reason why HBOT is the definitive treatment for such emergencies. Furthermore, the high tissue oxygen levels stimulated by pressure can activate various cellular pathways that promote healing. It can enhance the activity of white blood cells, improving their ability to kill bacteria, and stimulate fibroblasts to produce collagen, which is essential for tissue repair.
Pressure and Oxygen Transport
Under normal conditions, oxygen is primarily transported throughout the body bound to hemoglobin in red blood cells. However, in HBOT, the increased pressure dissolves a significant amount of oxygen directly into the plasma, the liquid component of blood. This dissolved oxygen can then travel independently of red blood cells, reaching areas where blood flow might be compromised due to injury, infection, or chronic disease. This is particularly beneficial in conditions like problem wounds, where poor circulation often limits oxygen delivery to the affected area.
The amount of dissolved oxygen can increase dramatically with pressure. For instance, at 3 ATA (equivalent to 66 feet underwater), the amount of oxygen dissolved in plasma can be enough to sustain life even without red blood cells carrying oxygen, a critical factor in treating severe anemia (13). This mechanism underscores why pressure is not just an adjunct but a central component of HBOT's therapeutic power. The sensation of pressure, particularly in the ears, is a common experience during HBOT sessions. Patients are often taught techniques to equalize the pressure in their ears, similar to what divers do, to ensure comfort and prevent barotrauma. Clinics carefully manage the rate of compression and decompression to minimize these effects and ensure a safe and comfortable experience for all patients.
What are the UHMS Approved Indications for HBOT?
The Undersea and Hyperbaric Medical Society (UHMS) serves as the primary authority for establishing the approved indications for hyperbaric oxygen therapy (HBOT). These indications are a list of specific medical conditions for which HBOT has demonstrated clear therapeutic benefit through scientific research and clinical evidence. The UHMS rigorously reviews and updates this list to ensure that HBOT is used appropriately and effectively. The 14th Edition of the Undersea and Hyperbaric Medical Society's 'Hyperbaric Oxygen Therapy Indications' lists approved uses, providing a comprehensive guide for healthcare providers.
UCLA Health, for example, explicitly states that its indications for hyperbaric oxygen therapy are based on the recommendations defined by the UHMS. This adherence to UHMS guidelines highlights the importance of using HBOT only for conditions where its efficacy is well-established. These approved indications cover a wide range of medical emergencies and chronic conditions, addressing issues from gas bubbles in the bloodstream to non-healing wounds and severe infections. The UHMS's commitment to evidence-based practice ensures that patients receive care that is both safe and clinically effective, avoiding the use of HBOT for unproven applications.
The Comprehensive List of UHMS Indications
The UHMS's 14th Edition of "Hyperbaric Oxygen Therapy Indications" outlines 14 primary conditions for which HBOT is approved. These indications are categorized and detailed within the extensive document, which serves as a critical resource for hyperbaric medicine practitioners. The list includes:
- Air or Gas Embolism: This condition occurs when gas bubbles enter arteries or veins, obstructing blood flow. HBOT is crucial for compressing these bubbles and facilitating their reabsorption.
- Arterial Insufficiencies:
- Central Retinal Artery Occlusion: HBOT can help restore oxygen supply to the retina.
- Selected Problem Wounds: HBOT aids in healing chronic, non-healing wounds by improving oxygen delivery and promoting tissue repair.
- Carbon Monoxide Poisoning: HBOT helps to rapidly remove carbon monoxide from the body and deliver oxygen to deprived tissues.
- Clostridial Myonecrosis (Gas Gangrene): This severe bacterial infection thrives in low-oxygen environments; HBOT helps kill the bacteria and prevent tissue destruction.
- Compromised Grafts and Flaps: HBOT can improve the viability of compromised skin grafts and flaps by enhancing oxygenation and blood flow.
- Acute Traumatic Ischemias: Conditions like crush injuries and compartment syndrome benefit from HBOT by reducing swelling and improving oxygen supply to damaged tissues.
- Decompression Sickness: Common in divers, HBOT is the definitive treatment to resolve nitrogen bubbles in the body.
- Delayed Radiation Injuries (Soft Tissue and Bony Necrosis): HBOT helps repair tissue damaged by radiation therapy, promoting healing and reducing pain.
- Sudden Sensorineural Hearing Loss: In some cases, HBOT can improve outcomes by increasing oxygen delivery to the inner ear.
- Intracranial Abscess: HBOT can enhance the effectiveness of antibiotics and improve oxygen supply to the brain to fight infection.
- Necrotizing Soft Tissue Infections: Similar to gas gangrene, HBOT helps combat severe bacterial infections that destroy flesh.
- Refractory Osteomyelitis: This persistent bone infection can be treated with HBOT to improve antibiotic penetration and stimulate bone healing.
- Severe Anemia: In situations where blood transfusions are not possible or insufficient, HBOT can temporarily provide life-sustaining oxygen.
- Adjunctive Hyperbaric Oxygen Therapy in the Treatment of Thermal Burns: HBOT can aid in healing severe burns, reducing inflammation and promoting tissue repair.
These indications represent the consensus of experts in hyperbaric medicine and are supported by a substantial body of research. The meticulous review process by the UHMS ensures that patients and healthcare providers can trust the recommendations for HBOT use. For instance, the detailed chapter on "Hyperbaric Treatment of Air or Gas Embolism: Current Recommendations" (1) within the UHMS publication highlights the critical role HBOT plays in life-threatening conditions.
The Process of Approval and Clinical Application
The UHMS's process for accepting new indications is stringent. It involves a thorough review of scientific literature, clinical trials, and expert consensus. This ensures that any new approved use is backed by strong evidence of efficacy and safety. Once an indication is approved, it becomes part of the standard of care in hyperbaric medicine.
Clinics and hospitals offering HBOT, like UCLA Health, then integrate these UHMS-approved indications into their treatment protocols. This means that when a patient presents with one of these conditions, HBOT can be considered a viable part of their overall treatment plan, often alongside other therapies such as antibiotics, surgery, or nutritional support. The goal is always to provide comprehensive care that maximizes the patient's chances of recovery. The existence of these defined indications helps both patients and providers understand when HBOT is a medically appropriate and beneficial intervention, promoting responsible and effective use of the therapy. UHMS 14th Edition Indications provides the full scope of these approved uses.
How Does HBOT Treat Air or Gas Embolism?
Air or gas embolism is a critical medical condition that occurs when gas bubbles enter the arteries or veins, potentially blocking blood flow and causing severe damage to organs. Hyperbaric oxygen therapy (HBOT) is considered the definitive treatment for this life-threatening emergency. The mechanism by which HBOT addresses gas embolism is multifaceted, primarily involving the physical compression of gas bubbles and the enhanced delivery of oxygen to oxygen-deprived tissues.
Gas embolism was first described in the context of submarine escape training, where pulmonary barotrauma could occur during a free ascent after breathing compressed gas at depth. "Gas embolism occurs when gas bubbles enter arteries or veins. Arterial gas embolism (AGE) was classically described during submarine escape training, in which pulmonary barotrauma occurred during free ascent after breathing compressed gas at depth," said Richard E. Moon, in his chapter on "Hyperbaric Oxygen Therapy Indications: Air or Gas Embolism." This highlights the historical understanding of how pressure changes can lead to gas embolism. Notably, pulmonary barotrauma and gas embolism can occur from breath-holding after an ascent of as little as one meter (1), demonstrating the sensitivity of the body to even small changes in pressure when compressed gas has been breathed.
Understanding Arterial and Venous Gas Embolism
There are two main types of gas embolism: arterial gas embolism (AGE) and venous gas embolism (VGE). AGE is particularly dangerous because gas bubbles enter the arterial circulation, which directly supplies oxygenated blood to vital organs like the brain and heart. These bubbles can obstruct blood flow, leading to strokes, heart attacks, or other severe neurological deficits. VGE, on the other hand, occurs when gas bubbles enter the venous system. Normally, these bubbles are trapped by the pulmonary capillaries in the lungs and do not cause symptoms. However, if the volume of VGE is large, it can overwhelm the lungs' filtering capacity, leading to symptoms like cough, dyspnea (shortness of breath), and pulmonary edema (12, 13). In some cases, VGE can even cross into the arterial circulation, especially in individuals with an atrial septal defect or a patent foramen ovale (PFO), a small opening between the heart's upper chambers (16-19).
The causes of gas embolism are diverse. While classically associated with diving, especially compressed gas diving where VGE commonly occurs (10, 11), gas embolism can arise from many other medical and non-medical situations. For example, pulmonary barotrauma and gas embolism have been attributed to normal ascent in divers with underlying lung pathology, such as bullous disease and asthma (2, 3). Blast injuries, both in and out of water, can also cause pulmonary barotrauma (4, 5), leading to gas embolism. Mechanical ventilation (6), penetrating chest trauma (7), chest tube placement (8), and bronchoscopy (9) are other medical scenarios that can introduce gas into the circulation.
The Mechanism of HBOT in Gas Embolism Treatment
HBOT treats gas embolism through a combination of physical and physiological effects. The primary physical effect is Boyle's Law, which states that at a constant temperature, the volume of a gas is inversely proportional to the pressure exerted on it. When a patient with gas embolism is placed in a hyperbaric chamber and the pressure is increased, the gas bubbles in their arteries or veins are physically compressed, reducing their size. This reduction in size helps to clear obstructions in blood vessels, allowing blood flow to resume. For example, a bubble that might be blocking a small artery in the brain will shrink under pressure, potentially moving out of the way or becoming small enough to pass through the capillary bed without causing further damage.
Beyond physical compression, HBOT also plays a crucial role in facilitating the reabsorption and elimination of these gas bubbles. By increasing the partial pressure of oxygen in the blood, HBOT creates a steep diffusion gradient. This gradient encourages the nitrogen (or other inert gas) from the bubbles to dissolve back into the blood plasma, where it can be transported to the lungs and exhaled. This process is known as denitrogenation. The high oxygen levels also help to re-oxygenate tissues that have been deprived of oxygen due to the embolism, mitigating ischemic damage. Even small volumes of intra-arterial air injection can cause clinical deficits (66), highlighting the need for rapid intervention. While intravenous injection of oxygen at 10 mL/min has been tolerated, 20 mL/min caused symptoms (67), indicating the delicate balance of gas in the bloodstream. Compared with constant infusions, injections of air are more likely to cause clinical abnormalities (68).
Standard HBOT protocols for gas embolism, such as those outlined by the UHMS, involve specific "dive profiles" that dictate the pressure, duration, and number of treatments. These profiles are designed to optimize bubble compression and gas elimination while providing adequate oxygenation to damaged tissues. The immediate application of HBOT is critical for improving outcomes in patients with gas embolism, underscoring its role as a life-saving intervention. UHMS HBO Indications 2020 provides detailed insights into the management of air or gas embolism.
What are Other Key HBOT Indications?
Beyond treating air or gas embolism, hyperbaric oxygen therapy (HBOT) is a recognized treatment for a variety of other serious medical conditions. The Undersea and Hyperbaric Medical Society (UHMS) has meticulously compiled a list of 14 primary indications for HBOT in its 14th Edition of "Hyperbaric Oxygen Therapy Indications." These conditions range from acute emergencies to chronic issues, all benefiting from the increased oxygen delivery and other physiological effects of hyperbaric treatment.
For instance, HBOT is widely used for conditions like carbon monoxide poisoning and decompression sickness. These are acute emergencies where rapid and efficient oxygen delivery is critical. Carbon monoxide poisoning, a leading cause of accidental poisoning, benefits from HBOT's ability to quickly displace carbon monoxide from hemoglobin and deliver oxygen to vital organs. Decompression sickness, often experienced by divers, is directly addressed by HBOT's capacity to compress nitrogen bubbles in the body and facilitate their safe removal. The therapy also plays a significant role in managing problem wounds and acute traumatic ischemias, where improved oxygenation is essential for tissue repair and survival.
Addressing Diverse Medical Challenges
The versatility of HBOT is evident in the broad spectrum of conditions it treats. For example, it is a crucial adjunctive therapy for various types of infections. Clostridial myonecrosis, commonly known as gas gangrene, is a severe bacterial infection that thrives in low-oxygen environments. HBOT helps to directly kill the anaerobic bacteria responsible for this infection and limits its spread by improving oxygen levels in the affected tissues (4). Similarly, necrotizing soft tissue infections, a group of rapidly progressing bacterial infections that destroy flesh, also benefit from the antimicrobial effects of high-dose oxygen (11). In the case of refractory osteomyelitis, a persistent bone infection that doesn't respond to standard treatments, HBOT can enhance the effectiveness of antibiotics by improving oxygen delivery to the infected bone and stimulating bone regeneration (12).
Another important category of indications relates to tissue damage and healing. Compromised grafts and flaps, often used in reconstructive surgery, can be at risk of failure due to insufficient blood supply. HBOT can significantly improve the viability of these tissues by enhancing oxygenation and promoting angiogenesis, the formation of new blood vessels (5). Acute traumatic ischemias, such as crush injuries and compartment syndrome, involve significant tissue damage and reduced blood flow. HBOT helps to reduce swelling, preserve injured tissue, and improve overall outcomes by saturating the affected areas with oxygen (6).
Long-Term Healing and Radiation Injuries
HBOT is also invaluable in addressing long-term consequences of medical treatments, particularly delayed radiation injuries. Radiation therapy, while effective against cancer, can sometimes cause collateral damage to healthy tissues, leading to conditions like soft tissue and bony necrosis. These injuries can manifest months or even years after radiation exposure. HBOT promotes healing in these damaged tissues by stimulating new blood vessel growth, reducing inflammation, and enhancing the activity of cells involved in tissue repair (8). This makes it a vital tool for improving the quality of life for cancer survivors who experience these debilitating side effects.
Furthermore, HBOT has approved indications for conditions that might seem less directly related to oxygen deprivation but still benefit from its unique physiological effects. These include sudden sensorineural hearing loss (9) and intracranial abscess (10). In sudden sensorineural hearing loss, HBOT is thought to improve outcomes by increasing oxygen delivery to the inner ear, which can be sensitive to oxygen deficits. For intracranial abscesses, HBOT acts as an adjunct to antibiotics and surgery, improving oxygenation in the brain tissue to help fight the infection more effectively. The comprehensive list of these indications underscores the diverse therapeutic applications of HBOT, all supported by the rigorous standards of the UHMS. See the intracranial abscess evidence atlas for the full study-by-study evidence breakdown.
What Causes Gas Embolism Beyond Diving?
While gas embolism is famously associated with diving, particularly with pulmonary barotrauma during submarine escape training or compressed gas diving, it is critical to understand that this dangerous condition can arise from a wide range of non-diving-related causes. These causes often involve medical procedures or accidental events where air or gas is inadvertently introduced into the bloodstream. Recognizing these diverse origins is essential for both prevention and prompt treatment with hyperbaric oxygen therapy (HBOT).
Accidental intravenous air injection is a direct and often preventable cause of gas embolism. This can occur in various clinical settings, from routine medical care to more complex procedures. For instance, gas embolism can result from cardiopulmonary bypass accidents (22), where air bubbles might enter the circulation during heart surgery. Similarly, needle biopsy of the lung (23), hemodialysis (24), and even the placement or disconnection of central venous catheters (25, 26) are documented causes. The introduction of hydrogen peroxide, whether through irrigation (28-30) or ingestion (31-33), can also generate gas within the body, leading to embolism. Even arthroscopy (34, 35) and cardiopulmonary resuscitation (36) have been implicated in some cases.
Medical Procedures and Surgical Risks
Many medical and surgical procedures carry an inherent risk of air or gas embolism, particularly those where the surgical site is under pressure or where veins are exposed above the level of the heart. Procedures involving pressurized surgical fields, such as laparoscopy (42-46), transurethral surgery (47, 48), vitrectomy (49), endoscopic vein harvesting (50), and hysteroscopy (51, 52), can inadvertently introduce gas into the patient's circulation. In laparoscopy, for example, carbon dioxide gas is insufflated into the abdominal cavity to create space for surgical visualization, and if not managed carefully, this gas can enter blood vessels.
Massive venous gas embolism (VGE) can also occur due to the passive entry of air into surgical wounds that are elevated above the level of the heart (53). In such positions, the pressure in adjacent veins can become subatmospheric, essentially creating a vacuum that draws air into the bloodstream. This phenomenon has been classically described in sitting craniotomy (54), a neurosurgical procedure where the patient's head is elevated. However, it has also occurred during other surgeries, including cesarean section (55), prostatectomy using both radical perineal (56) and retropubic (57, 58) approaches, spine surgery (59, 60), hip replacement (61), liver resection (62), liver transplantation (63), and even during the insertion of dental implants (64, 65). The risk is particularly high when large veins are open and exposed to the atmosphere under negative pressure gradients.
Everyday Activities and Uncommon Scenarios
Beyond the medical realm, some unusual or non-medical activities can also lead to gas embolism. These are less common but highlight the diverse ways gas can enter the circulatory system. For instance, blowing air into the vagina during orogenital sex (38-40) has been reported as a cause of air embolism. Similarly, sexual intercourse after childbirth (41) has been linked to cases of air embolism. These instances underscore that gas embolism is not exclusively a condition tied to complex medical interventions or high-pressure environments like diving.
The clinical impact of gas embolism depends heavily on the volume of gas and its location. While intravenous injection of oxygen at 10 mL/min has been reported as well tolerated, 20 mL/min caused symptoms (67), indicating a threshold for physiological disturbance. More importantly, intra-arterial injection of even small volumes of air can cause significant clinical deficits (66). This is because arterial bubbles can directly block blood flow to critical organs, leading to immediate and severe consequences. Compared with constant infusions, injections of air are more likely to cause clinical abnormalities (68). This wide array of causes for gas embolism reinforces the need for vigilance in various settings and highlights the critical role of HBOT as a rapid and effective treatment for this potentially fatal condition, regardless of its origin. UHMS HBO Indications 2020 provides further details on the causes and treatment of gas embolism.
Frequently Asked Questions
What is the main purpose of hyperbaric oxygen therapy?
The main purpose of hyperbaric oxygen therapy (HBOT) is to significantly increase the amount of oxygen dissolved in the blood plasma and deliver it to tissues throughout the body. This is achieved by having a patient breathe 100% oxygen in a pressurized chamber. This enhanced oxygen delivery helps to promote healing, reduce inflammation, fight infections, and address conditions where oxygen deprivation is a key factor. For instance, it's a critical treatment for conditions like carbon monoxide poisoning, where it rapidly displaces carbon monoxide from the blood.
How does increased pressure affect oxygen delivery in HBOT?
Increased pressure is one of the two key factors that make HBOT effective. As the pressure inside the hyperbaric chamber rises, more oxygen molecules are physically forced and dissolved into the blood plasma. This dissolved oxygen can then reach tissues that might have poor blood flow or are otherwise oxygen-deprived, bypassing the normal red blood cell transport system. The Undersea and Hyperbaric Medical Society (UHMS) emphasizes that this increase in pressure drives more oxygen into the bloodstream and tissues, which is fundamental to the therapy's benefits.
What conditions are approved for HBOT treatment?
The Undersea and Hyperbaric Medical Society (UHMS) has approved 14 primary indications for HBOT treatment. These conditions include air or gas embolism, carbon monoxide poisoning, decompression sickness, problem wounds, clostridial myonecrosis (gas gangrene), and delayed radiation injuries. UCLA Health, for example, bases its HBOT indications on these UHMS recommendations, ensuring that treatments are evidence-based. The 14th Edition of the UHMS's "Hyperbaric Oxygen Therapy Indications" provides a comprehensive list of these approved uses.
Can gas embolism occur from non-diving activities?
Yes, gas embolism can occur from many non-diving activities and medical procedures. Causes include accidental intravenous air injection, cardiopulmonary bypass accidents, needle biopsy of the lung, and central venous catheter placement. Surgical procedures where the site is under pressure, such as laparoscopy or hysteroscopy, can also lead to air embolism. Even massive venous gas embolism (VGE) can occur from passive entry of air into surgical wounds elevated above the heart (53), as seen in sitting craniotomy or prostatectomy.
What is the role of the Undersea and Hyperbaric Medical Society (UHMS) in HBOT?
The Undersea and Hyperbaric Medical Society (UHMS) is the leading authority that defines, approves, and sets the standards for hyperbaric oxygen therapy. They publish comprehensive guidelines, such as the "Hyperbaric Oxygen Therapy Indications," which list all scientifically supported and clinically proven uses for HBOT. The UHMS ensures that HBOT is used safely and effectively, providing a framework for healthcare providers and patients to understand the legitimate applications of this specialized medical treatment.
Sources
- https://www.uhms.org/resources/featured-resources/hbo-indications.html
- https://www.uhms.org/images/UHMS-Reference-Material.pdf
- https://www.uclahealth.org/medical-services/hyperbaric/indications
- https://healingthehyperbaricway.com/blogs/news/hyperbaric-chamber-pressures-explained-1-3-2-0-ata?srsltid=AfmBOop2rzs_jggtPAZ4ppT6puzHI8dOSvbNIGhd8iaYW1e3_aFb47EE
Related Reading
- What the Clinical Research Says About Hyperbaric Oxygen Therapy
- Does Insurance Cover Hyperbaric Oxygen Therapy?
- Medicare HBOT Coverage: The 14 Approved Indications
- Hyperbaric Oxygen Therapy for Pets: A Guide to Veterinary HBOT
- Hyperbaric Oxygen Therapy for Wound Healing: Clinical Evidence
— The HBOT Finder Team