What are the risks of hyperbaric therapy

1. Understanding the Treatment Environment

In HBOT, you breathe pure oxygen inside a chamber pressurized to 1.5 to 3 times normal atmospheric pressure. This environment helps oxygen dissolve more efficiently into your blood plasma, but the increased pressure and oxygen concentration can affect the body in several ways.

While serious complications are rare when performed under medical supervision, certain physiological changes can pose risks — especially if the therapy is done too frequently, at high pressures, or without proper screening.

2. Common and Mild Side Effects

These are the most frequently reported and generally temporary side effects of hyperbaric oxygen therapy in uk :

a. Barotrauma (Pressure-Related Ear or Sinus Pain)

• As pressure increases, air spaces in your ears, sinuses, and lungs must equalize.

• If pressure changes too quickly, it can cause ear barotrauma (pain, popping, or fluid accumulation) or sinus discomfort.

• How to prevent it: Slow compression/decompression, swallowing, yawning, or using the Valsalva maneuver during treatment.

b. Temporary Vision Changes

• Repeated sessions may cause temporary nearsightedness (myopia) due to changes in the eye lens shape from oxygen exposure.

• This usually resolves within days to weeks after treatment ends.

c. Mild Fatigue or Lightheadedness

• After leaving the chamber, some people feel tired or dizzy for a short time due to changes in oxygen and pressure levels.

• Usually resolves quickly with rest and hydration.

d. Claustrophobia

• Being in a sealed, enclosed chamber can trigger anxiety or claustrophobia in some individuals.

• Transparent walls, communication systems, or mild sedatives can help if necessary.

3. Moderate to Serious Risks (Less Common)

Though uncommon, there are more serious complications that can occur if HBOT is not properly managed or if underlying health conditions are present.

a. Oxygen Toxicity

• Breathing pure oxygen for extended periods can overwhelm the body’s antioxidant defenses, leading to oxygen toxicity.

• Symptoms may include:

  • Chest pain or coughing

  • Muscle twitching (especially around the face)

  • Nausea or dizziness

  • Seizures (very rare, in high-pressure exposures)

• This occurs mainly when oxygen pressure or duration exceeds safe limits. Certified HBOT centers strictly control these parameters.

b. Pulmonary Barotrauma (Lung Injury)

• If a person holds their breath during decompression, expanding air in the lungs can cause alveolar rupture or pneumothorax (collapsed lung).

• That’s why controlled breathing and medical monitoring are essential.

c. Sinus or Dental Barotrauma

• Air trapped in sinus cavities or under dental fillings may expand during pressure changes, causing pain or damage.

• People with sinus infections, colds, or recent dental work should delay HBOT until healed.

d. Middle Ear or Tympanic Membrane Rupture

• In rare cases, excessive pressure without equalization can rupture the eardrum.

• Patients are trained to equalize pressure and monitored closely to prevent this.

e. Hypoglycemia in Diabetic Patients

• HBOT can enhance insulin sensitivity, which may cause low blood sugar in diabetics using insulin or oral medications.

• Blood glucose levels should always be checked before and after each session.

4. Rare Complications

Though extremely rare in clinical settings, the following have been documented in medical literature:

a. Seizures

• Resulting from oxygen-induced central nervous system toxicity.

• Typically occurs only under prolonged high-pressure exposure (above 3 ATA).

• Seizures usually resolve once the oxygen concentration returns to normal.

b. Pulmonary Edema (Fluid in the Lungs)

• May occur in individuals with pre-existing heart failure or lung conditions when exposed to high pressures.

• Careful screening and monitoring prevent this risk.

c. Fire Hazard

• Since pure oxygen is highly flammable, strict no-spark and no-flame safety protocols are mandatory in HBOT facilities.

• Modern chambers have multiple safety systems to prevent ignition or electrical faults.

5. Who Should Avoid or Use Caution with HBOT

While HBOT is safe for most patients, there are specific contraindications — situations where treatment may be unsafe or needs strict medical oversight.

Absolute Contraindications (HBOT should NOT be performed):

1. Untreated Pneumothorax (Collapsed Lung):

   • Pressure changes can worsen lung collapse or cause fatal injury.

2. Certain Chemotherapy Drugs:

   • Medications like bleomycin, cisplatin, or disulfiram can increase the risk of oxygen toxicity.

3. Severe Emphysema with CO₂ Retention:

   • Can worsen gas exchange problems.

Relative Contraindications (Proceed with medical supervision):

• Pregnancy (unless life-saving HBOT is needed, such as for carbon monoxide poisoning)

• Seizure disorders

• Chronic sinus or ear infections

• Recent ear surgery

• Upper respiratory infections or cold

• Fever or uncontrolled high blood pressure

• Severe heart failure or arrhythmia

Each patient should undergo a medical evaluation and lung imaging (if necessary) before starting HBOT.