Decompression Sickness (DCS): Where the nitrogen absorbed into the body’s tissues during a dive as a result of pressure changes does not have time to diffuse from the tissue back into the bloodstream and be eliminated by the lungs. That nitrogen stays as bubbles in the tissue, blood or lymphatic system. Any organ in the body may be affected.
Arterial Gas Embolism (AGE): A bolus of gas or air within the blood vessels, which may be caused by over-inflation of the lungs following traumatic chest injury, secondary to distension or barotraumatic rupture of alveoli due to trapped gases in scuba divers. Can also occur during mechanical ventilation.
Headache or other body pain (joint)
Irritability, confusion, decreased GCS
Speech, visual/hearing disturbances
Pulmonary Barotrauma: Injury produced as the result of volume increases in air-filled cavities expanding on ascent.
Surgical emphysema around neck
Note circumstances surrounding the event including dive history — depth, duration, repetitive dives, ascent, time of onset of problem.
Definitive treatment for decompression illness is recompression and should be sought as soon as possible. Fiona Stanley Hospital provides hyperbaric treatment for Western Australia.
A supine posture without leg elevation is recommended in injured divers suspected of DCI as it has been shown to increase the rate of inert gas elimination. It may also reduce the likelihood of arterial bubbles migrating to the brain.
However, if a conscious diver is having increased SOB when supine, they can be placed in a position of comfort.
Administration of 100% oxygen reduces the size and number of gas bubbles in the bloodstream and tissue by helping to eliminate the inert gas in the bubbles and blood.
Symptoms of arterial gas embolism almost always begin within 10 minutes of surfacing and are primarily neurological in nature.
Joint pain can occur at depths less than 10 m, and any joint pain within 24-48 hours of a dive should be treated as decompression sickness.
Obesity lengthens the time during which the diver is at risk of DCI, as nitrogen is slowly absorbed and slowly released.
Coronary artery emboli may present as an acute myocardial infarction or dysrhythmia.