Causes	Neuro-logical	Cardio-respiratory	Skin	Joint
Paradoxical gas embolism—cardiothoracic shunt	Severe	Mild	Severe	None
Arterial gas embolism after pulmonary barotrauma:
Lung disease	Mild	Mild	None	None
Rapid ascent	Mild	Mild	None	None
Gas nucleation caused by unsafe decompression profile	Mild	Mild	None	Severe