>Whenever a diver complains of chest pain, several possible diagnoses must be ruled out. The first is pulmonary barotrauma, an over-pressure injury to the lung; the other is a related pneumothorax, or lung collapse. Both conditions can cause chest pain, especially when the injured person tries a deep breath. To rule this out, a physician can use a chest X-ray, a spiral CT scan or listen to the individual's breathing. The examining physician should rule out any cardiac event like a mild heart attack.
>Finally, it has to be determined whether your pain is really DCI disguised as chest pain. After a physical examination and an X-ray have eliminated the above-mentioned potential diagnoses, osteochondritis is a reasonable diagnosis, although it is not very common in scuba divers.
>Any physical activity involving lifting or straining against a heavy weight may have caused this inflammation. It is impossible to know which activity triggered this episode. Straining against the weight of your tank, which is shifted upward as you fall out of the boat backwards, may have caused an inflammation. For those who have never used a roll-in entry, it is generally practiced from a smaller boat or inflatable craft. It will allow multiple divers to enter the water at the same time, and divers don't have to stand up in the boat after donning their equipment.
>The inflammation may also have begun as you lifted yourself from a sitting position balancing your weight as you moved backward and upward to the gunwales of the boat. This is not a common body movement in everyday life. It may have even begun from just lifting luggage off the airport conveyor belt.
>It is impossible to say when it occurred, but all it would have taken was enough stress to irritate the cartilage. Then either the repetitive movement of gearing up to dive, falling into the water backward or perhaps even breathing underwater against the resistance of your equipment further aggravated the condition.
>The resolution of your symptoms after taking medications and refraining from further diving seems to have been the right advice. Once you are free of symptoms and back to full activity, begin diving again.