Hi Fellas,
I don't think so optimistic. Sleep apnea is not the same as training, because a life time of hypoxia induces pulmonary hypertension, and righ heart hypertrophia and dilation.
Night wheezing indicates only poor control of asthma.
The fact that many elite swimmers and some freedivers have suffered asthma in childhood, for me, is proof that human beings can overcome any disability and succeed.
The barotrauma during ascent is extremly rare, but it happens (Bayne CG, et al. Can pulmonary barotrauma cause cerebral air embolism in a non-diver? Chest 1982;81:648-650) they describe a case of a breath-hold in a swimming pool, that end in fatal air embolism, the guy was doing 25 yards of apnea in a 2 meters depht pool. The autopsy was conclusive of pulmonary barotrauma and brain embolism.
The theory that air shift within the lung to a compartiment that get full at depht, and get closed off before the ascent can be reviewed at
Dahlback GO, Lundgren CEG. Pulmonary air-trapping induced by water immersion. Aerospace Med 1972;434:768-764
I don't want to sound fatalistic, probably this will never happens to you, but as a physician my duty is to tell you the dangers. You decide on what to do.
Maybe will be good for you to get a peak flow meter, and do a test before dives, in that way you will be fully sure that your lungs are working at full capacity. And of course avoid immersion if you have cold or any lung or sinuses infections.
Hope I don't get bad karma, but facts are facts
|
