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Please provide citations that hyperoxic environments lead to increased rates of metabolism, glycolisis & a shift to beta oxidation. Thnx. Esat Atikkan --- Matej Simonic / Testing LTD <mail@te*.si*> wrote: > Sent on behalf of Dean Horvat. > BR > Matej > > > There are some missing facts in Mr. JT's report, > such as the diver's age, > > physical condition, pre-existing medical > condition(s), physical activities > > prior to and during the dive, dive conditions > (esp. cold & currents) and > > breathing mixtures (if any). However, having > examined the existing facts > of > > the dive, oxtox diagnosed by the attending MD is a > far guess. > > In my opinion, the resulting condition, though > symptomatically simmilar to > > oxtox, was a manifestation of exercise-induced > hypoglycemia (low blood > > sugar). There is a fact in favour of this theory: > the affected diver had > > actually had enough time to percieve the > condition, swim to his buddy and > > signal that something was wrong before the seizure > took place. The onset > of > > acute oxygen toxicity, on the other hand, usually > does not allow enough > time > > for the diver to react in order to avoid a seizure > (the well known > ?VENTID? > > oxtox signs/symptoms were actually collected > post-festum by surviving > > affected or monitored in controlled environment). > > Nevertheless, oxygen plays an important role in > this episode: higher than > > normal ppO2 actually accelerated aerobic > metabolism of the diver thus > > burning his low blood sugar even faster, resulting > seizure some time after > > the metabolical switch from liver glycogene > glycolysis (short-term energy > > store) changed to glycolysis from beta-oxidation > of fatty accids > (long-term > > energy store). Time margin, critical for this > metabolic switch in which > > metabolic processes of beta-oxydation of fatty > acids start well before > liver > > sugar is completely exhausted, was in this case > too short due to > accelerated > > oxydation by higher than normal ppO2. Simply put: > diver's body did not > have > > enough time to properly accomodate and meet > metabolical demands because of > > increased ?burning?. > > There may also be some other pre-existing medical > conditions that could > lead > > to such an outcome: the diver should consider a > medical examination on > > diabetes and epilepsy. > > > > Advice for further diving: > > 1. proper hydration before, (during on long dives) > and after a dive. > > 2. sufficient intake of fruit sugars in a form of > different fruits (esp. > > apples, bananas, grapefruit and pineapples) and > honey > > 3. limit physical activity, pay attention to > proper breathing > > 4. proper physical condition for the dive > > 5. lower ppO2 in breathing mixtures > > 6. military: never use CO2 for dry-suit > inflation/thermal protection. Ar > is > > a gas of chioce. > > 7. wear full face mask - flush regularly > > > > Safe diving, > > > > Dean Horvat. > > > > __________________________________________ > > ----- Original Message ----- > > From: Matej Simonic / Testing LTD > <mail@te*.si*> > > To: <norik-sub-l@am*.si*> > > Sent: Tuesday, July 17, 2001 7:21 AM > > Subject: Fw: The Seizure > > > > > > > > > > ----- Original Message ----- > > > From: "Capt JT" <captjt@mi*.co*> > > > To: <vbtech@ci*.co*> > > > Cc: <techdiver@aquanaut.com>; > <FLTechDiver@mikey.net> > > > Sent: Monday, July 16, 2001 11:11 PM > > > Subject: The Seizure > > > > > > > > > > I will write a regular trip report in a couple > of days, but think > > everyone > > > > would be interested in this now... > > > > > > > > The Seizure: > > > > > > > > The diver had made their previous dive some 24 > hrs before and prepared > > for > > > > the last dive of the trip along with 2 divers > that would accompany > them. > > > > The divers had only intended to stay 15 min > to 220ft, the 2 other > > divers > > > > had made dives that morning and were making > conservative second dives. > > > > > > > > The dive went as planned, 16 mins BT had been > done and the diver > elected > > > to > > > > dive 20 min tables, all 3 ran exact profiles. > All divers were on board > > but > > > > 4 when I went over to unshackle and make a > breakable tie in to remove > > our > > > > mooring. I saw the diver who was decoing on > our hang bar at 20ft and > > they > > > > looked fine. I took a minute to relax on the > hang bar before I > descended > > > > and everything looked fine. > > > > > > > > The following events were told to me as I was > not back on board until > 20 > > > > mins after I went down. > > > > The diver realizing something moved over to > the buddy and signaled > > > > something was wrong, the buddy not knowing > what was wrong asked if > they > > > > wanted to go up. The buddy also knew that they > were diving 20min > tables > > > for > > > > a 16 min BT and had already done 18 min of the > 20 min required stop at > > > > 20ft. The diver should be clean enough to > surface. > > > > > > > > A normal ascent was made by the 2 divers from > 20ft only the buddy had > > put > > > > himself in the face to face position. At 5ft > the diver seized and the > > reg > > > > came out of their mouth. Bubbles exited the > divers mouth during the > > > > remainder of the ascent and once on the > surface a call for help was > made > > > by > > > > the buddy, another diver jumped in and the > victims head was raised out > > of > > > > the water, the body was in a complete convulse > and the arms were so > > stiff > > > > they could not be bent to remove the gear and > the harness was then > cut. > > > The > > > > diver was pulled from the water, within a > minute of being out of the > > water > > > > the seizure stopped and the victim puked, lips > were blue and color had > > > gone > > > > from the face during the seizure, with in > seconds those things > returned > > to > > > > normal after the seizure. The drysuit was > removed, the victim was > > unaware > > > > of what had happen and was disoriented, 02 was > administered. The Capt > > went > > > > and made a call to the USCG. > === message truncated === __________________________________________________ Do You Yahoo!? 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