Yes, after he told me that story I told him he must be Blessed By God to have survived that experience, and should start a religious cult. I think that he still has no idea how close he came to dying. Jim ------------------------------------------------------------------- Learn About Trimix at http://www.cisatlantic.com/trimix/ > From: Capt JT <captjt@mi*.co*> > Date: Wed, 02 Aug 2000 17:04:34 -0400 > To: Jim Cobb <cobber@ma*.ci*.co*>, <billy@bd*.co*.au*>, > <techdiver@aquanaut.com> > Subject: Re: death rigs > > Cobb, remember at the last meeting the young man who has a similar set up, > told how he went down to untie after his first dive and the switch was > still on the deco gas 50% and breath it at 110ft and started shaking and > nearly didn't make it up. I think we worked on him for a while and he is > going to give up that rig. > > > At 01:02 PM 8/2/00 -0400, Jim Cobb wrote: >> I don't see anything wrong with this setup, Billy. Obviously this death was >> due to diver error. I guess he forgot whether the yellow tape was air or >> nitrox. An innocent mistake anybody could have made. He should have had a >> hose wrap around the nitrox, um, or the air, that would have made everything >> better. >> >> Billy, I truly hope you are not implying with this post that weird, bizarre, >> non-standard equipment and configurations could possibly have been at fault. >> I mean the mere suggestion of this makes you a DIR goose-stepping nazi >> fanatic. >> >> It's a much better for divers to follow their own path, do their own thing. >> How could you possibly suggest that following a standard, proven gear >> configuration could do anything but stifle the creative urges of the >> aspiring techdiver. >> >> Take a look at this fellow, independent doubles with different mixes going >> to an unlabeled gas block equipped with a great big easily-moved lever. This >> fellow is, er, was obviously an genius of the highest order. >> >> I see that his wonderful, inspiring rig is now available for purchase. >> Perhaps we can all pitch in and purchase it for Black, the only person *I* >> know of smart enough to appreciate it's beauty of design and construction. >> >> Jim >> >> >> ------------------------------------------------------------------- >> Learn About Trimix at http://www.cisatlantic.com/trimix/ >> >>> From: <billy@bd*.co*.au*> >>> Date: Wed, 02 Aug 2000 20:37:41 +1000 >>> To: <techdiver@aquanaut.com> >>> Subject: Re: ABC on Diving the San Diego - STROKE ALERT >>> >>> >>>> on 7/31/00 2:24 AM, speez3 (Techdiver) at speez3@ea*.ne* wrote: >>>> >>>>> As for Tony Maffatone, he takes his >>>>> ideas, puts them on paper and makes them work. Everything he builds >> is from >>>>> his own design. This whole thread really shows ZERO intelligence from >> this >>>>> list. A proper apology is definitely in order. >>> >>> >>> Seems Maffatone is determined to take an outdated >>> and terminally stupid idea and grind it around and >>> around some-more. >>> >>> The old Kevorkian rig rears its ugly head again. >>> >>> rgds billyw >>> >>> >>> ------5. New South Wales State Coroner. Coroner's Court, 1995. File number >>> 94/574. ------- >>> >>> Clinical record >>> >>> A 47-year-old experienced underwater cave diver, with no significant >> medical >>> history, was diving with two tanks -- one containing compressed air, >> the other >>> a 50% mixture of oxygen and nitrogen (nitrox). Towards the end of the 47-m, >>> 19-min dive, he was seen floating head down, unresponsive, with his >> mouthpiece >>> out of his mouth and "his fins [flippers] moving as if he was >> shivering" (as >>> reported by another diver to the Coroner). The body was carried up to 15 m >>> depth and then allowed to ascend freely as the other divers decompressed. >>> >>> Cardiopulmonary resuscitation was attempted, but abandoned after 43 >> minutes as >>> there was no response. >>> >>> Autopsy findings >>> >>> Erect postmortem x-rays and autopsy of the body performed 24 hours >> after death >>> revealed large amounts of gas in the venous system of the trunk and >> limbs and >>> in both sides of the heart (Figure 1). The heart weighed 380 g and was >> normal, >>> apart from foamy blood and gas in all chambers. Analysis of gas from >> the right >>> ventricle showed O2 (20.6% by volume), and N2 (75.9%). There was >> bruising of >>> the tongue and petechiae on the lungs and heart. The brain (1740 g) showed >>> mild cerebral oedema and a microscopic perivascular haemorrhage in the >> floor >>> of the fourth ventricle. >>> >>> Figure 1: Postmortem erect chest x-ray, showing gas in both sides of >> the chest >>> and in the neck veins (a combination of postmortem decompression, >> perimortem >>> barotrauma and, possibly, decomposition). >>> >>> Examination of diving equipment >>> >>> Examination of the subject's diving equipment (Figure 2) revealed that >> he had >>> been breathing the 50% oxygen/nitrogen mixture for most of the dive. >> Each tank >>> had a separate first stage connected in an unusual fashion by a two-way >>> switch, which the diver had had made by a local engineering shop. This >> allowed >>> the diver to switch from one tank to another rapidly. This switch >> supplied a >>> single second-stage mouthpiece. The two tanks were different colours; the >>> circuit from the black (compressed-air) tank was marked with yellow tape, >>> while the circuit from the yellow (nitrox) tank was unmarked. >>> >>> Figure 2: Equipment used by the diver, showing the 50% oxygen/nitrogen gas >>> tank (yellow, right), compressed-air tank (black, left), yellow tape >> marking >>> the compressed-air circuit, and two-way valve which controlled the >> source of >>> the air supply (inset shows close-up of valve). >>> >>> The regulator had a small tear and a bite mark in the mouthpiece. The diver >>> wore a facemask and separate mouthpiece rather than a full facemask, which >>> covers eyes, nose and mouth. >>> >>> Discussion >>> >>> The cause of death, as determined by the Coroner, was drowning after oxygen >>> toxicity.(5) The "shivering" movements and the biting of the tongue and >>> mouthpiece suggested fitting. Using a 50% oxygen/nitrogen mixture at 47 m >>> depth, the diver had been exposed to a partial pressure of oxygen of >> 291 kPa >>> (2.9 atm), possibly for as long as 19 min. During diving, this gas mixture >>> should be used only at depths less than 14-18 m (depending on the >> duration of >>> exposure). >>> >>> Cerebral gas embolism and decompression illness were unlikely causes of >> death, >>> as the subject was unresponsive before ascent. The gas observed at autopsy >>> probably resulted from a combination of postmortem decompression >> (release of >>> tissue nitrogen), perimortem barotrauma and, possibly, a degree of >>> decomposition.(6) >>> >>> This death resulted from several compounding problems: >>> >>> 1.The diver may have turned the switch to the unmarked nitrox circuit, >>> thinking he was using the circuit to the compressed air in the black >> tank (the >>> yellow label marked the circuit from the black [compressed-air] tank, >> not the >>> circuit from the yellow [nitrox] tank). Alternatively, as the two-way valve >>> needed very little pressure to turn, it could have been accidentally >> switched >>> from a safe to an unsafe gas mix. >>> >>> 2.The diver was using a separate facemask and mouthpiece. During the >> seizure, >>> the mouthpiece fell out. A full facemask, covering both the mouth and nose, >>> should be worn by divers using oxygen-rich mixtures or carrying out deep >>> diving on compressed air, to reduce the chance of drowning should an oxygen >>> convulsion occur. >>> >>> This technical diving fatality and those reported in the United States in >>> 1992(4) were in experienced divers, who should have understood the dangers. >>> >>> source: "an article published on the Internet by The Medical Journal of >>> Australia <http://www.library.usyd.edu.au/MJA/>" >>> >>> >> >> >> -- >> Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >> Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > > "You can't learn to dive on the net, sooner or later you have to get in the > water" > Your Guide to Great Wreck Diving along the East Coast & more > Web Site http://www.capt-jt.com/ > Email captjt@mi*.co* > > > -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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