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Geplaatst: 23-06-23 23:23
Ailill schreef:N.a.v. een link hier kwam ik een ander verhaal tegen, voor mij echt de hel. Een familie met meerdere volwassen en ervaren grot-beklimmers gaan een grot beklimmen. De zoon neemt een verkeerde afslag en komt, met zijn hoofd naar beneden, vast te zitten, voor bijna 24 uur. Afschuwelijk, live beelden van de familie, reddingswerkers en foto's van hemzelf. Hij heeft het niet na kunnen vertellen en ligt daar nog steeds in die grot.
[ Video ]
Geplaatst: 24-06-23 00:09
Geplaatst: 24-06-23 00:42
Geplaatst: 24-06-23 12:13
Geplaatst: 24-06-23 12:22
Tancreda4 schreef:noviceh schreef:Voor memes is er een apart topic:
[ENT-HK] Het memetopic
Het verhaal van Yuri Lipski vind ik ook bizar, een duiker die is overleden in the Blue Hole waarbij videobeelden zijn vrij gegeven die hij zelf gemaakt heeft: https://youtu.be/cRj0lymMMGs
Bizar... Hij gaat opeens zo rap naar beneden, z'n ademhaling die veranderd. Maar beneden nog wel de check op z'n horloge. Wat is er precies gebeurd, iemand daar een artikel of iets over? Het is zo moeilijk te bedenken voor een leek, voor mij
Citaat:@SniffBackBetter
1 jaar geleden
For those who are wondering what happened, I'll try to explain exactly what's going on with enough technical detail to make sense of it, but not so much that non-divers will be confused.
In this footage you're watching Yuri Lipski attempting what's known as a "bounce" dive, a fast descent to a given depth followed by an immediate ascent, almost always attempted by divers trying to break their own depth records. In diving circles they're known as being very dangerous, even with a lot of experience and careful planning. Without the necessary experience and planning, they're strictly frowned upon and regarded as extremeley reckless.
He'd apparently mentioned doing this bounce dive in the days before this footage was shot, and was repeatedly warned against it by fellow divers.
Recreational divers almost always dive using a single 12 or 15 litre cylinder of compressed air (the exact same air you're breathing right now, just compressed into the cylinder to get as much inside as possible) and they'll never go beyond 40 metres (131 feet) in depth.
There are several reasons for this depth limit, but the reasons most relevant to this video are as follows:
1. The deeper you go, the more the increasing pressure causes nitorgen to have a narcotic effect on the human body (and air is 78% nitrogen). Yeah it might sound crazy, but breathing air can actually be like taking a narcotic drug if you dive deep enough. This effect usually begins at around 18 metres (60 feet) and is known as nitrogen narcosis. It affects everybody differently but for most people it's safely manageable at 40 metres.
2. At a depth of around 57 metres (187 feet), oxygen as it occurs in normal breathing air actually becomes toxic to the human body, with rapidly increasing risk of seizures and death the deeper you go past that point.
3. The deeper you go, the faster you breathe your air due to the increased pressure (literally the result of all that weight of water above you pressing down). For example, on the surface, to fill your lungs with 1 litre of air takes (unsurprisingly) 1 litre of air, but at a depth of 40 metres that same breath would require 5 litres of air.
4. The deeper you go, the more the air inside your body and your buoyancy device (a piece of equipment divers use in order to control their ascent and descent) is compressed, which means the less buoyant you are and thus the more inclined your are to sink rather than to float.
5. The deeper you go, the more of the nitrogen contained within air that you're breathing is absorbed into your body. When you ascend again, this absorbed nitrogen has to leave your body and if you ascend too quickly, it can cause another extremeley serious illness called decompression sickness, so a relatively slow ascent is required. If enough time is spent at depth, what's known as decompression stops will have to be made, where the diver ascends a little, then stops and waits at a certain depth for a certain amount of time (usually calculated by the dive computer worn on the wrist), before then continuing up a little more and then stopping and waiting again, and so on (the deeper you go and/or the longer your dive, the more of these decompression stops you'll have to make as you ascend). This is known as decompression diving.
These last 3 factors combined mean that diving below 40 metres simply isn't practical for the amount of air being carried, as it'd result in a very short dive, most of which would be spent slowly ascending.
Diving deeper than 40 metres is known as technical diving. Technical divers breathe different mixes of gases that allow them to avoid the dangers of nitrogen narcosis and oxygen toxicity. They also take much more of it with them in multiple cylinders.
Now that you have this context, you'll understand how dangerous it would be to try to do a bounce dive to ~92 metres (300 feet) using a single 12 litre tank of compressed air, and this is exactly what you're watching Yuri do here.
From the start of the video to 2:42 he swims out until he's over the deepest water.
At 2:43 he goes into a slow descent.
At 3:20, still descending and still likely fairly shallow, you can hear him adjusting his buoyancy slightly using his buoyancy compensation device (BCD).
At 3:40 he's now venting air from his BCD, which will make him sink faster.
At 3:47 he goes into a rapid, head-first descent.
At 4:14 you can hear his breathing begins to make a strained, wheezing/squeaking sound as his regulator (the valve through which he's breathing the air) has to work harder to supply the much increased volume of air he's taking with each breath, each one using up a huge amount of air from his tank.
At 4:20 you can hear him briefly add some air to his BCD as he tries to slow his descent slightly.
At 5:09 you can hear some kind of alarm sounding on his dive computer, most likely a warning that he's now exceeded the maximum time possible before requiring decompression stops on his ascent.
At 5:37, he's approaching the bottom and begins to film his dive computer screen as proof of his depth to show to people later when he returns to the surface. Unfortunately, by now, he's already doomed and there's no possible way for him to return to the surface before he runs out of air.
At 5:55, after several seconds of trying to film his dive computer screen, we briefly see the maximum depth displayed on his diver computer screen- 91.6 metres, which is just over 300 feet!
The nitrogen narcosis he'll be experiencing at this point will be so extreme that it's a wonder he's even still conscious. It's also a miracle he's not already suffering severe seizures due to oxygen toxicity, although the rapid jerking, erratic movements that follow could be signs of his central nervous system being compromised.
By 6:04 he's almost delirious, staggering and thrashing around, beginning to panic.
At 6:07 he obviously has a moment of enough clarity to realise that he needs to ascend immediately, and you can hear the hiss of air as he tries to inflate his BCD which would ordinarily cause him to begin to float upwards towards the surface.
At 6:11 his BCD is likely fully inflated. At a recreational dive depth he'd now be rapidly ascending, but at this depth the pressure is so great and he's likely also overweighted, that he doesn't rise up at all. At this depth, it takes such a large volume of air to inflate his BCD that he's just used up almost all of the remaining air in his tank to do so.
By 6:13 he's probably totally confused by his lack of ascent, worsened by the severe nitrogen narcosis. He then begins to stagger and stumble around, likely now totally disoriented as he was expecting to be rising towards the surface.
At 6:32, the breath you hear is noticably shorter and quieter. His tank is almost empty.
At 6:37 we hear another short, strained breath. He now begins to panic as, even in his extremely debilitated mental state, he realises that his tank is about to run dry.
From this point on, notice how infrequently he breathes and how short and quiet his breaths are. His tank is now all but empty and he's slipping into unconsciousness. Shortly afterwards, collapses to the seabed where he dies.
Geplaatst: 24-06-23 12:43
Geplaatst: 24-06-23 12:56
Geplaatst: 24-06-23 13:10
DuoPenotti schreef:Tancreda4 schreef:
Bizar... Hij gaat opeens zo rap naar beneden, z'n ademhaling die veranderd. Maar beneden nog wel de check op z'n horloge. Wat is er precies gebeurd, iemand daar een artikel of iets over? Het is zo moeilijk te bedenken voor een leek, voor mij
In de reacties er onder staat ook uitlegCitaat:@SniffBackBetter
1 jaar geleden
For those who are wondering what happened, I'll try to explain exactly what's going on with enough technical detail to make sense of it, but not so much that non-divers will be confused.
In this footage you're watching Yuri Lipski attempting what's known as a "bounce" dive, a fast descent to a given depth followed by an immediate ascent, almost always attempted by divers trying to break their own depth records. In diving circles they're known as being very dangerous, even with a lot of experience and careful planning. Without the necessary experience and planning, they're strictly frowned upon and regarded as extremeley reckless.
He'd apparently mentioned doing this bounce dive in the days before this footage was shot, and was repeatedly warned against it by fellow divers.
Recreational divers almost always dive using a single 12 or 15 litre cylinder of compressed air (the exact same air you're breathing right now, just compressed into the cylinder to get as much inside as possible) and they'll never go beyond 40 metres (131 feet) in depth.
There are several reasons for this depth limit, but the reasons most relevant to this video are as follows:
1. The deeper you go, the more the increasing pressure causes nitorgen to have a narcotic effect on the human body (and air is 78% nitrogen). Yeah it might sound crazy, but breathing air can actually be like taking a narcotic drug if you dive deep enough. This effect usually begins at around 18 metres (60 feet) and is known as nitrogen narcosis. It affects everybody differently but for most people it's safely manageable at 40 metres.
2. At a depth of around 57 metres (187 feet), oxygen as it occurs in normal breathing air actually becomes toxic to the human body, with rapidly increasing risk of seizures and death the deeper you go past that point.
3. The deeper you go, the faster you breathe your air due to the increased pressure (literally the result of all that weight of water above you pressing down). For example, on the surface, to fill your lungs with 1 litre of air takes (unsurprisingly) 1 litre of air, but at a depth of 40 metres that same breath would require 5 litres of air.
4. The deeper you go, the more the air inside your body and your buoyancy device (a piece of equipment divers use in order to control their ascent and descent) is compressed, which means the less buoyant you are and thus the more inclined your are to sink rather than to float.
5. The deeper you go, the more of the nitrogen contained within air that you're breathing is absorbed into your body. When you ascend again, this absorbed nitrogen has to leave your body and if you ascend too quickly, it can cause another extremeley serious illness called decompression sickness, so a relatively slow ascent is required. If enough time is spent at depth, what's known as decompression stops will have to be made, where the diver ascends a little, then stops and waits at a certain depth for a certain amount of time (usually calculated by the dive computer worn on the wrist), before then continuing up a little more and then stopping and waiting again, and so on (the deeper you go and/or the longer your dive, the more of these decompression stops you'll have to make as you ascend). This is known as decompression diving.
These last 3 factors combined mean that diving below 40 metres simply isn't practical for the amount of air being carried, as it'd result in a very short dive, most of which would be spent slowly ascending.
Diving deeper than 40 metres is known as technical diving. Technical divers breathe different mixes of gases that allow them to avoid the dangers of nitrogen narcosis and oxygen toxicity. They also take much more of it with them in multiple cylinders.
Now that you have this context, you'll understand how dangerous it would be to try to do a bounce dive to ~92 metres (300 feet) using a single 12 litre tank of compressed air, and this is exactly what you're watching Yuri do here.
From the start of the video to 2:42 he swims out until he's over the deepest water.
At 2:43 he goes into a slow descent.
At 3:20, still descending and still likely fairly shallow, you can hear him adjusting his buoyancy slightly using his buoyancy compensation device (BCD).
At 3:40 he's now venting air from his BCD, which will make him sink faster.
At 3:47 he goes into a rapid, head-first descent.
At 4:14 you can hear his breathing begins to make a strained, wheezing/squeaking sound as his regulator (the valve through which he's breathing the air) has to work harder to supply the much increased volume of air he's taking with each breath, each one using up a huge amount of air from his tank.
At 4:20 you can hear him briefly add some air to his BCD as he tries to slow his descent slightly.
At 5:09 you can hear some kind of alarm sounding on his dive computer, most likely a warning that he's now exceeded the maximum time possible before requiring decompression stops on his ascent.
At 5:37, he's approaching the bottom and begins to film his dive computer screen as proof of his depth to show to people later when he returns to the surface. Unfortunately, by now, he's already doomed and there's no possible way for him to return to the surface before he runs out of air.
At 5:55, after several seconds of trying to film his dive computer screen, we briefly see the maximum depth displayed on his diver computer screen- 91.6 metres, which is just over 300 feet!
The nitrogen narcosis he'll be experiencing at this point will be so extreme that it's a wonder he's even still conscious. It's also a miracle he's not already suffering severe seizures due to oxygen toxicity, although the rapid jerking, erratic movements that follow could be signs of his central nervous system being compromised.
By 6:04 he's almost delirious, staggering and thrashing around, beginning to panic.
At 6:07 he obviously has a moment of enough clarity to realise that he needs to ascend immediately, and you can hear the hiss of air as he tries to inflate his BCD which would ordinarily cause him to begin to float upwards towards the surface.
At 6:11 his BCD is likely fully inflated. At a recreational dive depth he'd now be rapidly ascending, but at this depth the pressure is so great and he's likely also overweighted, that he doesn't rise up at all. At this depth, it takes such a large volume of air to inflate his BCD that he's just used up almost all of the remaining air in his tank to do so.
By 6:13 he's probably totally confused by his lack of ascent, worsened by the severe nitrogen narcosis. He then begins to stagger and stumble around, likely now totally disoriented as he was expecting to be rising towards the surface.
At 6:32, the breath you hear is noticably shorter and quieter. His tank is almost empty.
At 6:37 we hear another short, strained breath. He now begins to panic as, even in his extremely debilitated mental state, he realises that his tank is about to run dry.
From this point on, notice how infrequently he breathes and how short and quiet his breaths are. His tank is now all but empty and he's slipping into unconsciousness. Shortly afterwards, collapses to the seabed where he dies.
Geplaatst: 24-06-23 14:05
Geplaatst: 24-06-23 15:17
Geplaatst: 24-06-23 16:53
Sabbientje schreef:Hebben jullie wel eens gehoord van het compartimentsyndroom?
Je spieren lopen door een soort tunnels heen.
En na inspanning en/ of om medische reden kunnen die spieren teveel bloed krijgen en gaan zwellen.
Mijn moeder heeft dit in 2021 gehad na een mislukte dotter operatie aan haar been.
Eerst was haar been helemaal geblokkeerd. Kreeg geen bloed meer, vervolgens gingen ze op de plek van de blokkade bloedverdunners geven.
Hierdoor losten de blokkades op en kregen de spieren ineens teveel bloed.
Die gingen vervolgens opzwellen.
Om de druk eraf te halen, snijden ze dan het been/ lichaamsdeel open.
Zodat de spier de ruimte krijgt om uit te zetten.
Om dit later weer dicht te krijgen zetten ze een soort rijgveter in het been, die ze dan stukje bij beetje weer dicht trekken tot de wond zich weer sluit.
Ik had hier hele fotoreportages van, maar die heb ik van mijn telefoon gegooid.
Maar voor de mensen die een foto willen zien hoe dat eruit ziet: geen bloed, maar je ziet wel het inwendige de mens.
https://nl.wikipedia.org/wiki/Compartimentsyndroom
Geplaatst: 24-06-23 20:50
Geplaatst: 24-06-23 21:04
Geplaatst: 24-06-23 21:12
Geplaatst: 24-06-23 22:31
Geplaatst: 24-06-23 22:38
Shenavallie schreef:De meeste mensen die de Formule 1 volgen kennen dit filmpje van Ayrton Senna waarschijnlijk al, maar ik vind het nog steeds een bizar moment. In het filmpje rij je met de camera mee met de F1 wagen van Ayrton Senna tot het moment dat hij een fatale klap tegen de wand maakt. Hij is op slag dood.
https://www.youtube.com/watch?v=x9znf-lpg4Q
Geplaatst: 25-06-23 00:16
Shenavallie schreef:De meeste mensen die de Formule 1 volgen kennen dit filmpje van Ayrton Senna waarschijnlijk al, maar ik vind het nog steeds een bizar moment. In het filmpje rij je met de camera mee met de F1 wagen van Ayrton Senna tot het moment dat hij een fatale klap tegen de wand maakt. Hij is op slag dood.
https://www.youtube.com/watch?v=x9znf-lpg4Q
Geplaatst: 25-06-23 00:41
Tancreda4 schreef:Ik ken het alleen uit Grey's anatomy, daar Komt het vaker langs. Maar in real life nooit van gehoord verder. Hoe is het nu met je moeder?
suffie schreef:Laatst in zo'n Engelse ziekenhuis serie kwam een man binnen met gebroken benen. Die zwollen ook zo enorm op, dat ze zijn kuiten nog op de 1e hulp met spoed moesten opensnijden, anders zou hij beide benen verliezen.
Is het bij jouw moeder zonder ontstekingen genezen? Omdat het toch een langdurig open wond is. En het litteken, is dat anders dan 'normaal'?
Geplaatst: 25-06-23 09:03
Lynn_Nikita schreef:Mijn zoon is naar hem vernoemd. Wist je ook dat de dag ervoor ook iemand is overleden en hij de Oosterijkse vlag bij zich had om diegene te eren
Op vrijdag crashte al een landgenoot die Senna in het ziekenhuis bezocht, de fatale crash op zaterdag zag hij gebeuren en op zondag overleed hij zelf/
Geplaatst: 25-06-23 09:09
Rivendell schreef:Shenavallie schreef:De meeste mensen die de Formule 1 volgen kennen dit filmpje van Ayrton Senna waarschijnlijk al, maar ik vind het nog steeds een bizar moment. In het filmpje rij je met de camera mee met de F1 wagen van Ayrton Senna tot het moment dat hij een fatale klap tegen de wand maakt. Hij is op slag dood.
https://www.youtube.com/watch?v=x9znf-lpg4Q
Het gaat altijd over Senna. Je hoort haast niemand over de dood van Ratzberger die een dag eerder op dezelfde baan stierf. Ironisch genoeg was Senna de enige die naar de plek van het ongeval ging kijken.
Deze race was de eerste Formule 1 race die ik ook zag
Geplaatst: 25-06-23 09:12
Op 5:00 minuten twijfelde ik het filmpje uit te zetten, dat mensen dat vrijwillig doen! 