You did a really good job explaining this for people who aren't educated on this topic...like myself. Thank you!

@LakeHickoryScuba

4 жыл бұрын

You're welcome into the mystic. Glad you enjoyed the video and that you found it educational.

Experienced this for the first time, weekend before last. Diving on air at 98ft. in a cavern. Pretty crazy experience.

@LakeHickoryScuba

6 жыл бұрын

Glad to know you made it back safely.

@hydriodic

6 жыл бұрын

LakeHickoryScuba Thank you! it was very mild. soon as I felt it coming on there was a weird taste in my mouth and tingling in my fingers. Training kicked in and I elevated myself in the water column and it quickly subsided. I can definitely see how it could quickly become dangerous though.

@LakeHickoryScuba

6 жыл бұрын

That is a prime example how a diver should handle Nitrogen Narcosis. The symptoms quickly subside the shallower you get. Glad to hear that you resorted back to your training. Over time your body will adapt to the partial pressure of Nitrogen at 98 feet. Just go slow with it. Happy Diving.

Went diving today with a goal 150ft, I have been to 125 before with out issues. However today I got narced so bad it scared me, thankfully I was able to revert back remember my training and talk myself through it. I tapped my partner explained in the best undwater lingo I could and made our way to the surface.

@LakeHickoryScuba

Жыл бұрын

Hello matthew christian fournier, a lot of divers want to extend their range underwater. But always remember that recreational limits are 130 feet. Make sure you receive proper training to extend you depth beyond that. If you are technically certified to depths greater than 130 feet, its good to know that you were able to work through the narcosis and made it back safely.

Thanks again for another very interesting (and important) video 😀 Have any of your students had a bad experience with nitrogen narcosis during an Deep Diving course for instance ?

@LakeHickoryScuba

6 жыл бұрын

Yes, In fact I have had a few that have been hit with Nitrogen Narcosis. It’s very common actually, especially for newer divers. When the diving bug has hit them, they tend to take classes back to back, and the Deep Diver Course is very popular with them. This is why we take it very slow with them, and although we still follow standards of the training agencies, our instructors myself included will usually require each Deep Diver student to have at least 20-25 dives under their belt before we conduct the 3 training dives (1 to 60ft, 1 to 80 ft, and 1 to 100 ft) required for certification.

Brian first off thank you for the videos and all the knowledge you pass on im bout to start my open water pool session and nitrox ....i do have one question you mention building up a tolerance is this done yearly persay or is it something that once you acquire its permanent

@LakeHickoryScuba

4 жыл бұрын

Hello David Demerly, great question. Building up a tolerance for Nitrogen, or more specifically the effect of Nitrogen at depth, comes with time. We are all susceptible to Nitrogen Narcosis, but the more we dive, the more we can adapt to the effect of a said gas. In this case being higher partial pressures of Nitrogen, which lead to Nitrogen Narcosis.

Hey Bryan, I've only just started to watch your channel, so forgive me if i get ahead of myself, but I wanted to suggest (from a student's perspective) that you maybe explain where those 1.4 & 1.6 numbers come from. I say this b/c I recently took my SDI Nitrox course online and I learned about the lethal effects of 100% oxygen at just 20 feet! I was fascinated by the science behind that and when I learned how they got that 1.6 it drove the point home for me and it really made me pay attention to partial pressures and "WHY." Know what I mean? Because even with nitrogen narcosis it is important, but not necessarily "deadly" (please give me some leeway here). However, when it comes to oxygen toxicity it is straight-up, immediately LETHAL. Again, I am brand new to this and I hope I understood everything correctly, but that just stuck in my head. Thanks for the awesome info. You're doing a great job!

@LakeHickoryScuba

4 жыл бұрын

Hello Frank, I will be happy to explain the 1.4 and 1.6 in regards to Nitrox. Thank you for watching our videos, and if you ever have any questions, please let us know, and we will make a video for you.

Great video sir ❤❤

@LakeHickoryScuba

8 ай бұрын

Hello @dorarmonnobita7685, glad you liked the video.

Dear Sir, Greetings! May I know where did you get the 3.18 and 1.4? Can you please show us how did you derive those numbers? Thanks, KC

@LakeHickoryScuba

3 жыл бұрын

Hello Kevin Castro, both the 3.18 and 1.4 are the partial pressures of both Nitrogen and Oxygen at a given depth respectively. This is also based off the minimum depth of both Nitrogen Narcosis and Oxygen Toxicity.

well u helped me in understanding henry's law.....

@LakeHickoryScuba

Жыл бұрын

Hello abhijitdora7887, glad you found our video helpful.

More lectures for review .. Bravo 🎖

@LakeHickoryScuba

4 жыл бұрын

Glad you liked our video atty joey tamayo.

Nice touch with the beer bottle Bryan once again you hit it on the nail. Here's a question, what if your a heavy diver would it hit you the same as a regular size diver or take longer to release from your body, because of more mass or fat I should say. Lol

@LakeHickoryScuba

6 жыл бұрын

Great question, and I'm not sure if I can answer that one. I would assume since Narcosis is more neurological than a symptom such as alcohol intoxication, it would lead me to believe that there wouldn't be much difference. I just answered another question for a a viewer, and compared the same situation to an alcoholic with a high blood alcohol content, yet still had control of his basic motor skills, because of his body's ability to adapt to such a high level of alcohol in his blood (this of course being a result of drinking on a regular basis, very similar to a diver in my shoes, who has been diving for 30 years with nearly 6000 dives). The biggest difference is that the alcohol in the blood takes a significant amount of time to leave the body, to where the narcotic effect nitrogen is based purely on the partial pressure of nitrogen at depth. If you lower the partial pressure, then the effects of the Nitrogen Narcosis diminishes rapidly. At the end of the day, this would be a great question to pose to The Divers Alert Network, to see if they have any studies that might answer that question.

MOST IMPORTANT THING IN DEEP AIR DIVING IS TO ASK YOURSELF: HOW DEEP IS DEEP ENOUGH? My Colleague dismissed this point. One week later he died trying to break his record" RIP James, Aged 19

@LakeHickoryScuba

Жыл бұрын

Hello 100 Music Playlists, sorry to hear you lost your colleague.

@keziahkeziah

Жыл бұрын

so sorry to hear this. hope you are doing well

I have a question. The last tank.. The one written with the best mix, is that the standard oxygen-nitrogen composition tank for open water divers?

@LakeHickoryScuba

4 жыл бұрын

Hello Leon, this video was meant to make divers think conservatively. We looked at the toxic effect of Oxygen and the narcotic effect of Nitrogen, and since the theory of diving is simply that, theoretical, we picked a mix that would not exceed a 1.4 partial pressure of Oxygen, but at the same time keep the partial pressure of Nitrogen low enough as to help prevent Narcosis from setting in.

Does breathing the tri-mix gas have any effect above 30 meters or are you specifically only supposed to breath it at lower depts?

@LakeHickoryScuba

3 жыл бұрын

Hello Taylor McDaniel, there are a lot of Tri-Mix Divers that prefer to dive it at shallower depths for longer dive times and having a higher safety value.

@taylormcdaniel603

3 жыл бұрын

@@LakeHickoryScuba gotcha. If I ever dive in anything lower than 30m I'm using that in case something goes wrong and end up too low then

I want to come take a mathematics class off you It is very interesting

@LakeHickoryScuba

6 жыл бұрын

Come on down. I love math and science.

@Ex7878

6 жыл бұрын

Agreed 100% Brian could talk all day and I would listen. Some people just have the ability to grip you when talking. Brian is one of them.

@LakeHickoryScuba

6 жыл бұрын

Thank You for the kind words.

Hi. What are a typical symptoms of NN behavior. Is it easy for Instructor to determine NN is affecting on diver or buddy? Is it possible to be affected by NN and not recognize it by youreself? Thanks!

@LakeHickoryScuba

6 жыл бұрын

In short, the symptoms for Nitrogen Narcosis are similar to the same symptoms as someone who is intoxicated with alcohol. They can range from unnoticeable minor symptoms or mild impairment, all the way to severe Hallucinations. Mild euphoria, delayed response, anxiety, sleepiness, impaired judgement, dizziness, hysteria, and loss of memory are several more common symptoms. For most instructors, we can see the most common signs in other divers or our buddies, and can act upon them quickly. As far as having symptoms, and not noticing them, you absolutely can. I recently responded to another subscriber who asked me if I had ever been hit with Nitrogen Narcosis, and I told him that after 30 years of diving and nearly 6000 dives, I don't believe I have ever been hit. The truth is, it's possible that I have, but never noticed it, simply because over the years my body has adapted to higher partial pressures of Nitrogen, the same way as an alcoholic's body adapts to the effects of alcohol. His blood alcohol content rises as would anyone who consumes it, but his ability to deal with the symptoms would be greater, than say someone who does not drink. Each diver will have a different tolerance level for higher partial pressures of Nitrogen over time. The more you dive, the more you can take, the less you dive, the less you can take.

@igorshingelevich7627

6 жыл бұрын

Thanks for yore replies and sharing such rare experience via this Channel. Dive safe.

@LakeHickoryScuba

6 жыл бұрын

You're welcome

Very informative sir, one question please. Is nitrogen narcosis also occur when if one is roaming around like an hour beneath 50-60 feets deep?

@LakeHickoryScuba

3 жыл бұрын

Hello Vanlal Rosangliana, Nitrogen Narcosis is caused by the narcotic effect of nitrogen at higher partial pressures. Not so much on the saturation of nitrogen. This can typically occur at depths between 60-100 feet. By staying longer at those depths, you are more likely to oversaturate with nitrogen causing Decompression Sickness not Nitrogen Narcosis.

Thanks to help me to understand. Meanwhile its hard to knowing Component in that mix gas

@LakeHickoryScuba

2 жыл бұрын

Hello fai lubis, glad you found the video helpful. The easiest way to know what blend you have (meaning the partial pressure of the gases in the mix), is to use a gas analyzer.

Does NN have anything to do with descending too fast?

@LakeHickoryScuba

6 жыл бұрын

It can be a contributing factor, since a fast descent would not allow a persons body to process the immediate onset of a higher partial pressure of Nitrogen. But in general, a fast descent is more likely to contribute to a ruptured ear drum, otherwise know as a round window rupture.

Would the N2 calculation be the equivalent narcotic depth?

@LakeHickoryScuba

6 жыл бұрын

In theory, one could assume so, based off the partial pressure at a given depth. Unfortunately, it’s only an assumption. The biggest issue is, each diver’a tolerance to the narcotic effect’s of Nitrogen is different from the next. We are all susceptible to Nitrogen Narcosis, but on different levels. We used 100ft(sw) in the video as a base line, primarily because that seems to be the standard for most training agencies when teaching Open Water Courses.

Perhaps I've just got low nitrogen tolerance at 30 dives which are generally < 70'. I was at 95' on EANx32 and got narc'd hard, I thought I would've been immune to it but everyone is different I suppose. Came up 10' and it started to clear quickly.

@LakeHickoryScuba

2 жыл бұрын

Hello Verosika Mayday, we all are susceptible to Nitrogen Narcosis. But over time a diver's body will build up a small tolerance to it.

What do you call it, when one is in say 5 foot of water, and she is 5foot 2....but is sob, not while swimming, but simply floating treading water. This always got to me. From when I was a kid, would feel better once my chest and upper abdomen were above water line. In a swimming pool. Would never get into ocean, except up to hips. Just dont feel safe doing it.

@LakeHickoryScuba

5 жыл бұрын

Sounds like a simple case of fear of the water. Aquaphobia to be exact.

Thanks! Nitrogen, tanks, hoses, and regulators are cheap, and at atmospheric pressure, as it approaches 100%, its effects increase. A painless path to complete anoxia. I've used it to euthanize a dying cat, and I have another tank for myself, in case I develop dementia. Yeah, I know there are trolls who will tell me to go ahead.

@LakeHickoryScuba

2 жыл бұрын

Hello Mark Edwards, hopefully you will change your mind. Happy Diving.

@saulgoodman7858

2 жыл бұрын

Nice man

Came here after watching the yuri diver death. Crazy stuff

@LakeHickoryScuba

Жыл бұрын

Welcome to us James B. Glad you found us. Hopefully, you will find our videos educational and helpful.

Confused: So your "magic circle" is telling you your best mix would be EANX 34 would it not? Where did the EANX 29 come from?

@LakeHickoryScuba

5 жыл бұрын

Hello Mark, great question. In short we have taken into consideration the following. Nitrogen Narcosis is primarily developed between 80 and 120 feet of salt water, we took into consideration the narcotic partial pressure of Nitrogen at 3.18%, and the oxygen toxicity level of Oxygen above the 1.4 threshold. And using the 80-120 feet of salt water as a whole depth (primarily using 120 as a max depth based of .21%ppo2 and .79%ppn2), the .34% will not allow you to get to the 120 feet of saltwater (the theoretical max for Nitrogen Narcosis on standard air .21%) without exceeding a thresh hold of 1.4 Partial Pressure of Oxygen, thus no safety factor, and severely increasing the chance of Oxygen Toxicity. For what it is worth, me personally, I would use .34% Enriched Air Nitrox (which once again you have rounded up to .35% from .347%) and not think twice about it. But the intent of the video was to get divers to think outside the box, in regards to not only Oxygen Toxicity but also Nitrogen Narcosis. If we had a concrete depth where we could say this is the depth where Nitrogen Narcosis sets in for every diver, then it would be much easier to say definitively, this would be the best mix. Dive theory is just that, a theory. The physiology of each diver's body is different from the next, and so we use the rule of averages (Old School Dive Charts) to come up with a conservative method.

@blackntan150

5 жыл бұрын

@@LakeHickoryScuba So if I'm going strictly from the math then the "best mix" for 120ft would be EANX30 : ((120+33)/33) = 4.64 1.4 / 4.64 = .301. So are you going to EANX29 for a little safety margin from 30?

@LakeHickoryScuba

5 жыл бұрын

Yes, the 29% is a safety margin, not only for Oxygen Toxicity but also for Nitrogen Narcosis as well. 30% would be the ideal mix, based off the magic circle alone. The biggest issue we face would be a diver's individual tolerance to nitrogen between the depths of 80 ft and 120 ft (which happens to be the highest chance of narcosis, with in recreational limits). No matter the math we do, the theory of Nitrogen Narcosis is not concrete for every diver. I have been diving for over 31 years with nearly 6200 dives, and can definitively say, "If I was ever Narc'ed, I never felt it." (And considering the tolerance my body has built up over the years, it is understandable.) Yet I see narcosis in almost all of my new Deep Diving Students who have less than 100 dives under their belt. It is always a good idea to plan more conservative dives in general, and not just on Nitrogen Narcosis, but also Oxygen Toxicity. So in theory (not concrete) balancing both the partial pressures of Oxygen and Nitrogen to a more conservative number never hurts. Your math is spot on, and for the record I agree with it. The purpose of the video was to show that sometimes we get caught up on only worrying about the toxic effect of Oxygen, and we neglect the fact the Narcosis we get from higher partial pressures of Nitrogen vary greatly diver to diver. One side note, all tables and computers are conservative by nature, some more so than others. Even calculating a 1.4 partial pressure of Oxygen is conservative, considering some push the 1.6 partial pressure. So to say that either Oxygen Toxicity or Nitrogen Narcosis would set in at a particular depth would not be accurate for every diver out there. We know this by all the bounce dives made in the 50's and 60's by our diving pioneers on air to depths, by today's standards, would flip the scuba industry on its head. With a better understanding of diving physics today, we see that these divers were not only lucky to say the least, but more so living proof (at least some of them) that decompression theory is simply that, theory. And please don't think I am going against the system, I believe all divers should stay well with in the limits of the tables they train on and even their computer's limits. I want all divers to understand as much as they can about the physiology of their body, and how pressure effects it. Hopefully that explains it a little better.

I aliken the effects more to marijuana than to alcohol personally, at least from what I felt when diving and experiencing NN myself.

@LakeHickoryScuba

11 ай бұрын

Hello @kierancowface, thank you for sharing your experience with us. We encourage all divers to refrain from any and all impairing substances while diving. But the comparison should be noted.

Not clear....in best mix EANX 29 why the partial O2 at see level is .34 and not .29 ?

@LakeHickoryScuba

3 жыл бұрын

Hello MG photography, its based off conservatism. Dive theory is theoretical at best. We try to balance out the given amount of O2 that can be used (the toxic amount based off the partial pressure of O2 at depth) and the narcotic amount of N2 (the narcotic amount based off the partial pressure of N2 at depth), without pushing those limits to the max. Hope this helps.

@mgphotography3074

3 жыл бұрын

@@LakeHickoryScuba Have sense...thanks !

Sorry, why would 29% oxygen be best at 100ft? 0.29 (fraction of O2) x 4 (ATA at 100ft / 30m) = 1.16 With a limit of 1.4 PPO2: 1.4 / 4 = 0.35 so nitrox 35 would be the best mix to minimise the chance of narcosis at 100ft

@LakeHickoryScuba

6 жыл бұрын

Yes you would be correct and I agree with you (as you can see in the video in the last circle on the right.), minus the rounding up of .347% to .35% (I always make my dives slightly more conservative than the average diver). However, since Nitrogen Narcosis is primarily developed between 80 and 120 feet of salt water, we took into consideration the narcotic partial pressure of Nitrogen at 3.18%, and the oxygen toxicity level of Oxygen above the 1.4 threshold. And using the 80-120 feet of salt water as a whole depth (primarily using 120 as a max depth based of .21%ppo2 and .79%ppn2), the .34% (which you have rounded up to the nearest decimal point as .35%) will not allow you to get to the 120 feet of saltwater (the theoretical max for Nitrogen Narcosis on standard air .21%) without exceeding a thresh hold of 1.4 Partial Pressure of Oxygen, thus no safety factor, and severely increasing the chance of Oxygen Toxicity. For what it is worth, me personally, I would use .34% Enriched Air Nitrox (which once again you have rounded up to .35% from .347%) and not think twice about it. But the intent of the video was to get divers to think outside the box, in regards to not only Oxygen Toxicity but also Nitrogen Narcosis. If we had a concrete depth where we could say this is the depth where Nitrogen Narcosis sets in for every diver, then it would be much easier to say definitively, this would be the best mix. Dive theory is just that, a theory. The physiology of each diver's body is different from the next, and so we use the rule of averages (Old School Dive Charts) to come up with a conservative method.

@clarkeysam

6 жыл бұрын

LakeHickoryScuba interesting the rounding doesn't exist if you use metric units, as you can see 1.4 / 4 is 0.35, there is no rounding.

@LakeHickoryScuba

6 жыл бұрын

You would be correct again. Just goes to show that depending on where you learn (that is where you learn in the world) and depending on the system used, metric or imperial, that decompression theory is just that theory. Think of it like this, tables are more conservative than the math, and computers are more conservative than the tables. So to say that if you were to violate the computers it would be dangerous, however, not completely accurate, and to say that if you were to violate the tables it would be dangerous, however, not completely accurate, and to say that if you were to violate the math it would be dangerous, however, would not be completely accurate, all because the theory is based off the rule of averages. And since each diver's physiology is different from the next, then one diver could go beyond the computer limits and be fine, and the next could develop decompression sickness. The same applies with the tables and math. In the end, we have to make the decision for ourselves. Me personally, I believe in being as conservative as possible with dive planning, just to be on the safe side. Have I made pretty liberal dives, absolutely, but I still like the safety margin of conservative diving. When I started diving in the 1980's, I used the PADI half time tables and the US. Navy tables. Then the standard PADI Recreational Dive Planner, then the PADI Wheel, then PDIC /SEI Dive Charts, then started using computers, then the SSI Dive Tables. All have different No -Decopression Limits, so in comparing them all, it just goes to show that theory is just theory. Great discussion, and great points made about using the metric system and not having to round up.

@clarkeysam

6 жыл бұрын

LakeHickoryScuba yeah it just goes to show why the current systems have in built safety factors. I believe humans naturally see the world around them in a linear manner, however exponentials are often more appropriate and are a powerful concept. For example you plan a dive to a depth where the NDL is 32min, so you plan a 30 min duration, if you reduced the dive time by 10% to 27min the possibility of getting a DCI hit would reduce by significantly more than 10%. Anyway nice chat.

@LakeHickoryScuba

6 жыл бұрын

Same to you.

Thank you Brian. Very clearly explained but, isn´t the line between narcosis and not narcosis very thin? It doesn´t matter what mix you use. In other words, at 100 ft either the OxTox kills you or you kill yourself because you are drunk. Said in another set of words, 100 ft is physiological limit for recreative diving and not the 130 ft that the open water license says.

@LakeHickoryScuba

Жыл бұрын

Hello Patrick Tamellini, narcosis can effect anyone at anytime, specifically below a depth of 60ft. The biggest factor of course, being the partial pressure of nitrogen at depth. Enriched Air Nitrox helps by lowering the partial pressure of Nitrogen, thus lessening the effects of Nitrogen at depth. A person's ability to process the effects of nitrogen will change diver to diver, thus, certain the industry recommends not exceeding those depths until your body has time to adapt to said effects. As far as the depth ratings of 100 and 130, 130 feet is still the recreational max. An easy way to think of this is: 60 feet is the recommend max for new divers, until they have been trained on how to deal with narcosis at depth. 100 feet is the recommend max until your body has had a sufficient amount of time to adapt to narcosis (on a gradual basis). 130 feet is the absolute max for all recreational diving. The basic Open Water Certification from the majority of the major training agencies, certifies you to 130 feet with strong recommendations of the aforementioned depths with training and time. For younger divers, both the industry and insurance companies recommend a max depth of 40 feet due to a child's body not fully being developed. There has also not been a sufficient amount of research on how pressure at those depths effect a child's spinal growth. Hope this clears up the confusion for you. Note: Oxygen Toxicity has a threshold of 1.4 (1.6 for decompression purposes), but is still theoretical at best, as this is the line drawn in the sand and strongly encouraged to never exceed. Since no two humans are identical, there will always have to be a line drawn, as these effects are never guaranteed. Narcosis and Oxygen Toxicity can and does occur, but not always.

@pastrin

Жыл бұрын

@@LakeHickoryScuba thank you Bryan. I love your videos because you are not shy to explain all the details and the maths involved when required. If not done previously, I would be glad to see a video from you regarding how to handle/help a buddy affected by a OxTox seizure. Happy bubbles!

I havent gotten this info from an expert so im not suggesting that its gospel, however ive heard that you cant build up a tolerance to nitrogen narcosis so is that actually true?

@LakeHickoryScuba

Ай бұрын

Great question @aaronborough619. Technically, this is true from a physiological perspective. All divers are suseptiable to Nitrogen Narcosis. An individual's ability to overcome the effects of it can be controlled over time. Someone who consumes alcohol on a daily basis will still become intoxicated, however, they can respond to the effects better than someone who does not drink and simply has too many. Both will be intoxicated based on their blood alcohol content, but one will be able to deal with it better. So a better way of looking at it instead of calling it a tolerence is to say they can adapt to the effects of Nitrogen Narcosis to where it is less noticable physically.

What I don’t understand is how the underwater pressure dictates the pressure of nitrogen in your lungs which is a closed system, is the pressure of the water squeezing hard enough on the ribcage that it compresses a lung capacity of nitrogen? And if so wouldn’t that make it extremely hard to breath? And if so does that mean when you inhale a full lung capacity of nitrogen that you are allowing some pressure of the tank help expand your lungs against the pressure of the water on your ribs by inhaling higher atmospheric pressure nitrogen? Or is the lung not a closed system and the pressure of the ocean slowly saturates your body with oxygen through skin absorption that it partially contributes to the narcosis? There are so many generalized ideas explaining narcosis but no actual explanations of how those generalized ideas come into play and it’s been bugging me for years.

@LakeHickoryScuba

13 күн бұрын

Hello @williamred1, great question. So the first thing we look at is Boyle's Law, which deals with two things. First is pressure and second is volume. Now to keep things simple, volume is referring to the air and not physical tissue which is absorbent. So as we increase pressure as we descend, due to the physical weight of water and its density compared to the atmospheric pressure here at the surface, the nitrogen inside our alveoli compresses to the point that our bodies tissues absorb the nitrogen. Here at sea level this is a non issue as nitrogen is an inert gas. And you are correct, it does become harder to breathe at depth, thus, this is why we prefer a balanced regulator system. Another reason it becomes harder to breathe the deeper we descend is due to the density of a gas, which is a topic for another video. Now as far as narcosis is concerned, all gases are narcotic at higher partial pressures, including oxygen, which becomes more toxic. All of this an more is explained in great depth in the SSI Science of Diving Program and in the SSI Enriched Air Nitrox Program. Once you have completed those two programs, we suggest the SSI Deep Diver Program. the SSI Computer Diving Program, and the SSI Decompression Diving Program. All of these focus more on Decompression Theory, and will explain M-Values and Gradient Factors and how they effect the absorption rate as we descend and ascend.

@williamred1

13 күн бұрын

@@LakeHickoryScuba In order for any external pressure to affect nitrogen in your alveoli it has to have a way to apply itself onto your alveoli, that is what no one is explaining. I understand what happens at depth and how narcosis can happen with even just oxygen but what no one seems to know is how the pressure applies itself to the body. From your explanation and dozens of others I have reached the conclusion that the ocean depth and pressure isn't what causes narcosis but rather our intake of pressurized Nitrogen to counter the ocean pressure that is applied onto the ribcage. It wants to collapse your ribcage area and in return we pressurize the inside of our lungs to allow us to breath and counter the pressure and it is that counter pressure that saturates the alveoli. It is like trying to blow a balloon at atmospheric pressure vs trying to blow up a balloon at 100ft depth under water, it will be more strenuous on your lungs to try and inflate a balloon at such depth and that is exactly what i've come to conclude that is causing narcosis, the amount of internal pressure required to expand the lung not the amount of pressure applied onto your ribcage lung area.

You can’t build up a tolerance to prevent getting “narced”

@LakeHickoryScuba

3 жыл бұрын

Hello Berkeley County South Carolina, technically you are correct, and thank you for pointing that out. The body though, does over time, adapts to the effects of higher partial pressures of Nitrogen, and can even develop a coping mechanism for Nitrogen Narcosis. The more exposure we get, the better we can cope with it’s effects at higher partial pressures. Some divers like myself, never feel the effects with experience. This does not mean that we are not susceptible to Nitrogen Narcosis, it simply means that over time our body’s ability to cope with Nitrogen Narcosis has reached a level, to where we never feel the effects of it. It’s basically like a vaccine. As the body becomes under attack, the antibodies developed from the vaccine defend us from certain deceases, or in this case, our body’s coping mechanism eliminates the effects of Nitrogen Narcosis.

The "best mix" circle doesn't make sense to me. EANX29 and then you have o2 at .34 1.4/.29=(4.82-1)(33or10) is 38.3 meters or 126.3ft Shouldn't the title be EANX34. 100ft/33+1 does = 4.03 which gives you .34 oxygen mix at PPo2 of 1.4....

@DIVETALK

3 жыл бұрын

Exactly...I saw that too. EANX34's MOD is 102. So the best gas at 100 ft is Nitrox 34.

@Jonathanzz49

3 жыл бұрын

@@DIVETALK thanks for the confirmation 👌

@LakeHickoryScuba

3 жыл бұрын

Hello Jonathan Marais, staying conservative on both sides (the oxygen and nitrogen side) is what this video is focused on.

I got narked from a bad reg and it is the best time you'll never remember lol but in all seriousness it's more dangerous than one would think

@LakeHickoryScuba

6 жыл бұрын

Glad to know you made it back safely.

@scubasteveandunderwaterroc3547

6 жыл бұрын

LakeHickoryScuba yes I am very thankful for that but I was only down about 60ft and I was using a retend regulator that wasn't serviced properly

@LakeHickoryScuba

6 жыл бұрын

You have to remember, since we are only dealing with theory, then there is no exact science when it comes to the physiology of the human body. Nitrogen Narcosis can strike at any time, at any depth. Not real sure how an improperly serviced regulator would cause the Narcosis, unless some how, there was a different gas mixture your were using, or in the very unlikelihood chance there was a residual amount of material, such as grease (which should be food grade), inside the regulator, which you were inhaling that caused the Narcosis. Then again, if this is the case, that is another reason we stated that Nitrogen Narcosis should be called Gas Narcosis. When all possible I take my own regulators, I know they have been serviced properly.

@scubasteveandunderwaterroc3547

6 жыл бұрын

LakeHickoryScuba ya I'm very fortunate that nothing bad happened but what I heard is that there wasn't enough air going to my brain or something along those lines but in the end it was making the narked effect

@LakeHickoryScuba

6 жыл бұрын

Lack of Oxygen would definitely cause some type of neurological condition.

Beer in a pink bottle, now I've seen everything.

@LakeHickoryScuba

2 жыл бұрын

Hello Sunny Quinn, you may want to check your computer settings. The bottle shown is actually red.

Omg you can get a tolerance to this only got drunk once and hate it with a passion deep water scares me being drunk scares me f that nope never nope

@LakeHickoryScuba

Жыл бұрын

Hello Anna, you don't really develop a tolerance to Narcosis, as everyone can become narc'ed at depth, but your body can get to the point where it can withstand higher partial pressures of Nitrogen, thus, limiting the chance of narcosis.

@Odettie_Spaghettie

Жыл бұрын

@@LakeHickoryScuba ok that makes sense yea I mainly came to this video cuz of a storyteller KZread Mrballen who had a true horror story on diving and says that thsi was like being very drunk and so my mind naturally was curious lol, still spooky to think of what it can do but yea defiantly makes more sense now had to research it cuz I was so curious lol

I am intolerant to Budweiser since I started drinking whiskey.

@LakeHickoryScuba

3 жыл бұрын

B JH, I have heard this from others.

Underwater equipment sounds like various bongs

@LakeHickoryScuba

3 жыл бұрын

Hello tylermanj, thanks for watching our video and commenting. It means the world to us.

:O

@LakeHickoryScuba

2 жыл бұрын

Glad you liked the video ironmac wade.

Rip yuri lipski

@LakeHickoryScuba

2 жыл бұрын

Hello Jermaine Tyson, just last week, I was teaching a Deep Diver Course, and I showed my student the video of Yuri Lipski, to really drive in why Nitrogen Narcosis is called the "Rapture of the Deep."

Oh god... your accent. Just........ NO.

@LakeHickoryScuba

5 жыл бұрын

Ahh, Bless your heart

@youthecat

5 жыл бұрын

And bless yours multiple times! (We're not as stupid as you look.)

@LakeHickoryScuba

5 жыл бұрын

Well, I’ve definitely been called worse. Happy Diving.

@youthecat

5 жыл бұрын

* I knew you'd eventually see things my way. * I don't dive. Evolution has brought me out of those depths... and into these, I guess. * Don't forget to vote! ;)

@hannahbanana4549

5 жыл бұрын

@@youthecat psychopath