Should I be worried???

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Time_Bandit

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Whilst on holiday I decided to do my Deep Diving Speciality. The following incident occurred.

I will give you the dive profile to help illustrate.....

1st Dive was to 130ft for 9 minutes (brings me to Pressure Group G)

Surface Interval 3.00hrs (Bringing me back to Pressure Group A)

2nd Dive was to 100ft for 18 minutes.

Now here is my concern.....

a) Using my RDP going to 40m (approx 130ft) gives me maximum of 9 minutes. This was fine. I then had a 3 hour SI and then dived to 100ft (approx 30m). Now using my RDP when I flip over to use table three my Residual Nitrogen is 3 and my Maximum bottom time is 17 minutes. As you can see I spent 18 minutes at 100ft (although not all 18 minutes were actually at 100ft.....probably more time spent at roughly 90ft!)

b) That I did two deep dives in one day (According to my RDP I should limit all repetitive dives to max of 30m (approx 100ft)

We only just about did our three minute safety stop. The thought of an EIGHT minute stop didn't even come into the Instructors mind!!!

When we got back on to the boat we had to wait for other divers (who hadn't gone so deep) for 10-15 minutes. Whilst waiting, the water (and therefore the boat) was very rough. It really made my head start spinning. My head was spinning for most of the evening and for a short period the next day!

Unless you are a Doctor I guess you wont make any sort of Diagnosis.....but I was slightly concerned that it may have been DCS.

I guess my question is, given the above Dive Profile....should I be worried about the fact that I went 1 minute over my limit without doing an 8 minute decompression (and the fact I did 2 deep dives in one day)???

By the way....I am 31, reasonably fit male!

Thanks in advance.
 
OK...I'm not a doctor but I would be more inclined to assume either sea-sickness or a pressure imbalance in the ears to explain the dizziness.

As a precaution you can call DAN. Your profiles are not extreme but still pushing the boundaries a bit.

How do you feel right now?

R..
 
When in doubt, call DAN. I did.
 
Not being a doctor, I know nothing. But I agree, it sounds like the Freeky Ear to me. Calling DAN is good (I did, too).

One thing you should know how to do is the 5 Minute Neurological Exam:
5 Minute Neurological Exam by Scott Landon

1. Orientation - Does the diver know name and age? Location? What time, day, or year it is? Note: Even though a diver appears alert, the answers to these questions may reveal confusion, so do not omit them.

2. Eyes - Have the diver count the number of fingers you display using two or three different numbers. Check each eye separately and then together. Have the diver identify a distant object. Tell the diver to hold head still, or you gently hold it still, while placing your other hand about 18" in front of the face. Ask the diver to follow your hand with his eyes. Move your hand up, down, side to side. The divers eyes should smoothly follow your hand and should not jerk to one side and return. Check that pupils are equal in size. Note: Often AGE victims have different dilation in one eye then another. Also look for nystagmus (fluttering of the eyes either vertically or horizontally). This is a sign of neurological problems with the vertical fluttering being associated with more severe damage.

3. Face - Ask the diver to whistle. Look carefully to see that both sides of the face have the same expression while whistling. Ask the diver to grit the teeth. Feel the jaw muscles to confirm that they are contracted equally. Instruct the diver to close the eyes while you lightly touch your fingertips across the forehead and face to be sure sensation is present and the same everywhere.

4. Hearing - Can be evaluated by holding your hand about two feet from the diver's ear and rubbing your thumb and finger together. Check both ears, moving your hand closer until the diver hears it. Check several times and confirm with your own hearing. If the surroundings are noisy (i.e. a crowded beach), the test is difficult to evaluate. Ask bystanders to be quiet and turn off unneeded machinery.

5. Swallowing reflex - Instruct the diver to swallow while you watch the Adam's apple to be sure that it moves up and down.

6. Tongue - Instruct the diver to stick out the tongue. It should come out straight in the middle of the mouth without deviating to either side.

7. Muscle Strength - Instruct the diver to shrug the shoulders while you bear down on them to observe for equal muscle strength. Check the diver's arms by bringing the elbows up level with the shoulders, hands level with the arms, and touching the chest. Instruct the diver to resist while you pull the arms away, push them back, up and down. The strength should be approximately equal in both arms in each direction. Check leg strength by having the diver lie flat and raise and lower the legs while you gently resist the movement.

8. Sensory Perception - Check on both sides by touching as done on the face. Start at the top of the body and compare sides while moving downwards to cover the entire body. The diver's eyes should be closed during this procedure. The diver should confirm the sensation in each area before you move to another area.

9. Balance and coordination - Be prepared to protect the diver from injury when performing this test. Have the diver stand up with feet together, close eyes and stretch out arms. The diver should be able to maintain balance if the platform is stable. Your arms should be around, but not touching the diver. Be prepared to catch the diver who starts to fall. Note: If the diver is already messed up you may want to avoid this one if he can't even stand. Check coordination by having the diver move an index finger back and forth rapidly between the divers nose and your finger held approximately 18" from the diver's face. Instruct the diver to slide the heel of one foot down the shin of the other leg. The diver should be lying down when attempting this test. Check these tests on both right and left sides and observe carefully for unusual clumsiness on either side.
by Scott Landon

1. Orientation - Does the diver know name and age? Location? What time, day, or year it is? Note: Even though a diver appears alert, the answers to these questions may reveal confusion, so do not omit them.

2. Eyes - Have the diver count the number of fingers you display using two or three different numbers. Check each eye separately and then together. Have the diver identify a distant object. Tell the diver to hold head still, or you gently hold it still, while placing your other hand about 18" in front of the face. Ask the diver to follow your hand with his eyes. Move your hand up, down, side to side. The divers eyes should smoothly follow your hand and should not jerk to one side and return. Check that pupils are equal in size. Note: Often AGE victims have different dilation in one eye then another. Also look for nystagmus (fluttering of the eyes either vertically or horizontally). This is a sign of neurological problems with the vertical fluttering being associated with more severe damage.

3. Face - Ask the diver to whistle. Look carefully to see that both sides of the face have the same expression while whistling. Ask the diver to grit the teeth. Feel the jaw muscles to confirm that they are contracted equally. Instruct the diver to close the eyes while you lightly touch your fingertips across the forehead and face to be sure sensation is present and the same everywhere.

4. Hearing - Can be evaluated by holding your hand about two feet from the diver's ear and rubbing your thumb and finger together. Check both ears, moving your hand closer until the diver hears it. Check several times and confirm with your own hearing. If the surroundings are noisy (i.e. a crowded beach), the test is difficult to evaluate. Ask bystanders to be quiet and turn off unneeded machinery.

5. Swallowing reflex - Instruct the diver to swallow while you watch the Adam's apple to be sure that it moves up and down.

6. Tongue - Instruct the diver to stick out the tongue. It should come out straight in the middle of the mouth without deviating to either side.

7. Muscle Strength - Instruct the diver to shrug the shoulders while you bear down on them to observe for equal muscle strength. Check the diver's arms by bringing the elbows up level with the shoulders, hands level with the arms, and touching the chest. Instruct the diver to resist while you pull the arms away, push them back, up and down. The strength should be approximately equal in both arms in each direction. Check leg strength by having the diver lie flat and raise and lower the legs while you gently resist the movement.

8. Sensory Perception - Check on both sides by touching as done on the face. Start at the top of the body and compare sides while moving downwards to cover the entire body. The diver's eyes should be closed during this procedure. The diver should confirm the sensation in each area before you move to another area.

9. Balance and coordination - Be prepared to protect the diver from injury when performing this test. Have the diver stand up with feet together, close eyes and stretch out arms. The diver should be able to maintain balance if the platform is stable. Your arms should be around, but not touching the diver. Be prepared to catch the diver who starts to fall. Note: If the diver is already messed up you may want to avoid this one if he can't even stand. Check coordination by having the diver move an index finger back and forth rapidly between the divers nose and your finger held approximately 18" from the diver's face. Instruct the diver to slide the heel of one foot down the shin of the other leg. The diver should be lying down when attempting this test. Check these tests on both right and left sides and observe carefully for unusual clumsiness on either side.
 
Regardless of diving tables, it is entirely possible that you "took a hit" - Call DAN (if you're a member) that's what they're there for.

My wife called DAN for a tingling sensation she felt in her fingers. DAN was very helpful, and called 3 times after that to follow up to see how she was.

Don't hesitate, or post it here... call DAN first thing!

They'll tell you if you should be worried. If you're ok now though... then you're ok.
 
There's nothing like being safe. I had numbness in both hands after a dive and after speaking with guys at DAN realized it started at depth and was prabably the tight sleeves of my shorty wetsuit.

I would also suggest you get a dive computer to log your exact depths and time. You don't have to spend a fortune to get one that will show you your dive profile minute by minute.

Cheers
 
I agree with the computer suggestion and it does sound more like an ear problem than DCS (but I'm not a doctor nor do I play one on television). Call DAN. I don't think his profiles are very aggressive, but it appears they are square? I don't like deep drops without spending time in the shallows. Progressively shallow in the shape of a gentle upward curve. I often do 2 deep dives in one day, but never in a square profile. I am older than you. Doing 2 deep dives in one day is not necessarily a recipe for DCS.

Were you all diving tables? Or was the instructor diving a computer?

If you do use a computer, you can follow it without feeling pressured to exit with your instructor because I think even the most hard-headed ones understand the need to clear your computer before surfacing.
 
Time_Bandit,

I'd like to make this a bit of an academic discussion for a moment.

Ultimately, you are responsible for your safety. Not your dive buddy, not your DM. You.

If you believe an ascent is too fast to be safe, slow your ascent.
If you believe that you need a longer safety stop, then take it. It doesn't matter whether the DM limits his stop. You should do what will ensure YOUR safety.

And then there is your dive computer...
Don't get me wrong. I dive with a computer. However, your dive computer provides THEORITICAL numbers based on depths and times. It does not measure your actual Nitrogen load.
Do not think while you are within the boundries of your computer that you are somehow protected from a DCS hit.

In my opinion, every diver should have a solid understanding of decompression theory.

Dive safe. Dive Conservatively. Don't rely on other divers to keep you out of the chamber.
 
As others have said you can dive within the limits of the tables or a computer and still take a hit. When in doubt do call DAN.

Just a clarification. Are you talking about 9 minutes and 18 minutes of bottom time or are you referring to total dive time? Remember that bottom time is measured from your initial decent to the time you leave the bottom for your final ascent to the surface. How did you time the dives?

Oh… also consider that on dive 2 you have a multilevel aspect to the dive… and so the tables (but not the wheel) will be conservative.

For the future in deep diving you also need to consider the shape of your ascent… slower the better and not just the classic 3 minutes at 15 feet. Consider learning about deep stops and pauses as you ascend.
 
Regardless of diving tables, it is entirely possible that you "took a hit" - Call DAN (if you're a member) that's what they're there for.
You don't have to be a member to call. They have Dive Doctors 24/7 who will talk to anyone. They might ask if you're a member, but the first time I called them - they didn't ask until the end of the chat. Other times, they never asked.

So, be prudent and call them - if you have them available where you are? You don't give you location, but I take it you are not in the US? If DAN is not available there, call a local dive medicine resource.

What you have posted so far sounds like limit pushing, and I bet you were only sea sick, but play it safe.

BTW, I'm 58 and will readily do 2 deep dives in a day - but prefer Nitrox, wear two computers, do deep stops plus safety stops and slow ascents.
 

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