Posts with the category “dive-safety-faq”

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Diving and regular exercise
April 11th, 2018
Some runners run every day regardless of other activities. The first recommendation for such people is that they dive very conservatively. This advice is by itself a problem since it is difficult to q...  Read More
by DAN Medical Team
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Physiology of Decompresssion sickness FAQ
April 10th, 2018
DCS does not typically present with isolated swelling in a small joint such as a finger or toe. As in above-water activities, fingers are susceptible to a wide range of mechanical injuries in diving....  Read More
by DAN Medical Team
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Post Decompression sickness
April 9th, 2018
It is possible that residual sensitivity arising from the decompression insult is responsible for the subsequent symptoms....  Read More
by DAN Medical Team
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Oxygen ears FAQ
April 6th, 2018
Also known as middle-ear oxygen absorption syndrome, oxygen ear describes a gas volume imbalance in the middle ear after diving with breathing gas that has a higher oxygen fraction than air. The pheno...  Read More
by DAN Medical Team
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Inert gas washout FAQ
April 6th, 2018
The deeper and longer the dive, the more gas accumulates. In cases of DCS, the inert gas load exceeds the tissues’ capacity, so bubbles form....  Read More
by DAN Medical Team
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Dive with orbital Implant FAQ
April 6th, 2018
DAN medics and researchers answer your questions about dive medicine.I lost one of my eyes in an accident. I have an opportunity to learn how to scuba dive, but I have heard that I would not be allowe...  Read More
by DAN Medical Team
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Flying after pool diving FAQ
April 6th, 2018
Flying or travel to altitude after diving is a consideration for many divers...  Read More
by DAN Medical Team
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Diving after Bariatric surgery FAQ
April 6th, 2018
DAN offers medical information and resources to allow the individual, and their medical doctor or surgeon, to make the most informed decision about diving-safety. There are a few factors to consider w...  Read More
by DAN Medical Team
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Marine injuries FAQ
April 6th, 2018
Good medical practice benefits tremendously from mutual trust and good communication. Let the doctor examine you and ask questions, and trust him or her — no dive-specific medical knowledge is needed ...  Read More
by DAN Medical Team
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Lung squeeze while freediving FAQ
April 6th, 2018
Immersion pulmonary edema (IPE), is a multifactorial condition, largely a net effect of increased central blood volume, pressures within the chest and, for compressed-gas divers, increased breathing...  Read More
by DAN Medical Team
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Vasovagal Syncope unpredictable FAQ
April 6th, 2018
Vasovagal syncope are brought on by basic Valsalvamanoeuvres. These are very common in diving, as they are used to equalise pressure in the middle ear during descent to depths as shallow at 5-10 feet...  Read More
by DAN Medical Team
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Incident report procedure FAQ
April 6th, 2018
DAN medical information specialists and researchers answer your questions about dive medicine.I would like to report an incident for your statistical database and other uses. Do you have a standard me...  Read More
by DAN Medical Team
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Diving when in Remission
April 6th, 2018
It’s important that all divers be free from any distracting or disabling symptoms. Second, it is important that you and your physician confirm that you are not only in good health but also have good ...  Read More
by DAN Medical Team
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Diving after knee surgery FAQ
April 6th, 2018
After successful arthroscopic knee surgery the most important thing is allowing an adequate period to heal and completing rehabilitation before returning to diving....  Read More
by DAN Medical Team
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Nasal Decongestants FAQ
September 7th, 2017
​I'm a beginner diver, and I have difficulty equalizing my ears. I have heard that I shouldn't dive if I use nasal decongestants, but is it safe to dive if I use nasal steroids? It is very common for ...  Read More
by Ryan Courtney
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Stapedectomy FAQ
September 7th, 2017
​I recently had a stapedectomy. Can I dive? What are the risks? ​Ear, nose and throat (ENT) surgeons trained in dive medicine differ in their opinions regarding the wisdom of diving after a stapedecto...  Read More
by Ryan Courtney
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DCS Effects FAQ
September 7th, 2017
​Why do the effects of decompression sickness (DCS) last longer than the 12 to 18 hours it takes to offgas? Do the bubbles that cause DCS lead to other problems in the body that last longer? If that's...  Read More
by Ryan Courtney
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AED Safety FAQ
September 7th, 2017
​While checking out the safety gear available on a dive boat, I noticed an automated external defibrillator (AED) among the first-aid equipment. Is it safe to use an AED around water? How about on a m...  Read More
by Ryan Courtney
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Pulmonary Stenosis FAQ
September 7th, 2017
​I am 48 years old and have moderate hypertension. I was diagnosed with pulmonary stenosis, which was surgically corrected. The pulmonary valve, however, is allowing some blood to leak, permitting bac...  Read More
by Ryan Courtney
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Back Pain FAQ
September 7th, 2017
​I have a student who has a neurostimulator for back pain. What exactly is a neurostimulator, and are there any implications for diving? Neurostimulators are surgically implanted devices that have som...  Read More
by Ryan Courtney
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Dental Implants FAQ
September 7th, 2017
​I'm going to see an oral surgeon next week for dental implants; will I ever be able to dive again? A dental implant is a titanium post or frame that's surgically placed in the jawbone. An implant rep...  Read More
by Ryan Courtney
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Cold Sore FAQ
June 23rd, 2017
​What do I need to know about diving with a cold sore? Here are a few issues you should consider: Risk of further injury: Sun exposure or mechanical trauma from the mask and/or regulator may worsen t...  Read More
by Ryan Courtney
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Abdomen Pain FAQ
June 23rd, 2017
​I have been diving for 15 years without problems, but on my last couple of trips I experienced pain in my upper left abdomen under my ribs about 15-30 minutes into a dive. It becomes increasingly pai...  Read More
by Ryan Courtney
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Sunburn FAQ
June 23rd, 2017
​Lately I feel like I'm getting sunburned much more easily than I used to. I am taking a new medication; is there any chance that could be the cause? ​Sunshine is a welcome addition to just about any ...  Read More
by Ryan Courtney
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Medication FAQ
June 23rd, 2017
​My wife and I love to travel to exotic destinations, and my previous doctor used to give me antibiotics in case I got sick in a remote location. I have a new primary care physician who is hesitant to...  Read More
by Ryan Courtney
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Scuba diving & freediving on the same day FAQ
June 23rd, 2017
​What is the current thinking regarding scuba diving and freediving on the same day? ​Shallow, low-intensity freediving before scuba diving creates only mild concern. The stress of repeated middle-ear...  Read More
by Ryan Courtney
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Chamber FAQ
June 23rd, 2017
​Could you send me information about hyperbaric chambers in the area where I'll be diving next weekend? ​In general, DAN® does not provide domestic chamber information to the recreational diving publi...  Read More
by Ryan Courtney
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Arterial Gas Embolism
June 23rd, 2017
​I understand that arterial gas embolism (AGE) can manifest like a stroke, with facial droop and cognitive problems. It makes sense that bubbles in the brain could cause such serious symptoms, but I h...  Read More
by Ryan Courtney
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Micronuclei FAQ
April 10th, 2017
In a recent DAN article about exercise and diving, I read the following: Intense physical activity — generally with substantial muscular forces and joint loading (the application of forces on joints)...  Read More
by Ryan Courtney
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Motion Sickness FAQ
April 10th, 2017
​I recently returned home from a two-week liveaboard dive trip. After experiencing some initial motion sickness while adapting to the motion of the boat, I had a wonderful trip. At the end of the trip...  Read More
by Ryan Courtney
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Health Concerns FAQ
April 10th, 2017
​Why does it seem like the answers I read in Alert Diver are so conservative? You advise caution for medical issues I would never give a second thought to when participating in other activities such a...  Read More
by Ryan Courtney
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Nitrogen FAQ
April 10th, 2017
​I know nitrogen is not metabolized by the body, and I've read that tech divers are facing issues with helium bends. Is the size of the molecules relevant? Helium molecules are smaller and lighter tha...  Read More
by Ryan Courtney
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Elderly Divers FAQ
April 10th, 2017
​I am 79 years old and healthy. I have not been diving in several years and would like to get back into it. Are there any recommendations, prohibitions or limitations for a diver my age? ​Please note ...  Read More
by Ryan Courtney
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Eye Surgery FAQ
April 10th, 2017
​I underwent a type of eye surgery called a trabeculectomy last year, and I wonder whether this has any implications for scuba diving. ​Trabeculectomy, a surgical procedure commonly used to treat glau...  Read More
by Ryan Courtney
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Fluid in the Ear FAQ
April 10th, 2017
​I've occasionally had problems clearing my ears, particularly my right ear, and I take medication for allergies and nasal congestion. A couple of months ago I got a sinus infection, and in the weeks ...  Read More
by Ryan Courtney
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Anticoagulant Medication FAQ
April 10th, 2017
Recently my doctor took me off warfarin and prescribed a newer anticoagulant, dabigatran. Are there any concerns regarding scuba diving while taking this medication? ​This is a great question and one ...  Read More
by Ryan Courtney
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Hydration FAQ
April 10th, 2017
​If 1.5 gallons of water is considered too much to drink (From the Medical Line, Fall 2014), what is your recommendation? Would it not depend on the environment and activity? When I worked as a river ...  Read More
by Ryan Courtney
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Jet Lag FAQ
April 10th, 2017
​My next dive trip is taking me across the world. Whenever I cross time zones, I suffer relatively severe jet lag, which affects my ability to dive safely. What might I do to minimize the effects of j...  Read More
by Ryan Courtney
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Hyperbaric Chamber FAQ
April 10th, 2017
​I have heard that it's not uncommon for hyperbaric chambers — even ones that treat divers — to refuse to receive certain patients. Why is this? ​We are aware of this issue, which we recently discusse...  Read More
by Ryan Courtney
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COPD FAQ
April 10th, 2017
​My doctor recently diagnosed me with mild COPD. Can I still dive with this condition? What are the risks? ​Chronic obstructive pulmonary disease (COPD), also known as chronic obstructive lung disease...  Read More
by Ryan Courtney

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