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I'd like to clarify that this was a very unusual occurrence, and that events like this are not the reason behind the recommendations around flying after diving. Any ascent to too high an altitude too soon after diving can result in additional dissolved inert gas being liberated and causing DCS...

You'd be at less risk in an unpressurized cockpit at 3000 feet above sea level than in a commercial airliner, but depending on what type of terrain you're flying over you might end up at a higher altitude. It would be worth clarifying (a) whether that 2500-3000 feet is AGL (above ground level)...

Has it been established what kind of dive medicals are being discussed? In my mind such a thing could range from an attestation of health to a complete dive physical with pulmonary function testing, ECG and a prostate exam. There is precedent for requiring medical exams for certain activities...

@Akimbo Long video, can you provide the TLDR on what it says about hyperbaric oxygen and cancer? Best regards, DDM

Three cheers for Papaws who still jump on trampolines. Sorry this happened. Since recovery from this (and any) surgery can vary from person to person, I strongly recommend that your surgeon be front and center in the conversation. Best regards, DDM

How do you define a dive medical? Best regards, DDM

+1 on what @Scubagermany said. Middle ear inflammation can be extremely slow to resolve. It could be 6-8 weeks before you feel completely normal again. That said, if you go through this every year, a visit to an ENT physician might help address the root cause. Best regards, DDM

I'd recommend you see an ENT physician as soon as practical. Best regards, DDM

Hi @JMarc , You may be thinking of this study, but it only looked at the phase of the menstrual cycle so there's no comparison with male subjects: https://www.researchgate.net/figure/Percentage-of-women-developing-symptoms-of-DCS-during-each-week-of-the-menstrual-cycle_fig2_9007221...

I stand corrected on the source. That said, I don't know that it would be possible to quantify the effect with any accuracy since the quantity of venous gas emboli varies so much from diver to diver, and from dive to dive in the same diver. Best regards, DDM

Point of clarification for readers here based mostly on my own failure to thoroughly read @Deeply Safe Labs ' post #16. The right-to-left shunt described here is different than a right-to-left shunt that allows venous gas emboli to arterialize. This is an important distinction to make. What...

It's good to hear that you're not diving with clogged ears. Concur with @Searcaigh that you should not dive until you can easily equalize. Some people find that nasal sprays containing oxymetazoline can be of temporary benefit. If you choose to do this, ensure that you read the instructions...

There are people who say there are health benefits to cold-water plunges, but since being cold while diving comes with its own set of risks, it would not be advisable to combine the two. Best regards, DDM

Great illustration!! You typically wouldn't find it until it somehow declared itself. Even then it would be a presumptive diagnosis because it's too small to see on imaging. An example might be a diver who experiences a couple of instances of sudden-onset neurological DCS, has a transthoracic...

You may be referring to intrapulmonary shunting in the sense of blood in pulmonary capillaries bypassing non-functioning alveoli - your ARDS example is a good one. I would add that anatomic AV intrapulmonary shunts have been documented in healthy adults as well...

Both of these drugs are immunosuppressants, so you would be at increased risk for infection if you were exposed to a waterborne pathogen. According to the package insert, Zeposia / ozanimod can also lead to a decrease lung vital capacity, though it's not clear why this happens. Best regards, DDM

I think it would depend on the exact system the individual has. If there's air anywhere in the system, in theory that air could expand on ascent and lead to reflux of urine (or salt water if there's been a leak) into a pouch or other internal structure. If your surgeon is aware of the physics...

I think it it is reasonable to assume good intent on the part of the OP and make allowances for English likely being a second language. There are some fine scientific minds on SB, and with that comes the opportunity to share feedback in a constructive manner. Best regards, DDM

First, congratulations on your sobriety. That's an ongoing journey and to have done it for 30 years is admirable. Have you been able to determine a cause for your episodes of vertigo? Have you been seen by a diving physician? Depending on exactly where in Hippydom you are, there may be...

Thanks John. I'm not 100% sure of the question but FWIW, dissolved oxygen does play a significant role in hyperbaric oxygen therapy. This was discussed in this thread. Increasing the inspired partial pressure of O2 will dissolve more O2 into the bloodstream. Breathing nitrox does just that as...