Probable permanent hearing loss from diving – what to do?

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Hi there,

I would be very grateful if forum members, especially those with a medical background, could give me their opinion on my situation summarised below. I am due to see ENT shortly and would like to be as informed as possible before my appointment. Many thanks in advance!

To summarise, about a month ago (32 days to be precise) I had an accident diving in the Galápagos. On the first dive I had some difficulty equalising (as I often do) but eventually made it down and completed the dive, although in truth I never felt 100% comfortable. On ascent my right ear made a continuous loud squeaky sound, though at no point during either my descent or ascent did I feel any pain. On the surface I noticed I couldn’t hear well with that ear as well as a loud ringing sound, but given in the past I have been prone to mild middle-ear barotraumas as well as getting water stuck in my ear, I didn’t worry too much about it and chose to proceed with the second dive, almost certainly a huge mistake. I also remember feeling quite nauseous but put that down to seasickness, though in retrospect I believe it had something to do with the damage I had just done to my ear. In any case I didn’t have any pain or problems equalising on the second dive.

Back on land the hearing problems and ringing continued, along with a feeling of vertigo/loss of balance which I hadn’t experienced with previous barotraumas. This made me concerned enough to visit a doctor the next day, who while not an ENT was used to dealing with the many divers who visit the Galápagos. He had a quick look at my ear, said it was filled with blood and diagnosed me with a middle ear barotrauma, dismissing my concerns about an inner ear injury by saying that my vertigo would be far worse and I would be vomiting if that were the case. He prescribed me a course of antibiotics, a decongestant and ibuprofen which I took for a week.

While the vertigo/balance issues and ringing went away in a couple of days, my muffled hearing did not improve. However given my aforementioned history with middle-ear barotraumas that eventually resolved themselves, as well advice I read online that barotraumas can take weeks if not months to fully heal, I decided not to worry about it and enjoy my holiday. That was until I began to notice that unlike my previous barotraumas, it wasn’t only muffled hearing that I was suffering from but also a distortion of high-pitched sounds (for example from plastic bags or running water) and difficulty following conversation with the injured ear.

At this point I began feeling seriously worried that I had permanently damaged my hearing, and so after flying back to mainland Ecuador from the islands I went to see an ENT specialist in the capital (Quito) 17 days after the accident (I am traveling for several months across Latin America which is why I am unable to see a specialist back home in the UK). Although he could see no physical problems in my affected ear (after examining it visually and with a device that measures pressure) the audiogram he ran showed high-frequency hearing loss beginning above above 4Khz and worsening steadily beyond that point (hitting 40db at 6k Hz and 70db at 8k Hz). Although he couldn’t identify the cause of the hearing loss, he told me it was likely permanent and caused by the barotrauma. He put me on a course of steroids (Prednisone 60mg daily for a week) despite acknowledging it was probably too late for them to help, and told me to visit another ENT doctor in about 2 weeks time to see if my hearing had improved. Unfortunately I don’t believe the steroids have made a difference to my hearing.

Which brings us to the present. In advance of my appointment on Friday, could you give me your opinion on what you think happened to my ear on my dives and whether there are any emergency measures that could still be taken at this relatively late stage to improve my hearing? The only thing that comes to mind is surgery to repair a perilymph fistula I might have suffered during the dive, but based on my reading it appears to be quite a controversial diagnosis and procedure which I’d have a hard time convincing an ENT to undertake. It also appears far less likely to be helpful if not carried out in the immediate aftermath of the accident. However if it has a chance of saving my hearing then I will push to get it done. Something that also perplexes me is that while I was diagnosed with hearing loss only in the high frequencies, all sounds (not just high-frequency ones) sound slightly muffled through the affected ear, making me wonder if I have some remaining conductive hearing loss caused by fluid that the ENT I saw in Quito was unable to see - is that a possibility?

Any thoughts on the above would be hugely appreciated,

Many thanks,

Max
 
Hi there,

I would be very grateful if forum members, especially those with a medical background, could give me their opinion on my situation summarised below. I am due to see ENT shortly and would like to be as informed as possible before my appointment. Many thanks in advance!

To summarise, about a month ago (32 days to be precise) I had an accident diving in the Galápagos. On the first dive I had some difficulty equalising (as I often do) but eventually made it down and completed the dive, although in truth I never felt 100% comfortable. On ascent my right ear made a continuous loud squeaky sound, though at no point during either my descent or ascent did I feel any pain. On the surface I noticed I couldn’t hear well with that ear as well as a loud ringing sound, but given in the past I have been prone to mild middle-ear barotraumas as well as getting water stuck in my ear, I didn’t worry too much about it and chose to proceed with the second dive, almost certainly a huge mistake. I also remember feeling quite nauseous but put that down to seasickness, though in retrospect I believe it had something to do with the damage I had just done to my ear. In any case I didn’t have any pain or problems equalising on the second dive.

Back on land the hearing problems and ringing continued, along with a feeling of vertigo/loss of balance which I hadn’t experienced with previous barotraumas. This made me concerned enough to visit a doctor the next day, who while not an ENT was used to dealing with the many divers who visit the Galápagos. He had a quick look at my ear, said it was filled with blood and diagnosed me with a middle ear barotrauma, dismissing my concerns about an inner ear injury by saying that my vertigo would be far worse and I would be vomiting if that were the case. He prescribed me a course of antibiotics, a decongestant and ibuprofen which I took for a week.

While the vertigo/balance issues and ringing went away in a couple of days, my muffled hearing did not improve. However given my aforementioned history with middle-ear barotraumas that eventually resolved themselves, as well advice I read online that barotraumas can take weeks if not months to fully heal, I decided not to worry about it and enjoy my holiday. That was until I began to notice that unlike my previous barotraumas, it wasn’t only muffled hearing that I was suffering from but also a distortion of high-pitched sounds (for example from plastic bags or running water) and difficulty following conversation with the injured ear.

At this point I began feeling seriously worried that I had permanently damaged my hearing, and so after flying back to mainland Ecuador from the islands I went to see an ENT specialist in the capital (Quito) 17 days after the accident (I am traveling for several months across Latin America which is why I am unable to see a specialist back home in the UK). Although he could see no physical problems in my affected ear (after examining it visually and with a device that measures pressure) the audiogram he ran showed high-frequency hearing loss beginning above above 4Khz and worsening steadily beyond that point (hitting 40db at 6k Hz and 70db at 8k Hz). Although he couldn’t identify the cause of the hearing loss, he told me it was likely permanent and caused by the barotrauma. He put me on a course of steroids (Prednisone 60mg daily for a week) despite acknowledging it was probably too late for them to help, and told me to visit another ENT doctor in about 2 weeks time to see if my hearing had improved. Unfortunately I don’t believe the steroids have made a difference to my hearing.

Which brings us to the present. In advance of my appointment on Friday, could you give me your opinion on what you think happened to my ear on my dives and whether there are any emergency measures that could still be taken at this relatively late stage to improve my hearing? The only thing that comes to mind is surgery to repair a perilymph fistula I might have suffered during the dive, but based on my reading it appears to be quite a controversial diagnosis and procedure which I’d have a hard time convincing an ENT to undertake. It also appears far less likely to be helpful if not carried out in the immediate aftermath of the accident. However if it has a chance of saving my hearing then I will push to get it done. Something that also perplexes me is that while I was diagnosed with hearing loss only in the high frequencies, all sounds (not just high-frequency ones) sound slightly muffled through the affected ear, making me wonder if I have some remaining conductive hearing loss caused by fluid that the ENT I saw in Quito was unable to see - is that a possibility?

Any thoughts on the above would be hugely appreciated,

Many thanks,

Max

Hi Max,

I don't know that I would dismiss inner ear barotrauma that quickly. It's reassuring that you recovered rapidly from the tinnitus and vertigo; that may mean that if it was IEBT it was either non-fistulating or the fistula was small. As you noted, IEBT can only be definitively diagnosed surgically and I don't think you'd find anyone who would do that this far out, especially since your symptoms have improved significantly since the injury. Re the hearing, the audiogram was done 17 days out, so you don't know what your hearing was immediately after the injury, therefore you don't have an objective measure as to whether it's getting better. Serial audiograms would be more informative.

Barotrauma can also cause ossicular chain disruption (disarticulation of the three delicate bones in the middle ear: malleus (hammer), incus (anvil), and stapes (stirrup). I think this is unlikely in your case absent a distinct mechanical insult but I'll tag @doctormike here for his opinion on that. Mike, this is speculation of course, but for my own info, could that result in high-frequency hearing loss, and does it take more than just barotrauma like the OP described to cause it?

Best regards,
DDM
 
Yes, I agree with DDM about what to do now...

Can you post your audiogram? That would help sort out the difference between a conductive hearing loss related to fluid or ossicular injury, and a sensorineural hearing loss related to inner ear injury.

If your dropoff is limited to above 4 kHz that's actually a pretty good result, often people end up with worse hearing in the speech frequencies (500-2000 Hz), which is more of a quality of life issue. If the hearing loss was a pure sensorineural hearing loss, then ossicular injury wouldn't be the problem. I haven't seen ossicular injury from diving related barotrauma (admittedly I don't see many of these patients), usually that's from direct trauma like a Q-tip injury.

Some types of IEBT don't even show up at surgical exploration - unless there is a significant fistula, you wouldn't see much and surgery wouldn't help if the problem was a pressure gradient with barotrauma across the round or oval windows.

Bottom line is that while you are unlikely to find an intervention at this point which would improve your hearing, it's worthwhile having a formal evaluation and workup (including a CT scan) to see if there is an anatomic problem (like a superior canal dehiscence or fistula), and to help you decide about your diving future....

Sorry I can't be more helpful! Hope you make a full recovery...

Mike
 
Dear Mike and DDM,

Thank you so much for your very helpful responses. Looks like I'll just have to try and get used to the hearing loss, while still remaining hopeful of further recovery. To be honest I think I've been put off diving for good by this experience...

Attached is a photo of the audiogram I had 17 days after the accident – I'm having another one on Friday which I will also share. Any thoughts you have on these would be greatly appreciated.

Cheers,

Max
 

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Hard to tell since the audiogram isn't complete, but it does look like an isolated high frequency sensorineural hearing loss. There is some information missing that would confirm that.

You don't mention what your profile was, and to me the whole things sounds more like IEBT associated with MEBT. One last thought, though... I think that Inner ear DCS is often overlooked, as the inner ear seems to be more sensitive to decompression stress than other tissues. Not clear if this is due to bubble formation in the inner ear, or embolization of bubbles into the inner ear end vessels due to some right to left shunt (like a PFO, which statistically speaking, a quarter of us reading this thread have, even if we don't know it). Have seen this with relatively "benign" profiles.

In any case, feel free to keep us posted, and I hope that you have a full recovery!
 
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