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Hi everyone! On 7th November I suffered a nasty diving accident at Stoney Cove (A flooded quarry in the UK used for training). In fact I nearly died but thanks to the efforts of the paramedics, the medical team and the prayers of all my friends, includiing fellow scubaboarders, I am very much...

On a thread concerning potential incidents of DCI it became apparent that, in the US at least, oxygen is considered a medicine and may only be "administered" on the surface by suitably qualified individuals for treatment of medical emergencies. [/B]In the field or recreational diving this leads...

There has been a lot of discussion on the risk/benefit analysis of Nitrox on this forum of late. Most divers "graduate" to using Nitrox but I wonder if its benefits should be introduced as a part of basic open water training? The mathematical concepts are not too difficult to grasp and the...

Hi Dr Deco, In a discussion on technical diving I learned that many divers believe that keeping a high(ish) ppO2 constant can actually reduce the efficiency of decompression because it is thought that on long exposures it can narrow the capillaries and so reduce offgassing at the level of the...

Hi Dr Deco, Could you explain, in simple terms, the concept of "M" values and how they are derived? I gather it is related to the degree a tissue can retain gas in supersaturated solution, after the external pressure is reduced, before it comes out of solution within the tissues, or...

The idea from this thread came from the thread started by barb on good equipment. We have all bought items of kit we later regret but often our pride prevents us from admitting it. In my case I admit it was an all singing, all dancing digital compass, which turned out to be an abject...

My Dear Uncle, Are you my paternal Uncle? (Dad was from Pennsylvania!). Great posts! (Sorry, I know I take myself far too seriously sometimes). Took a look at your little video on the use of a spool and the dry-suit inflator to fill your lift bag or DSMB. How do you do this? Do you...

I recently downloaded the simularor software for the HS Explorer to have a look at what it can do and It very much like what I have seen so far as it appears very flexible and user friendly. However it is clearly a sophisticated instrument and not suitable for the inexperienced diver. Perhaps it...

Dr Deco, As usual I have a poser! It is along time since I did any basic physiology but have been unsuccesful in finding the answers to the following basic questions and admit to simply wanting to save myself a lot more wasted time in the medical library of my nearest city. Do you have...

This is a quote from the BSAC site. "A year ago I was treated for DCI . I developed symptoms 30 hours after diving - (my buddy developed symptoms within in 45 minutes). I decided to take a year out from diving and within that year my medical has expired. I would like to start diving again but...

Hi all, I have just joined the group and have a real poser for you. I am trying to get my head around the Oxygen CNS clock. While I can understand that whole body toxicity is time dependent, from my reading it seems that CNS Oxygen toxicity, in theory at least, is dependent only the...