New O2 delivery system - input?

[MookieMoose]

If it were high pressure fills I definately would recommend against it.. The higher the pressure the more dangerous oxygen becomes. It becomes more dangerous to fill, more dangerous to use, only only shops with a good booster pump would be able to fill it.. I know I can pump gas high enough to blow up a cylinder but I wouldn't fill oxygen above 3000 psi and usually limit fills to not much more than 2000 psi (the exception being RB divers)

The DOT does allow oxygen at pressures up to 6000 psi, but simply turning on a valve at this pressure could start an oxygen fire.. You definately would require valves that would severely limit the flow of gas since pressurization 0 to say 6000 psi can cause a HUGE rise in temperature, just rising a few hundred psi creates lots of heat.

At this point cleansiness is an absolute must, the cylinders and associated regs would have to be maintained in a sealed state or permanently connected..

High pressure oxygen just say no....
I surface rebreather or larger cylinders are definately a much safer solution..

I understand your concerns. These are all valid concerns, and things we have touhght about. Because I can't really give you much in terms of detail, can we begin with the fundamental assumption that I'm not an idiot? I'm an ex-paramedica and a PhD physiologist. In terms of fil pressures, I'm not talking about extremes of pressure, but higher than the 500-800 psi which is typocal for a Jumbo D cylinder.

With regards to the ease of use of the Oxylator - in reality it is a simple device to operate. It requires less training and less practice than a bag-valve mask, while at the same time providing better and safer ventilation. As an ex-paramedic, I'm aware of how people react to the stress of a medical emergency, and as a diver, I'm aware of the sort of environment where these devices would need to be deployed. Their useability is of paramount concern to me.

The basic point of my original post was to ask other divers if they believe that there would be a market for a system which could deliver a greater supply of O2 from a simple, open-circuit system. I'm not trying to be curt, or defensive, but it's difficult to explain exatly how this is going to work without spilling the beans, so to speak, and I'm not prepared to do that at this point.

Thank you al for your input.

Cam

 

[pufferfish]

I understand your concerns. These are all valid concerns, and things we have touhght about. Because I can't really give you much in terms of detail, can we begin with the fundamental assumption that I'm not an idiot? I'm an ex-paramedica and a PhD physiologist. In terms of fil pressures, I'm not talking about extremes of pressure, but higher than the 500-800 psi which is typocal for a Jumbo D cylinder.

With regards to the ease of use of the Oxylator - in reality it is a simple device to operate. It requires less training and less practice than a bag-valve mask, while at the same time providing better and safer ventilation. As an ex-paramedic, I'm aware of how people react to the stress of a medical emergency, and as a diver, I'm aware of the sort of environment where these devices would need to be deployed. Their useability is of paramount concern to me.

The basic point of my original post was to ask other divers if they believe that there would be a market for a system which could deliver a greater supply of O2 from a simple, open-circuit system. I'm not trying to be curt, or defensive, but it's difficult to explain exatly how this is going to work without spilling the beans, so to speak, and I'm not prepared to do that at this point.

Thank you al for your input.

Cam

I think a Jumbo D cylinder is pressurized to 2200 psi and will flow for about 45 minutes at 15 lpm. It would appear you are looking to extend that range by using a newer high pressure tank. I have seen some of the new smaller composite O2 tanks which are pressurized to 3000 psi.

If you say the tank will be pressurized to higher than 2200 psi this will be a problem getting them filled not only from the danger of handling and filling oxygen tanks at these pressures in a dive shop setting, but the lack of the necessary proper equipment to do so in places like the Carribean or other remote locations. Maintenance and adherence to strict O2 clean conditions is not the rule in these facilities.

One can purchase two Jumbo D's and get 90 minutes and get these filled with relative ease and good safety off the beaten track. I am not sure I would want a 3000 psi O2 cylinder being filled in some remote dive shop by the average tank jockey I see in these places.

My diving medical O2 cylinders are only filled now in medical depots due to concerns about cleanliness of dive facilities. The DOT is looking at these issues currently so you might contact them in this regard.

Good luck with your venture.

 

[derwoodwithasherwood]

Is there any reason why a larger charter boat couldn't carry an oxygen concentrator? There are models out there about the size of an average microwave oven that will deliver 7 - 10 litres per minute at around 90 to 95%. Certainly enough to treat a DCS Px enroute to shore indefinitely.

 

[gazzahawkes]

Hello
Just my two pennys worth,
First off people are often defensive regarding new things especially if it regards tested and proven safety issuses.

Im off the opinion that new change or ideas are always worth investigating.

I work as a manager for several Injured diver evacuation staitions throughout asia.
I know of some drs who are also investigating new systems they are really cool people that i can perhaps forward you onto.

Send a pvt message if you think i can be of help.

keep plugging away sounds interesting.

Kind regards
Gary