Modification of scuba regulator for IPPV.
by
Poulton TJ, Littleton EK, Raudenbush J.

Attention is appropriately being focused on the performance of adequate cardiopulmonary resuscitation in aquatic situations. We modified the second stage (mouthpiece) of a standard scuba regulator to permit intermittent positive pressure ventilation using either a mask or an esophageal obturator airway. Tests demonstrated the inexpensive modification to function adequately for emergency ventilation.

This article is on the MIT (Duke Medical Center) website but the above summary is all I can access.

Anyone know how to get the whole article. This reserch was done in 1985. (Yup! and I thought I had a new idea!!  )

Hi just saw this topic.... and may be able to help. I was just recently reading the DAN o2 Manual and came across some info that may be of use.

Generally MTV's (Manually Triggered Ventilators) require addidional training. The modern day MTV's are designed to only allow a certain amount of pressure to be ventilated to the victim (normally lower than 140psi, which is the pressure regulators flow at in a freeflow situation) So if you were to convert a normal regulator and just use the purge button to provide ventilations you may cause further harm and damage than good. Remember when a vic is not breathing they cant regulate the air flow going in the lungs and may end up "swallowing" most of the air rather than it being directed to the lungs.

The other problem you will have is having an attachment fitted to your regulator to accomodate the pocket mask. Given the extra training that is involved it may be even more complicated than doing a simple mouth to mouth or mouth to pocket mask. Remember in real life situations any help you can provide the victim dosent have to be 100% perfect demonstration quality. So in my opinion it wouldn't be parctical lah unless you fully modify one reg and carry it around with you on every dive.

Hi just saw this topic.... and may be able to help. I was just recently reading the DAN o2 Manual and came across some info that may be of use.

Generally MTV's (Manually Triggered Ventilators) require addidional training. The modern day MTV's are designed to only allow a certain amount of pressure to be ventilated to the victim (normally lower than 140psi, which is the pressure regulators flow at in a freeflow situation) So if you were to convert a normal regulator and just use the purge button to provide ventilations you may cause further harm and damage than good. Remember when a vic is not breathing they cant regulate the air flow going in the lungs and may end up "swallowing" most of the air rather than it being directed to the lungs.

The other problem you will have is having an attachment fitted to your regulator to accomodate the pocket mask. Given the extra training that is involved it may be even more complicated than doing a simple mouth to mouth or mouth to pocket mask. Remember in real life situations any help you can provide the victim dosent have to be 100% perfect demonstration quality. So in my opinion it wouldn't be parctical lah unless you fully modify one reg and carry it around with you on every dive.

I do agree with you, Kiwi Chef.

I was looking more at the Alt Air source having a simple demand/positive pressure switching valve (With the positive pressure setting being a factory pre-set safe pressure suitable for rescue breaths and NOT the "free flow" pressure and flow rate) and a pocket mask that is modified (rather than modifying the regulator) to "click in" and accept a normal regulator mouth piece.

In this way, your primary is still the same, your alt air source is also still the same and you only carry a "modified" pocket mask". The rescue method would be:

Apply pocket mask to victim, turn alt air regulator to positive pressure and "click" onto pocket mask and tow victim to shore or boat.

This is the idea ONLY..... (I'll try to get my engineering team in PETRONAS to work on further details!!!  )

 Hi y'all.

 They call MTV-100.. good course to take( advanced O2).. actually the MTV-100 will increase the O2 flow by 16%. (50% from oronasal  mask) if you're done perfect seal you will get almost 100% O2 to the receiver. Also less tiring to rescuer to delivery the O2.  But MTV also has disadvantage. Has to be 2 rescuer,( older moder mtv also can cause lung damage b'coz the flow rate up to 160lp/m. So get proper MTV, find the latest model only delivery to 40lp/m.

 Safe Diving
 Zaha

Why can't they create a MTV that is fitted with an inflator hose connector? You will have the benefit of MTV (manual demand, regulated airflow, relief valve) plus the ease of connecting to tanks from 21% to 100% O2. 

Cant laa regulators for 100% o2 have to be specially o2 cleaned if used in a 21% situation cant then switch to 100% use, danger of fires can occur.

Quote from: aquaholic on September 09, 2008, 10:21:43 AM

Why can't they create a MTV that is fitted with an inflator hose connector? You will have the benefit of MTV (manual demand, regulated airflow, relief valve) plus the ease of connecting to tanks from 21% to 100% O2. 

Cant laa regulators for 100% o2 have to be specially o2 cleaned if used in a 21% situation cant then switch to 100% use, danger of fires can occur.

Perhaps I should elaborate. The point is to keep it simple. Divers already have at hand O2 cleaned first stages, so if the MTV can be connected via the inflator hose you do not need another separate first stage for the MTV. BTW, a diver's personal kit always has a better chance of being serviced.

Assuming the victim's buddy is using O2 cleaned regs, then he can just fix the MTV to his inflator hose and start AV on the victim. There is no danger of fire because the high pressure first stage is already O2 cleaned. As long as your MTV is O2 cleaned, you can start by using the scuba cylinder containing the highest O2 mix (If you do not have a O2 cleaned reg, then just use the MTV with air).

Just my 2 cents - However, it would appear from this thread chest compressions are more crucial.



 

Hi guys!!

This is just a thought:

In a rescue situation/dive emergency where we have to render "Rescue breathing resusitation", is there a way to use our regulator or air tank?

This is in view that:

1. The air we exhale has less than 21% Oxygen. (12-13%)
2. Providing "mouth to mouth" or "mouth to pocket mask" rescue breaths can be difficult in heavy seas.
3. Effective sealing of the mouth may not be created.
4. Rescue diver being inexperienced may even loose count, forget method, etc.

Is there a regulator/alt air source that can be fitted to a pocket mask and switched to positive pressure mode?

As I said earlier, it's just a thought!       

-pressure on regulator is not the same as the standard DAN o2.
-besides why dont u just use a pocket mask and apply rescue breaths from there on.
-waste of effort constructing a specail kind of pressure what not just because of the salt water
-besides the waste of timeness and the pure stupidity of the article i didnt even care about reading just stick to the normal rescue breaths
-in diving ppl die. decide what you think is necessary.
but dont go and use your "specailized tweaked altreg so you would just so happen to experiment on tricks"
-the chances of using alt reg for other purposes are much more higher than a "dumbgeek lifesaver alt"

the point is..

SALTWATER DONT HURT THE VICTIM only YOU
USE YOUR FINS!

wow, MTV...sounds so deep...what i understand is Music TV     

i watch V channel