The Student Room Group

A way to beat the breathalyser test?

Thought of this strange idea when I was trying to sleep last night, wondering if anyone can confirm it would work or prove it wrong.

Not only does your liver break down the alcohol, but your lungs actually pass alcohol back into the air that you exhale, and this is what the breathalysers measure.

However, if you could master the art of breathing in through your nose, while breathing out through your mouth, like some wind instrument players have to, surely this would be a way to beat the system?

You would breath in clean air through your nose, and breath it straight back into the machine, thus passing the test as the air doesn't enter your lungs.

Anybody who plays instruments where they have to breath in and out at the same time care to shed some light on the situation?

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Or, you could just not drink and drive? I'm far, far from a being a perfect, law-abiding citizen, but I cannot stand drink drivers. It usually takes a tragedy for them to see their error...
Reply 2
A lot of children no longer have a parent, and a lot of parents no longer have a child because of drunk drivers. Anyone caught drinking and driving should have a lifetime ban.
How about you don't drink and drive.

Laws exist for a reason.
Smack
A lot of children no longer have a parent, and a lot of parents no longer have a child because of drunk drivers. Anyone caught drinking and driving should have a lifetime ban.

tbh, all it takes is an extra sip of wine and you're over the limit...theres no actualy definition of how many pints or glasses of what strength wine or beer you're allowed.

and tbh...as above said, just dont drink and drive, duh. even after one pint or glass you're reaction times are affected
I can circular breathe very well, if I want I don't have to breathe when playing my instrument.

However, you've got the idea completely wrong. You don't actually breathe in and out at the same time. You store air in your cheeks and then expel it whilst you take a breath, so there is continuous airflow out of your mouth.

All of the air you breathe out still comes from your lungs. If air came straight in and out 'clean' then it would be pointless wouldn't it, because you'd be getting no oxygen.

So no it wouldn't work. You'd still set the thing off.

Wikipedia describes it better;

The person inhales fully and begins to exhale and blow. When the lungs are nearly empty, the last volume of air is blown into the mouth, and the cheeks are inflated with this air. Then, while still blowing this last bit of air out by allowing the cheeks to deflate, the person must very quickly fill the lungs by inhaling through the nose prior to running out of the air in the mouth. If done correctly, by the time the air in the mouth is nearly exhausted the person can begin to exhale from the lungs once more, ready to repeat the process again.
Reply 6
girlmechanik
tbh, all it takes is an extra sip of wine and you're over the limit...theres no actualy definition of how many pints or glasses of what strength wine or beer you're allowed.

and tbh...as above said, just dont drink and drive, duh. even after one pint or glass you're reaction times are affected


Yes there is.

What is the drink driving limit?

In the UK the drink driving limit is:

35 micrograms of alcohol in 100 millilitres of breath; or
80 milligrams of alcohol per 100 millilitres of blood; or
107 milligrams of alcohol per 100 millilitres of urine.

If you have no perception of how this translates into units then you should not be drinking at all before driving. The law is clearly defined, it is simply proportional to your size.
Im just contemplating wether someone is moronic enough to write the original post or if it has been done to wind everyone up. Either way, drink driving is a completly selfish, stupid and utterly disgusting thing to do, and I have 0 respect for anyone even contemplating the idea.
Reply 8
girlmechanik
tbh, all it takes is an extra sip of wine and you're over the limit...theres no actualy definition of how many pints or glasses of what strength wine or beer you're allowed.

and tbh...as above said, just dont drink and drive, duh. even after one pint or glass you're reaction times are affected


I always wondered about the 'assume' thing in your sig. How does it make an ass of me. Wouldn't it, nearly always, make the assumer a dick?
RyanT
Yes there is.

What is the drink driving limit?

In the UK the drink driving limit is:

35 micrograms of alcohol in 100 millilitres of breath; or
80 milligrams of alcohol per 100 millilitres of blood; or
107 milligrams of alcohol per 100 millilitres of urine.

If you have no perception of how this translates into units then you should not be drinking at all before driving. The law is clearly defined, it is simply proportional to your size.

who actually understand milligrams in blood, urine or breath?
no one i know does, and i wouldnt expect them to.
why doesnt someone just say "you can have one glass of 6% beer" etc
Reply 10
Firstly...no, it wouldn't work, because air you breathe in goes straight to your lungs, it doesn't hover around in your windpipe or the back in your mouth.

Secondly, don't drink and drive. :nothing:
Reply 11
SacreBleu
Thought of this strange idea when I was trying to sleep last night, wondering if anyone can confirm it would work or prove it wrong.

Not only does your liver break down the alcohol, but your lungs actually pass alcohol back into the air that you exhale, and this is what the breathalysers measure.

However, if you could master the art of breathing in through your nose, while breathing out through your mouth, like some wind instrument players have to, surely this would be a way to beat the system?

You would breath in clean air through your nose, and breath it straight back into the machine, thus passing the test as the air doesn't enter your lungs.

Anybody who plays instruments where they have to breath in and out at the same time care to shed some light on the situation?



Don't know why you are getting so much abuse as all you have done is ask a reasonable question.

I really don't think this would work as the air doesn't go straight through and will still pick up alcohol. Serious hyperventilating can reduce the alcohol gas level slightly so it wouldn't surprise me if doing this has an effect but it will be small at best....
Would not work, there are ways to give yourself a little bit of leeway (on the border). Not that I think using them is a good idea.
sebbie
Don't know why you are getting so much abuse as all you have done is ask a reasonable question.

I really don't think this would work as the air doesn't go straight through and will still pick up alcohol. Serious hyperventilating can reduce the alcohol gas level slightly so it wouldn't surprise me if doing this has an effect but it will be small at best....


Exactly it is merely a harmless query based on a wayward assumption. I could ask how a v2 missile works, doesn't mean I'm going to launch one any time soon.
girlmechanik
who actually understand milligrams in blood, urine or breath?
no one i know does, and i wouldnt expect them to.
why doesnt someone just say "you can have one glass of 6% beer" etc

Generally speaking, you can have a maximum of one unit. That's roughly a small glass of wine, half a pint of regular strength beer/cider or a single measure of spirits.
Reply 15
Lol no that wouldn't work. That's not how circular breathing works at all :facepalm2:
Reply 16
Celtic_Anthony
Or, you could just not drink and drive? I'm far, far from a being a perfect, law-abiding citizen, but I cannot stand drink drivers. It usually takes a tragedy for them to see their error...


To quote that NHS advert in Scotland: "What's the matter wi' you? Go on, take a drink..."
L i b
To quote that NHS advert in Scotland: "What's the matter wi' you? Go on, take a drink..."
Nothing's the matter with me- I don't drive!

Anyway, I much prefer the "What'll it be then?" ad. With the genius acting from the barman, involving him playing several different characters in the 20 second slot. Give that man an Oscar.
I hear that eating your underpants works quite well at soaking up the alcohol fumes. :rolleyes:
Celtic_Anthony
Nothing's the matter with me- I don't drive!

Anyway, I much prefer the "What'll it be then?" ad. With the genius acting from the barman, involving him playing several different characters in the 20 second slot. Give that man an Oscar.


:yes:

That's the only government ad I really like :smile: