I'm using nasal cannulae to monitor end tidal CO2 prehospital on
spontaneously breathing patients. However trials on my family members show
considerable variation in ETCO2, mainly depending on how much mouth
breathing, as opposed to nasal breathing is going on. This makes me hesitant
to totally rely on the nasal cannulae! Most conscious patients can simply
seal their lips around the sampling connector which I assume gives a more
representative result.
John Apps
GP & Basics
-----Original Message-----
From: [log in to unmask]
[mailto:[log in to unmask]]On Behalf Of LAMBERT MIKE
[RM1] Norfolk and Norwich NHS Trust
Sent: 12 July 2000 20:55
To: 'Gautam'; [log in to unmask]
Subject: RE: Oxygen administration in COPD
This paper may be of interest
Capnography for monitoring non intubated spontaneously breathing patients in
an emergency room setting. Egleston CV, Aslam HB, Lambert MA. J of Acc &
Emerg Med 14:222-224, 1997
Conor showed it could be done with good correlation to PaCO2 and reproduced
the obstructive pattern seen in asthma.
Mike Lambert
A&E Consultant
Norfolk & Norwich Hospital
> -----Original Message-----
> From: Gautam [SMTP:[log in to unmask]]
> Sent: 12 July 2000 20:06
> To: [log in to unmask]
> Subject: Re: Oxygen administration in COPD
>
> In message <[log in to unmask]>, [log in to unmask]
> writes
> >Interestingly, has anyone ever thought of using capnography to monitor
> rise
> >/ fall of CO2 in these patients? It would be less invasive than serial
> ABG's
> How would you do this in spontaneously breathing patient, without
> increasing dead-space, unless you use a posterior nasopharyngeal space
> sampling cath? Sounds like great idea.
>
> Dr G Ray
> Staff Grade
> A&E
> Sussex
> Reply to [log in to unmask]
>
>
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