A CVP line measures the pressure in the right atrium and normal is 0 to 4cm H20. Because there are no valves prior to the RA you can use the SVC to obtain an indirect measurement of RA pressure, however pressure in the SVC is a little higher, ranging 4 to 11cm. The cordis is probably in the jugular or Subclavian and I would imagine this would be too distant from the Right atrium to give you an accurate reading, however it might be useful to watch the trend in the pressure reading.
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]On Behalf Of Michael Drafz
Sent: Monday, October 09, 2006 11:01 PM
To: Mary M. Maskell Amirault; [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]; Cofield, Louise; [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: Re: questionI would say that it depends on the tip position of the Cordis.A lot of times it does not even reach the SVC, so is it a "true" CVP?It seems logical that the more you get away form the SVC, the less accurate it will be? Now, if the difference is clinically significant is another story. Anyone knows about studies done on this?It is probably a lot easier to transduce via cordis due to its size, you have a better intraluminal fluid column, so your waveform might be better.Michael Drafz
"Mary M. Maskell Amirault" <[EMAIL PROTECTED]> wrote:
Does anyone have the answer about using a subclavian cordis introducer
for monitoring CVP's? Is the lumen size what determises the validity or
the length and position/ Our trauma attending feels it is more
accurate. Thanks
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Michael Drafz RN, OCN, CRNIClinical Lead Vascular Access ServiceSharp Memorial Hospital Metropolitan CampusSan Diego, California
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