Hi Roxan...As for zeroing a-line, or swan-ganz or just a cvp - the stopcock is
closed toward the patient...the port is then uncovered and then zeroed - the
pigtail on the transducer will prevent any saline from ejecting. After the
monitor reads "zeroed at......", a new cap is placed on the port after making
sure there is saline at the top of the port (want no air in the line). The
stopcock toggle is then put "off" to the port. The pigtail is then pulled up and
dropped immediately to check for damping on the wave form.....When the pigtail
is pulled and let go, there should be two or so waves immediately when pulled
and they should quickly go from large wave to small. The line is then zeroed.

Roxan Temaat <rtemaatemict@...> wrote:The stopcock is positioned off to
the patient, remove the cap and
'zero' it on the monitor.

Roxan
EMICT, RN

--- dinoda@... wrote:

> Hello Nurse Bob, I have a question regarding the position of the
> stopcock when zeroing an A-line. I read your description on
> transducer/line set up and use however I am not sure which way the
> stopcock should be positioned. Should the stopcock be open to all
> three ports, pressure bag, to air and patient or closed to one of the
> three (not closed to air obviously and with the "end cap" removed)
> when I use the "zero" function on my monitor? Your information is
> greatly appreciated, Thank you, Dino D'Angelo, Paramedic/RN.



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