While checking an indwelling central venous pressure (CVP) catheter the respiratory therapist observes that the transducer is at the epistatic line. The respiratory therapist should do which of the following at this time?
a. Zero the pressure transducer.
b. Raise the pressure transducer.
c. Accept the CVP reading obtained.
d. Recalibrate the pressure transducer.
ANS: C
The epistatic line is located at the mid-thoracic line. The central venous pressure (CVP) transduc-er needs to be placed at this line to accurately measure CVP. The epistatic line is located about 5 cm behind the angle of Louis. This is the place where the transducer must be zero-balanced. Since the transducer is at the epistatic line in this question the pressure measured will be accurate and should be accepted.
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