A pulmonary artery catheter must be wedged in which of the following locations?
a. Zone 1
b. Zone 2
c. Zone 3
d. Doesn't matter
ANS: C
To be accurate, the pulmonary artery catheter must be wedged in zone 3 of the lungs. In zone 3 there is a continuous column of blood between the catheter tip and the left atrium. In zones 1 and 2, the pulmonary vessels may be partly or completely compressed by adjacent pulmonary alveolar pressures.
Health Professions
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