The nurse is preparing to inflate a pulmonary artery catheter (PAC) balloon while it is located in the pulmonary artery. What assessment is possible from this action?
1. When inflated, the catheter indirectly measures pressures in the left side of the heart.
2. When inflated, the catheter measures the pressure in the right side of the heart.
3. When inflated, the catheter indirectly measures the cardiac index.
4. When inflated, the catheter measures cardiac output through thermodilution.
1
Rationale 1: Inflating the balloon in the pulmonary artery catheter indirectly measures pressures in the left side of the heart.
Rationale 2: Inflating the balloon in the pulmonary artery catheter measures other pressures.
Rationale 3: The cardiac index is the cardiac output divided by the body surface area.
Rationale 4: Cardiac output is measured though a thermistor within the catheter.
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