Final answer:
Ventilation rates should be adjusted based on the PETCO2 value, which should be within the recommended range for a patient who achieves return of spontaneous circulation.
Step-by-step explanation:
When adjusting ventilation rates, the PETCO2 value should be within the recommended range for a patient who achieves return of spontaneous circulation.
PETCO2, which stands for Partial End-Tidal Carbon Dioxide, is a measurement of carbon dioxide levels at the end of exhalation. The normal range for PETCO2 is typically around 35-45 mm Hg.