Final answer:
Chest compressions on an adult with a functioning ventricular assist device showing signs of poor perfusion should only be considered after consulting with a healthcare professional experienced with these devices, who will assess and decide on the proper intervention.
Step-by-step explanation:
If an adult with a functioning ventricular assist device presents with signs of poor perfusion, indicated by a mean arterial pressure (MAP) of <50 mmHg and/or a partial pressure of end-tidal CO2 (PETCO2) <20 mmHg, the decision to perform chest compressions is complex. According to advanced cardiovascular life support guidelines, chest compressions would normally be indicated if there is evidence of poor systemic perfusion. However, with patients who have a ventricular assist device, these devices can maintain circulation even when the heart's function is compromised.
Hence, the immediate and correct course of action is to consult with a healthcare professional who is experienced in managing such devices. They can assess the patient's clinical status, device functionality, and consider additional interventions such as adjusting the device settings or providing alternative treatments for improving perfusion and oxygenation before deciding to initiate chest compressions. This professional should be involved urgently, as delay could lead to hypoxia or ischemia, conditions that can cause significant harm to organs such as the brain, which is sensitive to oxygen depletion.