During adult basic life support (BLS), the recommended compression-to-ventilation ratio for a single rescuer performing CPR is:
- A 15:2
- B 5:1
- C 30:2 ✓
- D Continuous compressions at 100–120/min without ventilation
Correct answer: C. 30:2
Explanation
The 2020 AHA guidelines recommend a compression-to-ventilation ratio of 30:2 for adult CPR when performed by a single rescuer (lay or professional) without an advanced airway in place. This ratio optimizes coronary and cerebral perfusion pressure by minimizing interruptions to chest compressions. Once an advanced airway (ETT or supraglottic device) is secured, continuous compressions at 100–120/min are delivered while ventilations are given at 10 breaths/min asynchronously. The 15:2 ratio is used for two-rescuer infant/child CPR.
Reference: Morgan & Mikhail's Clinical Anesthesiology, 6th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.