Which intervention is used by all levels of EMS providers?

• A. Needle decompression
• B. Multilumen airways
• C. Automated external defibrillator
• D. Automatic transport ventilators

Answer: (C)

The key idea here is that automated external defibrillators are designed for use by responders at every level of EMS, from laypeople to advanced practitioners. AEDs are portable, have clear voice prompts, and automatically analyze the heart rhythm to decide whether a shock is indicated, guiding the user through each step. This accessibility and safety design allows even those with basic training to deliver life-saving defibrillation in suspected cardiac arrest, which is why it’s the intervention used by all EMS levels.

Needle decompression, multilumen airways, and automatic transport ventilators require more advanced training, equipment, and clinical skills. They’re typically within the purview of higher-level EMS providers and not universally used by all levels, whereas the AED is standardized for broad, inclusive use.