Portable and mounted suction units must generate a vacuum of at least ____ when the tubing is clamped.

Portable and mounted suction units must generate a vacuum of at least ____ when the tubing is clamped.

• A. 50 mmHg
• B. 100 mmHg
• C. 300 mmHg
• D. 600 mmHg

Answer: (C)

The key idea is that an EMS suction device must provide enough negative pressure to pull secretions from the airway even when the tubing is obstructed. The minimum vacuum you look for is 300 mmHg. That level is high enough to overcome airway resistance and reliably suction thick fluids, which is essential in emergency airway management. Values like 50 or 100 mmHg would be too weak to clear secretions, making suction ineffective. While some units can generate higher vacuums (for example up to 600 mmHg), the standard requirement is at least 300 mmHg when the tubing is clamped.

The key idea is that an EMS suction device must provide enough negative pressure to pull secretions from the airway even when the tubing is obstructed. The minimum vacuum you look for is 300 mmHg. That level is high enough to overcome airway resistance and reliably suction thick fluids, which is essential in emergency airway management. Values like 50 or 100 mmHg would be too weak to clear secretions, making suction ineffective. While some units can generate higher vacuums (for example up to 600 mmHg), the standard requirement is at least 300 mmHg when the tubing is clamped.