Certified Biomedical Equipment Technician (CBET) Practice Exam 2025 - Free Biomedical Equipment Technician Practice Questions and Study Guide

An active scavenging system is one that employs applied suction to effectively remove exhaust gases from a surgical or procedural area. This system utilizes vacuum pressure generated by a pump to actively draw in and eliminate gases, ensuring a clean environment for both the patient and healthcare personnel.

The active scavenging system's efficiency stems from its design, which includes components such as suction pumps and tubing that facilitate the rapid evacuation of anesthetic gases. This is crucial, as these gases can pose health risks if they accumulate in the operating room or recovery areas.

In contrast, passive scavenging systems rely on natural airflow and diffusion to disperse gases without the use of mechanical suction. This method may not be as effective in rapidly removing harmful gases, especially in high-volume or enclosed environments.

Closed systems refer to configurations where gas is contained, typically in a method that prevents the escape of gases into the atmosphere, but they do not necessarily employ suction to evacuate gases. Open systems, meanwhile, allow for gases to vent freely without the constraints of containing and processing them, which also does not involve applied suction.