Anesthesia Technician Practice Exam

Which factor is critical for minimizing resistance in anesthesia breathing systems?

1. A large bore tubing

2. High pressure setup

3. Multiple valves

4. Low flow rate

The correct answer is: A large bore tubing

A large bore tubing is critical for minimizing resistance in anesthesia breathing systems because it allows for greater airflow and reduces turbulence within the system. When the diameter of the tubing is larger, the cross-sectional area available for gas flow increases, which leads to a decrease in resistance according to Poiseuille's law. This is particularly important in anesthesia to ensure that the patient receives adequate ventilation and oxygenation without putting excessive strain on the respiratory system or mechanical ventilators. In contrast, high pressure setups do not inherently affect the resistance in the tubing; rather, they relate to the delivery of gas. Multiple valves can create additional resistance in a system if not carefully designed; while they may be necessary for regulating flow and ensuring safety, they can hinder the smooth passage of gases if present in excess. Low flow rates increase the time gas spends in the system but do not directly address the physical characteristics of the tubing affecting resistance. Therefore, the size of the tubing plays a crucial role in optimizing airflow and minimizing resistance in anesthesia breathing systems.