Certified Respiratory Therapist Practice Exam 2025 – Complete Test Prep Guide

Question: 1 / 400

What is the consequence of using a suction catheter that is too large for the ET tube?

Increased suction pressure

Decreased airflow

Potential blockage of the ET tube

Using a suction catheter that is too large for the endotracheal (ET) tube can indeed lead to potential blockage of the ET tube. When the suction catheter's diameter exceeds that of the ET tube, it can create an obstruction within the tube, preventing adequate airflow. This blockage may hinder the passage of air into and out of the patient’s lungs, which is critical for maintaining proper ventilation and oxygenation.

This scenario can elevate the risk of complications, including hypoxia, as the effective air passage is compromised. In clinical practice, selecting the appropriate size for the suction catheter is key to ensuring effective suctioning while safeguarding unobstructed airflow through the ET tube. Therefore, understanding the relationship between catheter size and ET tube diameter is essential for respiratory therapists to prevent potential airway management issues during suctioning procedures.

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Temporary loss of ventilatory support

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