ET Suctioning Procedure Step-by-Step | Nursing Skills (3D Clinical Guide)

ET Suctioning Procedure Step-by-Step: Clinical Nursing Skills Guide

Endotracheal (ET) Suctioning is a critical clinical skill required for every nursing student and healthcare professional to perform safely and accurately. It is the process of removing excess secretions and mucus from the tracheobronchial tree using a mechanical suction device. The primary goal is to maintain a clear and patent airway, ensuring the patient receives adequate oxygenation while on a mechanical ventilator.

Essential Equipment for ET Suctioning

Before you begin, you must gather your equipment. ET suctioning is a strict sterile procedure to prevent Ventilator-Associated Pneumonia (VAP). You will need:

• A functioning mechanical suction source (wall unit or portable).
• The correct size of sterile suction catheter.
• Sterile gloves and sterile normal saline for flushing.
• Full PPE (Personal Protective Equipment) including mask, goggles, and gown.
• An Ambu bag (Bag Valve Mask) connected to a 100% oxygen source for pre-oxygenation.

Step-by-Step ET Suctioning Procedure

To perform this procedure safely without causing trauma or hypoxia to the patient, follow this standardized clinical protocol:

1. Hand Hygiene and Preparation: Perform thorough hand hygiene and don your full PPE. Put on sterile gloves to handle the sterile suction catheter.
2. Pre-Oxygenation (Hyperoxygenation): This is a crucial safety step. Before inserting the catheter, pre-oxygenate the patient using the Ambu bag or ventilator with 100% oxygen to prevent sudden drops in SpO2 (hypoxia).
3. Catheter Insertion: Carefully insert the suction catheter into the ET tube. Important: Do not apply suction while inserting the catheter. Insert it gently until you feel a slight resistance. This resistance indicates you have reached the carina (the bifurcation of the trachea).
4. The 2-Centimeter Safety Rule: Once you feel resistance at the carina, immediately withdraw the catheter by 2 centimeters. This critical step ensures safety and prevents severe tissue damage and mucosal bleeding.
5. Applying Suction: Apply continuous suction only while slowly withdrawing the catheter. Use a gentle rotating or twisting motion during withdrawal to clear all secretions.
6. Time Limit: Strictly keep the suctioning time to a maximum of 10 to 15 seconds per pass to prevent oxygen deprivation and airway trauma.

Post-Procedure Care and Documentation

After successfully clearing the airway, the procedure must be properly concluded:

• Reconnect to Ventilator: Immediately return the patient to the mechanical ventilator and monitor their vital signs (Heart rate, SpO2) to ensure they are stabilizing.
• Flush Equipment: Use the sterile normal saline to flush the suction tubing and catheter, clearing out the thick secretions.
• Clinical Documentation: Document the entire procedure in the patient's nursing notes. Record the color, consistency, and amount of the secretions, as well as how the patient tolerated the procedure.

How to Choose Catheter Size and Suction Pressure

Correct catheter size is important because a catheter that is too large can block airflow inside the ET tube and worsen hypoxia. As a practical rule, the catheter should not occupy more than half of the internal diameter of the artificial airway. Many ICUs use size charts based on ET tube size to choose the correct French catheter. Suction pressure should also be controlled. Excessive negative pressure can damage tracheal mucosa, cause bleeding, and increase patient discomfort. Adult suction pressure is commonly kept around 100 to 150 mmHg, while pediatric and neonatal patients require lower pressures according to unit policy.

When to Stop Suctioning Immediately

Stop the procedure and reconnect oxygen support if the patient develops severe desaturation, marked bradycardia, new arrhythmia, fresh bleeding, cyanosis, or sudden respiratory distress. These signs suggest the airway or cardiovascular system is not tolerating the procedure. After the patient stabilizes, reassess breath sounds, ventilator readings, secretion load, and the need for another pass. Safe ET suctioning is not about removing every drop of secretion at once; it is about improving airway patency while protecting oxygenation, mucosal integrity, and hemodynamic stability.