Endotracheal intubation can be performed using either direct or indirect laryngoscopy. Direct laryngoscopy involves visualizing the vocal cords and inserting the endotracheal tube under direct visualization. Indirect laryngoscopy involves using a video laryngoscope or other device to visualize the airway indirectly. The choice of technique depends on the patient's anatomy, the urgency of the procedure, and the experience of the clinician. Endotracheal Tube are available in a variety of sizes and materials. The size of the tube is based on the patient's age, gender, height, and weight. The most common sizes used in adults range from 7.0 to 8.5 millimeters in internal diameter. The tube can be made of PVC, silicone, or other materials. PVC tubes are the most commonly used and are relatively inexpensive. Silicone tubes are more expensive but are softer and more flexible, which can reduce the risk of trauma to the airway.
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