1. Construction: Reinforced endotracheal tubes typically have a layer of reinforcement embedded within the walls of the tube. This reinforcement is often made of materials such as wire or coil.

2. Flexibility: Despite the added reinforcement, these tubes are designed to maintain flexibility to facilitate proper placement in the trachea.

3. Durability: The reinforcement enhances the durability of the tube, making it less susceptible to collapse or obstruction.

4. Resistance to Compression: The reinforcement helps prevent the tube from becoming compressed, ensuring a patent airway.

5. Radiopaque Line: Many reinforced endotracheal tubes include a radiopaque line along their length. This line is visible on X-rays, aiding in the confirmation of proper tube placement.

6. Cuffed or Uncuffed: Reinforced endotracheal tubes may be available in both cuffed and uncuffed variations. Cuffed tubes are equipped with an inflatable cuff to seal the trachea and prevent air leakage.

7. Sizes: Like standard endotracheal tubes, reinforced tubes come in various sizes to accommodate different patient ages and sizes.

These tubes are often used in situations where prolonged intubation is anticipated, such as in critical care settings or certain surgical procedures. The choice of endotracheal tube depends on the specific clinical scenario and patient characteristics.