An endobronchial blocker (bronchial blocker) is a thin catheter whose cuff is inflated in a main bronchus to close off that lung for one-lung ventilation. It is passed through an existing endotracheal tube or laryngeal mask, which keeps the airway, and works on the left or right side. A double lumen tube is a separate product.
This page is intended for healthcare professionals.
| Size | Model |
|---|---|
| 5.0 | EBN050 |
| 7.0 | EBN070 |
| 9.0 | EBN090 |
Bronchial blocker used through an endotracheal tube or laryngeal mask for one-lung ventilation, left or right; blue silicone cuff, sizes 5.0, 7.0, 9.0.
| Feature | Double and Single Lumen Endobronchial Tube Coming Soon | Double Lumen Endobronchial Tube with Camera Coming Soon | Endobronchial Blocker Coming Soon |
|---|---|---|---|
| How it separates the lungs | Double lumen tubeTwo lumens reach the lungs separately | Camera tubeTwo lumens, with a camera built into the tube | BlockerIts cuff is inflated in a main bronchus to close off that side |
| Checking the position | Double lumen tubeUsually confirmed with a fiberoptic bronchoscope | Camera tubeWatched on the monitor throughout intubation, with an alarm on displacement | BlockerA bronchoscope is usually used for positioning |
| Airway | Double lumen tubeSets up a unilateral or bilateral artificial airway | Camera tubeA double lumen endobronchial tube | BlockerAn existing endotracheal tube or laryngeal mask |
| Sizes | Double lumen tube26 to 41 Fr, nine sizes, left and right | Camera tube26 to 41 Fr, left and right, Type I and Type II | Blocker5.0, 7.0 and 9.0 |
An endobronchial blocker is a thin catheter whose cuff is inflated in a main bronchus to close off that side, so that one-lung ventilation is achieved. It is passed through an existing endotracheal tube or laryngeal mask, which keeps the airway. Physicians call it a bronchial blocker; in purchasing the name endobronchial blocking tube is also used.
The physician chooses for the surgery and the patient's airway. A blocker is considered when the patient is already intubated with a single lumen tube, when a double lumen tube is hard to place, or when ventilation is to continue after surgery without a tube change. A double lumen tube reaches each lung through its own lumen. The summary of comparative studies is on the double lumen tube page.
The blocker comes in three sizes: 5.0, 7.0 and 9.0. It is used with endotracheal tubes and laryngeal masks, on the left or right side. This page does not list which tube inner diameter or patient group each size matches. The physician chooses the size.
A bronchoscope is usually used for positioning. The blocker is advanced through the tube or mask in place, and its cuff is inflated in the target bronchus. The manufacturer states that oxygen, suction and examination can run through the articulated connector at the same time, and that the blue cuff is easier to identify and position. The cuff inflation volume is not given on this page.
If a single lumen tube is in place, it does not need replacing after the blocker is used. When the blocker cuff is deflated and the blocker withdrawn, both lungs are ventilated again through the same tube. The manufacturer states that this is to avoid the damage a second intubation would cause. If the patient needs ventilation after surgery, it can continue through the same tube; the physician decides.
The cuff is soft medical silicone and blue. The body is thin and flexible, with a distal curve that the manufacturer designed to make positioning easier. The manufacturer states that the articulated connector allows oxygen, suction and examination at the same time. The body material, length and packaging are not given on this page.
Arndt and Cohen are brand names that Cook Medical uses for endobronchial blockers, and EZ-Blocker is a brand name of Teleflex. The names belong to their owners; the blocker on this page is not one of these brands. This page does not compare products.
We can share the product documents and the three sizes with their model codes, and answer technical questions about the blocker. Not yet: the endobronchial blocker is not available for order in Türkiye, so this page carries no list price. Write to us with the button on this page for information.
Updated: 10.11.2026
