mainstem bronchus

mainstem bronchus

Either of two (right and left) bronchi which continue from the trachea and in turn give rise to lobar (secondary) bronchi.
References in periodicals archive ?
Beyond it, the mainstem bronchus was found to be of normal caliber (figure, A).
An esophagram was subsequently performed, and demonstrated a fistulous connection between the esophagus and the left mainstem bronchus (Figures 1 and 2).
The EB balloon was then advanced a further 2 cm so it would slide into the right mainstem bronchus.
Hilar nodes: Nodes immediately adjacent to the mainstem bronchus and hilar vessels including the proximal portions of the pulmonary veins and main pulmonary artery
Bronchoscopy showed purulent secretions in the left mainstem bronchus, complete obstruction of the bronchus, and frothy secretions in the right airways.
3) The usual affected sites are three points of anatomic narrowing: the cricopharynx, the crossing of the left mainstem bronchus or aortic arch, and the gastroesophageal junction.
Bronchoscopy demonstrated a large black and gray plaque in the left mainstem bronchus (Figure 2) and multiple smaller gray and black deposits in the left upper lobe, left lower lobe, and right lower lobe.
About 75% of cases occur in those under age 3 years, and most aspirated items are found in the right mainstem bronchus.
The right mainstem bronchus courses posteriorly and superiorly to the right pulmonary artery (epaterial), while the left mainstem bronchus courses laterally and inferiorly in relation to the left pulmonary artery (hyparterial).
With the patient under general anesthesia, direct laryngoscopy and bronchoscopy revealed that an insect had become lodged in the right mainstem bronchus, just distal to the carina (figure, A).
The second method involves a single-lumen endotracheal tube with an endobronchial blocker (bronchial blocker) to occlude the mainstem bronchus on the operative side (1).