Trachea and Bronchi Dr.Hassan Shaibah

Tracheobronchial anatomy*Tracheal Displacement Due to Goiter

Images downloaded from From www.vh.org

a mobile cartilaginous and membranous tube

Right bronchsWiderShorter

C6T4/5Left bronchusNarrowerLongerMore horizontal

C shaped rings of hyaline cartilagesFree Posteriorly. Cartilages are connected by a muscle 11.25 cmTrachealisMuscle

LTMain bronchusRTMain bronchusLTUpper lobarbronchusLTlower lobarbronchus

RTlower lobarbronchus

RTUpper lobarbronchusRTmiddle lobarbronchusCricoid Cartilage

Main carina: Concepts of anterior and posterior

RTSegmantal bronchiLTSegmantal bronchi

Relations of the Trachea

At Level of superior MediastinumAnteriorly: The sternum, thymus, left brachio-cephalic v., origins of the brachiocephalic and left common carotid a., & arch of the aorta

Posteriorly: esophagus & left recurrentlaryngeal n.

Right side: azygos v., right vagus n., & the pleura

Left side: arch of the aorta, left common carotid &left subclavian a., the left vagus & left phrenic n., & the pleura.

sternum thymusLT brachiocephalic v.Brachiocephalic truckLT common carotid a. Anterior the level of T1

Posteriorly at level of T1esophagusLTRecurrent laryngeal N

Right at level of T1RT vagus n.Pleura

Left at level of T1PleuraLT common carotid aLT subclavian a.left vagus n. LT phrenic n.

The sternumthymusLT brachiocephalic v.BrachiocephalicTrunkLT common carotid a.

The sternumthymusLT brachiocephalic v.BrachiocephalicTrunkLT common carotid a. anterior

Left at level of T1PleuraLT common carotid aLT subclavian a.left vagus n. LT phrenic n.

RightRT vagus n.Pleura

sternumthymusArch of aortaAnterior at level of T4

Left at level of T1PleuraArch of aorta left vagus n. LT phrenic n.

Right at level of T1RT vagus n.PleuraAzygos v.

Posterior at level of T4

At level T4

At level T3

At Level of the neckAnterior: thyroid gland, inf. Thyroid vein with some neck musclesPosterior : right and left recurrent laryngeal nerveLateral: lobes of the thyroid gland and carotid sheath

thyroid glandinf. Thyroid vein

Posteriorright and left recurrent laryngeal nerve

LateralLobes of the thyroid gland & carotid sheath

*Intraluminal disease and extrinsic compressionTumor invading through posterior wall.Tumor invading left and right main bronchiNarrowing of lower third of trachea

BI, All Rights Reserved, 2005*Tracheal appearances

BI, All Rights Reserved, 2005

Nerve Supply of the Tracheasensory nerve supply is from the vagi and the recurrent laryngeal nerves. Sympathetic nerves supply the trachealis muscle

Blood Supply of the Tracheaupper 2/3 are supplied by the inferior thyroid arteries lower 1/3 is supplied by the bronchial arteries.