Anatomy - Thorax Flashcards
(48 cards)
How many cusps does the pulmonary valve have?
3
Vertebral level of pulmonary valve
T6
Where to auscultate each heart valve?
Aorta - 2nd right ICS, parasternal edge
Pulmonary - 2nd left ICS, parasternal edge
Tricuspid - 4th left ICS, parasternal edge
Mitral - 4th left ICS, MCL
Tributaries of azygous vein
‘Right handed people love eating burgers’
Right superior intercostal
Hemiazygous/ accessory hemiazygous
Pericardial
Lower right posterior intercostals
Esophageal
Bronchial
Where do the vagus and phrenic nerves pass in relation to lung hilum
Vagus - posterior, usually more medial
Phrenic - anterior, usually more laterally
Leads + affected artery in inferior MI
Leads: III, aVF,II
Artery - usually RCA
Leads + affected artery in anterior MI
Leads: V1-4, aVR
Artery - LAD/ LCA
Leads + affected artery in lateral MI
Leads: aVL, I, V5-6
Artery: LCx
Where is the lung groove for:
1)azygous vein
2)aorta
1)azygous vein - right lung, post to hilum
2)aorta - left lung, poster/superior to hilum
Surface area of base of lungs
6th rib MCL > 8th MAL > 10th at vertebral column
Vertebral level of 1) carina, 2) lung hilum
Carina - T4
Hilum - T5-7
How many segments does each lung have
10
Nerve supply to intercostal muscles?
Intercostal nerves (ant rami T1-11) + their collaterals
Where is the blockage in subclavian steal syndrome
Proximal to vertebral artery
What is thoracic outlet syndrome
Compression of neuromuscular bundle between scalene medius +Anterior - brachial plexus + subclavian artery
Causes neuromuscular sx in arm
Where to site a chest tube
5th ICS (above lower rib), MAL
Why can chest tube insertion cause bradycardia
Due to irritation of vagus nerve
Where does the phrenic nerve run-in relation to scalene muscles
Anterior to anterior scalene
Contents of middle mediastinum
Heart/ pericardium
Aortic root
Main bronchi
Arch of azygous vein
Contents of anterior mediastinum
Thymus remnants
Lymph nodes
Fat
Contents of superior mediastinum
Nerves: phrenic, vagus + left RLN, splanchnic
Vessels: aortic arch + branches (3), SVC + branches (azygous, brachiocephalic, left up + supreme intercostal)
Organs: oesophagus, trachea, thoracic duct,
Contents of posterior mediastinum
Vessels: aorta, azygous vein
Nerves:vagus, splanchnic, symp trunks
Organs: oesophagus, trachea, thoracic duct, muscles (sternothyroid/hyoid)
How do symp nerves leave the symp chain and go to their organs?
Spinal nerves for plexuses round vessels (cardiac/ pulmonary/ splanchnics)
Boundaries of the mediastinum
Sup + Inf - level of T4/sternal angle
Middle - all pericardium
Ant + post = sternum/ vertebral bodies
Laterally = lung pleura