esophagus anatomy

Question 1

fwhats laimer’s triangle

Answer 1

on the dorsal esophagus just distal to the cricopharyngeus muscle only covered with circular muscle

Question 2

whats killians triangle

Answer 2

area of weakness proximal to the cricopharyngeus muscle

Question 3

esophagus has a ___ blood supply

Answer 3

segmental, inferior thyroid to the cervical, bronchial 1 right and 2 left for the thoracic and left gastric and inferior phrenic arteries to the abdominal esophagus

Question 4

where are the arterial collaterals in the esophagus

Answer 4

within the muscle and submucosa

Question 5

venous drainage is segmental

Answer 5

submucosa into a periesophageal venous plexus, inferior thyroid vein into the cervical, bronchial azigous, and hemiazygous in the thoracic. coronary vein into portal system in the abdomen

Question 6

lymphatic drainage in the esophagus is segmental

Answer 6

false, are intramural and longitudinal. in theory proximal into cervical nodes, middle into superior and posterior mediastinal nodes and distal into gastric and celiac nodes

Question 7

vagal nerve input into the esophagus

Answer 7

RLN feeds the criopharyngeus and cervical esophagus (aspiration and dysmotility), midesophagus directly from vagus, distal esophagus from vagus after it enters the abdomen

Question 8

UES is at

Answer 8

15 cm

Question 9

Left mainstem bronchus and aortic arch

Answer 9

25 cm

Question 10

LES

Answer 10

38-40 cm

Question 11

primary waves

Answer 11

swallowing

Question 12

secondary waves

Answer 12

housekeeping

Question 13

tertiary waves

Answer 13

occasional with swallowing, increased with dysmotility syndromes