SR DEPARTMENT OF ANATOMY JNMCH AMU ALIGARH OESOPHAGUS Narrowest part of GIT except appendix Muscular canal 25 cm 10 in length Three parts Cervical thoracic abdominal COURSE OF OESOPHAGUS ID: 1010193
Download Presentation The PPT/PDF document "OESOPHAGUS DR NOOR US SABA" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
1. OESOPHAGUSDR NOOR US SABASR, DEPARTMENT OF ANATOMYJNMCH, AMU, ALIGARH
2. OESOPHAGUSNarrowest part of GIT, except appendixMuscular canal- 25 cm (10”) in length Three partsCervical, thoracic, abdominal
3. COURSE OF OESOPHAGUSContinuation of pharynx in neckLevel of C6 vertebrae, lower border of cricoidLies in sup & post mediastinumPasses diaphragm at T10 levelEnds- at T11, 2.5 cm Lt to median line, at cardiac orifice of stomach
4. CONSTRICTIONS OF OESOPHAGUSFOUR CONSTRICTIONSOpposite C6- constriction caused by crico-pharyngeus MOpposite T4- crossed by arch of aortaOpposite T6- crossed by Lt bronchusOpposite T10- at oesophageal opening of diaphragm(6”, 9”, 11”, 15” from the incisor teeth respectively)
5. STRUCTURE OF OESOPHAGUSFour coatsFibrous- areolar tissue with mostly elastic fibresMuscular- outer longitudinal, inner circular (upper 1/3rd voluntary, middle 1/3rd mixed, lower 1/3rd involuntary)Submucosa- areolar tissue, glands & plexus of vessels, nerves and lymphaticsMucosa- non keratinized str squamous epithelium
6. ARTERIAL SUPPLY & VENOUS DRAINAGEARTERIAL SUPPLYInf thyroidDescending aortaBronchial ALt gastric ALt inf phrenic AVENOUS DRAINAGEInf thyroid VAzygous and hemiazygous VLt gastric V
7. NERVE SUPPLY AND LYMPHATICSNERVE SUPPLYSYMPATHETIC- T5-T9 segment of spinal cord & oesophageal plexusPARASYMPATHETIC- vagus & recurrent laryngeal NLYMPHATIC DRAINAGEJugulo-omohyoid LNParatracheal LN, tracheobronchial LN, post mediastinal LN
8. CLINICAL APPLICATIONSTracheo-esophageal fistulaEsophagus communicates with tracheaCongenital atresia of esophagusStenosis of lower part of esophagusAchalasia cardiaNeuro-muscular in-coordinationAperistaltic zone in lower part of esophagus