Anatomy of upper gi
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Transcript of Anatomy of upper gi
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OESOPHAGUSNarrow muscular tube Extent – lower border of cricoid cartilage to
cardiac end of stomach25cmFlattened AntPostlyPharyngo-oesophageal jn
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CurvaturesGenerally vertical2 side to side curvatures(to left)AP curvatures correspond to that of
cervicothoracic spine
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ConstrictionsAt beginning (15cm)Crossed by aortic arch(22.5cm)Left bonchus(27.5cm)On piercing diaphragm(37.5cm)
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BLOOD SUPPLYInf thyroid arteries ---------------
Eosophageal branches of aorta-----------------------------
Oesophageal branches of Left gastric artery ----------------------
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CONTD… VENOUS• upper- brachiocephalic middle- azygos lower- left gastic LYMPHATIC cervical deep cervical Thoracic post mediastinal Abdominal left gastric
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Nerve supplyParasymp upper half - recurrent laryngeal lower half -oesophageal plexus by 2
vagi• Symp upper – middle cervical ganglion lower – upper 4 thoracic ganglia
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STOMACHMuscular bag that forms the widest & most
distensible part of digestive tubeOesophagus to duodenumLocation – epigastric, umbilical & left hypochondriac• 25cm long• Capacity – 1.5 to 2L• Parts
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CONTD…• Lesser curvature- Concave, right border,Lesser omentum• Greater curvature-Convex, left border,greater omentum, gastrosplenic& gastrophrenic ligament• 2 surfaces
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RELATIONS
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ARTERIAL SUPPLY
Venous drainage – portal, superior mesenteric & splenic
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CONTD…Left gastric,
panc-spleniccoeliac&hepatic
rt gastroepi
pyloric
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Nerve supplySymp – T6 to T10Parasymp – from vagi through oesophageal
plexus & gastric nerves
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