"dudekadaktulos"
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Shortest,widest & most fixed part of S.I.Extends- pylorus to duodenojejunal flexure
C shape, Level of umblicus- L1,2,3.
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25 cm long- 5, 7.5, 10, & 2.5 cm.
Mostly retroperitoneal & fixed.
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Relationships of superior partAnteriorly
Quadrate lobe of liver
Gallbladder
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Posteriorly
Commom bile duct
Gastroduodenal a.
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Portal v.Superioely
Omental foramen
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Hepati ArtInferiorly
Head & Neck of pancreas
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Relationships of descending
part
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AnteriorlyLiver, Gall bladder
Transverse colon and
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mesocolonLoops of small intestine
Posteriorly
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Right renal, hilum and ureter
Right renal vessels
IVC , Psoas major
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MediallyHead of pancreas
Common bile duct and
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pancreatic ductLaterally
Right colic flexure
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Relationships of horizontal part
Superiorly
-Head of pancreas, Uncinate pr
Inferiorly
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Loops of small intestine
Anteriorly
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Radix of mesenterySuperior mesenteric a. and v.
Posteriorly
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-Psoas majorRight ureter
Inferior vena cava
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Abdominal aorta ? testi art,
IMA
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Relationships of ascending partRight
Head of pancreas and abdominal aorta
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LeftLeft kidney and ureter
Ant.- Transverse colon
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& meso.,Lesser sac &
stomach
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Post.- Lt. sympatheticchain,Lt. psoas
major,Lt.renal vessels,
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Lt. testicular vessels &
I.M.V.
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Fibromuscular bandwhich suspends &
supports the
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duodenojejunal flexure.
Arises from Rt. Crus of
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the diaphragm- DJFlexure & 3rd ? 4th part
of duodenum.
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Blood supply
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ArteriesSuperior
pancreaticoduodenal a.
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Inferior
pancreaticoduodenal a.
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1st Part- Rt. Gastric a.,supraduodenal a. of
wilkie(hepatic a.)
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Veinsfollow arteries,
draining directly into
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superior mesenteric andhepatic portal veins
Lymphatic Drainage-
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Pancreaticoduodenal nodes
Hepatic nodes
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Coeliac n. & Sup. Mes. Nint. lymph trunk
Cisterna chyli
Nerve Supply-
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Sympathetic- T9 & T10
Parasympathetic-
Vagus- coeliac plexus-
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duodenum along its arteries.