anatomy of pancreas
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Anatomy of Pancreas. Objectives. Identify location of the Pancreas Recognize important anatomical relations to the pancreas Identify different parts of the pancreas Recognize main and accessory pancreatic ducts Identify blood supply of the pancreas - PowerPoint PPT PresentationTRANSCRIPT
Anatomy of Pancreas
Objectives Identify location of the Pancreas Recognize important anatomical relations
to the pancreas Identify different parts of the pancreas Recognize main and accessory pancreatic
ducts Identify blood supply of the pancreas Discuss lymphatic drainage, and nerve
supply of the pancreas
Pancreas Pancreas is an elongated accessory
digestive gland It is a retro peritoneal organ that lies
transversely crossing the bodies of L1-L2 vertebra “ trans pyloric plane”
It is both an endocrine and exocrine organ
Location: Retro-peritoneum, 2nd lumbar vertebral level
Has an oblique, transverse position Parts of pancreas: head, neck, body and
tail
Anatomical relations & Parts
Parts:BodyHead, Neck,TailUncinate process
Head of Pancreas Includes uncinate process Flattened, 2 – 3 cm thick Right border: related to the 2nd and
3rd portions of duodenum Superior Pancreatico Duodenal
Artery(SPDA) and Inferior Pancreatico Duodenal Artery (IPDA) anastamose between the rt. lateral border & the duodenum
Neck of Pancreas 2.5 cm in length Straddles SMV and PV Superior border relates to the pylorus Superior mesenteric vessels emerge from
the inferior border Posteriorly, SMV and splenic vein
confluence to form portal vein Posteriorly, most often no branches to
pancreas
Parts of Pancreas
Body of Pancreas Elongated, long structure Anterior surface, separated from
stomach by lesser sac Posterior surface, related to aorta,
Lt. adrenal gland, Lt. renal vessels and upper 1/3rd of Lt. kidney
Splenic vein runs embedded in the post. surface closer to the superior border
Inferior surface is covered by transverse mesocolon
Posterior relations
Tail of Pancreas
Narrow, short segment Lies at the level of the 12th thoracic
vertebra Ends within the splenic hilum Lies in the splenophrenic ligament Anteriorly, related to splenic flexure
of colon May be injured during splenectomy
(fistula)
Pancreatic Duct Main duct (Wirsung) runs the entire length of
pancreas Joins CBD at the ampulla of Vater
Arterial Supply of Pancreas
Variety of major arterial sources (Celiac, SMA and Splenic)
Celiac Common Hepatic Artery Gastroduodenal Artery Superior pancreaticoduodenal artery which divides into anterior and posterior branches
SMA Inferior pancreaticoduodenal artery which divides into anterior and posterior branches
Arterial Supply of Pancreas
Venous Drainage of Pancreas
Follows arterial supply Ultimately, into portal vein
Lymphatic Drainage
Rich periacinar network that drain into 5 nodal groups Superior nodes Anterior nodes Inferior nodes Posterior PD nodes Splenic nodes
Innervation of Pancreas Sympathetic fibers from the
splanchnic nerves Parasympathetic fibers from the
vagus
Innervation of Pancreas
Rich afferent sensory fiber network Ganglionectomy or celiac ganglion
blockade interrupt these somatic fibers (pancreatic pain)
However the origin of pancreatic pain is difficult to explain anatomically
Recommended readings Keith L. Moore Clinically Oriented
Anatomy Sixth edition pages 265-268
Refeneces Keith L. Moore Clinically Oriented
Anatomy Sixth edition pages 265-268 www.medicalstudent.com www.netteranatomy.com http://www.bartleby.com/107/