大體老師 無語良師 大體解剖學實驗 HUMAN DISSECTION PERITONEUM & PERITONEAL CAVITY 盧家鋒 助理教授 臺北醫學大學醫學系 解剖學暨細胞生物學科 臺北醫學大學醫學院 轉譯影像研究中心 http://www.ym.edu.tw/~cflu REFERENCES • Dissector‘s guide • [1] Dissection Guide for Gray's Human Anatomy, 2ed, 2006 • [2] Grant’s Dissector, 15ed, 2012 • Photographic Dissector • [3] Gray's Clinical Photographic Dissector of the Human Body, 2013 • Human Atlas • [4] Gray's Atlas of Anatomy, 2ed, 2014 • [5] Grant's Atlas of Anatomy 13ed, 2012 • [6] Color Atlas of Anatomy: A Photographic Study of the Human Body, 7ed, 2011 • [7] Atlas of Human Anatomy, 6ed, 2014 http://www.ym.edu.tw/~cflu 2 ABDOMEN (2/3) • Peritoneum & Peritoneal Cavity • Removal of Gastrointestinal (GI) Tract http://www.ym.edu.tw/~cflu 3 REVIEW http://www.ym.edu.tw/~cflu 4 PERITONEUM & PERITONEAL CAVITY 腹膜和腹膜腔 http://www.ym.edu.tw/~cflu 5 ABDOMINAL VISCERA 四象限位置 http://www.ym.edu.tw/~cflu Ref. [3], p. 176 Mallatt, Human Anatomy 8ed, 2017, p. 717 PERITONEUM • Peritoneal cavity is lined by peritoneum. • Serous membranes that secrete a small amount fluid to lubricate the movements of organs. • Peritoneum • Parietal peritoneum • Visceral peritoneum http://www.ym.edu.tw/~cflu Mallatt, Human Anatomy 8ed, 2017, p. 715 7 INTRAPERITONEAL (PERITONEAL) ORGANS • • • • • • • • Stomach 胃 First part of duodenum 十二指腸 Jejunum 空腸 Ileum 迴腸 Transverse colon 橫結腸 Sigmoid colon 乙狀結腸 Liver 肝臟 Spleen 脾臟 http://www.ym.edu.tw/~cflu 8 RETROPERITONEAL (EXTRAPERITONEAL) ORGANS Primary Secondary • Kidneys 腎臟 • Duodenum (2nd through 4th parts) • Ureters 輸尿管 • Pancreas 胰臟 • Suprarenal glands 腎上腺 • Ascending colon 升結腸 • Rectum 直腸 • Descending colon 降結腸 http://www.ym.edu.tw/~cflu 9 小網膜 上隱窩 PERITONEUM 小網膜囊 T12 L1 橫結腸繫膜 L2 L3 下隱窩 大網膜囊 腹腔動脈幹 腸繫膜 上動脈 L4 L5 小腸繫膜 大網膜 http://www.ym.edu.tw/~cflu 10 PERITONEUM Inferior mesenteric artery 腸繫膜下動脈 at L3 level Ref. [5], p. 126 http://www.ym.edu.tw/~cflu 11 GREATER OMENTUM 大網膜 • The greater omentum is attached to the greater curvature of the stomach. • Includes • Gastrophrenic ligament • Gastrosplenic ligament Gastrophrenic ligament Gastrocolic ligament • Gastrocolic ligament Ref. [5], p. 123 http://www.ym.edu.tw/~cflu 12 Greater omentum (Apron portion) GREATER OMENTUM 大網膜 Transverse colon Transverse mesocolon • Reflect the greater omentum superiorly over the costal margin. Jejunum ileum Ref. [6], p. 306 http://www.ym.edu.tw/~cflu 13 LESSER OMENTUM 小網膜 2. 1. • The lesser omentum passes from the lesser curvature of the stomach and first part of the duodenum to the inferior surface of the liver. • 1. Hepatogastric ligament 胃肝韌帶 Ref. [6], p. 311 • 2. Hepatoduodenal ligament 肝十二指腸韌帶 http://www.ym.edu.tw/~cflu 14 GREATER AND LESSER OMENTUM http://www.ym.edu.tw/~cflu Ref. [5], p. 123 15 Coronary ligament LIVER Right lobe THE LARGEST GLAND IN BODY (2.5% OF BODY WEIGHT OF AN ADULT) Falciform ligament • Connects to parietal peritoneum of anterior abdominal wall • Falciform ligament • Connects to diaphragm • Coronary ligament Left lobe Round ligament of liver (remnant of umbilical vein) Bare area Right triangular ligament Left triangular ligament • Left triangular ligament • Right triangular ligament Coronary ligament Bare area http://www.ym.edu.tw/~cflu 16 Ref. [5], p. 150 Coronary ligament Falciform ligament OMENTAL FORAMEN & BURSA Omental foramen 網膜孔 Remove the anterior surface of the hepatoduodenal ligament http://www.ym.edu.tw/~cflu 17 Ref. [7], p. 311 CONTENTS OF HEPATODUODENAL LIGAMENT • Common bile duct 總膽管 • Hepatic artery proper 肝固有動脈 • Hepatic portal vein 肝門靜脈 • Autonomic nerves 自主神經 • Lymphatic vessels 淋巴管 http://www.ym.edu.tw/~cflu can be removed to clear the dissection field. 18 CONTENTS OF HEPATODUODENAL LIGAMENT 右肝動脈 右肝管 左肝管 左肝動脈 膽囊動脈 總肝管 肝門靜脈 膽囊管 肝固有動脈 膽管 http://www.ym.edu.tw/~cflu Ref. [5], p. 134 19 總肝動脈 BRANCHING PATTERNS OF CYSTIC ARTERY • The cystic artery may pass posterior (75%) or anterior (24%) to the common hepatic duct. http://www.ym.edu.tw/~cflu 20 HEPATIC PORTAL VEIN • delivers approximately 75% of the liver's blood supply. • The superior mesenteric vein and the splenic vein join to form the hepatic portal vein posterior to the neck of the pancreas. Ref. [5], p. 164 http://www.ym.edu.tw/~cflu 21 DETACH LIVER FROM DIAPHRAGM Caudate lobe • Use scissors to cut the falciform, coronary, and triangular ligaments. • Use scissors to cut the inferior vena cava between the liver and the diaphragm. Porta hepatis Left lobe Right lobe • Elevate the inferior border of the liver and cut the inferior vena cava again as close to the inferior surface of the liver as possible. Quadrate lobe http://www.ym.edu.tw/~cflu An H‐shaped set of fissures and fossae 22 GALLBLADDER • Use blunt dissection to remove the gallbladder from its fossa. • Use scissors to make a longitudinal cut through the wall of the gallbladder, beginning at the fundus and continuing through the neck and into the cystic duct. http://www.ym.edu.tw/~cflu 23 STOMACH • • • • • • • • Body Greater curvature Lesser curvature Cardia Cardia notch Fundus Angular incisure/notch Pyloric part & pylorus http://www.ym.edu.tw/~cflu 24 BLOOD SUPPLY OF STOMACH within lesser omentum within greater omentum Ref. [5], p. 134 http://www.ym.edu.tw/~cflu 25 Lesser omentum has been removed. Left gastric artery Splenic artery Common hepatic artery Right gastric artery Gastroduodenal artery Right gastro‐omental artery Ref. [6], p. 314 http://www.ym.edu.tw/~cflu 26 INTERNAL FEATURES • Use scissors to open the stomach along its anterior surface. • Extend the cut into the first part of the duodenum. • Rinse the mucosa and observe the internal features. http://www.ym.edu.tw/~cflu 27 9 SPLEEN 10 • the largest hematopoietic organ in the body. • The visceral surface of the spleen is related to four organs: 11 Ref. [5], p. 136 • Stomach • Left kidney • Transverse colon (left colic flexure) • Pancreas 28 DUODENUM Intraperitoneal 腹膜內 • Superior 1st part • At L1 vertebral level Retroperitoneal 腹膜後 • Descending 2nd part • At L2 vertebral level • Horizontal 3rd part • At L3 vertebral level • Ascending 4th part • At L2 vertebral level 29 Ref. [5], p. 137 PANCREAS Located against vertebral bodies L1 to L3. A. Uncinate process B. Head C D Inferior vena cava lies posterior to it. C. Neck D. Body B E A Abdominal aorta lies posterior to it. E. Tail http://www.ym.edu.tw/~cflu 30 Use blunt dissection to clean the Pancreas Stomach (turned up) Ref. [6], p. 317 http://www.ym.edu.tw/~cflu 31 Liver (left lobe) WARNING ! Stomach has been removed. Duodenum (opened) Common bile duct 32 Ref. [5], p. 161 Ref. [6], p. 318 Superior mesenteric artery T12 SMALL INTESTINE & SUPERIOR MESENTERIC ARTERY • Dudenum, jejunum, ileum • The superior mesenteric artery then enters the mesentery. Within the mesentery, into the right lower quadrant, toward the terminal end of the ileum. L1 L2 L3 腹腔動脈幹 腸繫膜 上動脈 L4 L5 • Intestinal arteries are 15 to 18 arteries to the jejunum and the ileum. http://www.ym.edu.tw/~cflu 33 Move small intestine to the left. Greater omentum (relected) Use blunt dissection to clean the branches of the superior mesenteric artery Transverse colon Transverse mesocolon Middle colic artery Duodenojejunal junction Superior mesenteric artery and vein Right colic artery Jejunal artery Jejunum ileal arteries ileocolic artery Mesentric lymph Nodes and vessels Note the dense autonomic nerve network surrounding the blood vessels. This is the superior mesenteric plexus of nerves. Remove the nerve fibers as necessary to clean the vessels. Cecum Ref. [6], p. 309 34 COMPARISON OF INTESTINAL ARTERIES Two‐fifths of the small intestine http://www.ym.edu.tw/~cflu Three‐fifths of the small intestine 35 INFERIOR MESENTERIC ARTERY • The inferior mesenteric artery arises from the anterior surface of the abdominal aorta at the L3 vertebral level. http://www.ym.edu.tw/~cflu 36 Move small intestine to the right. Transverse colon Use blunt dissection to clean the branches of the inferior mesenteric artery Transverse mesocolon Abdominal aorta Left colic artery Inferior mesenteric artery Duodenojejunal junction Inferior mesenteric vein Superior hypogastric plexus Superior rectal artery Sigmoid arteries Right common iliac artery ileum Sigmoid mesocolon Ref. [6], p. 308 http://www.ym.edu.tw/~cflu Sigmoid colon 37 LARGE INTESTINE Six parts • Cecum • The appendix is attached to the inferior end of the cecum. • • • • • Ascending colon Transverse colon Descending colon Sigmoid colon rectum http://www.ym.edu.tw/~cflu Three features • Teniae coli 結腸帶 • Haustra 結腸袋 • Omental appendices (epiploic appendages) 腸脂垂 Haustra 38 COMPARISONS OF FOLDS C. Distal ileum A. Proximal jejunum D A B. Proximal ileum D. Transverse colon B C http://www.ym.edu.tw/~cflu Ref. [5], p. 149‐150 39 REMOVAL OF GASTROINTESTINAL (GI) TRACT 胃腸道移除 http://www.ym.edu.tw/~cflu 40 REMOVAL STEP 1/9 Caudate lobe • Use scissors to cut the falciform, coronary, and triangular ligaments. • Use scissors to cut the inferior vena cava between the liver and the diaphragm. Porta hepatis Left lobe Right lobe • Elevate the inferior border of the liver and cut the inferior vena cava again as close to the inferior surface of the liver as possible. Quadrate lobe http://www.ym.edu.tw/~cflu An H‐shaped set of fissures and fossae 41 REMOVAL STEP 2/9 • Inferior to the diaphragm, tie one string around the esophagus (black line). • Cut the esophagus superior to the string (dashed line). • Cut the vagus nerve trunks at the same level. http://www.ym.edu.tw/~cflu Stomach 42 REMOVAL STEP 3/9 • Use scissors to cut the suspensory ligament of the duodenum (十二指腸 懸吊韌帶) close to the duodenojejunal junction. http://www.ym.edu.tw/~cflu 43 REMOVAL STEP 4/9 Stomach (turned up) • Free the stomach from any peritoneal attachments it may still have to the posterior abdominal wall. • Insert your fingers posterior to the spleen and carefully free the splenic vessels, tail of the pancreas, and body of the pancreas from the posterior abdominal wall. • Free the duodenum and the head of the pancreas from the posterior abdominal wall. http://www.ym.edu.tw/~cflu 44 Celiac trunk REMOVAL STEP 5/9 • Use scissors to cut the celiac trunk close to the aorta, leaving no stump (殘根). • Use scissors to cut the superior mesenteric artery near the aorta, leaving a 1‐cm stump. • Use scissors to cut the inferior mesenteric artery near the aorta, leaving a 1‐cm stump. Superior mesenteric a. Inferior mesenteric a. • 提示：將所有器官往右側翻，由右側剪血管。 http://www.ym.edu.tw/~cflu 45 REMOVAL STEP 6/9 • Use scissors to cut the parietal peritoneum lateral to the ascending colon. • Use your fingers to free the ascending colon from the posterior abdominal wall. • Roll the ascending colon toward the midline and use your fingers to loosen its blood vessels from the posterior abdominal wall. http://www.ym.edu.tw/~cflu 46 REMOVAL STEP 7/9 • Cut the parietal peritoneum lateral to the descending colon. • Use your fingers to free the descending colon from the posterior abdominal wall. • Roll the descending colon toward the midline and use your fingers to loosen its blood vessels from the posterior abdominal wall. http://www.ym.edu.tw/~cflu 47 REMOVAL STEP 8/9 • Tie two strings 4 cm apart around the distal end of the sigmoid colon, close to the rectum (black lines). • Use scissors to cut the sigmoid colon between the strings (dashed line). • Cut the superior rectal artery. http://www.ym.edu.tw/~cflu 48 REMOVAL STEP 9/9 • The gastrointestinal tract, liver, pancreas, and spleen should now be free of attachments. Remove them from the abdominal cavity. • Support the liver and be careful not to twist or tear the structures in the hepatoduodenal ligament. http://www.ym.edu.tw/~cflu 49 NOTES • 各組取出的腹部內臟，請”整套”放置在一塊大紗布上，移置後方空的解 剖台做解剖觀察。 • 無法使用空解剖台的組別，可將紗布放置在2~3托盤上，在後方空的大木 桌上觀察。 • 下課前，請同樣將腹部內臟以紗布包裹，放置於橘色儲存桶中浸泡。 • 使用的解剖台與大木桌，請清理乾淨方能離開。 http://www.ym.edu.tw/~cflu 50 THE END [email protected] (TMU EXT. 3273) http://www.ym.edu.tw/~cflu 51
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