Pathophysiology of Irregular Attachment of the Duodenocolic Ligament in Dog and Cat

• Main Authors: Ching, Shih-I, 經士毅
• Other Authors: Chien, Chi-Hsien
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/92159728675971528232

碩士 === 國立屏東科技大學 === 獸醫學系所 === 102 === Irregular duodenocolic ligament connection could lead to vovulus or obstruction. Studies describing duodenocolic ligament are rare. We observed thirteen cases that present chronic vomit or intestinal hypoperistalsis. Irregular membrane connection between duodenum and colon was found in all cases by laparotomy. All patients eased from clinic signs after the incision of this connection by surgery. These results implied that abnormal membrane connection may be a possible cause for unknown vomiting or hypoperistalsis. Purpose of this study is to investigate the connections of duodenocolic ligament and explore the relationships between structural abnormality and clinical signs. 120 cadavers from animal shelter were dissected and confirmed that this irregular mesentery is one of the different patterns of duodenocolic ligament. Type I describes the membrane linkage from the anti-mesentery border of duodenum to the mesentery of descending colon (mDC). Type I-a is a single triangle membrane (17.5%, 21/120). Type I-b has two or more triangle membranes (25%, 30/120). Type I-c is a rectangle but not triangle membrane (1.6%, 2/120). Type II describes a band-like membrane linkage from duodenum to the DC. Type II-a contains a single band (13.3%, 16/120) and Type II-b has another membrane linkage to other place (20.8%, 25/120). Type III is a long triangle membrane from duodenum to the right dorsal body wall or right kidney (21.6%, 26/120). The duodenum attachment of DC ligament in all cadavers examined is linearly in the antimesenteric border compare to the oblique or L form of the clinic cases. Most of the patients there clinic sign appears between one to two years old, indicated that the irregular attachment may not have influence in small body size, but as the patient grown, intestine lengthen, the enlargement of abdominal and thoracic cavity, the irregular oblique or L form attachment produce an extra pulling force of duodenum canal forming a sharp angle further obstruct the passage of food. The mechanism could be another pathophysiology of chronic vomit or intestinal hypoperistalsis.