Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=50171#.VDSjMlfHRK0 Author(s) Jinwen Zhang , Meng Li , Feng Zhang Affiliation(s) Department of Vascular Surgery, the Second Hospital of Hebei Medical University, Shijiazhuang, China . ABSTRACT Background: To investigate the changes in plasma levels of endothelin (ET), nitric oxide (NO), prostacyclin (PGI 2 ) and thromboxane A 2 (TXA 2 ) in patients undergoing abdominal operation. Materials and Methods: Thirty cases of abdominal surgery (14 males, 16 females; mean age 48 ± 11 years, ranging from 24 to 70) were prospectively recruited: Twenty-four cases of cholelithiasis and cholecystitis, 2 cases of peptic ulcer and 4 cases of portal vein hypertension...
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