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Objective:To better understand the pathogenesis of obstructive jaundice (O J),a variety of rat OJ and biliary drainage models have been tried;however,complications are still common.We aimed to establish a stable rat model of OJ using microsurgical techniques,and to assess its reversal by internal bile drainage(IBD).Methods:After the pilot study,we developed a standardized surgical procedure.All operations were carried out under an operating microscope.In the first laparotomy,the proximal common bile duct (CBD) of the rat was ligated and transected.A tube was introduced into the distal end of the duct,and the other end of the tube was sealed and fixed.In the second laparotomy,the drainage tube was inserted into the (by now markedly dilated) proximal CBD,and ligated into position.We evaluated the general condition of the rats,the status of the liver and pancreas before and after IBD.Results:Complications such as intestinal reflux and bile duct blockage,were not found.Pancreatic injury was not evident by day 4 after the first laparotomy.After biliary drainage,the serum glucose and albumin concentration rapidly returned to normal levels.Liver weight/body weight ratio increased.The biochemical indicators and ultrasonographic elastography results for the liver gradually returned to normal.Conclusion:Using microsurgical techniques,we have developed a stable rat model of OJ reversed by IBD.
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<p><b>OBJECTIVE</b>To evaluate the effectiveness of dynamic SPECT (99m)Tc-galactosyl human serum albumin (GSA) scintigraphy on the assessment of reserve function of cirrhosis liver.</p><p><b>METHODS</b>From January 2010 to December 2011, 55 patients with cirrhosis liver were enrolled in this study. The case numbers of male and female were 43 and 12 respectively and the age was (51 ± 9) years (ranging from 35 to 69 years). After routine biochemistry test, CT scan and (99m)Tc-GSA dynamic SPECT scan were performed in turn using a juxtaposed SPECT/CT system. Then the morphologic volume of liver parenchyma (MLV), functional liver volume (FLV) and the hepatic cell absorption rate constant (GSA-K) were calculated. The correlations between GSA-K and routine biochemistry test, Child-Pugh score, indocyanine green clearance rate (ICG-K) were analyzed. The patients were further divided into 3 groups according to whether there was occlusion or stenosis in the main branch of left portal vein (group 1, n = 5), right portal vein (group 2, n = 13) or not (group 3, n = 37) and the regional hepatic functions index of the 3 groups were compared.</p><p><b>RESULTS</b>The value of FLV of the whole, left and right liver was (594 ± 152) ml, (244 ± 119) ml and (356 ± 171) ml, respectively. There were correlations between GSA-K and total bilirubin, prothrombintime, Child-Pugh score and ICG-K (r = -0.730--0.298, P < 0.05). The FLV and MLV ratios of involved hemiliver to uninvolved hemiliver were 0.09 ± 0.06 and 0.30 ± 0.14 in group 1, 0.57 ± 0.43 and 1.08 ± 0.63 in group 2, 0.71 ± 0.30 and 0.71 ± 0.48 in group 3. The difference in MLV-FLV ratio was signifcant between group 1 and group 3, between group 2 and group 3 (P = 0.000).</p><p><b>CONCLUSIONS</b>The dynamic SPCECT (99m)Tc-GSA scintigraphy can not only assess the whole liver function of cirrhosis liver effectively, but also evaluate the variation of regional liver function accurately.</p>