Objective To explore the value and the most reasonable procedure of EN by naso-intestinal tube in digestive tract disease after operation.Methods Data of 25 cases of indigestive tract disease subject to EN through a naso-intestinal tube after operation were reviewed and analysed.Results Insertion of naso-intestinal tube was completed in all cases.Nasal feeding could be completed in 24 cases;postoperative complications included 1 case of leakage,1 case of arrhythmia and heart failure and 4 cases of fat liquefication.Conclusion EN by naso-intestinal tube in digestive tract disease was favorable for reduction of postoperative risk.It could be applied in almost all pa- tients when the doctor had grasped the technique skillfully.

Objective:To investigate the aberrant methylation of CpG island in 5′promoter region of p16 gene in the pancreatic juice and its value in diagnosis of patients with pancreatic cancer.Methods:Pure pancreatic juice(PPJ)was collected from the pancreatic duct by a nasopancreatic tube put under endoscopic retrograde cholangiopancreatography(ERCP). Cytological examination was performed by H-E staining in pure pancreatic juice.Aberrant p16 methylation was detected using the methylation specific PCR(MSP)in the PPJ.Results:The sensitivity,specificity,positive predictive value,negative predictive value and accuracy cytological examination in diagnosis of pancreatic cancer were 40%,100%,100%,45.4% and 60.0%,respectively.The DNA sequences were successfully extracted from the PPJ of 30 patients with pancreatic diseases and were subjected to MSP.Seven(35%)of the 20 cases with pancreatic cancer showed aberrant methylation of p16 gene.No aberrant methylation was detected in the pancreatic juice samples of patients with chronic pancreatitis and mucinous cystoadenocarcinoma of pancreas.When cytological examination combined with p16 methylation detection,the sensitivity, specificity,positive predictive value,negative predictive value and accuracy for diagnosis of pancreatic cancer were 55%,100%, 100%,52.6% and 70%,respectively.Conclusion:Pancreatic juice collected by nasopancreatic drainage during ERCP can be used for molecular analysis.Detection of aberrant methylation of p16 gene in pancreatic juice combined with cytological examination is a better method for diagnosis of pancreatic cancer.