Objective To investigate the application of quality control cycle activity in reducing thedisquali-fication rate of bowel preparation for colonoscopy outpatients.Methods Set up a group of quality control circle,and select the issues that reducing the disqualification rate of bowel preparation for colonoscopy outpatients as the activity theme.According to the activity steps of quality control circle,the activity was carried out.The causes of disqualifica-tion rate of bowel preparation were analyzed and the countermeasures to improve and implement were implemented. Also,the disqualification rates of bowel preparation before and after quality control circle were compared.Results The disqualification rate of bowel preparation was reduced from 39.09% to 14.03% after quality control circle activi-ty.The difference was statistically significant(χ2 =53.65,P <0.01).Target success rate was 104.42%,and the pro-gress rate was 64.11%.Conclusion The quality control circle activity can effectively reduce the disqualification rate of bowel preparation for colonoscopy outpatients,thereby improve the quality of diagnosis and treatment,and reduce the economic burden of patients.After clear improvement of focus,the leading causes of disqualification bowel prepa-ration are obtained through characteristic diagram (figure 2)analysis.Also,true causes are validated based on the three principles.The four true causes final defined include short contact time nurses and patients,large liquid dosage, none nursing intervention outside hospital,and chronic constipation without intervention.

Objective To analyze retrospectively the relationship between protein nutrition index (PNI) and survival conditions in patients with peritoneal dialysis (PD).Methods Various clinical and laboratory indexes of patients with chronic kidney disease from January 2004 to January 2014 were analyzed retrospectively.PNI score was determined by serum albumin (ALB),normalized protein nitrogen presentation rate (nPNA),lean body mass (LBM).According to PNI score,PD patients were divided into four groups:good nutrition status,nutrition status in general,poor nutrition,PEW status.Linear regression analysis was used to analyze determine factors of PNI;analysis of Kaplan-Meier was applied to examine relationship between the protein nutrition status and survival rate;COX regression analysis was used to analyze the risk factors for survival in patients with PD.Results All the indexes,age,complications index,serum Cr,K-Kt/V,T-Kt/V had a linear relationship with PNI.5-year survival rate in the four groups were respectively 95％,92％,65％,23％.Age,complications,PNI index were the survival risk factors of PD patients.Conclusions According to PNI score,evaluation of protein nutritional status of patients with PD could predict survival conditions of PD patients,the higher PNI score,the higher survival rate.