ABSTRACT
Objective To study the effect of magnesium citrate combined with compound polyethylene glycol electrolyte powder in bowel preparation before colonoscopy.Methods One hundred and six colonoscopy patients with lower digestive tract symptom were divided into study group (54 cases) and control group (52 cases) by random digits table method,the bowel preparation in study group was magnesium citrate combined with compound polyethylene glycol electrolyte powder,in control group was compound polyethylene glycol electrolyte powder.The lesions detection rate,bowel preparation quality,time of first defecation,number of defecation,time of colonoscopy,results of the electrolyte level and liver and kidney function after medication and adverse reaction were compared between two groups.Results There were no statistical differences in lesions detection rate,time of colonoscopy,results of the electrolyte level and liver and kidney function after medication between two groups (P ＞ 0.05).The total effective rate of bowel preparation quality in study group was significantly higher than that in control group [96.3％(52/54) vs.82.7％ (43/52)],the time of first defecation was significantly shorter than that in control group [(32.5 ± 26.1) rmin vs.(47.2 ± 22.4) min],the number of defecation was significantly much than that in control group [(8.2 ± 2.9) times vs.(6.2 ± 2.6) times],there were statistical differences (P ＜ 0.05).The incidence of nausea in study group was significantly lower than that in control group [22.2％ (12/54) vs.48.1％ (25/52)],there was statistical difference (P ＜ 0.05).There were no statistical differences in the incidences of vomiting,abdominal distention and abdominal pain between two groups (P ＞ 0.05).Conclusion Magnesium citrate combined with compound polyethylene glycol electrolyte powder used in preoperative bowel preparation for colonoscopy has better clinical application value.
ABSTRACT
Objective To establish a complete heat transfer boundary condition model in a cockpit including the inner wall heat transfer boundary condition and the air supply heat transfer boundary condition of the air distribution system. Methods The temperature field in the cockpit was carried out unmerical caculation with above model and the traditional method which was assumed uniform heat flux through walls and flow flux out of each air supply hole individually.An experiment was carried out to prove the caculation accuracy of both methods. Results The comparison between calculation and experiment results shows that the temperature field calculation accuracy of this model was much higher than traditional method’s.This model could indicate the unevenness and the asymmetry of the heat transfer through walls and the air temperature out of air supply holes of air distribution system. Conclusion This model is reasonable and has a good engineering application value.