Objective To investigate the factors related to healing of severe diabetic foot gangrene (Wagner 4 class above) infected with pan-resistant Pseudomonas aeruginosa,and to guide clinical treatment.Methods Forty-nine hospitalized patients with diabetic foot gangrene (Wagner 4 class above) from January 2009 to July 2014 were enrolled.The affected foot wound secretion culture was pan-resistant Pseudomonas aeruginosa.According to the wound healing time,they were divided into wound healing group (26 cases,healing time ≤ 3 months) and wound un-healing group (23 cases,healing time ＞ 3 months).The general information,clinical indicators and treatment between two groups were compared,and the factors related to healing was analyzed by multi-factor unconditioned Logistic regression analysis.Results Compared with those in wound un-healing group,the blood flow volume of dorsal artery of affected foot and negative pressure attraction rate in wound healing group were higher:(43.59 ± 2.71) ml/min vs.(23.14 ± 5.39) ml/min,76.9％ (20/26) vs 47.8％(11/23),and the urinary micro-albumin was lower:(67.01 ± 3.32) mg/L vs.(234.03 ± 6.71) mg/L.There were significant differences (P ＜ 0.05 or ＜ 0.01).Multi-factor unconditioned Logistic regression analysis showed that the factors related to healing of severe diabetic foot gangrene infected with pan-resistant Pseudomonas aeruginosa were the blood flow volume of dorsal artery of affected foot (regression coefficient was-5.551,P =0.001),urinary micro-albumin (regression coefficient was 0.127,P =0.007) and negative pressure attraction (regression coefficient was-2.244,P =0.042).Conclusion The blood flow volume of dorsal artery of affected foot,urinary micro-albumin,negative pressure attraction are the factors related to healing of severe diabetic foot gangrene infected with pan-resistant Pseudomonas aeruginosa.

Objective To establish a diagnostic scoring system for coronary artery disease(CAD)in patients with diabetic foot(DF)and evaluate its application efficiency. Methods The clinical data of 445 DF inpatients were analyzed retrospectively in this case?control study. These patients were divided into the CAD group(n=372,DF with CAD)and the control group(n=73,DF without CAD)according to the presence or absence of CAD. Risk factors were screened from related clinical factors examined through multiple logistic regression analysis for CAD in patients with DF and were assigned according to odds ratio(OR)to establish the scoring system for diagnosis of CAD in patients with DF. Application efficiency of the di?agnostic scoring system was tested by calculating area under the receiver operating characteristic(ROC)curve. Results The multiple logistic re?gression analysis showed that risk factors for CAD in patients with DF were age,male sex,the duration of diabetes≥10 years,the ankle?brachial in?dex(ABI)≤0.9,body mass index(BMI)≥25 kg/m2 and chronic renal insufficiency. According to ORassigned age(<50 years=0,50?64 years=1,≥65 years=2),sex(female=0,male=2),the duration of diabetes(<10 years=0,≥10 years=3),ABI(>0.9=0,≤0.9=2),BMI(<25 kg/m2=0,≥25 kg/m2=3)and chronic renal insufficiency(absent=0,present=3)scores. Area under the ROC curve of the diagnostic score scheme was 0.758(0.682?0.835),the standard error was 0.039,and the point of the diagnosis of CAD was 7. Conclusion The scoring system established in the study is efficacious,simple and practical,which provides an important reference for CAD in patients with DF.

Objective To investigate the clinical effects and indications of the vacuum sealing drainage (VSD) in the treatment of severe diabetic foot gangrene.Methods We randomly recruited 60 cases,who had suffered from diabetic foot gangrene(DFG) at the grade of 3 -5,according to Wagner scale into VSD treatment groups and treated them with VSD methods.At the same time,62 DFG cases who had given routine drainage treatment one year ago were retrospectively analyzed as control group.The observed items included the wound healing time,number of dressing,outcome of treatment ( healing rate),the average days in hospital,total expenses of hospitalization and so on.Results The wound healing time of VSD treatment group and routine treatment group were ( 30.5 ± 6.8 ) days and ( 53.8 ± 5.5 ) days,respectively ( t =2.636,P ＜ 0.01 ).The numbers of dressing were( 15.0 ± 4.7) days and ( 29.5 ± 6.1 ) days,respectively ( t =2.374,P ＜ 0.01 ).The healing rates were 96.7％ (58/60) and 87.1％ (54/62),respectively(P ＜0.01 ).The average period in hospitalization were (20.1 ± 3.5 ) days and ( 36.5 ± 4.6 ) days,respectively ( t =2.564,P ＜ 0.01 ).Total expenses of hospitalization were(20 155.6 ± 153.8) yuan RMB and(41 465.5 ± 146.6) yuan RMB,respectively(t =2.873,P ＜0.01 ).All the differences were statistically significant.Conclusion The VSD method is effective for the treatment of severe diabetic foot gangrene(DFG).It is able to reduce the time of wound healing significantly,increase the healing rate,shorten the hospitalization period and cut the general expenses during hospitalization.It' s an effective method for the treatment of DFG.

Objective To explore the risk factors for lower extremity amputation in patients with diabetic foot.Methods The clinical data of 1 771 patients with diabetic foot at the Air Force General Hospital of PLA from November 2001 to April 2015 were retrospectively analyzed.The patients were divided into the non-amputation and amputation groups.Within the amputation group , subjects were further divided into the minor and major amputation subgroups.Binary logistic regression analyses were used to assess the association between risk factors and lower extremity amputation.Results Among 1 771 patients with diabetic foot , 323 of them ( 18.24%) were in the amputation group ( major amputation: 41; minor amputation:282 ) and 1 448 ( 81.76%) in the non-amputation group.Compared with non-amputation patients, those in the amputation group had a longer hospital stay and higher estimated glomerular filtration rate(eGFR)levels.Fasting plasma glucose (FPG), glycosylated hemoglobin (HbA1c), C-reaction protein (CRP), ESR, ferritin, fibrinogen and WBC levels of the amputation group were higher , while hemoglobin albumin, transferrin, TC, TG, HDL-C and LDL-C were lower than those of the non-amputation group (all P<0.05 ).The proportion of hypertension ( 52.48% vs 59.98%) , peripheral vascular disease ( PAD ) (68.11% vs 25.04%), and coronary heart disease (21.33% vs 28.71%) were different between the amputation and non-amputation groups (all P<0.05).Multivariable logistic regression analyses showed that Wagner′s grade , PAD and CRP were the independent risk factors associated with lower extremity amputation in hospitalized patients with diabetic foot.Conclusion Wagner′s grade, ischemia of lower limbs and infection are closely associated with amputation of diabetic foot patients.