ObjectiveTo evaluate the intermediate term efficacy of posterior stabilized (PS) total knee arthroplasty(TKA) and posterior cruciate-retaining(CR) TKA and explore the clinical related problem.MethodsThe clinical data of 84 patients (87 knees) who treated with primary TKA from May 1992 to May 2006 were analyzed retrospectively.The intermediate term efficacy was compared between PS TKA (PS group,41 cases with 43 knees) and CR TKA (CR group,43 cases with 44 knees).ResultsAll the patients were followed up for 5-10(7.6 ± 1.5 ) years,no infection,dislocation or neurovascular injury occurred in both groups.But 1 knee occurred intraoperative posterolateral femoral condyle fracture in PS group.The lateral retinacular release rate was 2.3％ ( 1/43 ) and 2.3％ (1/44) in PS group and CR group,respectively.The incidence of anterior knee pain was 4.7％(2/43 ) and 4.5％(2/44) after 6 months surgery in PS group and CR group.The incidence of anterior knee pain was 0 at the end of follow-up in both groups.There was no significant difference in the lateral retinacular release rate and the incidence of anterior knee pain between two groups (P ＞0.05).The range of motion and American knee society score(KSS) was similar and no statistical difference was found between two groups(P ＞ 0.05 ).The incidence of patellar tilt or subluxation in X-ray was 2.3％ (1/43) and 2.3％ (1/44) at the end of follow-up in PS group and CR group.There was no significant difference between two groups (P ＞ 0.05 ).At the end of follow-up,no osteolysis,X-ray radiolucent zone and prosthesis loosening were found in both groups.There was no revision owing to loosening or other reasons.ConclusionsThe intermediate term efficacy of PS TKA and CR TKA is near a tie.However,the future efficacy still need further follow-up.

Objective To investigate the risk factors of portal venous thrombosis ( PVST) following laparoscopic splenectomy ( LS) in cirrhotic patients with hypersplenism .Methods The clinical data of 62 patients with secondary hypersplenism due to cirrhotic portal hypertension admitted to the Clinical Medical College of Yangzhou University were retrospectively analyzed .These patients underwent LS from January 2013 to April 2014.Based on whether the patients had PVST on postoperative day (POD) 7 or not, the pa-tients were categorized into the non-PVST and PVST groups .Fifteen perioperative variables were analyzed in these two groups .Results On univariate analysis , age and portal vein diameter in the PVST group were significantly higher and velocity of portal blood flow in the PVST group were significantly lower than those in the non-PVST group, (all P<0.05).Bivariate correlation analysis performed for the relationship between these variables and occurrence of PVST on POD 7 showed age >50 years, portal vein diameter >13 mm and velocity of portal blood flow >18 cm/s were significantly correlated .Multivariate logistic regression showed that age >50 years and portal vein diameter >13 mm were significantly independent risk factors of PVST, and velocity of portal blood flow >18 cm/s was an independent protective factor .Conclusion Age>50 years and portal vein diameter >13 mm were independent risk factors , while velocity of portal blood flow >18 cm/s was an independent protective factor of postoperative PVST .

Objective To explore the feasibility and effect of spleen-preserving distal pancreatectomy in patients with distal pancreatic injures and its outcome.Methods Retrospectively analysed the follow up results of 18 patients undergoing spleen-preserving distal pancreatectomy in Clinical Medical College of Yangzhou University from March 2008 to November 2012.Results The operations were successful in all of these 18 patients,B-mode ultrasonography and CT scan follow-up revealed that there were no significant changes in the size and structure of the spleens.The operation time was 152 to 188 minutes (mean,172 minutes),and the intraoperative blood loss was 155 to 356 mL (mean,191 mL).The length of postoperative hospital stay was 13 to 19 days (mean,15 days).No bleeding after operation,no pancreatic leakage,and no intraabdominal infection occurred.Conclusions Distal pancreatectomy with spleen and supply vessel preserving is effective and feasible methods for the patients with distal

Objective To investigate the safety and clinical efficacies of synchronous laparoscopic hepatectomy combined with splenectomy for the treatment of hepatocellular carcinoma (HCC) associated with cirrhotic portal hypertensive hypersplenism.Methods The clinical data of 5 patients with HCC associated with cirrhotic portal hypertensive hypersplenism who were admitted to the Clinical Medical College of Yangzhou University between January 2015 and April 2015 were retrospectively analyzed.Five patients underwent synchronous laparoscopic hepatectomy combined with splenectomy and intraoperative autologous blood transfusion.The operation time,volume of intraoperative blood loss,time for diet intake,postoperative drainage tube removal time,duration of hospital stay and occurrence of complications were observed.Patients were followed up by outpatient examination and telephone interview till June 2015.Measurement data with normal distribution were presented as x ± s.Results Of the 5 patients without conversion to open surgery,3 patients underwent synchronous laparoscopic hepatectomy combined with splenectomy,1 patient underwent laparoscopic hepatectomy + splenectomy + cholecystectomy and 1 patient underwent laparoscopic hepatectomy + splenectomy + devascularization.The operation time and volume of blood loss were (225 ± 41)minutes and (221 ± 81)mL.All the patients received intraoperative autologous blood transfusion without homologous blood transfusion.Two patients were complicated with abdominal effusion including 1 patient associated with pleural effusion,and symptoms of 2 patients disappeared after conservative treatment.All the patients took fluid diet at postoperative day 1 and out-of-bed activity at postoperative day 2,and drainage tubes were removed at postoperative day 3,with good recovery and without perioperative death.The duration of postoperative hospital stay was (7.8 ±0.8)days.All the 5 patients were followed up and survived well up to the end of follow-up.Conclusion Synchronous laparoscopic hepatectomy combined with splenectomy is safe and feasible for the treatment of HCC associated with cirrhotic portal hypertensive hypersplenism with an exact curative effect.

Objective To investigate the feasibility and safety of elective synchronous laparoscopic splenectomy plus portaazygous disconnection and hepatectomy for cirrhotic portal hypertension patients with hypersplenism, esophageal and gastric variceal bleeding and hepatocellular carcinoma.Methods Two hepatocellular carcinoma patients with a history of upper gastrointestinal hemorrhage and secondary hypersplenism underwent one stage, non-emergency laparoscopic splenectomy plus portaazygous disconnection and hepatectomy between April 2015 and May 2015 in our department.Autologous red cell salvage was used during the operation.Liver resection was performed after splenectomy, portaazygous disconnection and the use of cell saver.Results The two operations were performed successfully.The operative time was 190 min and 205 min respectively, Volume of intraoperative bleeding was 180 ml and 260 ml.There was no intraoperative homologous blood transfusion.The two patients recovered smoothly, without major complications and postoperative hospital stay was 8 d and 9 d.Conclusions The procedure of synchronous laparoscopic splenectomy and azygoportal disconnection with hepatectomy for cirrhotic patients with hepatocellular carcinoma, hypersplenism and esophageal and gastric variceal bleeding is safe and feasible.

Objective To evaluate modified laparoscopic hepatic hemangioma extraction methods during laparoscopic hepatectomy.Methods From May 2009 to June 2013, 25 hepatic hemangioma patients were admitted for laparoscopic hepatectomy.Patients were divided into modified laparoscopic group with modified laparoscopic hepatic hemangioma extraction methods (MLH, n =11) and traditional laparoscopic group (TLH, n =14).Perioperative clinical parameters were compared between the two groups.Results Operative time (148.6 ± 18.0) min, time to removal of the HCH (15.7 ±4.6) min, visual analog scale pain score on the first postoperative day (2.3 ± 0.9), time to off-bed activity (2.5 ± 0.8) d, and postoperative hospital stay (8.5 ± 2.6)d in the MLH group were all less than those in the TLH group [(163.9±13.2)min, (33.9±3.1)min, (3.4±0.9), (3.1±0.8)d, (10.6±1.9)d] (t=-2.451,t =-11.800, t =-2.931, t =-2.156, t =-2.338,P ＜ 0.05).There were one in the MLH group and two cases in the TLH group developing postoperative complications (P =1.000).Conclusions Modified laparoscopic hepatic hemangioma extraction methods during laparoscopic hepatectomy for hepatic hemangioma is safe, feasible and of good therapeutic effect.

Objective To investigate the short-term therapeutic effect of warfarin in preventing portal vein thrombosis (PVT) after modified laparoscopic splenectomy combined with pericardial devascularization.Methods The retrospective cohort study was used to analyze the clinical data of 32 patients with cirrhotic portal hypertension who were admitted to the Clinical Medical College of Yangzhou University between January 2014 and August 2014.The characteristics of warfarin and aspirin regimens were introduced to the patients before operation for choosing postoperative therapeutic regimen.Based on the decisions, 17 and 15 patients receiving warfarin regimen and aspirin regimen were divided into the warfarin group and the aspirin group, respectively.All the patients underwent successful modified laparoscopic splenectomy and pericardial devascularization with intraoperative autologous blood salvage.The treatments were as follows : from postoperative day 3, patients in the warfarin group received 2.5 mg of oral warfarin once daily with titration of the dose to maintain a target international normalized ratio (INR) of 2.0-3.0 for 1 year;patients in the aspirin group received 100 mg aspirin enteric coated tablets for 1 year;and both groups received 50 mg of oral dipyridamole three times daily for 3 months and subcutaneous injection of 4 100 U of low-molecular-weight heparin (LMWH) once daily for 5 days.Blood cell analysis, liver function, coagulation function and Doppler ultrasound screening for the occurrence of PVT were performed at the first and third months.Postoperative electronic gastroscopy was performed at 3 months postoperatively for observing the change of the esophageal and gastric-fundus varices.The patients were followed up till February 2015.The incidences of PVT and the level of INR at the first week, the first month and the third month after operation were observed.Measurement data with normal distribution were presented as (x) ± s and analyzed by t test, and measurement data with skewed distribution were presented as M(range) and analyzed by the rank-sum test.Comparison of the mean INR at different time points between the 2 groups was analyzed by the repeated measures ANOVA.Comparison of count data was analyzed by the Fisher's Exact Probility.Results There were no gastrointestinal hemorrhage or perioperative death in the 2 groups.(1) The overall incidences of PVT at postoperative week 1 were 9/17 and 6/15 in the warfarin and the aspirin groups, respectively, with no significant difference (P ＞ 0.05).However, the overall incidences of PVT at postoperative month 1 and 3 were 7/17 and 3/17 in the warfarin group, which was significantly different from 12/15 and 12/15 in the aspirin group (P ＜ 0.05).(2)The incidences of main portal vein thrombosis (MPVT) at postoperative week 1 and postoperative month 1 were 5/17 and 6/17 in the warfarin group, 4/15 and 5/15 in the aspirin group, showing no significant difference (P ＞ 0.05).The incidence of MPVT at postoperative month 3 was 3/17 in the warfarin group, which was significantly different from 9/15 in the aspirin group (P ＜ 0.05).(3) The INR was changed from 1.30 ± 0.17 before operation to 1.55 ± 0.38 at postoperative month 3 in the warfarin group, and from 1.33 ±0.14 before operation to 1.21 ±0.11 at postoperative month 3 in the aspirin group, showing significant difference in the changing trend between the 2 groups (F =713.908, P ＜ 0.05).(4) All the 32 patients were followed up for a median time of 7 months (range, 3-11 months).The results of electronic gastroscopy at postoperative month 3 showed that the esophageal and gastric-fundus varices were obviously improved or disappeared.Conclusion Warfarin in preventing PVT after modified laparoscopic splenectomy combined with pericardial devascularization is safe and feasible, with a good short-term outcome.

Objective To study the etiological effect between the spatial variation of lumbar facet orientation and the degenerative lumbar spondylolisthesis(DLS)in axial,sagittal and coronal plane.Methods 85 patients with DLS at L4 and 110 controlsreceived X-ray and CT scanning.The facet angle at L4-L5 was measured in axial,sagittal and coronal plane.Results Compared with the control group, the DLS-angles were lesser and the difference between the left and right was greater in axial,coronal plane(P <0.05).But were greater in sagittal plane(P <0.05).Conclusion The DLS-angles are more sagittal in axial plane,more level in sagittal plane and more erect in coronal plane.The change of spatial orientation in the facet joint is one of etiological factors of degenerative lumbar spondylolisthesis.

Objective To investigate the feasibility and safety,and short-term therapeutic effect of laparoscopic azygoportal disconnection without splenectomy for cirrhotic portal hypertension (PLT count ＞ 50 × 109/L).Methods Clinical data of 48 patients with bleeding portal hypertension and secondary hypersplenism (PLT count ＞ 50 × 109/L) undergoing laparoscopic splenectomy and azygoportal disconnection (LSD,n =26) vs.laparoscopic azygoportal disconnection (LD,n =22) between January 2014 and August 2015 were analyzed.Results Operative time (82 ± 29) min,intraoperative blood loss 20(10-50) ml,days of postoperative fever 0(0-3) d,rate of postoperative fever 10/22,postoperative hospital stay (7.0 ± 1.3) d,and WBC counts (3.8 ± 1.6) × 109/L,PLT counts 64 (49-88) × 109/L,and the incidence of portal vein thrombosis on POD 7 (14％),were significantly less in LD group than in LSD group [(180±41) min,80(20-500) ml,2(0-4) d,(22/26),(10.8 ±3.0) d,(9.1 ±3.1) × 109/L,156 (78-630) × 109/L,(42％)],(t =9.637,Z =-4.746,Z =-2.314,x2 =8.224,t =5.794,t =7.785,Z=-5.508,x2 =4.742,all P ＜ 0.05).Immune function was better in LD group than in splenectomy group at postoperative month 3.The serum proportion of CD4 + (58 ± 11) and the CD4 +/CD8 + ratio (1.9 ±0.7) at postoperative month 3 were significantly higher after LD than after LSD [(43 ± 14),(1.2 ± 0.9)],(t =-3.755,t =-2.509,all P ＜ 0.05).Conclusion Laparoscopic azygoportal disconnection without splenectomy is safe and effective for esophagogastric variceal hemorrhage and moderate hypersplenism (PLT ＞ 50 × 109/L) secondary to portal hypertension.

Timely reporting, effective analyses and rapid distribution of surveillance data can assist in detecting the aberration of disease occurrence and further facilitate a timely response. In China, a new nationwide web-based automated system for outbreak detection and rapid response was developed in 2008. The China Infectious Disease Automated-alert and Response System (CIDARS) was developed by the Chinese Center for Disease Control and Prevention based on the surveillance data from the existing electronic National Notifiable Infectious Diseases Reporting Information System (NIDRIS) started in 2004. NIDRIS greatly improved the timeliness and completeness of data reporting with real time reporting information via the Internet. CIDARS further facilitates the data analysis, aberration detection, signal dissemination, signal response and information communication needed by public health departments across the country. In CIDARS, three aberration detection methods are used to detect the unusual occurrence of 28 notifiable infectious diseases at the county level and to transmit that information either in real-time or on a daily basis. The Internet, computers and mobile phones are used to accomplish rapid signal generation and dissemination, timely reporting and reviewing of the signal response results. CIDARS has been used nationwide since 2008; all Centers for Disease Control and Prevention (CDC) in China at the county, prefecture, provincial and national levels are involved in the system. It assists with early outbreak detection at the local level and prompts reporting of unusual disease occurrences or potential outbreaks to CDCs throughout the country.