Objective Compared with different decellularization procedures for their potential of cell removal and the ability to preserve the matrix. Methods Specimens of bovine pericardiums were treated by 3 approaches (detergent and enzyme extraction、trypsin 、Triton-X 100 and sodium-deoxycholate). Tissue samples were then observed by HE staining and scanning electron microscopy to confirm the removal of cells. Von Gieson(VG) staining and Gomori staining were used for showing the integrity of collagen and elastin. DNA content was examined by the method of DNA extraction. Tissue shrinkage temperature and mechanical properties were also studied. Results Completely decellularization were achieved in 3 groups. While trypsin、Triton-X 100 and sodium-deoxycholate caused severe structural destruction and declined of mechanical properties of the matrix. In contrast, detergent and enzyme extraction achieved completely deeellularization and effectively preservation the matrix structure. Conclusion This research demonstrated detergent and enzyme extraction could achieve both complete decellularization and preservation of the matrix structure. This approach may provide an ideal platform for the construction of tissue-engineering heart valves.

ObjectiveReport an operation of off-pump occlusion of trans-thoracic minimal invasive surgery (OPOTTMIS) adopted on the therapy of 92 patients suffered with simple congenital heart diseases (CHD) of atrial septal defect ( ASD),ventricular septal defect ( VSD ) and patent ductus arteriosus (PDA) and summarize the experiences.Methods The clinical data of 92 CHD patients administrated with OPOTTMIS in our hospital during the time of July 2008 and July 2011 were analyzed retrospectively.Moreover,the relevant literatures were reviewed and the different kinds of treatments and their outcomes of CHD were compared.These patients were 3-56 years old and weighed 8.0-54.5 kg,with male and female 38 and 54 cases,including ASD 52 cases,VSD 26 cases and PDA 14 cases,respectively.Within the initial 3 months of postoperation,all the patients were followed up and managed to take the re-examination with electrocardiogram and echocardiogram one time for each month,and 3 months later,at least one time for every 3-6 months.Results91 cases were performed the OPTTMIS procedure successfully,1 child with sieve-like ASD transferred to open-heart surgery and 1 adult( 1.1％ ) PDA died on the second day after operation for the pulmonary hypertension crisis.4 cases appeared mild residual shunt including 2 of ASD,1 of VSD and 1 of PDA.2 cases showed Ⅱ stage atrial ventricular block ( AVB ) within ASD and VSD,respectively.Also,post-operation hemothorax happened to 1 case ASD and 1 case VSD for the active bleeding of cardiac puncture site and the exploration and hemostatic operation were performed.91 (98.9％) patients were performed the OPOTTMIS operation successfully,the total complications within 72 hours was 6.5％ (6/92),respectively.There were no heavy complications happened during peri-operation such as cardiac rupture,infective endocarditis,stroke,hemolytic and thrombus formation.90 patients outcomes of 3 months to 4 years follow-up with the ECG and UCG examination showed that there were no Ⅲ stage atrioventricular block,no obvious occluder shift and broken and no moderate cardiac valve regurgitation,no evident blood flow restriction of left ventricular outflow tract and descending aorta,only found mild residual shunt within 2 cases ( VSD and PDA each) and heart expansion compared to pre-operation within 2 PDA patients.However,all the patients'heart functions were in grade Ⅰ to grade Ⅱ according to NYHA standard.ConclusionOPOTTMIS is a safe,feasible and effective option on simple congenital heart diseases.

Objective To assess the effect of the pulsatile catheter (PUCA) pump support on cardiac resuscitation in sheep,and to provide a new approach for saving cardiac arrest patients. Methods Cardiac arrest was induced by ventricular fibrillation in 11 sheep. These sheep were divided into three groups including no support (n=3), delayed support (n=2) and immediate support (n=6). Time for cardiac resuscitation and the ratio of success to failure in each group were recorded. Hemodynamic parameters including heart rate (HR), cardiac output (CO), systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), central venous pressure(CVP),right ventricular end-diastolic pressure (RVEDP),left atrial pressure (LAP), and left ventricular end-diastolic pressure (LVEDP) were monitored and recorded at 5, 60 and 180 min after cardiac resuscitation with PUCA pump. Results Time for cardiac resuscitation in no support group, delayed support group and immediate support group was (38.3±5.8),(43.5±9.2) and (48.7±23.8)minutes, respectively(P＞0.05),and the ratio of success to failure was 0/3,0/2 and 5/1, respectively ( P＜0.05). After cardiac resuscitation with the PUCA pump support, MAP, SBP and DBP increased gradually(P＜0.05).Conclusions PUCA pump can maintain the hemodynamic stability in a sheep model of cardiac arrest,and can thus increase the success rate of cardiac resuscitation. It may be suitable for resuscitating cardiac arrest patients.

BACKGROUND: Acute renal failure following heart failure assisted circulation have been extensively reported. However, little data have been available concerning morphological analysis of kidney tissues under that condition.OBJECTIVE: To observe morphological change of ischemia/reperfusion kidney in a sheep pulsatile catheter (PUCA) pump short-term support for heart failure model and explore causes of acute renal failure in assisted circulation patients.DESIGN, TIME AND SETTING: Self-contrast animal experiment was performed at the laboratory of Department of Cardiothoracic Surgery, Renji Hospital of Shanghai Second Medical University between July 2003 and April 2004.MATERIALS: PUCA pump was provided by Gerhard Rakhorst, Professor of Biomedical Engineering, University of Groningen.METHODS: After ischemic heart failure in 10 sheep was induced successfully and subsequently ischemia/reperfusion kidney was developed, PUCA pump was activated to support the hemodynamics for 3 hours.MAIN OUTCOME MEASURES: Hemodynamic parameters were monitored and recorded before thoracotomy, heart failure, and every 45 minutes after the support. Kidney biopsy specimens for light and electron microscopy were obtained 3 hours after support.RESULTS: PUCA pump support was successful in 7 of 10 sheep for 3 hours. During support with the PUCA pump,Hemodynamic parameters gradually restored to normal and stable condition, and blood pressure was close to baseline at the end of experiment. On both light and electron microscopy examination, mild acute kidney change was observed after ischemia/reperfusion. Cytosis in renal glomerulus associated with vasodilatation hyperemia, endepidermis in renal tubules hydropic degeneration, vasodilatation hyperemia and Interstitial edema in renal medulla were the main findings.CONCLUSION: PUCA pump could successfully maintain the hemodynamics for 3 hours in a sheep acute heart failure model,but pathological change in ischemia/reperfusion kidney was remained. It is impossible to predict prognosis of renal function on hemodynamic data alone during support.

Objective To explore the clinical value of single utility port video-assisted thoracoscopic surgery ( VATS ) for mediastinal tumor . Methods A retrospective analysis was performed on clinical data of 55 patients with mediastinal tumor who received surgical treatment with single utility port video-assisted thoracoscopic surgery in this department from December 2013 to June 2016.Routinely, the surgery was conducted by intraoperatively inserting the thoracoscope via an incision at the seventh intercostals space on the midaxillary line as the observation hole , and making a 3-4 cm transverse incision at the fourth intercostals space between the midaxillary line and the anterior axillary line as the operation hole .Postoperatively , the observation hole served as the passage for closed thoracic drainage tube . Results Among the 55 patients, 50 received total thoracoscopic surgery .In 3 cases with relatively large tumor, the surgery was conducted with additional assisted small incisions .Thoracotomy was carried out in another 2 cases due to bleeding when separating pulmonary artery branch and difficult hemostasis under thoracoscopy .The surgery duration was (100 ±46) min, the intraoperative blood loss was (85 ±38) ml, the postoperative chest drainage volume was (450 ±80) ml, the postoperative time to chest tube withdrawal was (3.0 ±1.6) d, and the postoperative duration of hospital stay was (6.2 ±1.5) d in the 50 cases of VATS.All the patients recovered well .Postoperatively , there were 1 case of myasthenic crisis , 2 cases of pneumothorax and 3 cases of pleural effusion, all of which were improved with symptomatic treatment .All the 55 cases were followed up for 2-24 months (mean, 11.2 ±7.3 months) and there were no tumor recurrences . Conclusion Single utility port VATS of mediastinal tumor resection has advantages in safety , efficacy, and cosmetic outcomes , being worthy of further clinical application .

Pregnancy ; Female ; Humans ; Cesarean Section ; Retrospective Studies ; East Asian People ; Maternal Age ; Policy

Objective    To investigate the tunnel-type open reduction and internal fixation of rib fractures (ORIF) with titanium locking plate in traumatic rib fractures. Methods    Clinical data of 10 patients with multiple rib fractures from June 2016 to January 2017 in the Sixth People’s Hospital Affiliated to Shanghai Jiaotong University were analyzed. There were 6 males and 4 males with an average age of 38.5±9.0 years (range, 30–63 years). All patients underwent emergency treatment, chest CT and ultrasound examination before they admitted to the hospital. According to rib fractures and injuries, patients were given the tunnel-type ORIF of rib fractures with titanium locking plates, the chest tube and negative suction drainage. The patients were followed up over three months. Results    All patients were cured. There was no complication during follow-up. No wound infection and death occurred. Postoperative three-month follow-up showed that chest pain was significantly relieved without pulmonary atelectasis and pleural effusion or other complications. Conclusion    Tunnel-type internal fixation of rib fractures with titanium locking plates is effective, which can quickly restore the stability and integrity of the thorax. Surgical procedure is simple and can get fast postoperative recovery to improve the patient's quality of life.