Objective To investigate the safety of treatment of symptomatic middle cerebral artery stenosis with Gateway-Wingspan system by reviewing the data on complications.Methods Forty-seven patients with symptomatic middle cerebral artery stenosis treated with Wingspan system were respectively analyzed and emphasis was paid to cases with complications.Relevant data was collected such as characteristics of patients and lesions,selection of ballon and stent and radiographic information.Results Complications were found in 4 patients (8.5％),which were due to cerebral vasospasm,heperperfution syndrome,artery branch rupture and subacute stent thrombosis respectively.Two patients experienced symptomatic intracranial hemorrhage (4.3％)and one of them died (2.1％).The morbidity of severe complications was 6.4％.The success rate of stent implantation was 100％.Mean artery stenosis reduced from (83.5 ± 10.0)％ to (19.8 ± 9.2)％ after Wingspan stent implantation.Conclusion Middle cerebral artery stenting angioplsty greatly improved the stenosis with high technical success rate.However,the rates of cerebral vascular complications and symptomatic intracranial hemorrhage were relatively high in this study,which needs to be widely verified in practice.

Object To investigate the properties of layer crystal structure and its interlayer absorption and expansibility in montmorillonits clay lattice, which provide a basis for the montmorillonite as medicine adjuvant.Methods Montmorillonite sample was separated and purified from clay minerals, and the diameter of particle was less than 1 ?m in colloid, the setting film sample was ready-made, and the samples were analyzed with X-ray diffraction.Results The information of interlayer change pattern on montmori-llonite clay was obtained with different conditions.Conclusion Montmorillonite as swelling and adsorption clay minerals and form an interlayer absorption is possible and the X-ray diffraction can determine the amounts of layer distance.

ObjectiveTo evaluate the role of Janus kinase 2/signal transducer and activator of transcription 3 (JAK2/STAT3) signaling pathway in attenuation of myocardial ischemia-reperfusion (I/R) injury by tetramethylpyrazine in rats.MethodsSixty-four healthy male Wistar rats weighing 250-300 g were randomly divided into 4 groups( n ＝ 16 each):sham operation group (group S),myocardial I/R group(group I/R),teramethylpyrazine group (group T) and AG,490( a JAK2 inhibitor) group (group AG).Myocardial I/R was induced by 30 min occlusion of left anterior desecending coronary artery (LAD) followed by 120 min reperfusion in groups I/R,T and A.In groups T and A teramethylpyrazine 20 mg/kg was injected iv 20 min before LAD occlusion.In group A AG490 3 tμg/g was injected iv at 5 min before reperfusion.Blood samples were then taken from inferior vena cava at 120 min of reperfusion for measurement of serum creatine phosphokinase (CK) and lactose dehydrogenase (LDH) activities.Myocardial infarct size was then measured and myocardial tissue was obtained for microscopic examination.ResultsSerum CK and LDH activities were significantly higher in group I/R than in group S.Pretreatment with tetramethylpyrazine significantly decreased myocardial infarct size and I/R-induced increase in serum CK and LDH activities and histologic damage.The protective effect of tetramethylpyrazine against myocardial 1/R injury was attenuated by postconditioning with AG490.ConclusionJAK2/STAT3 signaling pathway is involved in attenuation of myocardial I/R injury by tetramethyl pyrazine in rats.

OBJECTIVE: To study the correlation between dosage and curative effect of blood coagulation factor VIII in the prevention and treatment of haemophilia A in children and to determine the suitable dose for prevention of hemophilia in developing countries. METHODS: For different body weights of child patient, every time we used the same dosage of blood coagulation factor VIII (250 U each time, 3 times a week) and observed and recorded the number of hemorrhages in child patients. Then we compared the number of hemorrhages with children without treatment to determine the curative effect. According to the different body weights, we calculated the dosage of VIII factor of blood coagulation per kilogram (hereinafter referred to as the dose), and used Spearman correlation coefficient to study the correlation between dose and curative effect. RESULTS: The number of hemorrhages in 58 child patients before the treatment was 4.36 ± 1.78, while after the treatment was 2.22 ± 1.04 (t=7.91, P<0.001). The Spearman correlation coefficient of child patients of 5-10 U/kg was -0.421 (P=0.005); the Spearman correlation coefficient of child patients of 10-15 U/kg was -0.331 (P=0.030); the Spearman correlation coefficient of child patients over 15 U/kg was -0.16 (P=0.325). CONCLUSION Prevention and treatment can significantly reduce the times of hemorrhage in hemophilia patients.
Blood Coagulation ; Child ; Factor VIII ; administration & dosage ; therapeutic use ; Hemophilia A ; therapy ; Hemorrhage ; prevention & control ; Humans

Objective:To explore the feasibility of using ligation clip-assisted modified " expansion and co-llapse method" to determine the intersegment plane in thoracoscopic resection of the external posterior basal segment (S 9+ 10) in children with congenital pulmonary airway malformation (CPAM). Methods:Retrospective study.The clinical data of 12 CPAM children who underwent thoracoscopic S 9+ 10 resection in Children′s Hospital Affiliated to Shandong University from July 2019 to May 2021 were collected and analyzed.There were 7 males and 5 females.The age at operation ranged from 3.50 to 11.50 months.The body weight of patients ranged from 6.5 to 11.5 kg.In all the patients, the ligation clip-assisted modified " expansion and collapse method" was applied during the operation to determine the intersegment plane (S 9+ 10 was in the expansion state and the remaining lungs were in the collapse state) before thoracoscopic S 9+ 10 resection.After S 9+ 10 resection, the surgical treatment and postoperative recovery were summarized and analyzed. Results:All the operations were completed under thoracoscopy, and there was no conversion to thoracotomy.In 11 patients, the intersegment plane was accurately determined by the ligation clips-assisted improved " expansion and collapse method" , and the S 9+ 10 segment was successfully resected.Of these 11 cases, 8 cases had right S 9+ 10 resection and 3 cases had left S 9+ 10 resection.In the process of using the ligation clip-assisted improved " expansion and collapse method" to determine the intersegment plane, the operator needed to clamp the ligation clip after the anesthesiologist expanded the lung completely.Because the operation was not stable enough, the ligation clip fell off and did not clamp S 9+ 10, resulting in operation failure.The operation was changed to the traditional " expansion and collapse method" . Besides, the basal segment bronchus was cut off by mistake, so the right basal segment had to be resected.The operation time ranged from 85 to 205 min, with a median of 149 min.Intraoperative bleeding ranged from 5 to 15 mL, with a median of 10 mL.The indwelling time of drainage tubes ranged from 2 to 4 days, with a median of 3 days.The postoperative hospital stay ranged from 5 to 8 days, with a median of 6 days.Postoperative pathological examination results suggested 4 cases of type 1, 6 cases of type 2 and 2 cases of type 3.There were 2 cases of simple subcutaneous emphysema without postoperative complications such as bleeding, bronchopleural fistula and atelectasis.The follow-up time ranged from 6 to 28 months, with a median of 15 months.The chest CT of all children showed no residual lesions and no residual cavities in the involved hemithorax. Conclusions:Ligation clip-assisted improved " expansion and collapse method" for determining the intersegment plane is suitable for CPAM children with a narrow thoracic space, and the operation is simple and effective.It is relatively safe and feasible to use this method in S 9+ 10 resection.