Objective To survey the factors associated with deep venous thrombosis after artificial liver treatment in patients with liver failure. Methods A retrospective survey was used in our hospital from January 2014 to December 2016 consecutive liver failure patients by artificial liver treatment, collected patient data, including general demographic information, medical history. Results Medical history data were collected from 189 compliance cases, including deep venous thrombosis group (11 cases),no deep venous thrombosis group(178 cases),and 5.82%(11/189)of deep vein thrombosis.There were significant differences in age(χ2=7.17, P=0.027), catheterization(χ2=4.99, P=0.025), number of successful venipuncture(χ2=10.856, P=0.004),artificial liver frequency(χ2=67.481, P<0.01), activity status(χ2=9.607, P=0.022), D-dimer(t=12.318, P<0.01), infection(χ2=17.231, P=0.001)and other factors in thrombosis group and thrombus group(P<0.05).Logistic regression showed that age(OR=1.643, P=0.01),activity status(OR=1.643,P=0.01),number of successful venipuncture(OR=6.049,P<0.01),D-dimer(OR=2.532, P=0.005)and infection(OR=2.463, P=0.008)were independent risk factors for thrombosis. Conclusions Deep vein thrombosis after artificial liver injury in liver failure is not uncommon, and the prevention of deep vein thrombosis after artificial liver surgery is strengthened, especially for elderly, absolute bed, venous puncture injury patients, elevated D-dimer and infected patients.

Objective To evaluate the clinical efficacy of percutaneous piercing cortical bone at fracture ends and local injection of autologous concentrated bone marrow aspirate (cBMA) and platelet rich plasma (PRP) in the treatment of delayed fracture union.Methods A retrospective study was performed on the clinical data of 34 patients with delayed fracture union who had been treated at Department of Orthopaedics,Luoyang Zhenggu Hospital of Henan Province from April 2014 to February 2017.They were 26 males 8 females,aged from 18 to 63 years (average,36.7 years).There were 15 femoral,11 tibial,5 humerus and 3 ulnar fractures.According to the Weber-Crech classification,14 cases belonged to the type of rich blood supply-active end hypertrophy and 20 to the type of poor blood supply and malnutrition.There were 28 closed and 6 open fractures.Of this cohort,21 cases had their primary fixation,7 had revision once,4 had revision twice,and 2 had revision more than thrice;19 cases had intramedullary fixation,12 had plate fixation and 3 had external fixation.Autologous iliac bone grafting was performed previously in 19 cases.Kirschner wire was used under fluoroscopy to pierce percutaneously the cortical bone at fracture ends;bone marrow blood and peripheral venous blood were collected to prepare autologous cBMA and PRP which were to be injected locally at the fracture ends after mixture.At the last follow-up,the patients were evaluated by visual analogue scale (VAS),SF-36 health survey summary scores and modified Radiographic Union Score for Tibia (RUST).Results The patients were followed up for 12 to 42 months (average,21.5 months).Thirty-one patients healed after surgery,yielding a healing rate of 91.2％.The healing time averaged 5.3 months (from 4 to 10 months).No patient reported such complications as infection or neurovascular injury.At the last follow-up,the VAS scores of the 34 patients were 1.3 ± 0.6 points,significantly lower than the preoperative 5.4 ± 3.6 points (P ＜ 0.05);the postoperative SF-36 scores 74.8 ± 16.5 points,significantly increased than the preoperative 44.8 ± 15.6 scores (P ＜ 0.05);the RUST scores 3.3 ± 0.4 points,significantly higher than the preoperative 1.6 ± 0.8 points (P ＜ 0.05).Conclusions Minimally invasive percutaneous piercing of K-wire on the cortical bone at the fracture ends may result in fluid leakage and restart bone healing process.At the same time,local injection of autologous cBMA and PRP may increase the number and concentration of local bone marrow mesenchymal stem cells and growth factors,promoting fracture healing.

Objective:To investigate the ultrasonographic features and prognosis of fetal vascular anomalies.Methods:Thirty-one fetuses with vascular anomalies diagnosed from June 2013 to August 2018 in Changsha Hospital for Maternal and Child Health Care were retrospectively analyzed. The location, size, shape, internal echo and blood flow distribution of the lesions were observed by ultrasound carefully, and the prognosis was followed up and analyzed.Results:Among the 31 cases of fetal vascular anomalies, 10 cases were comfirmed by autopsy after induced labor, and 21 cases were confirmed by postpartum local observation or surgery and pathology. Among them, there were 4 cases of Klippel-Trenaunay syndrome (including 1 case of Parkes-Weber syndrome), 3 cases of hemangioma, 1 case of primary congenital lymphedema and 23 cases of lymphangioma. Thirty-one cases showed lesions coincident with ultrasound localization and diagnosis, including 9 cases of head and neck lesions, 15 cases of trunk lesions, 1 case of upper limb lesion and 6 cases of lower limb lesions. The blood flow spectra of arteriovenous fistulas were found in 3 cases of fetal lesions and no obvious blood flow signals were found in 28 cases of fetal lesions.Conclusions:Prenatal ultrasound examination and follow-up play an important role in the diagnosis and prognostic prediction of fetal vascular diseases. The prognosis of fetal vascular diseases is closely related to the location, size, effect on the surrounding tissue and shunt volume of the lesion.

Silicon carbide (SiC) film and silicon dioxide (SiO ) film were deposited on the surface of carbon/carbon composite (C/C) by low pressure chemical vapor deposition (LPCVD). The biocompatibility of the three carbon-based composites, e. g. C/C, C/C-SiC, C/C-SiO were investigated by cytotoxicity test, cell direct contact and cell adhesion experiments. Cytotoxicity, cell direct contact and cell adhesion showed that the three materials had no toxic effect on mouse fibroblasts (L929 cells). However, the particles dropped off from the three materials had a great impact on evaluation accuracy of the thiazolyl blue (MTT) test. More the particles were lost, more growth inhibition to L929 cells. The evaluation accuracy of MTT method can be kept with the filtered extract of materials. Furthermore, the results of surface particles shedding experiment showed that the amount of surface particles shed from C/C-SiO was the most, followed by C/C and C/C-SiC in 72 hours. Particles shedding curves showed there was a peak reached at eighth hour and then declined to the thirty-sixth hour. The filtrate analysis showed that there was no ion exchange between the three materials and simulated body fluid (SBF) solution. The results of this study on biocompatibility of carbon-based composites have certain guiding significance for their future application in clinical filed.