Electrocardiogram (ECG) signals are susceptible to be disturbed by 50 Hz power line interference (PLI) in the process of acquisition and conversion. This paper, therefore, proposes a novel PLI removal algorithm based on morphological component analysis (MCA) and ensemble empirical mode decomposition (EEMD). Firstly, according to the morphological differences in ECG waveform characteristics, the noisy ECG signal was decomposed into the mutated component, the smooth component and the residual component by MCA. Secondly, intrinsic mode functions (IMF) of PLI was filtered. The noise suppression rate (NSR) and the signal distortion ratio (SDR) were used to evaluate the effect of de-noising algorithm. Finally, the ECG signals were re-constructed. Based on the experimental comparison, it was concluded that the proposed algorithm had better filtering functions than the improved Levkov algorithm, because it could not only effectively filter the PLI, but also have smaller SDR value.
Algorithms ; Electrocardiography ; Humans

Metabolic engineering provide powerful tools for the systematic manipulation of cellular metabolic activities. The ptsG gene for glucose-specific transporter Enzyme II CBGlc of the phosphotransferase system was knock-out so as to reduce the accumulation of acetic acid in the high cell-density culture of Escherichia coli on excess glucose. The chloramphenicol-resistant cassette with short shared sequences on both ends generated by PCR was electroporated into Escherichia coli DH5alpha and JM109. Recombination between linear DNA cassettes and Escherichia coli chromosomes took place by Red recombinase functions. Therefore, the ptsG gene was disrupted to construct the mutants called DH5alphaP and JM109P. There was no difference between the mutants and parent strains in LB media.However, in LB media supplemented with glucose, the mutants of Escherichia coli deficient in ptsG showed greater biomass, together with exploiting more glucose. The maximal cell density obtained with DH5alphaP was approximately 3 times more than that of DH5alpha, then the result of JM109P increased fourfold. The products of recombinant protein TNF respectively accounted for 24.3% of total cellular protein in DH5alphaP with A600 8.28 and 20.8% of total cellular protein in JM109P with A600 7.62. The specific volume expression amount of TNF was greater in the ptsG mutant than in its parent strain. These results demonstrate that the ptsG-mutant strains will be available for high cell-density culture.
Culture Media ; Escherichia coli ; genetics ; growth & development ; Fermentation ; Mutation ; Phosphoenolpyruvate Sugar Phosphotransferase System ; genetics ; Polymerase Chain Reaction ; Recombinant Proteins ; biosynthesis ; Tumor Necrosis Factor-alpha ; biosynthesis

Carcinoma, Hepatocellular ; metabolism ; pathology ; Hep G2 Cells ; Humans ; Interleukin-6 ; metabolism ; Liver Neoplasms ; metabolism ; pathology

Objective To explore the preliminary evaluation of transesophageal echocardiography in percutaneous edge-to-edge repair of mitral regurgitation.Methods Ten consecutive patients were treated with percutaneous edge-to-edge repair of mitral regurgitation using the MitraClip system.All of them had moderate-severe (n =1) or severe (n =9) central MR and high operative risk.MitraClip implantation performed under echocardiographic and fluoroscopic guidance in general anaesthesia.Preoperative and postoperative immediate echocardiographic data were prospectively collected.Results All operations succeed with one MitraClip implanted to 5 patients and two MitraClips implanted to 5 patients.Postoperative immediate echocardiography observed MR reduction,6 cases to mild,2 cases to mild-to-moderate and 2 cases to moderate.No complications occurred in all patients,such as Clip off,pericardial effusion/tamponade,or mitral valve damage.Conclusions Echocardiography guarentees the success of MitraClip based transcatheter mitral valve repair operations with safety and effectiveness.

Objective To analyze mutations in the PTCH1 gene in a pedigree with nevoid basal cell carcinoma syndrome (NBCCS).Methods Blood samples were collected from a 58-year-old male proband with NBCCS (Ⅱ 5),his brothers (Ⅱ 1 and Ⅱ 3) and son (Ⅲ4),and 50 unrelated healthy human controls.DNA was extracted from these blood samples.PCR and direct DNA sequencing were performed to determine mutation sites in the PTCH1 gene.According to the mutation sites,allele-specific oligonucleotide primers were designed and used to confirm the pathogenic mutations in this pedigree through PCR.Results A nonsense mutation (c.2137C),which leads to the substitution of CAG by TAG with the generation of a premature termination codon (Q714X),was identified in exon 14 in one allele of the PTCH1 gene in the proband and his son,but in none of the healthy human controls.Conclusion The nonsense mutation (c.2137C ＞ T) in the PTCH1 gene may be a specific mutation causing the clinical symptoms in the patient with NBCCS.

Objective:To analyze morphological character of lateral tibial plateau fracture fragment, and its correlation to the presence of a meniscus injury in tibial plateau fractures.Methods:A total of 79 consecutive patients of the simple lateral tibial plateau fractures from July 201 1 to July 2015 were inclu-ded in this study,with 65 males and 14 females with an average age of (34.3 ±7.2)years and 22-61 years.According to Schatzker classification,21 cases were of Type Ⅰ,41 cases Type Ⅱ,and 17 cases Type Ⅲ.The characteristics of lateral tibial plateau fractures were evaluated by plain X-ray and magnetic resonance imaging (MRI ).The type and severity of meniscus injury were diagnosed by MRI scan. Three-dimensional measurements of the lateral fragment width (LFW),the lateral plateau depression (LPD),the coronal angulation of lateral fragment (CALF),and tibial plateau widening (TPW)were measured with Picture Archiving and Communication Systems(PACS)software.The patients with and without meniscus injuries were divided into different groups and analyzed respectively.Comparison of the above measurements between the two groups was analyzed by independent t test.Results:In all the 79 lateral tibial plateau fracture patients,26 cases (32.9%)of meniscus injuries were detected by MRI. Among all the meniscus injury cases,3 were of SchatzkerⅠ,16 SchatzkerⅡ,and 7 SchatzkerⅢ.In meniscus intact group,the average LFW was (22.0 ±2.8)mm while in meniscus injury group it was (21.3 ±3.3)mm (t =-1.008,P =0.317).The average LPD of non meniscus injury group was (5.4 ±2.8)mm,while in meniscus injury group was (8.7 ±2.8)mm (t=4.98,P=0.001).The average CALF of the two groups were 9.1°±6.1°and 10.6°±7.1°,and there was no significant dif-ference between the two groups (t=0.38,P=0.831).The average TPW was (3.0 ±1.1)mm,and (4.8 ±1 .7 )mm of the two groups.There were significant differences between the two groups (t =5.216,P=0.001).Conclusion:There was no obvious correlation between the LFD and meniscus inju-ry.The CALF of lateral tibial plateau fracture had no significant correlation with meniscus injury either. The degree of LPD and TPW may indicate injury of the meniscus in tibial plateau fractures.

A surgical technique of lateral crus strut graft to correct the deformity of nostril contour and improve asymmetric nostril shape by autologous rib cartilage was reported. Thirty-five patients (20 males and 15 females), with a mean age of 19 years (range of 16-26 years) were included in this study. All of the patients suffered moderate to severe unilateral cleft lip nostril deformity and underwent surgical technique of lateral crus strut graft by autologous rib cartilage to correct the asymmetric nostril contour from 2010 to 2012. The views of the nostril contour on both sides were reviewed and some parameters were measured at different time points (preoperatively, and 3 months and one year postoperatively) including the long axis and short axis of the nostrils. The differences in nostrils including long axis, short axis, elliptical area and eccentricity on the both sides were compared at different time points. The differences in the long axis and eccentricity of the nostrils on the two sides were decreased significantly between the preoperative view and postoperative view (P<0.05). The surgical technique of lateral crus graft with autologous rib cartilage is effective to correct the abnormal nostril contour and improve the asymmetry for unilateral cleft clip patients.

Objective To investigate the application value of Calot triangle hollowing-out maneuver in laparoscopic cholecystectomy (LC) for preventing bile duct injury.Methods The retrospective cross-sectional study was conducted.The clinical data of 537 patients who underwent LC in the Dexing People's Hospital between January 2011 and December 2015 were collected.The tissues in Calot triangle were hollowed out,and cystic ducts were cut off and then gall bladders were resected.Observation indicators:(1) operation situations:anatomy of the Calot triangle and operation time;(2) postoperative recovery situations:postoperative complications and bile duct injury;(3) follow-up situation.The follow-up using outpatient examination and telephone interview was performed to detect the survival of patients and occurrence of cholangitis up to May 2016.Results (1) Operation situations:of 537 patients with LC,anatomical relation among cystic duct,common hepatic duct and common bile duct (three-duct relation for short) could be seen in 165 patients without dissection,and three-duct relation cannot be seen in other 372 patients.Of 372 patients,16 were operated on with the gallbladder open due to the difficult dissection of Calot triangle,7 were converted to open surgery due to local severe adhesion and unclear structure,1 was converted to open surgery due to intraoperative varices induced bleeding in Calot triangle,and other 348 patients underwent successful LC using Calot triangle hollowing-out maneuver.Operation time was 15-190 minutes,with an average time of 28 minutes.(2) Postoperative situations:2 patients were complicated with biliary colic pain,showing stones in the distal common bile duct via magnetic resonance imaging scans,and then received endoscopic sphincterotomy (EST);3 had subxyphoid puncture hole infection,1 had a small amount of postoperative bleeding due to hepatocirrhosis,3 had pulmonary infection,and they were improved by symptomatic treatment;1 had chylous fistula and were improved through drainage and low fat diet intake for 1 week;2 with mild bile leakage was improved through peritoneal drainage.No bile duct injury was detected.(3) Follow-up situation:348 patients were followed up for 12-18 months,with a median time of 16 months.During the followup,348 patients with follow-up had survival without manifestation of cholangitis.Conclusion Calot triangle hollowing-out maneuver could effectively prevent bile duct injury in LC.

Objective To analysis effect of Bifidobacterium tetravaccine tablets ( live ) combined with cefixime on C-reactive protein, ceruloplasmin, haptoglobin and α1-acid glycoprotein in patients with Bacterial enteritis.Methods 58 patients who were diagnosed with Bacterial enteritis were collected.All patients were randomly divided into experimental group and control group, 29 cases in each group, On the basis of conventional treatment, the control group was treated with cefixime, and the experimental group was treated with Bifidobacterium tetravaccine tablets ( live) on the basis of control group.After treatment, the serum levels of CRP, CER, HPT, AAG and clinical curative effect were detected in all patients.Results After treatment, CRP, CER, HPT, AAG levels were lower than before treatment (P<0.05),compared with control group, CRP, CER, HPT, AAG levels were lower than in the experimental group( P<0.05);the total effective rate was higher in the experimental group (χ2 =4.35, P<0.05).Conclusion Bifidobacterium tetravaccine tablets(live) combined with cefixime can significantly reduce the serum CRP, CER, HPT, AAG levels in patients with bacteria enteritis, improve the clinical efficacy, have guidance significance for clinic.

Objective To detect the tbymidine pbospborylnse (TP) expression in metastatic liver cancer tissues from human colorectal cancer by immunohistochemistry, and analyze the correlation between TP ex-pression and the tumor-associated macrophages (TAM), and the prognosis of patients. Methods Twenty-eight metastatic liver cancer specimens resected from patients with colorectsl cancer, were immunohistochem-ically stained by 654-1, an anti-TP monoclonal antibody, IC6-203, another anti-TP monoclonal antibody, PG-M1, anti-macrophage marker CD68 monoclonal antibody. Morphometrical analysis and positive cell counting were performed, and the correlation of TP expression with the patient's prognosis was evaluated. Results In normal liver tissues, the hepatic cells apart from cancer nests were weakly positive for 654-1 as well as for 1C6-203. The most TP-positive cells were distributed mainly along the invasive margin of cancer or around the cancer nests. In the corresponding areas, CD68-positive macrophages were also increased. The distribution patterns of CD68-positive cells were similar to those of TP-pesitive cells. The numbers of the TP-positive cells stained by 654-1 were significantly correlated with numbers of 1C6-203 positive cells (r=0.697, P<0.01), also correlated with the numbors of CD68-positive cells (r=0.703, P<0.01). While the numbers of 1C6-203 positive cells had no significant differences with the numbers of CD68-positive cells (r=0.359, P>0.05). The TP-pesitive cancer cells both for 654-1 and for 1C6-203 were detected only in 2 of 28 specimens. Both the number of TP-pesitive cells for 654-1 and 1C6-203, and the number of CD68-positive cells had no correlation with the survival period of patients. Conclusions In the metastatic liver cancer tissues of human colorectsl cancer, the TP-expreasinn stained by 654-1 was coincidence with 1C6-203, and the most important source of TP-expreasion is the TAM in stromal tissues around cancer nests, while the cancer cells are little expressed. The numbers of TP-positive cells stained by 654-1 are significantly related with CD68-pesitive macrophages, but not with the post-operation survival period of patients.