Objective To summarize the CT signs and clinic characteristics to improve the CT diagnoses ability on the lobar bronchial intraluminal cancer and provide a well comprehension for it.Methods To study the clinical symptom and CT presentation in 7 cases with the lobar bronchial intraluminal cancer which had been confirmed by bronchoscopy and pathologic exam.Results 3 cases were in right superior lobaris bronchus,1 case in right middle lobaris bronchus,3 cases in left superior lobaris bronchus.Obstructive pneumonia were found in 7 cases.Obstructive atelestasis in 5 cases.The nodules or emboluses within lobaris bronchus were showed by CT in all cases and the obstructive signs on each patient in its degrees. Conclusion To get the CT diagnosis of the lobar bronchial cancer is easily be delayed. But if pay attention and keep it a close combination with clinic, the early diagnosis will be attained on time.

Motion segment and extraction from continuous signals is the premise of surface electromyography (sEMG) analysis. For the problem that sEMG energy threshold required repeated manual testing to set, this the paper established a this mathematical model of continuous actions based on Gaussian sEMG energy curve, in which the energy threshold was set according to the distribution of Gaussian signal section, and differentiated the action signals from no-action signals combined with energy comparison method. The experiment results showed the method can achieve continuous repetitive action segmentation, and compared with manual segmentation of the same signal, has a higher degree of coincidence.
Algorithms ; Electromyography ; Humans ; Motion ; Pattern Recognition, Automated ; Signal Processing, Computer-Assisted

Endoproteinase Lys-C/trypsin sequential digestion and trypsin digestion were used in 293 T cell proteomics sample preparation and the results of Lys-C/trypsin sequential digestion and trypsin digestion in proteomics sample preparation was systematically evaluated. It was found that the number of identified peptides and proteins increased significantly, and missed cleavage sites, especially K sites decreased dramatically through Lys-C/trypsin sequential digestion. And the average sequence coverage of identified proteins in Lys-C/trypsin sequential digestion sample was higher than that in trypsin digestion sample. Besides, different amount of enzymes was tested to select the optimal usage of enzymes in Lys-C/trypsin sequential digestion. This study provided the references for proteomics sample preparation.

Objective:To explore the involvement of endoplasmic reticulum molecular chaperone GRP78 in the impairment of inner ear consistented with the mimetic aging model.Method:Twenty-four Wistar rats were randomly divided into two groups. model group was in duced by daily hypodermic injection of 10% D-galactose (800 mg·kg~(-1)·d~(-1)) for 8 weeks and the control group was given saline accordingly. Spatial learning and memory was measured by Morris-Water-Maze. Colorimetry was used to analyze superoxide dismutase (SOD) and malondialdehyde (MDA) extracted from inner ear tissue. Hearing threshold of rats were detected with Auditory brainstem response (ABR).In addition, expression of GRP78 in the inner ear was detected by immunohistochemistry,RT-PCR and Western blot. The control group was studied parallel.Result:The escape latency in the model group injected with D-galactose was markedly longer than that in the control group.accordingly ,the changes of SOD and MDA were more significant in the model group, the difference between two groups was significant(t-test,P<0.01). the variation of ABR in two groups was observed, There was no statistically difference of the hearing in the model group compared with the control group(P>0.05). The expression of GRP78 was significantly different between two groups ,which is increased in the inner ear tissue of model group(P<0.01).Conclusion:The impairment of inner ear tissue partly dued to the oxidative stress in the model, which was induced by D-galactose.and endoplasmic reticulum molecular chaperone was thought to contribute to the impairment mechanism of inner ear in mimetic aging model.

p75 neurotrophin receptor (p75 NTR) is a member of the tumor necrosis factor receptor superfamily, which interacts with tropomyosin receptor kinase (Trk) receptor or binds neurotrophic factors. It mediates a variety of complex signal transduction pathways, induces synaptic growth and affects cell survival. After acute cerebral ischemia, p75 NTR binds effector factors such as pro-nerve growth factor (proNGF) and sortilin, activating downstream apoptotic signal molecules and leading to neuronal death. Therefore, elucidating the pathways and molecular mechanisms of p75 NTR that mediate neuronal apoptosis in acute cerebral ischemia is of great significance for the development of new therapeutic drugs for acute cerebral ischemia.

Objective To observe the characteristics of the full-field flash electroretinogram (F-ERG) in rats with oxygen induced retinopathy (OIR).Methods Twenty-four neonatal Sprague Dawley rats were divided into OIR group and control group.In OIR group,12 rats were exposed to (75 ± 2)％ oxygen for 7 days and then to room air for 7 days;in control group,12 rats were raised in room air for 14 days.At postnatal day 21,F-ERG tests were performed to examine the rod response,the maximum mixing reaction and the cone reaction.Results Compared with the control group,the b-wave amplitudes decreased (t=3.650) and the implicit times increased (t=2.410) in rod response in OIR group,the differences were statistically significant (P＜ 0.05);the a-and b-wave amplitudes decreased (t=3.333,2.562) and the implicit times increased (t=2.725,2.482) in the maximum mixing reaction in OIR group,the differences were statistically significant (P＜0.05).There was no difference between OIR and control group on a-and b-wave amplitudes (t=0.650,0.204) and implicit times (t=0.422,0.076) in cone response (P＞0.05).0.001 cd.s/m2 light intensity stimulation on rats F-ERG wave almost no response.0.010 cd.s/m2 light intensity stimulation on rats can be recorded to the rod response waveform,with the increase of light intensity,the amplitude of b-wave increases,the a-wave extraction.Conclusions F-ERG of OIR rat showed that the amplitude and sensitivity of the rod response and maximal rodcone response was decreased.The intensity of light had effect on the OIR rod cells,and the amplitude of b-wave increased with the increase of light intensity,the a-wave extraction.

We described an elderly female with type 2 diabetes referred to our hospital with fever,nausea and upper abdominal pain.The patient had got duodenal tumor and received the pancreaticoduodenectomy (PD) 12 years ago.The laboratory examinations revealed white blood cells (WBC) increasing and severe hypocalcemia.Abdominal computed tomography (CT) revealed a huge gas-forming pyogenic liver abscess (PLA) in left lobe of the liver.The patient got cured after correction of calcium metabolism disorders,treatment with antibiotic and receiving percutaneous tube drainage.We concluded that we should remain on high alert of those patients with DM and the history of cancer,when he or she gets fever of unknown origin and abdominal tenderness.PLA should be considered.

Objective To evaluate the practicability of CHROMagar orientation medium combined with simple biochemical tests for identification of common oxidase-negtive gram-negative bacilli.Methods The CHROMagar orientation medium was used together with biochemical tests including indole test , ornithine decarboxylase test and lysine decarboxylase test for identification of common oxidase -negtive gram-negative bacilli.The sensitivity, specificity, likelihood ratio, Youden index and Kappa value of the diagnostic assays were evaluated .McNemar test was performed to evaluate facticity, accuracy and cost of the method in com-parison with the Vitek-2 system as reference method .Results The identification of oxidase-negtive gram-negative bacilli from 318 bacterial strains showed that the sensitivities and specificities of CHROMagar orien-tation mediumm in combination with simple biochemical tests to Serratia marcescens, Stenotrophomonas mal-tophilia and Acinetobacter baumannii reached 100%, and for Escherichia coli, Enterobacter aerogenes and Klebsiella pneumoiae were above 90%.The specificities for identification of Enterobacter cloacae, Klebsiella oxytoca, Citrobacter freundii and Proteus mirabilis were all above 90%, but the sensitivities were around 75%-90%.Kappa values of the assays were above 0.85, howerer, which was only 0.5947 for Citrobacter freundii.McNemar test showed that all P values were above 0.05, and cost of the assays was reduced by 90%.Conclusion CHROMagar orientation medium in combination with simple biochemical tests is a cost-effective assay for identification of common oxidase-negtive gram-negative bacilli .

Objective To observe the characteristic of precancerous lesions and early gastric carcinoma with narrow belt imaging technology. Methods The 74 patients were enrolled in this study. The same case was used as self-control. The operation was made in pain-less under anesthesia. When the mirror was advanced to the duodenal descending segment, an ordinary microscope mode was used and the mirror was back to Mallory, the lesions found were recorded, the image was zoomed in with low-fold and observed (1.4,1.6,1.8 times). Suspicious lesions were collected and biopsies were made. Results Chronic gastritis could be commonly found in type A and AB. Mild in-testinalization and mild atypical hyperplasia could be commonly found in mixed type holding type C, type BC and AB. Moderate atypical hy-perplasia could be found in type CD and AC, and heavy atypical hyperplasia in type CD and D. Early gastric cancers (superficial depressed) were seen in type BC and irregular thick type A. Advanced gastric cancers were in type CD, D and C. Helicobacter pylori infection were common in type A and B. Protruded type, sunken type were not easily missed with common endoscopic and NBI. But "for ordinary focus of infection, it was easily missed with common endoscopic, while less with NBI. Conclusion NBI is a simple and safe method, which can be used to find precancerous lesions and early gastric cancer lesions more easily. It will enlaance the diagnosis rate of precancerous lesions and early gastric cancer as positive rate of biopsy was markedly improved.

Objective To investigate the accuracy of the plasma DNA concentration in evaluating the prognosis in patients with sepsis.Methods One hundred and sixty patients with sepsis were enrolled as the sepsis group (group SE).Another 109 patients without sepsis hospitalized during the same period served as the control group (group C).The venous blood sample was taken on admission for determination of plasma DNA concentration by polymerase chain reaction,C reactive protein (CRP) concentration by ELISA.APACHE Ⅱ score and SOFA score were evaluated at 24 h after admission.The 160 patients with sepsis were divided into two groups according to the result of prognosis:survival group ( n =103) and death group ( n =57).Results Compared with group C,the plasma DNA concentration,CRP concentration,APACHE Ⅱ score and SOFA score were significantly increased in group SE (P＜0.05).Compared with survival group,the plasma DNA concentration,APACHEⅡ score and SOFA score were significantly increased in death group ( P ＜ 0.05).The areas under receiver operating characteristic (ROC) curves of the plasma DNA concentration was significantly larger than those of APACHE Ⅱ score and SOFA score (0.81(95％ CI,0.74-0.88) versus 0.68(95％ CI,0.60-0.77),or 0.72(95％ CI,0.63-0.82)).Conclusion The plasma DNA concentration can accurately evaluate the prognosis in patients with sepsis.As compared with the plasma CRP concentration,APACHE Ⅱ score and SOFA score,the plasma DNA concentration is more accurate to evaluate the prognosis in patients with sepsis.