Objective To explore the pattern of cognitive impairments mainly caused by the white matter lesions(WML) in the frontal lobe in patients with subcortical ischemic vascular disease (SIVD).Methods Fifty SIVD patients were divided into severe WML group (visual score >3, n=27) and mild WML group(visual score ≤3, n=23) according to their severities of the WML in frontal lobe .Seven patients without SIVD were collected as controls .All patients underwent a set of neuropsychological battery ,and the results were analyzed .Results There was no statistical significance among three groups on basic data .Compared with mild WML group and control group , non frontal white matter scores and numbers of lacunes in frontal lobe of severe WML group were significantly higher ( all P=0.000).Compared with mild WML group,the Montreal cognitive assessment scale in severe WML group were significantly lower ( P=0.047 ) , and scores related to the executive function were significantly lower ( P=0.006 ) , even after adjusting the numbers of lacunes in frontal lobe ,there was statistically significant difference (P=0.038). Multiple regression confirmed that the Z scores of executive functions were mainly affected by white matter lesions located in the frontal lobe ( P=0.000 ) .Conclusion WML located in the frontal lobe mainly affect the executive function in patients with SIVD .

Biomedical Research ; trends ; Biophysics ; trends ; Magnetics ; trends ; Science ; trends

Objective To analyze the surgical treatment options and its results for thoracic and thoracolumbar disc herniation.Methods From June 2004 to December 2009,thirty-one patients of thoracic and thoracolumbar disc herniation with or without ossification of ligament flavum were surgically treated,including 22 males and 9 females,with a mean age of 54 years(range,24 to 71 years).According to Anand and Regan clinical classification,there was type 2 for 1 case,grade 3a for 2,grade 3b for 3,grade 4 for 6,and grade 5 for 19.The neurological status was Frankel B for 2 cases,C for 6,D for 11,and E for 12.Anterior surgeries were performed for 18 patients without ossification of ligament flavum.Anterior decompression was performed through the resection of posterior part of vertebral body,or subtotal resection of vertebral body,followed by strut graft and internal fixation.Posterior surgeries were performed for 13 patients with disc herniation and ossification of ligament flavum.The resection of hemi-articular process and total laminectomy was performed.Results The complications of 18 patients with anterior surgery included laceration of dura mater in 1 case,nerve root sleeve injury in 1 case,intercostal neuralgia in 3 cases,atelectasis in 1 case,and femoroiliac numbness in 2 cases.The complications of 13 patients with posterior surgery included intra-canal hematoma in 1 cases,leakage of cerebrospinal fluid in 2 cases,infection of incision in 1 cases,and pneumonia in 1 case.The patients were followed for 18 months(range,6 to 48 months).At final follow-up,the neurological status and local symptom improved in all patients,with Frankel C for 3 cases,D for 7,and E for 21;and Anand and Regan type 1 for 2 cases,2 for 1,3a for 1,4 for 2,5 for 10 and no symptom for 15.Conclusion For thoracic and thoracolumbar disc herniation,anterior surgery is suitable for patients mainly suffered anterior cord compression.Resection of posterior part of vertebral body or subtotal resection of vertebral body is often needed for sufficient decompression.Posterior surgery is suitable for patients with anterior and posterior cord compression due to ossification of ligament flavum,and the decompression can be obtained by resection of hemi-articular process and total laminectomy.

Objective:To evaluate the performance of paramagnetic particles chemiluminescence microparticle immunoassay ( CMIA) for detection of serum Vitamin B12 ( VitB12 ).Methods: Analysed CMIA system precision, accuracy, anti-interference, analytical measuring range( AMR) ,clinical reportable range ( CRR) and biological reference interval were evaluated,according to the clinical and laboratory standards institude ( CLSI) EP5-A2,EP15-A2,EP7-A2,EP6-A,C28-A3c guidelines.To assess the accuracy,we used the reference material SRM 1955 from national institute of standards and technology ( NIST ) and external quality assessment ( EQA) samples ( LN5-B and K-C) from CAP.Results:The precisions of within-run and between-run were less than standard of manu-facturer when the concentration of VitB12 was 108.84-874.43 pmol/L.The results of SRM1955 met the allowable range of the target val-ue.The results of EQA samples( K-C and LN5-B) also up to the CAP calibration and validation/linear evaluation error limits stipulated standards,and the results through linear verification when the concentration of VitB12 was 89-1 057 pmol/L.The 95% verification interval contains the specified value also.The relative deviation was less than external quality assessment standard from national center for clinical laboratory ( TEa:target value ±25%).Anti-interference evaluation showed without significant interferenc when TG ≤20 mmol/L,Bil ≤300 μmol/L VitC≤1.5 g/L to the VitB12 detection system ( CMIA).AMR validation showed determines the best fit equation was linear equation polynomial.There was the linear relationship when the concentration of VitB12 was 0-1 107 pmol/L.The upper limit of CRR was 110 700 pmol/L,the maximum dilution was 100 times.Biological reference interval validation showed that the overall level of VitB12 in this study reference individuals conform to the standard of manufacturer statement for the population,the overall level of VitB12 in female little higher than male,but no significant differences.Conclusion:Performance of CMIA for detection of serum VitB12 basically met needs of laboratory,which can provide reliable results of VitB12 for laboratory,provide information for the VitB12 status of population in the laboratory evaluation.

In the measurement of the forced oscillation respiratory impedance, we designed a narrow-band second-order band-pass comb filter which is centered at the forced oscillation frequencies for eliminating the interference of spontaneous breathing. The result shows that an increase of signal-to-noise ratio (SNR) reaches 6.0 dB, and keeps it almost constant over the whole frequency band when compared with a conventional high-pass filtering. So we can assess correctly the impedance of respiratory system.

Objective To investigate the effect of different doses valsartan on atherosclerosis in rabbits. Methods 53 white rabbits were randomly divided into control group,cholesterol group,and valsartan group of high-,middle-,and low-dose.The positive expression of pro-oncogene c-myc and c-fos mRNA was studied with in situ reverse transcription-PCR)ISRT-PCR).The histoppathological changes of aorta were observed.Results)1) Positive expression rate of pro-oncogene c-myc and c-fos mRNA was significantly higher in cholesterol than that in the qontrol group.The rate of positive expression was remarkably lower in the high-dose valsartan group than that in the cholesterol group)P

Objective To compare the influence of washing processed of banked suspended red blood cells (RBCs) by cell saver and the influence by zero-balanced ultrafiltration(Z-BUF) on the inflammatory response after cardiopulmonary bypass(CPB) in infants.Methods Sixty infants with ventricular septal defect (VSD) were randomly divided into a control group (group A,20 cases), group B(20 cases)and group C (20 cases).Banked suspended RBCs were washed by cell saver before priming in group B,in group C the banked suspended RBCs were treated with Z-BUF and in group C the banked suspended RBCs were primed directly without any pre-treatment.Samples of the arterial blood were obtained respectively before the start of the CPB (T1), when the CPB stopped(T2) ,2 h after CPB (T3), 12 h after CPB (T4) and 24 h after CPB (T5).The levels of tumor necrosis factor-α (TNF-α), interleukin(IL)-6, IL-8, IL-10 were detected and analyzed comparatively among 3 groups.Results The levels of TNF-α, IL-6, IL-8 ,IL-10 in 3 groups at T2,T3 ,T4 showed a rising trend markedly,and the above four indicators of A,B and C at T4respectivelywere:(110.3±14.0) ×10-9g/L,(90.6±10.3) ×10-gg/L,(103.3±9.7) ×10-9g/L;(54.1 ± 6.5) ×10-9 g/L,(39.3±4.2) ×10-9 g/L, (46.2±5.7) ×10-9 g/L;(96.8 ±9.2) ×10-9 g/L, (82.5 ±6.5) × 10-9 g/L,(88.4±5.1) ×10-9 g/L;(228.4 ±42.9) ×10 9 g/L,(171.5 ±26.4) ×10-9 g/L,(202.9 ±42.8) × 10-9 g/L.The levels of TNF-α and IL-8 in group B and group C were significantly lower than those in group A at T2, T3 ,T4 and T5(all P ＜0.05) ,but there was no significant differences in the levels of IL-6 and IL-10 among 3 groups at T5;the levels ofTNF-α,IL-6,IL-8 ,IL-10 in group B were significantly lower than those in group C at T2,T3 and T4(all P ＜ 0.05).Conclusions Processing of banked suspended pre-RBCs with cell saver and Z-BUF can relieve systemic inflammatory response, and the effect of washing with cell saver is better compared with that of Z-BUF.

Objective To observe the effect of obstructive sleep apnea hypopnea syndrome (OSAHS) on the renal function in patients with type 2 diabetes mellitus (T2DM).Methods Sleep apnea hypopnea index (AHI), oxygen desaturation index (ODI), and nighttime lowest oxygen saturation (LSaO2) were evaluated in 298 patients with T2DM using a portable sleep apnea monitor.Patients were divided into T2DM without OSAHS group (n=120) and with OSAHS group (n=178) according to AHI<5.Patients were divided into 3 groups according to estimated glomerular filtration rate (eGFR): eGFR>90 ml·min-1·(1.73 m2)-1 (n=190), 90>eGFR>60 ml·min-1·(1.73 m2)-1 (n=84), eGFR<60 ml·min-1·(1.73 m2)-1 (n=24).The influencing factors of eGFR and AHI were analyzed by logistic regression analysis.Results There were significant differences in eGFR, uric acid (UA), high density lipoprotein-cholesterol (HDL-C), waist circumference, hip circumference, body mass index (BMI), and urinary albumin between T2DM without OSAHS and with OSAHS groups(all P<0.05).eGFR showed a significant correlation with AHI(r=-0.154, P=0.008), ODI(r=-0.236,P<0.01),and LSaO2(r=0.145, P=0.024).Logistic regression revealed that eGFR(OR=0.991, 95%CI 0.983~0.998, P=0.014), BMI(OR=1.107, 95%CI 1.028~1.193, P=0.008)were independent risk factors for AHI.There were significant differences in age, urinary albumin, AHI, ODI, LSaO2 among groups with various eGFR levels (P<0.05).Stepwise regression showed that age(β=-0.456, 95%CI-0.571~-0.346,P<0.01)and AHI(β=-0.119, 95%CI-0.226~-0.007,P=0.037) were independent risk factors for eGFR.Conclusions OSAHS is a risk factor for renal impairment in patients with T2DM.

BACKGROUND:The previous literatures have reported that the aneurysmal bone cyst has a high recurrence rate after curettage treatment.
OBJECTIVE:To investigate the effect of less invasive stabilization system plate fixation combined with bone cement in the treatment of distal femoral aneurysmal bone cyst.
METHODS:A retrospective analysis was conducted in 19 patients with distal femoral aneurysmal bone cyst who treated with less invasive stabilization system plate fixation combined with bone cement in the First Hospital of Qinhuangdao between January 2002 and January 2012. The purpose of the treatment of aneurysmal bone cyst was to completely remove the cyst and prevent recurrence, and to repair and reconstruct the structure and function of the damaged tissues through implant fixation.
RESUTLS AND CONCLUSION:The 19 patients were fol owed-up for 1-3 years after treated with less invasive stabilization system plate fixation combined with bone cement, and 18 cases recovered wel , one case had recurrence at 2 years after treatment. Complete removal of aneurysmal bone cyst is the key for the prevention of recurrence. The less invasive stabilization system plate is the combination of advantages of intramedul ary nail and the biological locking plate technology, which has many advantages in the treatment of aneurysmal bone cyst. Fil ing the lesion area with bone cement had certain kil ing effect on tumor, and can increase the bone strength in the lesion area. The surgical treatment of distal femoral aneurysmal bone cyst is to clear the cystic lesions firstly, and then to prevent the recurrence through less invasive stabilization system plate fixation combined with bone cement.

Objective To study the initial application of 3.0T high field intensity intraoperative magnetic resonance(iMR)for cranial tumors.Methods Forty-three patients with cranial tumors including 23 glioma cases,12 pituitary tumor cases,3 brain stem cavernous hemangioma cases,2 meningioma cases,2metastatic tumor cases,1 neurilemmoma case,received operation examined with GE Signa HDX 3.0T iMR system.The operation process and influence of iMR were reviewed.Results In 43 patients,average iMR examination was 1.3(1-3)times.In 16 patients the first iMR examination revealed tumor remnants,and in 13 of them continued surgical interventions and complete resection.The rate of complete resection was increased from 63％(27/43)to 93％(40/43).No complications related to iMR occurred.Conclusion 3.0T high field intensity iMR can provide accurate positioning and real-time navigation for the surgery,increase the rate of complete resection,improve the accuracy and safety of cranial tumor resection,and decrease complications.