Electrocardiography ; methods ; Heart Conduction System ; physiopathology ; Heart Diseases ; diagnosis ; Humans

Objective To explore the molecular pathological mechanism and treatment of retinoic acid syndrome(RAS).Methods SDF-1? of health adult lung was measured by RT-PCR,CXCR4 on the cell membrane of APL specialized by arsenic trioxide(APL/ATO)were tested by FCM,and we used the rotary cell culture system(RCCS)to build the model of simulated experiment in vitro of APL/ATO infiltrating into the human lung;observe if Dex,Ara-C and DNR can influence the ability of APL/ATO in adhesion,transplantation and infiltration.Results The APL/ATO could evidently infiltrate into human lung,mean fluorescence intensity(MFI)of CXCR4 on the cell membrane of APL/ATO was 28.77?1.05,which was much higher than the unspecialized APL(9.20?4.14).Contrast to control cells,Dex could dramatically restrain the ability of APL/ATO in adhesion and transference [(29.91?2.70)% vs(48.20?5.00)%,30.01?5.01 vs 60.10?3.02],while Ara-C and DNR could distinctly depress the ability of APL/ATO in adhesion,transplantation and infiltration[(30.10?3.00)%﹑(32.20?2.20)% vs(48.20?5.00)%;28.01?5.00,24.02?4.01 vs 60.10?3.02;18.20?3.56,16.01?3.25 vs 46.01?4.05].Conclusion High expression of CXCR4 on APL/ATO and SDF-1?in the lung may be one of the molecular mechanism of the lung infiltration and RAS;DEX、Ara-C and DNR can restrain the ability of APL/ATO in adhesion,transplantation and infiltration.

Objective To investigate the antibiotic resistance, virulence genes, and sequence types of Enterococcus faecium ( E. faecium) strains isolated from children under 3 years old in Sui county, Henan province. Methods Kirby-Bauer antibiotic testing was performed to analyze the antibiotic sensitivi-ties of E. faecium strains to 15 common antibiotics. PCR analysis was used to detect the virulence genes car-ried by the E. faecium strains. Multilocus sequence typing ( MLST) was performed for the typing of E. faeci-um strains. Results Forty-seven E. faecium strains were isolated from 120 stool samples collected from chil-dren under 3 years old in Sui county, Henan province, of which 95. 7% were antibiotic-resistant strains. Most of the isolated E. faecium strains were resistant to rifampicin, accounting for 91. 5% (43/47) of all isolates, followed by those resistant to erythromycin and tetracycline, which accounted for 68. 1% (32/47). Moreover, high resistance rates to those antibiotics commonly used in clinical treatments of E. faecium infec-tion including β-lactam and aminoglycosides antibiotics were observed. Those strains resistant to more than three kinds of antibiotics belonged to the same clonal complex including 12 strains of clonal complex 17 ( CC17) harboring the virulence gene of hyl. All of the isolated E. faecium strains were susceptible to vanco-mycin, linezolid, chloromycetin and nitrofurantoin. Conclusion The E. faecium strains isolated from chil-dren under 3 years old in Sui county, Henan province were multi-antibiotic resistant. There were drug-resist-ance strains belonging to the CC17 and carrying the virulence gene of hyl.

Objective To explore the changes of atrial natriuretic peptide(ANP)and parathyroid hormone(PTH)in umbilical cord blood of newborn infants with intrauterine growth retardation(IUGR)and their relationships with electrolytic.Methods A total of 71 IUGR infants borned between Jan.2006 and Aug.2007 were enrolled in this study.Another 40 normal appropriate for gestational age neonates were selected as control group.The study group were divided into 2 groups:mature IUGR group(n=29)and premature IUGR group(n=42).The samples of umbilical cord blood of every group were collected at the time of delivery,and ANP,PTH levels in umbilical cord blood were mea-sured by radioimmunoassay.The sodium,calcium levels in their peripheral vein were measured simultaneously.Results 1.Compared with control group[(0.78?0.42)?g/L],the ANP levels of premature IUGR group[(1.26?0.47)?g/L] and the mature IUGR group[(1.09?0.51)?g/L] were significantly increased(t=5.98,2.76 Pa0.05).The calcium levels of the premature IUGR group[(1.85?0.37)mmol/L]significantly decreased(t=1.93 P0.05)compared with control group [(2.02?0.44)mmol/L].3.The serum sodium level was negatively correlated with the umbilical ANP level(r=-0.93 P

Objective To explore a new training method of nursing skills under 24 hours shift system in the practical training base in the college. Methods The practical training base in the college was rebuilt into a simulated hospital. 120 three-year-course nursing students in grade 2007 were divided into the control class and the experimental class with 60 students in each class. The control class adopted routine teaching method, including teacher demonstration, single project training, concentrated training before clinical practice. The experimental class participated in the tutoring mode of nursing skills under 24 hours shift system in simulated hospital. The cases were pre-designed and students acted as patients by tums. One teacher led 4 students into nursing skill training by day shift, evening shift and mid-night shift. The teaching effect was compared between two classes. Results There was significant difference between the two groups in comprehensive technique test and graduation theoretical test score. Clinical nursing teachers thought the skill training in simulated hospital under 24 hours shift system can help students prepare for the nursing work in hospital ahead of time and improve their comprehensive capability. Conclusions Training mode of nursing skills in simulated hospital under 24 hours shift system is feasible for enhancing nursing skills.

Objective To investigate the influence of high-voltage electrical burn on the throm-bomodulin (TM), protein C (PC), protein S (PS) and D-Dimer (D-D) in SD rats. Methods One hundred and twenty healthy SD rats were divided into the fake high-voltage electrical burn groups (FHEB), high-voltage electrical burn groups (HEB) according to the random number table, with 60 rats in each group. Ten rats were taken from each group at 15 minutes before injury. Plasma were collected from heart blood. Fifty SD rats of HEB group with voltage regulator and experimental transformer. The remaining fifty SD rats of FHEB group were sham injured with the same devices without electric current. At 5 minutes and 1, 2, 4, 8 hour (s) post injury, 10 rats of every group were randomly chosen at each time point for observation of the concentrations of TM, PC, PS and D-D. Plasma were collected from heart blood. Data were processed with analysis of variance of factorial design and LSD test. Results Compared with the FHEB group, the concentration of TM from 5 minutes to 8 hours post injury in HEB group was higher significantly (P < 0.05). Exception of the concentrations of PC and PS at 15 minutes before injury, the concentrations of PC and PS were lower than those of FHEB group (P < 0.05). The concentration of D-D in HEB group peaked at 8 hours post injury in (173.05 ± 4.08) ng/mL. Conclusion High-voltage electrical burn at early stage can increase the concentrations of TM, D-D, as well as decrease the concentrations of PC and PS, which are not only causing the vascular endothelium damage but also possessing serious effect on the thromboplastin function of SD rats.

Objective To master the rehabilitation in patients with traumatic brain injury in Eastern China, and provide evidence for clinicians to rehabilitate early,correctly and effectively.Methods All sampling of the TBI patients from 80 hospitals in Eastern China were clustered and were analyzed using SPSS 13.0.Results The rate of in -patients in Eastern China with early rehabilitative intervention was 4.68%,and the rate of male was higher than female(male to female ratio was 3.80:1),mean age was (40.10 ±16.33)years old,but there was no difference in gender(χ2 =3.23,P =0.072)and age(t =-0.819,P =0.413)for the early rehabilitative intervention.Local resi-dent patients in early rehabilitative intervention was lower(χ2 =8.28,P <0.05).The average length of stay for the early rehabilitative intervention patients was(39.57 ±34.22)d(t =-17.74,P <0.05),the average cost of hospitali-zation was(42 741.50 ±43 186.69)yuan(t =-18.96,P <0.05).The rate of average length of stay and average cost of hospitalization of the rehabilitative intervention patients were higher and more expensive than the patients who did not obtain early rehabilitative intervention,but did have higher unfavourable prognosis rate(χ2 =85.45,P <0.05). Conclusion We advocate correct and early rehabilitative intervention for traumatic brain injury in patients with different degree,and promote not only the physical and functional rehabilitation,but also comprehensive rehabilitation such as the psychological treatment,family treatment and social regression.

Objective To investigate the MR characteristics of ulnar nerve and muscles in cubital tunnel syndrome.Methods Twenty eight patients with cubital tunnel syndrome and 28 asymptomatic volunteers underwent MR imaging,MR neurography was performed by using an isotropic three dimensions T2 sampling perfection with application optimized contrasts using different flip angle evolutions (3D T2 SPACE)on 15 patients with cubital tunnel syndrome.To evaluate changes in T2 signal intensity of the ulnar nerve,regions of interest were placed in the center of the location of the highest apparent ulnar nerve signal intensity on the axial FS T2WI images and in normal muscle within the same image slice,and the ratio of signal intensity was calculated.The sensitivity of 3D T2 SPACE sequence in detecting cubital tunnel syndrome was determined.The standard t tests were used to assess whether ulnar nerve size and relative signal intensity in symptomatic patients were statistically different from normal volunteers.Results The cross-sectional area of ulnar nerve in 24 patients and 2 volunteers was enlarged,the signal intensity of ulnar nerve in 26 patients and 16 volunteers was increased.Increased signal and muscle atrophy adjacent to the ulnar nerve were detected in 4 patients.Cubital tunnel syndrome was detected in 14 patientson 3D T2 SPACE sequence.The mean ulnar nerve sizes in the symptomatic and normal group were (0.15±0.06)and (0.06±0.01)cm2 respectively,the mean relative signal intensities in the symptomatic and normal groups were (2.86± 1.45) and 1.57±0.39 respectively (t values were 2.220 and 4.546,P＜0.05).Conclusions Ulnar nerve size and T2 signal intensity were increased,in patients with cubital tunnel syndrome.In addition,muscles innervated by the ulnar nerve showed atrophy with increased T2 signal intensity.

Objective To identify the relationship among serum 25-hydroxyvitamin D[25(OH)D] level, chronic inflammation state and malnutrition in maintenance hemodialysis (MHD) patients. Methods The serum 25 (OH)D level of 119 patients on MHD was detected. All the patients were divided into three groups according to the serum 25(OH)D level. Vitamin D deficiency: 25(OH)D ≤ 15 ng/mL, vitamin D insufficiency: 15 ng/mL <25(OH)D ≤ 30 ng/mL, vitamin D normal: 25(OH)D > 30 ng/mL. Inflammatory factor and nutritive index were compared among the three groups. Result The average of serum 25 (OH)D level was 3.4~45.3 ng/mL (22.5~14.8 ng/mL), and the prevalence of 25 (OH)D deficiency and insufficiency was 88.2%. Significant differences existed in age, inflammatory factor (IL-6, TNF-α, CRP) and nutritive index (Alb, PA, SGA) between 25(OH)D deficiency, insufficiency groups and normal group (P<0.05). Conclusion The serum 25(OH)D level is possibly related to the malnutrition in MHD patients. It may inhibit chronic inflammation state , in which it can promote state of nutrition of MHD patients.

To improve the solubility of quercetin ( QT) , one of flavonoids that can inhibit the proliferation of vari-ous types of cancer cells, the novel amphiphilic polymer N-( 4-methylimidazole)-hydroxyethyl-chitosan ( MHC) , synthetized by chemical derivatization from chitosan, was used as the self-assembly micelles of QT. The formed polymer was characterized by 1 H NMR, elemental analysis and pyrene fluorescence spectrometry. The formulation of MHC micelles loading quercetin was optimized through single factor experiment. Then the optimized formulation was obtained as follows:the concentration of MHC was 0. 67% and the ratio of drug and carrier was 1 ∶10. The micelles particle size was ( 99. 21 ± 1. 71) nm, Zeta potential was +( 20. 01 ± 0. 72) mV and drug loading was ( 5. 42 ± 0. 32 )%. The in vitro release curve was investigated and was found to conform to Higuchi equation of Q=0. 1101 t1/2 -0. 064. The results of in vivo experiment showed that the mean rentention time and bioavail-ability of the MHC-QT micelles were 21. 42 h and 57. 49 μg h/mL, respectively, compared to 0. 30 h and 2. 50 μg h/mL of the free QT solution. These indicated that the MHC micelles could significantly improve the solubility of QT, the drug sustained-release effect and bioavailability, which would used as carrier for the anti-tumor drugs.