Colorectal liver metastases (CRLM) are one of the main causes of death among the patients with colorectal cancer,yet most patients with CRLM are unable to get radical resection.Fortunately,thermal ablation can yield long-term survival efficacy in this population of CRLM patients.Currently,thermal ablation is the first-line treatment among other ablation technologies,including radiofrequency ablation and microwave ablation (MWA).However,recent advancements in microwave ablation techniques increase consideration of this method in the treatment of CRLM,such as:reliable,fast,efficient and rarely affected by heat-sink effect.This article aims to review the mechanism,efficacy,complications of MWA in treating CRLM.

Objective To establish a method of isolation, purification and identification of type Ⅱ alveolar epithelial cells (AEC- K ) from neonate piglet lungs of 1 ～ 3 days old and to investigate effects of proinflammatory cytokines on expression of growth factors (GFs). The yield, viability and purity of AEC- Ⅱ obtained using different enzyme digestion and purifying methods were compared. Methods After the first 24-hour culture of AEC- Ⅱ ,the media containing interleukin (IL)-1β,IL-6 and IGF-Ⅰ at different concentrations were used to culture AEC-Ⅱ for another 48 hours. And then the cells were counted and the expressions of insulin-like growth factor (IGF-Ⅰ ), platelet-derived growth factor ( PDGF), surfactant proteins (SP) -A and SP-B mRNA were determined by real time PCR. Results A significantly higher yield of AEC-Ⅱ was achieved by digesting the lung with 30 unit/ml elastase and 0.1 % trypsin at 37 t for 20 min, the yield was (5.33 ±0.54) × 106 after adjusted by the weight of lung and heart (P <0.01). The number of purified AEC-II obtained by immune adherence method was (38.0 ±28.0) × 106 perpiglet which was higher than by the method of percoll. The optimal phenotype maintenance time of AEC- Ⅱ was the first 24～96 hours in the primary culture. With increasing concentrations of IL-1 β and IL-6, there were decreased proliferation and expression of SP-A and IGF-Ⅰ mRNA in the cultured AEC- Ⅱ ,but SP-B mRNA expression was not affected. Both AEC-Ⅱ proliferation and expression of SP-A, SP-B mRNA decreased significantly after cultured with anti-IGF-Ⅰ. Conclusion In a new model of cultured AEC-Ⅱ from neonate piglets, IL-1β and IL-6 inhibited AEC- Ⅱ proliferation and SP-A mRNA expression through IGF-Ⅰ -dependent mechanisms.

The current situation of medical information was analyzed by displaying the co-appearance of countries and time, top 5 journals and co-appearance of subject headings in papers on medical information published in 1995-2014 with the papers on medical informatics covered in ISI Web of Science Database as an sample , in order to promote the study and provide reference for the related persons and institutions .

Objective To assess the changes of right atrial size and mechanical function after radiofrequency catheter ablation in patients with paroxysmal atrial fibrillation using real-time threedimensional echocardiography(RT-3DE), and to study the correlation between the changes of left atrial(LA)and right atrial(RA) volume and function. Methods Thirty-five patients with paroxysmal atrial fibrillation were undergone radiofrequency catheter ablation (RFCA) successfully. Transthoracic echocardiography (TTE),tissue Doppler imaging(TDI) and RT-3DE were performed before, 1 month and 3 months after procedure respectively. Late systolic volume and area of RA and LA,ejection fraction(EF) of RA and LA,late diastolic peak velocity of mitral valve inflow, tricuspid valve inflow and late diastolic peak velocity of mitral annulus and tricuspid annulus were recorded. Results The 3DE images of all patients were satisfied.LA max area and 3DE LA max volume were significantly reduced at 1 months and 3 months after procedure compared with basic stage [ ( 18.8 ± 6.3) cm2 vs (21.5 ± 6.2) cm2 , (38.8 ± 17.0) ml vs (46.1 ± 20.0) ml,P ＜ 0.05]. 3DE LA EF also declined markedly at 1 month after RFCA, and restored at 3 months later compared with baseline [(41.1 ± 13.7) % vs (51.7 ± 15.9) %, (41.1 ± 13.7) % vs (45.6 ± 18.3) %, P ＜0.05]. The size and mechanical function of the right atrial after procedure were no obvious changes. There were no evidently correlation between the changes of LA and RA volume and function. Conclusions RT3DE can provide a precise method to quantify the value of atrial volume and function. The LA size and volume are significantly reduced after RFCA in patients with paroxysmal atrial fibrillation, however, the RA size and function are no obvious changes.

Objective To evaluate the olfactory functions in patients with Parkinson's disease (PD) with a smell identification test developed for the Chinese population and to examine possible factors contributing to PD patients' olfactory performance.Methods Fifty-five patients with idiopathic and nondementia PD and 55 demographically matched healthy controls (HC) were recruited and their olfactory identification tested using the Chinese Smell Identification Test developed by the Institute of Psychology at Chinese Academy of Sciences.Results Olfactory identification score was significantly lower (t =-6.827,P＜0.01) in the PD group (19.3 ±5.4) as compared with the HC group (26.5 ±5.7).Of all PD patients,63.6％ scored over 1 SD below the age norm.In particular,of those with Hoehn-Yahr ratings between 2 to 3,77.8％ scored over 1 SD below the age norm.Receiver operating characteristic (ROC) curve analysis indicated that a cut-off score of 22.5 on the Chinese Smell Identification Test distinguished between PD patients and HC with a sensitivity of 74.6％ and specificity of 70.9％.Within the PD group,age,education,Hoehn-Yahr rating and Mini-Mental State Examination score were not found to correlate with olfactory performance (all P ＞ 0.05).Conclusion PD patients in China show significant impairment of olfactory identification,which is effectively captured by the Chinese Smell Identification Test.

Objective To investigate the risk factors of hepatitis B virus (HBV) reactivation after microwave ablation (MWA) and its prevention.Methods 72 patients who met the inclusion criteria were enrolled into the study.30 patients were in the control group and 42 patients in the prophylactic antivirus group.Results 8.3％ (6/72) patients developed HBV reactivation.A high HBV DNA load and no prophylactic antivirus therapy were independent risk factors of viral reactivation.Conclusion Prophylactic antivirus therapy can prevent HBV reactivation.

Objective To investigate the characteristics and the correlative factors of constipation in Parkinson's disease (PD) patients.Methods The demographic information,clinical features and history of medications of 193 patients with idiopathic PD consulting in the outpatient department of the First Affiliated Hospital,Anhui Medical University were collected.Patients were evaluated using following scales:Unified Parkinson's Disease Rating Scale Ⅲ (UPDRS Ⅲ),Hoehn-Yahr stage,Bristol Scoring Scale,Cleveland Constipation Scoring Scale (CCS),Scale for Outcomes in PD-autonomic for Autonomic Symptoms,Simple Food Frequency Questionnaire,Hamilton Depression Scale (HAMD),Mini Mental State Examination.The patients were divided into constipation group and non-constipation group based on Rome Ⅲ Criteria for Diagnosis of Functional Constipation,and the correlative factors of constipation were compared and analyzed between the two groups.The severity of constipation and influencing factors were also compared between patients with early onset constipation (occurred before present of motor symptoms) and patients with late onset constipation (occurred after present of motor symptoms).The impacts of anti-PD medication adjustments on constipation were assessed by observing the alteration of constipation severity in 41 PD patients.Results The incidence of constipation was 56.4％ (109/193) in our cohort of PD patients,and 21.1％ (23/109) of constipation was severe according to the assessing by CCS.The spectrum of constipation symptoms included defecation straining (89.9％,98/109),poor stool output (67.9％,74/ 109),reduced stool frequency (63.3％,69/109) and dryness of stool (60.5％,66/109).The age,disease duration,scores of Hoehn-Yahr stage,UPDRS Ⅲ and HAMD,levodopa equivalent dose (LED),frequency of urination disturbance in constipation group were significantly higher than those in nonconstipation group,while the daily quantities of vegetable and water intake in constipation group were significantly lower than those in non-constipation group.Age and HAMD scores were the independent risk factors of constipation (OR=1.049,95％ CI 1.014-1.086,P=0.006;OR=1.316,95％ CI 1.185-1.461,P =0.000).Among the 109 constipation patients,the course of PD,scores of Hoehn-Yahr stage,UPDRSⅢ and LED were positively correlated with the severity of constipation (r =0.269,0.338,0.315,0.341,0.371,all P ＜ 0.05),with HAMD score being the independent risk factor of constipation severity (OR =1.175,95％ CI 1.044-1.322,P ＜ 0.05).The severity of constipation and risk factors of constipation in patients with early onset constipation were not distinct from those with late onset constipation.Conclusions The incidence of constipation increases with the increment of age,disease duration,Hoehn-Yahr stage,UPDRS Ⅲ scores,LED,HAMD scores,urination disorder severity and the decrement of daily water and vegetable intakes.The severity of constipation is positively related to the severity of motor symptoms,the daily dose of anti-PD drugs and depression levels.PD patients with early onset constipation are not distinct from the patients with late onset constipation in terms of severity and risk factors.The influences of anti-PD drugs on constipation are variable depending on the specific drug used and individual constitution.Individualized treatment regimes are proposed with respect to the management of constipation according to the specific risk factors in PD patients.

ObjectiveTo establish a method for measuring exhaled nitric oxide (eNO)concentrations in neonates with and without hypoxemic respiratory failure ( HRF), and to investigate the relationship between eNO and respiratory parameters in neonates with HRF. Methods Twenty-two newborn infants with HRF and 26 control neonates were included within the first 24 hours of postnatal life.Their eNO levels were detected with a rapid-response chemiluminescence analyzer daily during the first week of their postnatal life, and lung mechanics and gas exchange efficiency were monitored at the same time, such as pulse oxygen saturation ( SpO2 ), inspired fraction of oxygen ( FiO2 ) and other parameters.Wilcoxon Mann-Whitney U tests were used to compare eNO, SpO2/FiO2 and eNO/ ( SpO2/FiO2 × 100) in two groups. Pearson's correlation analyses were used to determine the relationships between eNO levels and indices of hypoxemic respiratory failure. ResultsDuring the first two days of postnatal life, eNO values of HRF neonates were higher than those of the control neonates[day 1,(7. 9 ± 3.2 )× 10-9 vs. (5.8 ±1.8)×10-9, P＜0.05;day2, (8.8±3.2)×10-9vs. (6.0±2.4)×10-9, P＜0. 05], butthere were no significant differences in the following days. With SpO2/FiO2 increasing, difference of eNO values between the HRF and non-HRF controls became narrowed, but there was still two fold difference of eNO/(SpO2/FiO2 × 100) on day 5-7. ConclusionsA method for measuring eNO was established and there was difference in neonates with and without HRF, which diminished with prolonged postnatal days, reflecting pathophysiological characteristics of HRF.

Objective To analyze the importance and necessity of patient public education, and to explore its contents and approaches. Methods From September to October 2017, 2224 medical workers and patients from 9 tertiary public hospitals among southern, central and northern Jiangsu province were surveyed with the self-designed questionnaire. Demographic data of respondents and their views related to patient public education topics were surveyed. Descriptive analysis and chi-square test were used to analyze the data. Results Some patients were irrational in their cognition of patients′ obligations, risk of disease, expectation of curative effect, and responsibility for medical malpractice. 19. 9％ of them held that"patients were vulnerable groups who should not carry much obligations". Some of them were found with obvious negative emotions and unhealthy psychological characteristics. 54. 4％ of the medical workers held that"psychological conflicts among the various roles of patients lead to various behavioral contradictions", which obviously affected their medical work. Conclusions Patient public education can be an important approach to avoid irrationality of patients when they see doctors. Patient public education is an education activity against irrational cognition, psychology and behavior of the patients at large. It requires an orchestrated effort by the governments, schools, hospitals among other stakeholders.

Objective To investigate the prevalence of GJB2 ,SLC26A4 and mitochondrial DNA 12S rRNA m .1555A>G(mtDNA 1555A>G) mutations in Hui ethic group patients with nonsyndromic hearing loss (NSHL) from Northwest China .Methods A total of 420 peripheral blood samples were collected from unrelated Hui ethic group probands with NSHL in Northwest China .Amplified the target gene by polymerase chain reaction (PCR) af-ter extracting genomic DNA from whole blood .The mtDNA 1555A>G mutation was detected by PCR -Alw26I di-gestion ,then direct sequencing was used to the positive samples of mtDNA 1555A> G ,the coding region of GJB2 gene ,exon 8 and 19 of SLC26A4 gene .Results There were 11(2 .62% ) cases caused by mtDNA 1555A>G homo-zygous mutation in 420 patients with NSHL .There were 41(9 .76% ) cases including homozygote and compound het-erozygote ,caused by GJB2 gene mutation ,which was the most frequent deafness -related gene .The allel frequency of c .235delC accounted for 6 .90% ,as well as the most frequent(51 .33% ) mutational pattern in GJB2 gene .There were 20 patients(4 .76% ) were found carring two allel mutations in SLC26A4 gene .The allel frequency of c .919 -2A>G was 5 .0% ,accounting for a total of 68 .85% in all base alterations of SLC26A4 gene ,which was the major mutant form of SLC26A4 gene .Conclusion GJB2 gene is the most common deafness -gene in Hui ethnic group pa-tients with NSHL from Northwest China ,while c .235delC is the main mutant form ,and c .919-2A>G is the hot-spot mutation of SLC26A4 gene .Through this study we can provide the molecular epidemiology basis for Hui ethnic group patients with NSHL from Northwest China in genetic diagnosis ,genetic counseling and therapy by associated testing of three frequent hearing loss genes .