Objective To investigate the effect of Bi-level positive airway pressure ventilation (BiPAP) combined with Seretide on quality of life of elder patients with moderate and severe chronic obstructive pulmonary disease (COPD) and type Ⅱ respiratory failure.Methods Eighty elderly patients with moderate to severe COPD and type Ⅱ respiratory failure were selected and randomly divided into observation group (n =40) and control group(n =40).The two groups were given conventional anti infection,oxygen inhalation,spasmolysis,expectorantand other conventional treatment,and the use of BiPAP ventilator assisted ventilation.Patients in observation group were administered the combined of Seretide and BiPAP treatment,and patients in control were received only BiPAP.Arterial blood gases before and after 7 d treatment,lung function and quality of life evaluation results (SQGR score) before and after 7 d,3 months and 6 months treatment,were measured.Results There were significant differences in terms of arterial blood gases,pulmonary function key indicators,SQGR score between two groups before and after treatment(P ＜ 0.01).PaCO2 was significantly after 7 d of treatment in observed group was (42.9 ± 7.9) mmHg,lower than that of the control group ((47.6 ± 8.0) mmHg; t =8.467,P ＜0.001).There was no significant difference in terms of forced expiratory volume in one second(FEV1) in both groups at 7 d,3 months,6 months after treatment (P ＞ 0.05).FEV1/forced vital capacity (FVC) in two group at 3 months,6 months after treatment were different compared to 7 d after treatment (observation group:(49.9 ±5.1)％ and (47.1 ±4.2)％,(50.2 ± 5.0)％ and(47.1 ±4.2)％ ;control group:(49.0 ± 5.4)％and (46.6 ± 5.9) ％,(49.8 ± 5.2) ％ and (46.6 ± 5.9) ％ ; P ＜ 0.05).SQGR score in observation group at six months after treatment were (40.8 ± 8.5),significantly lower than that of 7 d after treatment(45.9 ± 10.8),P ＜ 0.05),and significantly lower than the control group after 6 months of treatment ((40.8 ± 8.5) vs (46.0± ± 8.0),P ＜ 0.05).Conclusion Seretide combined with BiPAP treatment can significant improve lung function and the quality of life of patients with moderate and severe COPD and type Ⅱ respiratory failure.

AIM: To investigate the effects of selective phosphodiesterase 3 inhibitor olprinone on cough response in guinea pigs sensitized and challenged with ovalbumin. METHODS: Forty sensitized guinea pigs were randomly divided into control ( n = 10), challenged ( n = 10), olprinone ( n = 10) and aminophylline group ( n = 10 ). Two hours after challenged with the aerosol of 1% ovalbumin or saline, animals were intraperitoneally injected either with saline,25 mg/kg of olprinone or 25 mg/kg aminophylline. At 24 h, the injection was repeated with 2. 5 mg/kg and 25 mg/kg olprinone or 2. 5 mg/kg and 25 mg/kg aminophylline respectively in olprinone and aminophylline group, cough response to inhaled capsaicin and airway responsiveness to methacholine (PC150) were measured. Then, total cell number and differential counts were analyzed in bronchoalveolar lavage fluid. RESULTS: The cough frequency was (5 ± 2) times/3 min in control group and (24 ± 3 ) times/3 min in challenged group ( P ＜ 0. 05 ), while PC150 was (659 + 57 ) mg/L in control group and (238 + 67 ) mg/L inchallenged group ( P ＜ 0. 05 ). 25 mg/kg olprinone significantly inhibited the augmented cough response and airway hyperresponsiveness, the cough frequency and PC150 were (15 ±2) times/3 min and (580 ±45) mg/L (P ＜ 0. 05 ), which differed significantly from (18 ± 2) times/3 min and (438± 52) mg/L in aminophilline group (P ＜ 0. 05). However, olprinone failed to reverse the elevated total cell number and percentage of eosinophils in bronchoalveolar lavage fluid from guinea pigs challenged with ovalbumin (P ＞ 0. 05 ). CONCLUSION: Phosphodiesterase 3 inhibitor attenuates cough response associated with eosinophilic airway inflammation by bronchodilatory effect.

Objective To evaluate the feasibility of an intelligent three-dimensional ultrasound technique (Smart mid-sagittal planes,Smart MSP) in automatically detecting the fetal cranial mid-sagittal view.Methods Two hundred and forty pregnant women with singleton pregnancies were imaged to display the mid-sagittal view of fetal head using the Smart MSP by six doctors divided into three groups according the different experiences.Another two doctors were then invited to score the images acquired and to compare the successful rates of 6 doctors for acquiring fetal cranial mild-sagittal view according to the doctors' experience.Results The overall successful rate of acquiring the mid-sagittal view was 97.08％ (233/240) with the bipartial diameter plane (BPD plane) as the starting plane and 98.33(237/240) with the trans-cerebellum plane as the starting plane by using Smart MSP program.The successful rates in three groups were similar but the consumed times were different(P ＜0.05).The experienced doctors consumed less time than non-experienced doctors.The scores were also different in three groups.The scores of experienced doctors (group B and C) were significantly higher than that of non-experienced doctors (Group A) (P ＜0.05).There was no significant difference in the scores between experienced doctors (group B and C) (P＞0.05).Conclusions Smart MSP is a novel and feasible method for the automatic visualization of fetal cranial mid-sagittal plane,which may become an effective tool to screen the fetal midline anomalies in future.

Objective To evaluate the clinical significance of prenatal ultrasonography in diagnosis of retroaortic left innominate vein ( LINV ) . Methods Thirty fetus with retroaortic LINV were involved , including 17 cases of isolated retroaortic LINV and 13 cases of complicated retroaortic LINV . Three-vessel and trachea ( 3VT ) view was focused in the routine second trimester ultrasound screening to observe whether LINV existing or not . And then the transducer was rotated to the fetal sagittal view to assess the relationship between LINV and aortic arch and the convergence of left subclavian vein and left internal jugular vein into the LINV . Results The characteristic feature of retroaortic LINV was the LINV converge into right superior vena cava ( SVC) under the aortic arch ,not above the aortic arch . The most important plane to detect the retroaortic LINV was the 3VT view ,which revealed the abnormal vein lying to the left of pulmonary artery . The abnormal vein then could be traced and revealed its connection with the right SVC beneath the aortic arch on the transverse plane inferior to the 3VT view and on the fetal sagittal plane . Conclusions The whole course of retroaortic LINV can be revealed by ultrasound prenatally ,which can not only account for the abnormal vein to the left of pulmonary artery on 3VT view ,but also play an important role in surgery decision and future cardiac intervention treatment .

Objective To explore the role of stem cell factor(SCF)-mediating fibroblasts and mast cells interaction in pathophysiology process of asthma.Methods We transfected NIH3T3 cells with SCF antisense oligonucleotide(SCF ASON) and detected SCF expression by immunochemistry and RT-PCR.Then,we isolated mast cells from mouse bone marrow and established NIH3T3 and mast cells cocultures.After SCF ASON intervention,histamine and eotaxin levels in culture supernatants were determined by ELISA and fluorometry.Growth curves of fibroblasts and mast cells were drawn.We also observed mast cells apoptosis by AO stain and flow cytometric analysis.Results SCF ASON strikingly down-regulated SCF protein and mRNA level of NIH3T3 cells.SCF ASON intervention inhibited the growth of NIH3T3,and induced mast cell apoptosis in cocultures(14.0%?0.81% at 96 hour).Both histamine[(3.08?0.38)?g/L vs(3.83?0.41)?g/L,P

Objective To evaluate the diagnostic value and limitation of multichannel intraluminal esophageal impedance and pH (MII-pH) monitoring on the diagnosis of gastroesophageal reflux-related chronic cough (GERC).Methods The patients with suspicious GERC consecutively referred to our respiratory clinic between May 2010 and July 2011 underwent a MII-pH monitoring,and received anti-reflux drug therapy,irrespective of the laboratory findings.Chronic cough due to gastroesophageal reflux was determined when there was a favorable response to anti-reflux therapy.Then,the sensitivity,specificity,false positive and negative rate,total consistence,positively and negatively predictive value,the area under the curve of ROC and the Kappa value of the laboratory investigation were calculated for the diagnosis of GERC.Results During the research period,56 patients completed MII-pH monitoring.Among them,the abnormal reflux was found in 35 patients,and GERC was finally confirmed in 30 patients (85.7％) including 25 patients (83.3％) due to acid reflux and 5 patients (16.7％) due to non-acid reflux.In the remaining 21 patients with normal reflux episodes,6 patients (28.6％) could be explained by non-acid reflux for their cough because of a relatively predominant weakly acid reflux and favorable response to empirical anti-reflux therapy.For the diagnosis of GERC,MII-pH monitoring had the sensitivity of 83.3％,the specificity of 75.0％,false positive rate of 25.0％,false negative rate of 16.7％,total consistence of 80.4％,positive predictive value of 85.7％,negative predictive value of 71.4％,the area under the curve of ROC of 0.792 and Kappa value of 0.577 respectively.Conclusion MII-pH is a sensitive and reliable tool for the diagnosis of GERC due to its ability to detect both acid and non-acid reflux.

Objective: Vascular dilation dysfunction has been linked with risk of cardiovascular disease. This study was undertaken to investigate the relationship between physical activity and vascular dilation function in healthy middle-aged adults to help explaining the effect of physical activity on preventing cardiovascular disease. Method: We recruited 91 healthy middle-aged adults to complete a serf-report 7-day physical activity recall questionnaire and an exam of brachial artery flow-mediated dilation(FMD) and Nitroglycerin-mediated dilation (NMD) detected by ultrasound. The relationship between physical activity level (PAL) and FMD and NMD were explored. Result: Physical activity showed a significant and positive relationship with the brachial artery FMD, even after adjustment for possible confounding factors (r=0.363, P<0.01). The group of high physical activity level had the highest FMD. The means of FMD (%) in low, moderate and high PAL groups were respectively 8.70%±3.93%,9.01%±3.22% and 12.38±5.67% with significant difference between individuals of low and high PAL and between moderate and high PAL group(P<0.01). The means of NMD (%) is 25.13%±6.52%,24.38%±5.44% and 29.50%±7.25% respectively (P> 0.05) and there was no significant difference among three groups. There was no positive relation between PAL and FMD in premenopausal females but in men and postmenopausal females. Although individuals of high PAL have the best FMD, the moderate PAL can also retard FMD decrease with ageing. Conclusion: Maintaining high physical activity level can enhance endothelial-dependent vascular dilation, and moderate or high physical activity level can prevent endothelial-dependent vaseular dilation declining with aging, which may contribute to decrease risk of cardiovascular disease in healthy middle-aged adults.

Objective To evaluate the values of prenatal surveillances of ultrasonography in twin pregnancies with amniotic fluid discordance. Methods Two hundred and seventy cases of diamniotic twins were included. Both postnatal outcomes and prenatal amniotic fluid discordant variations were analyzed,and the incidences of amniotic fluid discordance were compared between the monochorionic-diamniotic(MCDA)and dichorionic-diamniotic (DCDA) gruop. Results Twenty four cases of twins with amniotic fluid discordance were found in the study. The incidence of amniotic fluid discordance in MCDA group was much higher than that in DCDA group (28.9% vs 5.6%, P ＜0. 001 ) ,and 24 cases of twin-to-twin transfusion syndrome (TTTS) were diagnosed in the former group and none were found in the latter group. Downward tendency of amniotic fluid discordance was shown in non-TTTS cases of MCDA group. Compared with TTTS cases, the postnatal outcomes of non-TTTS cases with amniotic fluid discordance were much better in MCDA group ( P ＜0.001 ). Conclusions TTTS and MCDA twins with amniotic fluid discordance may overlap each other in the early stage. Serial surveillances of ultrasonography are necessary for prenatal differentiating twin pregnancies complicated by amniotic fluid discordance,and providing strong support to clinical treament.

Objective To explore the research hotspots and development trends of pyrroloquinoline quinone(PQQ),and explore the research and application value of PQQ.Methods In this study,Web of Science was used as the retrieval database to search for literature related to PQQ published from 1985 to 2022,and VOSviewer software was used to include the keywords,countries and regions,journals,etc.Bibliometric analysis was performed on these literatures.Results A total of 1 512 articles were included,with an overall upward trend in the number of annual publications.The journal category with the highest number of publications was Biochemistry and Molecular Biology.Journal of Biological Chemistry had the highest total link strength.The high-frequency keywords mainly included dietary nutrition supplement,mitochondria,antioxidant,etc.The visualization results of countries and regions showed that although China started its research relatively late,and it had a strong connection intensity with other countries.Conclusion In recent years,the research heat of PQQ has gradually increased,and its antioxidant effects,improvement of mitochondrial function and action targets may be the hotpots of future research.PQQ still has broad development prospects,and will inject new vitality into the pharmaceutical and healthcare industry.

Objective To discuss the clinical characteristics of benign paroxysmal vertigo of childhood (BPVC) with frequent episodes,in order to further improve the level of diagnosis and treatment.Methods The clinical data of 25 cases with frequent episodes of BPVC were analyzed retrospectively.All cases were treated with regimen for migraine.Results Aspirin combined with propranolol had the best effect,quick effect,short period of treatment and minimal side effect.Conclusion Aspirin and propranolol are commonly used drugs in the treatment of migraine,which can effectively treat frequent episodes of BPVC,and is economical and practical,and it is conducive to promotion at the grass-roots level.It also confirms the homology of children with benign paroxysmal vertigo and migraine.