Objective To select more rapid,sensitive and specific method in detection of respiratory syncytial virus(RSV)directly from clinical specimens.Methods RSV was detected by virus isolation in tissue culture,direct smears and detection by indirect immunofluorecence assay(IFA),rapid culture assay,sandwich enzyme linked immunosorbent assay(ELISA)as well as labbed streptavidin biotin method(LSAB)from 45 specimens(nasopharyngeal aspirates,NPAs) collected from infants and young children with acute lower respiratory tract infection.Results Of 45 NPAs,12 cases(26.7%) were positive by virus isolation,14 cases(31.1%) were positive for RSV by direct detection of RSV antigen by IFA,20 cases(44.4%) were positive with rapid culture assay,4 cases(8.9%)were positive by sandwich ELISA,4 cases(8.9%)were positive by LSAB.Conclusion Rapid culture assay and direct detection of RSV in NPAs direct smears by IFA are rapid,sensitive method in the diagnosis of RSV infections.

Objective To understand the training effect and discuss psychiatric nurse specialists training′s influence on the core competence and scientific research ability by investigating the working status of psychiatric nurse specialists with the Chinese Nursing Association certification, and in order to improve the quality of the psychiatric nurse specialists training experience. Methods 100 nurses who participated in the Chinese Nursing Association psychiatric nurse specialists training from 2010 to 2014 were chosen by random number table method. Surveyed with their core competence and scientific research ability after training to understand their working status. Results Eighty-eight valid questionnaires were recovered. Scores in core competence of nurses after training were 2.78 ± 0.55, which in the medium level;education background was the main influencing factor of core competence (t=-2.891, P<0.01). Average scientific research ability scores were 1.74 ± 0.88, which was in low level;education background and title were main influencing factors of scientific research ability (t=-3.310, F=5.922, P<0.01). After training, 62.5%(55/88) psychiatric specialist nurses undertook clinical and nursing work the night shift. 82.9%(73/88) of specialist nurse after back to the unit to undertake the teaching work. 52.2% (46/88) psychiatric specialist nurses carried out the scientific research work, and a total of 33 articles published. 79.5%(70/88) of specialist nurses thought hospital for junior nurses more seriously, 35.2% (31/88) of psychiatric specialist nurses′ units carried out the follow-up training. 6.8% (6/88) of hospital tilted in wages reward about nurse specialist, 18.2% (16/88) of hospital tilted in the cut about nurse specialist. Conclusions After training,psychiatric nurses play an important role in clinical care, research, teaching and other work, but their core competencies and research capabilities should to be improved by the further training of the hospital. Although the hospital attaches great importance to specialist nurses, but in the wage awards and title do not tilt.

Objective To evaluate the performance of domestic matrix-assisted laser desorption/ionization time-of-flight mass spectrometry system Clin-TOF-Ⅱ MS with BioExplorer V2.3 database ( Clin-TOF MS system) on gram-negative bacteria identification.Methods This was a methodological comparison study.A total of 1 025 gram-negative strains of 32 genus, 56 species or species complex were included in this study from 1999 to 2000 and 2014 to 2016 in Peking Union Medical College Hospital.The Bruker Biotyper MS system ( Bruker MS system ) , Bruker Autoflex Speed with Biotyper v 3.1 database were used as control.Identification by both MALDI-TOF MS systems were parallel conducted by direct smear method.The 16S rDNA sequencing based identification was performed when either MALDI-TOF MS system gave“unbelievable result” or results from two systems were not consistent.Results Amongst the isolates studied, 98.05% (1 005/1 025) was correctly identified to species or species complex level by Clin-TOF MS system.Comparatively, 99.22%(1 017/1 025) was correctly identified by Bruker MS system.There were 17 isolates just identified to genus level and 2 isolates were “no identification” by Clin-TOF MS system, meanwhile 1 Pseudomonas monteilii misidentified as P.putida.There were only two 2 isolates identified to genus level and 3 isolates were“no identification” by Bruker MS system.But it misidentified all 3 Aeromonas hydrophila (2 isolates as A.caviae and 1 isolate as A.media).It′s noted that both MS systems identified 1 Chryseobacterium gleum and 1 C. bernardetii to genus level.Conclusion The identification capability of domestic Clin-TOF MS system was good on gram-negative bacteria.

AIM: To observe of optical coherence tomography angiography (OCTA) and indocyanine green angiography (ICGA) image feature in polypoidal choroidal vasculopathy (PCV).METHODS: Selected 21 patients 21 eyes with PCV in our hospital from January 2016 to December 2016.All the eyes were examined by ICGA, and was examined by OCTA after ICGA examination 1h.We observed the characteristics of OCTA and ICGA images.RESULTS:ICGA examination showed that there were 8 cases of choroidal abnormal branch vascular network (BVN), polypoid lesions 10 eyes, BVN with polypoid lesions 2 eyes, no abnormal performance 1 eyes.OCTA examination showed 8 eyes of BVN, and the location, range and shape of BVN were similar to ICGA in OCTA examination.ICGA examination showed 10 cases of polypoid lesions.OCTA showed strong signal highlights.ICGA examination showed 2 cases of BVN complicated with polypoid lesions, and OCTA examination showed strong signal highlights of BVN and corresponding parts.ICGA examination showed no abnormal performance in 1 eyes, and no abnormal findings in OCTA examination.CONCLUSION: OCTA and ICGA are similar in the location and morphology of PCV lesions, and OCTA may play a role in the diagnosis of PCV restricted ICGA.

A microfluidic chip with integrated microelectrode for real-time dopamine detection was designed and fabricated. The chip consisted of a polydimethylsiloxane ( PDMS) channel plate and a glass electrode plate. One central channel as the culture chamber of neural stem cells and two lateral channels for transport of the culture medium were integrated on the PDMS channel plate. Microelectrodes for real-time dopamine detection were integrated on the glass electrode plate. To solve the problem in demoulding the PDMS channel plate from the silicon mould, a novel demoulding method was developed. An Au-Au-Au three-electrode system was constructed, and it performed well in electrochemical detection. The performance of the microfluidic chip was primarily studied by detecting dopamine dissolved in the medium for the culture of neural stem cells. The limit of detection was 3. 92 μmol/L, the linear detection range was from 10 μmol/L to 500 μmol/L, and the detection reproducibility from different chips was less than 4%.

Objective To investigate the mechanism and effect of thalidomide on gastrointestinal bleeding of angiodysplasia. Methods The endothelial cells of human umbilical vein were cultured in vitro to exponential phase of growth, then were divided into blank control, solvent control and different concentrations (10- 100 μg/ml) of thalidomide incubated with or without basic fibroblast growth factor (bFGF). The cell proliferation was measured by MTT assay 72 h after stimulation. The expressions of vascular endothelial growth factor (VEGF) and tumor necrosis factor-α (TNF-α) were detected by ELISA and real-time PCR, respectively. Results The proliferation of endothelial cells of human umbilical vein was inhibited by thalidomide (≥40 μg/ml) both in presence or absence of bFGF. The expression of VEGF could be inhibited by 20 μg/ml of thalidomide in the absence of bFGF and 10 μg/ml in the presence of hFGF. No expression of TNF-α was detected. Conclusions The in vitro study reveals that thalidomide can inhibit the proliferation and the expression of VEGF, which may treat gastrointestinal bleeding of angiodysplasia by suppressing the angiogenesis.

Objective To observe and investigate the therapeutic effect of thalidomide on gastrointestinal bleeding of angiodysplasia.Methods Eighteen patients with recurrent gastrointestinal bleeding of angiodysplasia were treated with thalidomide 100 mg daily for 4 months.Median follow-up time was 16.7 months.The changes of clinical setting and serum.vascular endothelial growth factor(VEGF)and tumor necrosis faetor-α(TNF-α)level between pre-therapy and post-therapy were compared.Results The clinical setting of patients in post therapy was significantly better than that in pre-therapy.The overall symptom score,the median bleeding frequency and median transfusion volume of patients after therapy was significantly lower than those before the therapy[(15.000±3.630)vs(5.330±3.325),(11.220±6.404)vs(1.000±1.237),(1422.22±1556.601)ml vs(100.00±240.098)ml,respectively,all P＜0.01],while median hemoglobin was obviously higher than that before the therapy[(5.950±1.656)g/ml vs(9.533±2.278)g/ml,P＜0.01].Serum VEGF and TNF-α levels decreased obviously after the therapy(118 pg/ml vs 58 pg/ml,116 pg/ml vs 34 pg/ml,P＜0.01).Conclusions Thalidomide can suppress the serum VEGF and TNF-α levels of the patients with recurrent gastrointestinal bleeding of angiodysplasia,then play a significantly role in preventing the rebleeding in patients with recurrent gastrointestinal bleeding of angiodysplasia.

Objective To evaluate the value of stereotactic core needle biopsy(SCNB)in diagnosis of breast lesions.Methods Forty-seven cases were punctured with computer-assisted stereotactic system, spring-loaded biopsy guns and 16 G core needles.The record of each item was collected,including clinical manifestations,descriptions of the mammographic characteristics(such as calcification,mass and architectural distortion),the pathology of the SCNB and the surgical pathology or mammographic follow-up data.Then the results of SCNB were analyzed based on the comparison of SCNB pathology and the surgical pathology.The reason that SCNB failed and misdioagnosed was inferred from the relationship of SCNB accuracy and the X-ray characteristics.Results Forty-four cases were punctured successfully,3 cases failed.Thirty-one patients were operated soon after biopsy.The results of 27 SCNB cases agreed well with the final pathology but the other 4 did not.Conclusions SCNB as an accurate,time-saving and cost- effective method,is also minimally invasive and hardly changes the architecture of the breast.SCNB can diagnose breast lesions in advance,reduces the number of surgical biopsy,and is promising in clinical application.

Objective To investigate the inhibitory effect of thalidomide on angiodysplasia.Methods Excisional intestinal specimens were collected and immunohistochemical examination was carried out.The human umbilical vein endothelial cells were cultured in vitro to exponential phase of growth,divided into six groups and synchronized for 24 hours.They were then stimulated with thalidomide (40-100 μg/ml) for 72 hours.MTT assay was used to assess cellular proliferation.ELISA,real-time quantitative PCB and western blot were applied to detect the expression of VEGF/HIF-1α of human umbilical vein endothelial cells (HUVEC).Results Immunohistochemical analysis of intestinal pathological specimens demonstrated higher expression of VEGF.ELISA showed that the expression of VEGF under hypoxia was obviously higher than that under normoxia [ ( 1199.3 ± 61.4) ng/L vs ( 864.7 ± 41.2 ) ng/L,P < 0.05 ].Real-time quantitative PCR and Western blot discovered that thalidomide inhibited the expression of VEGF/ HIF-1α of HUVEC (P < 0.05).The effect of thalidomide was dose-dependent.Conclusions Thalidomide can suppress the expression of HIF-1α and VEGF in HUVEC in vitro and then inhibit angiodysplasia,which may play a significant role in stopping the rebleeding in patients with recurrent gastrointestinal bleeding.

Objective:To observe the image characteristics of optical coherence tomography (OCT) in patients with primary vitreoretinal lymphoma (PVRL).Methods:A retrospective clinical study. Thirty-two eyes of 19 patients diagnosed with PVRL by vitreous pathology in the Department of Ophthalmology, Beijing Tongren Hospital from September 2016 to October 2019 were included in this study. There were 7 males and 12 females. The median age was 56 years. The mean time from symptom onset to final diagnosis was 6.1±3.8 months. The first diagnosis was uveitis in 12 cases (63.1%, 12/19), retinal vein occlusion in 2 cases (10.5%, 2/19), central retinal artery occlusion in 1 case (5.3%, 1/19), and suspected PVRL of camouflage syndrome in 4 cases (21.1%, 4/19). Routine ophthalmic examination and frequency-domain OCT examination were performed in all the patients, and typical images were stored for analysis. According to the examination results, PVRL OCT signs were divided into vitreous cells, inner retinal infiltration, outer retinal infiltration, retinal pigment epithelial (RPE) infiltration, sub-RPE infiltration, and subretinal fluid.Results:Vitreous cells were found in all eyes (100.0%, 32/32). RPE infiltrated were observed in 19 eyes (59.4%, 19/32), RPE infiltration in 16 eyes (50.0%, 16/32), outer retinal infiltration in 8 eyes (25.0%, 8/32), inner retinal infiltration in 16 eyes (50.0%, 16/32), and subretinal fluid in 4 eyes (12.5%, 4/32).Conclusions:PVRL OCT signs can involve vitreous and retinal anatomical levels, including vitreous cells, inner retinal infiltration, outer retinal infiltration, RPE infiltration, sub-RPE infiltration and subretinal fluid. The same patient can show multiple signs at the same time.