1.Analysis and Evaluation on Degassing Effect of Vacuum Degassing Apparatus
Bin CHEN ; Baoming NING ; Long ZHANG
China Pharmacist 2014;(5):880-881
Objective:To analyze and evaluate the degassing effect of vacuum degassing apparatus through the determination of ox-ygen content in pure water, gas pressure and air volume, and compare with suction filtration, boiling and ultrasonic methods to choose the appropriate degassing method for dissolution medium and guide the daily inspection work. Methods: The water residual oxygen, gas pressure and air volume were determined using a single water quality on-line monitoring instrument and a Carbo QC Anton Pear in-strument. The degassing effect of the vacuum degassing apparatus was detected under the conditions of negative pressure and certain de-gassing time. The degassing effect was also compared with that of suction filter, boiling and ultrasonic methods. Results: Under the conditions of 0. 06 MPa negative pressure, 41℃ medium temperature and 30 min degassing time, the degassing effect of the vacuum degassing apparatus was obvious. The degassing effect of suction filter and boiling methods was similar to that of the vacuum degassing apparatus, while that of ultrasonic method wasn't obvious. Conclusion:The use of vacuum degassing apparatus is simple and efficient with obvious degassing effect, which is suitable for the degassing process of dissolution medium.
2.Improvement of lesion detection in patients with differentiated thyroid carcinoma using 131I SPECT/CT
Xuemei YE ; Chunyan ZHANG ; Chen ZHANG ; Tianliang CHEN ; Bin LONG
Chinese Journal of Nuclear Medicine and Molecular Imaging 2014;34(2):100-102
Objective To evaluate the incremental value of 131I SPECT/CT over 131I whole body scan (WBS) in the patients with DTC.Methods A total of 97 patients with DTC (31 males,66 females,mean age:44.1 years,age range:17 to 74 years) were retrospectively reviewed.All subjects underwent 131I WBS and SPECT/CT after 131I treatment.The images were interpreted by 2 experienced nuclear medicine physicians.The final diagnosis was based on the pathologic findings and clinical follow-up.The diagnostic accuracies between 131I WBS and 131I SPECT/CT were compared using x2 test with SPSS 13.0.Results 131I WBS detected 175 lesions (128 neck and 47 distant lesions),while 131I SPECT/CT found 176 lesions (128 neck and 48 distant lesions).Out of the 176 lesions,78 were confirmed as benign and 95 as malignant,including 51 lesions in thyroid bed,67 cervical lymph nodes or local residual lesions,7 lesions related to local physiological uptake,30 distant metastases and 18 distant foci due to physiological uptake.The other 3 lesions were still in follow-up.The sensitivity and specificity of 131 I WBS was 73.7% (70/95) and 78.2% (61/78),respectively.The accuracy of 131I WBS (106/173,61.3%) was lower than that of 131I SPECT/CT (171/173,98.8%; x2=72.3,P<0.05).131I SPECT/CT corrected the diagnosis of 131I WBS in 67 lesions,including 37 local lesions (37/128,28.9%) and 30 (30/48,62.5%) distant metastases.The sources of error for the 67 lesions were due to wrong location (n =27) or wrong characterization (n =40).Compared with 131I WBS,131I SPECT/CT changed the location in 27 lesions,clinical staging in 8 cases and therapeutic strategy in 14 cases.Conclusions 131 I SPECT/CT could improve the differentiation of malignant local lesions from residual thyroid,of distant metastatic lymph node,lung or bone lesions from physiological uptake.Such incremental values would be valuable to the management of DTC patients compared with WBS.
3.Comparison of two different workflows of crossmaching by full-automatic blood grouping instrument
Long CHEN ; Bing HAN ; Bin TAN ; Lixin WANG ; Jinzhe TAN
International Journal of Laboratory Medicine 2017;38(15):2054-2056
Objective To provide an optimal working process for crossmatching by full-automatic blood typing instrument.Methods Two workflows were applied to crossmatch test by full-automatic blood typing instrument.One was diluting red blood cells of donor samples to concentrate of 1%,the other was detecting directly the donor′s packed red blood cells.Compared consistency and processing time of the two different workflows.Results Cross match results of two workflows were consistent well(U=0,P>0.05).The average processing times before testing and undergoing testing were not significantly different(t=0.692,t=0.562,P>0.05),whereas the average processing times after testing and throughout testing were significantly different(t=146.485,t=67.053,P<0.05).Conclusion The workflow of diluting donor′s sample before testing saved processing time and better suits hospital having a large quantity of specimens.
4.The Development Status and Countermeasures of Medical Sci-tech Novelty Assessment Work
Xinling WANG ; Liyan LONG ; Wei HE ; Bin CHEN
Journal of Medical Informatics 2015;(6):84-87
〔Abstract〕 Medical and health sci-tech novelty assessment plays a key role in information supporting in the hospital scientific research and management work of health sector.Combining with the current status of medical and health sci-tech novelty assessment work station in the Military Hospital of Beijing PLA, the paper puts forward countermeasures acoording to the existing problems, namely, weak management and personnel and so on, in order to promote comprehensive development of medical and health sci-tech novelty assessment work.
5.Study on blood-ocular barrier between the anterior and posterior chamber after peripheral iridectomy by contrast-enhanced magnetic resonance in rabbit
Xiao-chun, MAO ; Hu, CHEN ; Long-ting, DU ; Gui-gang, LI ; Bin, LI ; Hong, ZHANG
Chinese Journal of Experimental Ophthalmology 2012;30(7):617-620
Background Whether ocular anterior and posterior chamber exist a blood-aqueous barrier is in controversy.Conventional method can not offer a good evidence because it is unable to detect the aqueous component in the posterior chamber.Objective This study was to investigate the distribution of Gadolinium-diethylene triamine pentaacetic acids(Gd-DTPA)after peripheral iridectomy with magnetic resonance imaging(MRI)in rabbit.Methods Monocular peripheral iridectomy was performed on the right eyes in 8 clean New Zealand white rabbits and the fellow eyes were as controls.0.2 ml/kg(0.5 mol/L)Gd-DTPA,a tracer of MRI,was injected into ear vein in vivo to scan the eyes with MRI for the observation of the permeability and distribution.The signal enhanced ratio of interest region associated with time were analyzed.Results The signal in ciliary body of both eyes showed an immediately sharp enhancement within 10 minutes following the injection of Gd-DTPA with a peak intensity at 30-40 minutes,and then the intensity was gradually weaken over time.The signal was stronger in the operative eyes than that in the fellow eyes.The signal in the posterior chamber was gradually increased after operation,however,that in posterior chamber of the control eyes was lower.The interest regions of Gd-DTPA were ciliary,anterior chamber and posterior chamber,and the enhanced signal intensities were consisted in the posterior chamber after operation.However,the increase of the signal was not seen in the posterior chamber in the control eyes.Conclusions The pathway of plasma protein entering into the anterior chamber is very different from that of aqueous secretion.There exists a barrier between the anterior and posterior chamber which might be an integral part of the blood-ocular barrier.
6.Expression of heat shock protein 70 in gastric mucosa of rats during the early stage after severe scald injury and the effect of insulin
Shengyong LONG ; Jun LIU ; Rouhong DING ; Zhiyong WENG ; Bin HAN ; Zhenghua CHEN
Journal of Chinese Physician 2011;13(5):630-633,637
Objective To investigate the changes of the expressions of heat shock proteins 70 (HSP70) and insulin and HSP70 protect effect on the gastric mucosa of rats with scald injury, and explore the relationship between insulin and HSP70 . Methods With a model of 30 total body surface area (TBSA) full-thickness burned rats,the expression and distribution of HSP70 in the gastric mucosa was detected with immunohistochemical method and analyzed by a micro-image analysis system, and at the same time the pathological changes of the gastric mucosa tissue of each group were analyzed by Western blot and immunohistochemistry at the 3rd,6th,12th,24th and 48th hour postburn. Results The expression of HSP70 obviously decreased at the 48th hour post scald injury. The expression of HSP70 in the treatment group was significantly higher than that in the scalded group at most time points except the 12th(9.40±1.52,P=0.065) hour and at equal parallel time[(6.80±1.10,8.60±0.55,10.80±1.64,11.40±1.34),P<0.05]. The gastric mucosal injury index in the scalded group was significantly higher than that in the treatment group and at equal parallel time [(4.05±0.36,11.97±1.15,20.98±2.83,13.92±0.94,1.60±0.55),P<0.05]. In pathological observation, the control group manifested the intact gastric mucosal tissue formation, the scalded group showed obvious gastric mucosal tissue injury in the early phase of scald injury, while the treatment group showed less severe injury than the scald group. A positive correlationwas found in the gastric mucosal injury index and HSP70(r=0.904,P<0.01) and also between the serum glucose and HSP70(r=0.961,P<0.01).Conclusions Insulin increased the expression of HSP70 and decreased the gastric mucosal injury index in the gastric mucosal tissue of SD rats in the phase of scald injury. It may be one of the vital mechanisms of insulin protecting the gastric mucosal tissue.
7.Anti-thrombopoietin antibodies in systemic lupus erythematosus with thrombocytopenia
Xiaodan WU ; Xiongyan LUO ; Long CHEN ; Jing ZHANG ; Tong WU ; Minghui YANG ; Bin ZHOU
Chinese Journal of Rheumatology 2012;16(11):745-748
Objective To investigate the existence and significance of circulating autoantibodies to thrombopoietin (TPO) in sera from patients with systemic lupus erythematosus (SLE).Methods Fifty-six consecutive patients with SLE,twenty patients with idiopathic thrombocytopenic purpura (ITP),and twenty normal individuals were involved in this study.The characteristics of all patients with SLE were analyzed.Antibodies to TPO were detected using an enzyme-linked immunosorbent assay (ELISA).For normal distribution count data,x2 test or Fisher exact test was used,t test was used for measurement data,and Wilcoxon's rank test for non-normally distributed data which was represented by M(Q).Results A higher frequency of antibodies to TPO were observed in SLE patients than those in healthy controls (39.3% vs 0,x2=11.058,P=0.001).Moreover,anti-TPO antibodies were detected in 15 (57.7%) of 26 SLE patients with thrombocytopenia,compared with that in 7 (23.3%,x2=6.894,P=0.009) of 30 patients without thrombocytopenia.Furthermore,the patients with antibodies to TPO exhibited more severe thrombocytopenia (t=3.010,P=0.004).Finally,anti-TPO antibodies seemed more likely to occur in patients with arthritis (x2=5.959,P=0.015),anti-dsDNA antibodies (x2=5.959,P=0.015).Conclusion The high incidence of antibodies to TPO in SLE patients with thrombocytopenia suggests that anti-TPO antibodies might play a vital role in SLE patients developing thrombocytopenia.Thus,there might be a clinical value by detecting anti-TPO antibodies in SLE patients with thrombocytopenia.
8.An initial study of left intra-ventricular diastolic fluid dynamics in pre-diabetics using vector flow mapping
Jie SHEN ; Lixue YIN ; Jing LU ; Ping CHEN ; Pengqiu LI ; Shenghua XIE ; Wenhua LI ; Bin LONG
Chinese Journal of Ultrasonography 2012;21(2):93-98
Objective To evaluate left intra-ventricular diastolic blood flow patterns and fluid dynamics in pre diabetics using vector flow mapping(VFM),and to explore the value of left intra-ventricular hydromechanics characteristics assessment of intracardiac flow by VFM with more sensitive indexes.Methods Forty four patients with type 2 diabetes,twenty-eight pre-diabetes patients and thirty-three normal volunteers underwent VFM to determine the left ventricular(LV) diastolic blood flow patterns and fluid dynamics.The two-dimensional color Doppler flow images data were acquired in standerd apical fourchamber view during 3 complete cardiac cycles.These images were analyzed using a dedicated off-line workstation.At different level (mitral annulus,papillary muscl and apex level),the diastole blood flow parameters of LV including flow velocity and volume,velocity gradients (△V),pressure gradients (△P),diastole flow volume,vortex intensity ( Ⅵ),vortex area ( VA),vortex radius (VA) were derived.Thedifferences of the above parameters were compared among the three groups.The correlationship between diastolic function parameters and LV hydromechanics indexes were analyzed.Results ① Compared to normal group and pre-diabetics group,the LV diastolic function parameters E/A and e/a in diabetics group were lower( P <0.01),with no differences for E/e( P >0.05).There were no significant diffrences of these indices between diabetics group and pre-diabetics group( P >0.05).②)Compared to normal group,the intraventricular peak flow velocity at basal level,△V and △P in diabetics group and pre-diabetics group were lower( P <0.01),but there were no significant differences of these indices between diabetics group and prediabetics group( P > 0.05).③Compared to normal group,the diastolic positive volume at basal level in diabetics group and pre-diabetics group was lower ( P <0.01 ),but there was no significant differences of these indices between diabetics group and pre-diabetics group ( P > 0.05).④ Compared to the normal group,the Ⅵ in diabetics and pre-diabetics group was decreased,but there were no significant differences ofthese indices between diabetics group and pre-diabetics group( P >0.05).The VA and VR in diabetics and pre-diabetics group were increased,but there were no significant differences of these indices between diabetics group and pre-diabetics group ( P > 0.05).⑤ There were no correlationship between diastolic function parameters and LV hydromechanics indexes.Conclusions There is the same LV diastolic blood flow patterns and fluid dynamics existed in pre-diabetics as diabetics.VFM could be used as a new methods to demonstrate the early left intra-ventricular fluid dynamics damages in pre-diabetics patients.
9.Percutaneous vertebroplasty using 131I-loaded bone cement for the treatment of vertebral tumors in rabbit models:a preliminary experimental study
Ganggang WANG ; Caifang NI ; Long CHEN ; Bin ZHANG ; Chao YANG ; Shuai ZHANG ; Chenghua RUAN
Journal of Interventional Radiology 2014;(9):797-801
Objective To preliminarily evaluate the safety and efficacy of percutaneous vertebroplasty (PVP) with 131I-loaded bone cement in treating vertebral tumor in rabbit models. Methods Twelve New Zealand white rabbits with lumbar vertebral tumor, which was established by puncturing transplant of VX2 carcinoma, were randomly and equally divided into the study group and the control group with 6 rabbits in each group. PVP with injection of 131I-loaded bone cement was carried out in the rabbits of the study group, while PVP with injection of pure bone cement was employed in the rabbits of the control group. The blood cell count was determined in all the animals one day before PVP as well as on the 4th day after PVP. PET-CT examination was performed one day before PVP as well as on the 4th day after PVP to check the stand uptake value (SUV) of each vertebral tumor. SPECT was performed in all rabbits of the study group at one, 4 and 8 days after PVP respectively to estimate the distribution of 131I in the animals’ bodies. Eight days after PVP, blood cell counts, which were determined both before and after PVP, existed between the study group and the control group. SPECT that was performed after PVP indicated that 131I was mainly accumulated within PVP-treated vertebrae, and the distribution of 131I showed no obvious changes at different points of time after the procedure. Before PVP, the difference in SUV between the two groups was of no statistical significance (F = 0.765, P > 0.05). In the study group, the postoperative SUV was significantly lower than the preoperative SUV (F = 423.792, P < 0.05). Pathological examination showed that the extent of tumor cell necrosis around the bone cement in the study group was remarkably bigger than that in the control group. Conclusion In treating vertebral tumors with PVP, the use of 131I-loaded bone cement is clinically feasible, and short-term follow-up indicates that this technique is safe and effective.
10.Clinical significance of serum myocardial enzymes and CSF LDH detection in adults with intracranial infection
Qiong WU ; Kun WANG ; Zhen CHEN ; Lu LONG ; Ya TAO ; Shiyang QIU ; Bin YI
Journal of Chinese Physician 2015;17(4):554-557
Objective To investigate the changes and clinical significance of serum lactate dehydrogenase (LDH),creatine kinase (CK),glutamate pyruvate transaminase (AST),and cerebrospinal fluid lactate dehydrogenase (CSF LDH) in adult patients with acute central nervous system infection.Methods The levels of myocardial enzymes (AST,LDH,and CK) in serum of 96 adult patients with acute intracranial infection in 7days and 39 healthy people were measured by Beckman automatic biochemical analyzer and enzyme rate assay,and CSF LDH level in 96 patients were measured simultaneously.Results (1) The serum myocardial enzymes (LDH,CK,and AST) of intracranial infection group (47 cases with viral encephalitis,30 cases with tuberculous meningitis,and 19 cases with purulent encephalitis) were significantly higher than those of normal control group (P <0.01).(2)The myocardial enzymes (LDH,and AST ) of patients with cerebral functional disorder were significantly higher than those of patients with normal cerebral function (P <0.05).(3)The levels of serum AST,LDH,and CK in the virus encephalitis group,serum AST and LDH in the purulent encephalitis group,and serum LDH in the tuberculous meningitis group were significantly higher than those in the control group (P < 0.01).The CSF LDH level in the viral meningitis group was prominently lower than that in the tuberculous encephalitis group and purulent encephalitis group,respectively (P <0.01).(4) No correlations were found between CSF LDH and serum myocardial enzymes (P >0.05).Conclusions (1)There is significant change in the levels of serum LDH,CK,AST,and CSF LDH of adult patients with acute intracranial infection,especially in infected patients with cerebral functional disorder,and the change of LDH is the most obvious.(2)The levels of serum myocardial enzymes and CSF LDH are helpful to the differential diagnosis of intracranial infection in early stage,and judging the severity of the illness.