0.997 5);their average recovery rates were 99.93%,99.82%,100.02%,99.03%,and 98.79%(n=9),respectively,and their RSD were 0.66%,0.42%,0.55%,0.74%,and 0.98%(n=6),respectively.CONCLUSION:The established method is simple,rapid with accurate and reliable results thus applicable for the quality control of lecithin.

Objective To evaluate the feasibility and indications of endoscopic submucosal dissection (ESD) by analyzing the early gastric cancer cases.Methods All the pathological materials of radical gastric resections in Huashan hospital from 2007 to 2011 were retrieved and the EGC cases were selected.All the cases in EGC group which met the extended ESD criteria were reviewed.Extended ESD criteria were cited from Treatment guidelines for gastric cancer in Japan edited by JGCA in 2001.The risk factors relevant with regional metastasis,such as invasive depth and differentiation degrees,were also analysed.Results In the recent five years,there were 1159 cases of gastric cancer undergoing radical gastrectomy in Huashan hospital including 210 EGC.According to the extended criteria of JGCA,151 cases could be candidates for ESD while 126 cases could be candidates for ESD according to the typical criteria for ESD.The local metastases of lymphatic or vascular involvement for mucosa cancer,muscularis mucosae cancer,sm1 and sm2 cancer were 6.75％,15.00％,23.25％,and 39.62％ respectively (P ＜0.05).Twenty-five cases had local metastases that met the extended criteria for ESD.Within the 210 EGC cases,the local metastases of differentiated type and undifferentiated type were 13.95％ and 47.37％ respectively (P ＜ 0.05).Conclusion Most EGC cases undergoing radical gastrectomy can be cured by ESD.Its metastases are highly correlated with invasion depth and differentiation,so indications of ESD should be assessed.

Objective To observe the clinical features of migraine based on out-patient clinic data and provide help for the diagnosis and treatment of migraine. Methods In a retrospective study of 309 patients with migraine, we investigated the clinical characteristics of migraine of both genders and different types, and the risk factors for MOH transformed from migraine. Results The female to male ratio was about 3:1,76.1% of the patients had triggering factors. The most common characteristics of headache were moderate to severe intensity of the pain (97.7%), aggravation by routine physical activity (75.1%), and association with nausea (90.9%) and/or vomiting (70.6%). There were significant differences in some clinical characteristics of migraine in females as compared with these in males and in patients with migraine without aura (MWOA) as compared with those with aura (MWA). The risk factors for MOH transformed from migraine were elder age of onset, high attack frequency and the analgesics frequently used (P < 0.05).Conclusion It is suggested that carefully collecting the characteristics of headache, triggering factors and therapeutic history is the foundation of correct diagnosis and effective treatment for migraine.

Adult ; Allergens ; blood ; Case-Control Studies ; Chronic Disease ; Female ; Humans ; Immunoglobulin E ; blood ; Male ; Rhinitis ; blood ; Sinusitis ; blood ; diagnosis

The automatic spike detection in EEG is significant in both diagnosing epilepsy and alleviating the heavy labor force of the doctors. This paper proposes an empirical model decomposition (EMD) based epileptic spike detection method. It extracts the high frequency components related to spikes in EEG signal by EMD, and it detects the spikes by calculating the instantaneous amplitude of the high component with Hilbert transform. The results of experiments show that the method works well.
Algorithms ; Electroencephalography ; methods ; Epilepsy ; diagnosis ; physiopathology ; Humans ; Principal Component Analysis ; methods ; Signal Processing, Computer-Assisted

Objective To evaluate the effect of penehyclidine hydrochloride on Toll-like receptor 4 (TLR4)/nuclear factor kappa B (NF-κB) signaling pathway in the myocardium of pediatric patients undergoing radical correction of tetralogy of Fallot with cardiopulmonary bypass (CPB).Methods One hundred pediatric patients of both sexes,aged 5 months-3 yr,with body mass index of 13.9-16.0 kg/m2,of American Society of Anesthesiologists physical status Ⅱ or Ⅲ (New York Heart Association classification Ⅱ or Ⅲ),with the left ventricular ejection fraction＞50％,scheduled for elective radical correction of tetralogy of Fallot with CPB,were divided into 2 groups (n =50 each) using a random number table:penehyclidine hydrochloride group (group P) and control group (group C).Penehyclidine hydrochloride was intravenously injected at a dose of O.04 mg/kg immediately after successful internal jugular vein puncture in group P,and the equal volume of normal saline was given instead at the same time in group C.Before anesthesia induction,at 10 min after induction,after re warming to 36 ℃,at 1 h after termination of CPB,at the end of surgery and at 24 h after surgery,venous blood samples were collected to detect the concentrations of tumor necrosis factor-alpha,interleukin-6 (IL-6),IL-8 and cardiac troponin T in plasma (by enzyme-linked immunosorbent assay).Myocardial specimens were obtained from the right auricular appendage after opening of pericardium and at 1 h after aortic unclamping for microscopic examination and for determination of activated NF-κB and TLR4 protein and mRNA expression (by Western blot and real-time polymerase chain reaction,respectively).Results Compared to group C,the concentrations of plasma tumor necrosis factor-alpha,IL-6,IL-8 and cardiac tropnin T were significantly decreased after re-warming to 36 ℃C,at 1 h after termination of CPB,at the end of surgery and at 24 h after surgery,the expression of activated NF-κB and TLR4 protein and mRNA was down-regulated at 1 h after aortic unclamping (P＜0.05),and the pathological changes of myocardium were significantly attenuated in group P.Conclusion The mechanism by which penehyclidine hydrochloride reduces inflammatory responses is related to inhibition of the activation of NF-κB/TLR4 signaling pathway in the myocardium of pediatric patients undergoing radical correction of tetralogy of Fallot with CPB.

Objective To evaluate the effect of ulinastatin pretreatment on endoplasmic reticulum stress during myocardial injury in the patients undergoing mitral valve replacement (MVR) with cardiopulmonary bypass (CPB).Methods One hundred patients of both sexes,aged 35-64 yr,weighing 40-80 kg,of American Society of Anesthesiologists physical status Ⅱ or Ⅲ (New York Heart Association Ⅱ or Ⅲ),scheduled for elective MVR with CPB,were divided into ulinastatin pretreatment group (UP group,n=50) and normal saline control group (NS group,n =50) using a random number table.Ulinastatin 0.5× 104 U/kg was intravenously infused over 1 h before skin incision,and administration was repeated every 4 h until the end of operation in group UP,while the equal volume of normal saline was given instead in group NS.Immediately after opening the right atrium (T0),at 30 min after aortic clamping (T1) and while suturing the right atrium (T2),blood samples were collected from the radial artery for measurement of the concentrations of plasma creatine kinase-MB and cardiac troponin T by enzyme-linked immunosorbent assay.Right auricle specimens were obtained after blood sampling at each time point for determination of the expression of glucose-regulated protein 78,CCAAT/enhancer-binding protein homologous protein and c-Jun N-terminal kinase protein and mRNA (by real-time polymerase chain reaction and Western blot,respectively) and apoptosis in cardiomyocytes (by TUNEL).The apoptosis rate was calculated.Results Compared with group NS,the plasma concentrations of creatine kinase-MB and cardiac troponin T at T1 and T2 and apoptosis rate at T2 were significantly decreased,and the expression of glucose-regulated protein 78,CCAAT/enhancer-binding protein homologous protein and c-Jun N-terminal kinase protein and mRNA was down-regulated at T1 and T2 in group UP (P＜0.05).Conclusion The mechanism by which ulinastatin pretreatment inhibits apoptosis in cardiomyocytes and attenuates myocardial injury is related to decrease in endoplasmic reticulum stress in the patients undergoing MVR with CPB.

Objective:To investigate the changes and their clinical values of renal oxygen saturation(RrSO 2) and abdominal local oxygen saturation(A-rSO 2) in infants who underwent cardiac surgery. Methods:Thirty children with atrial septal defect or ventricular septal defect underwent cardiopulmonary bypass (CPB) in Henan People′s Hospital from April to August 2019 were randomly selected.There were 15 males and 15 females, aged 2-13 months, weighted 4.5-10.0 kg and American Society of Anesthesiologists(ASA) grade Ⅰ-Ⅲ.The probe of near-infrared spectroscopy(NIRS)was fixed at the body surface of the right kidney and 1 cm below the umbilicus.RrSO 2 and A-rSO 2 were continuously monitored during operation.The changes of parameters, including RrSO 2, A-rSO 2, mean arte-rial pressure(MAP), and nose temperature were recorded after anesthesia induction (T 0), cardiopulmonary bypass (T 1), 5 minutes after aortic blockade (T 2), the lowest temperature (T 3), 5 minutes after aortic opening (T 4), and 5 minutes after stopping cardiopulmonary bypass (T 5). CPB time, ascending aorta occlusion time and operation time were recorded as well.Meanwhile, perioperative complications such as acute renal injury (AKI) and gastrointestinal dysfunction were recorded.Relevant information, including the time of first eating after operation was recorded. Results:Totally, 30 children were enrolled in this study.The basic values of RrSO 2 and A-rSO 2 were (70.00±7.50)% and (70.70±11.29)%, respectively.Compared with T 0, the RrSO 2 and A-rSO 2 of patients decreased at T 1, gradually increased at T 2, T 3 and T 4, and returned to T 0 at T 5.There was no significant difference in RrSO 2 and A-rSO 2 at each observation point. Pearson correlation analysis displayed that there was a positive correlation between A-rSO 2 and RrSO 2 ( r=0.806, P<0.01). RrSO 2 and A-rSO 2 were positively correlated with MAP ( r=0.565, 0.605, all P<0.05), and negatively correlated with the nasopharynx temperature ( r=-0.365, -0.331; all P<0.05). Among them, 3 children(10%) suffered from AKI after operation.Compared with T 0, RrSO 2 values at T 1, T 2, T 3 and T 4 decreased significantly ( P<0.05). Postoperative gastrointestinal hysteresis occurred in 6 children(20%). The A-rSO 2 value in T 0-T 5 of children with gastrointestinal hysteresis was significantly lower than that of children without gastrointestinal hysteresis ( P<0.05). Conclusions:As a new noninvasive monitoring method of renal and intestinal function, NIRS has certain clinical guiding value in perioperative period of infantile congenital heart disease.

The properties of biomedical intelligent polymer materials can be changed obviously when there is a little physical or chemical change in external condition. They are in the forms of solids, solutions and polymers on the surface of carrier, including aqueous solution of hydrophilic polymers, cross-linking hydrophilic polymers (i.e. hydrogels) and the polymers on the surface of carrier. In this paper are reviewed the progress in researches and the application of biomedical intelligent polymer materials.
Biocompatible Materials ; chemistry ; Biotechnology ; Chemical Phenomena ; Chemistry, Physical ; Hydrogel, Polyethylene Glycol Dimethacrylate ; chemistry ; Polymers ; chemistry ; Surface Properties

OBJECTIVETo analyze and compare the cell growth and accumulation of flavonoids and chlorogenic acid in the callus and suspension cell of Eucommia ulmoides.

METHODThe callus induced from the leaf of E. ulmoides seedlings were suspended in liquid medium. The time courses of cell growth and yields of flavonoids and chlorogenic acid were studied.

RESULTThe highest contents of flavonoids and chlorogenic acid in the callus were 13.46, 1.712 mg x g(-1), respectively, while the contents of these two secondary metabolites were 16.63, 3.93 mg x g(-1) in suspension cell culture correspondingly.

CONCLUSIONComparing with callus, the suspension cell showed a short growth period and high growth rate with a remarkable high content of flavonoids and chlorogenic acid.

Cell Culture Techniques ; Cells, Cultured ; Chlorogenic Acid ; analysis ; metabolism ; Eucommiaceae ; chemistry ; metabolism ; Flavonoids ; analysis ; metabolism