Objective To discuss clinical features and harmfulness of acid-base imbalance in newborn by investigating the changes in blood gas of cord and artery blood,and to establish more appropriate prevention measures. Methods One hundred and ninety-two cord blood and 113 peripheral artery blood of neonates were measured for blood gas analysis by automatic blood gas analysis instrument from America;meanwhile,the concentrations of K~+,Na~+ and Cl~- were detected by biochemical analyzer.Results Among 192 neonates,179 were normal labor and 13 neonates underwent acidosis of different degrees.The incidence was 79.9%.Among the 13 ca-(ses),2 cases had severe asphyxia and both of them got serious mixed acidosis.For all the neonates, 156 cases got acidosis, 84 neonates underwent respiratory acidosis (43.8%), 47 cases with metabolic acidosis (24.5%) and 25 cases with mixed acidosis (13.0%).The left 113 neonates were abnormal labor.Among them,99 cases had acid-base disturbance of different degrees (87.6%). Among the 99 acid-base disturbance cases, 50 cases were single metabolic acidosis (44.2%) and presented the most common changes; the second was single respiratory acidosis, totally 20 cases (17.7%).The third was metabolic acidosis combined with respiratory alkalosis, totally 16 neonates (14.2%).Eleven cases had mixed acidosis (9.7%) and 2 cases were respiratory alkalosis combined with metabolic alkalosis (1.8%).Conclusions While the normal labor neonates still got acidosis of different degrees,the acid-base imbalance of abnormal labor is much more prominent,and the critical neonates often got mixed acid-base imbalance.Serious acid-base imbalance can cause fatal pathological changes in body.The dangers of acidosis and alkalosis can not ignore either. The condition of acid-base imbalance can be judged more accurately by the combination of blood gas analysis and anion gap.The perinatal health cares are important measures to prevent acid-base imbalance.

OBJECTIVETo explore the alterations of after depolarization and triggered activity in myocardiac muscle during progression of mouse aortic stenosis.

METHODSAfter the establishment of mouse aortic stenosis model, the heart was collected and intracellular potential was recorded using standard glass microelectrode. After the recording, the action potential (AP), early after depolarization (EAD), delayed after depolarization (DAD) in papillary muscles were analysed.

RESULTS(1) Compared with that of time-matched control mice, there were no changes of the action potoutial duration at 90% repolarization(APD90) in model mice at 2 and 5 weeks, whereas the APD90 was progressively prolonged at 9 and 13 weeks. (2) During the 30 minites of the experiment, spontaneous EADs and DADs were frequently present in medel mice at 9 and 13 weeks, were not in control and model mice at 2 and 5 weeks. (3) Compared with those of control group, EADs and DADs triggered by hypokalaemia or isoproterenol were increased significantly. The incidence rate of triggering EADs and DADs was progressively increased over time.

CONCLUSIONEAD, DAD and trigger activities increase gradually during the process of aortic stenosis, and it suggests that the myocardium electrical-instability is markedly increased in the insult hearts.

Action Potentials ; physiology ; Animals ; Aortic Valve Stenosis ; physiopathology ; Disease Models, Animal ; Male ; Mice ; Myocytes, Cardiac ; physiology

OBJECTIVETo find the characteristic parameters from electrocardiogram (ECG) which is most related to pathological progress, surface ECG was performed in mice at 2, 5, 9 and 13 week post surgery.

METHODSElectrocardiogram recordings: The mice were anaesthetized with tribromoethanol (250 mg/kg, i.p.). Lead II surface ECG were acquired by using the Biopac System MP150 at a rate of 5 kHz.

RESULTS(1) No arrhythmia was observed in Sham and 2-week Band mice. Spontaneous arrhythmias were observed in ECG recordings, with an incidence of 15%, 28% and 63% in 5-, 9- and 13-week Band mice, respectively. Tachyarrhythmias, such as frequent premature ventricular extrasystole, bigeminy, trigeminy, and paroxysmal tachycardia were found. (2) Analysis of ECG recordings revealed a significant prolongation of QT and QTc intervals. Compared with age-matched Sham mice, the increment in QT and QTc intervals was 20.4%, 32.7%, 49.7%, 61.0% and 27.1%, 32.1%, 43.9%, 59.1% at 2, 5, 9 and 13 week, respectively (P < 0.01). (3) The characteristic change in electrocardiogram was on the J wave. The amplitude of J wave was upward in Sham mice, and it was significantly flattened or inverted in Band mice. (4) Except that RR interval at 2 week showed a slight decrease, there was no significant change in PR interval and RR interval in Band mice.

CONCLUSIONIn the present study, we found that the increase incidence of spontaneous arrhythmias, prologation of QT interval and changes in the amplitude of the J wave in the surface ECG during progression of mouse cardiac hypertrophy and failure, and the progressive pattern indicated that a gradual aggravation of the ventricular repolarization delay in this mouse model.

Animals ; Cardiomegaly ; physiopathology ; Disease Models, Animal ; Electrocardiography ; Male ; Mice

Acupuncture Therapy ; Humans ; Randomized Controlled Trials as Topic ; methods ; Single-Blind Method

Posterior capsular opacification (PCO) is one of the major complications of modern cataract surgery.Multiple studies had demonstrated that the extracellular matrix (ECM) plays an important role in the generation and development of PCO.A variety of ECM components,including fibronectin (FN),laminin (LN),collagen,lumican,osteoponin (OPN),decorin,hyaluronic acid and vimentin,affect the biological properties of lens epithelial cells (LECs) through different mechanisms,such as regulating cell migration,adhesion and proliferation.This review focuses on the role of ECM in PCO formation in order to explore the pathogenesis of PCO and provide a potential therapeutic approach for the prevention and management of PCO.

The origin and development of umbilical therapy in traditional Chinese medicine is explored from related literature in the history. As a result, the Shang period is regarded as initial period of umbilical therapy, while periods from Han Dynasty, Jin Dynasty and Southern-Northern Dynasties to Sui Dynasty and Tang Dynasty could be taken as stage of primary development. Time from Song Dynasty, Jin Dynasty and Yuan Dynasty to Ming and Qing Dynasties is believed as mature stage. Also the manipulation, application principle, indications and contraindications of umbilical therapy are explained. A brief overview of modern development of umbilical therapy is also described.
China ; History, 15th Century ; History, 16th Century ; History, 17th Century ; History, 18th Century ; History, 19th Century ; History, 20th Century ; History, Ancient ; History, Medieval ; Humans ; Medicine in Literature ; Medicine, Chinese Traditional ; history ; methods ; Umbilicus ; physiology

Schwann cells play an important role in diabetic peripheral neuropathy.Recently,to investigate the effect of high glucose on Schwann cell in vitro has become a new research hotpoint with the development of cell culture technology.This review concentrates on the biological effect of high glucose on Schwann cell.

Laboratory teaching played the crucial part of microbiology teaching, which was benefit to improve the operational capacity, analysis and resolving ability of students. We carried out the multiplicity teaching by remodeling experiment process, designing integral test, and resolving practical issue and setting up comprehensive trail. It was proved by fact that the multiplicity teaching increased the study interesting of students, inspired their activity, initiative and creativity.

3T3-L1 adipocytes transfected with TSH receptor (TSHR) shRNA were incubated with bovine TSH.The concentration of tumor necrosis factor (TNF)-α in culture medium was measured by enzyme linked immunosorbent asssy.Protein level of insulin receptor substrate 1 (IRS-1) was quantified by Western blotting.Tyrosine phosphorylation of IRS-1 was measured by immunoprecipitation.The results showed that 1 mIU/ml TSH significantly sitmulated TNF-α release in 3T3-L1 adipocytes [(341.85 ± 12.00 vs 522.67 ± 36.22) ng/L,P＜0.01],along with the decreases in IRS-1 protein expression and its tyrosine phosphorylation (P＜ 0.01).These effects disappeared when TSHR expression was down-regulated with RNA interference in 3T3-L1 adipocytes.In addition,WP9QY,a TNF-α antagonist,blocked TSH-decreased IRS-1 expresssion.These results suggest that TSH downregulates IRS-1 protein expression and its tyrosine phosphorylation through stimulating production of TNF-α,and thus contributes to the development of insulin resistance.

Objective:To investigate the changes of blood pressure and heart rate in patients aged over 80 years undergoing intravitreal injection of anti-vascular endothelial growth factor(VEGF)drugs under topical anesthesia without anesthetic monitoring in ophthalmology surgery, and to analyze the potential risk for surgery-induced acute cardiovascular and cerebrovascular events.Methods:This was a prospective observational cohort study.A total of 100 patients(aged 80 to 95 years, 47 males and 53 females)included 85 cases of wet age-related macular degeneration, 14 cases of retinal vein occlusion with macular edema, and 1 case of diabetic macular edema.These patients received anti-VEGF drugs injection, with accumulated injections of 1 to 36 times per patient.Blood pressure and heart rate were measured at visit to a medical clinic(as baseline), before operation, 0 min and 30 min after operation.The operation anxiety and pain scores were investigated by questionnaires.Comparison of systolic blood pressure, diastolic blood pressure and heart rate among four different time points was performed by Wilcoxon symbol rank test.Results:At four different time points i. e.at the baseline, before injection, 0 min and 30 min after injection, systolic blood pressure, diastolic blood pressure and heart rate showed an important regularity.The median systolic blood pressure at the four time points was 130(120-140)mmHg(1 mmHg=0.133 kPa), 142(129-149)mmHg, 153(139-164)mmHg and 143(130-151)mmHg, with ranges of 100-160 mmHg, 106-176 mmHg, 118-197 mmHg and 115-187 mmHg, respectively.The median diastolic blood pressure at the four time points was 70(65-75)mmHg, 76(69-83)mmHg, 81(73-87)mmHg and 75(69~81)mmHg, with ranges of 45-90 mmHg, 55-98 mmHg, 58-99 mmHg and 50-93 mmHg, respectively.The median heart rate at the four time-points was 70(65-80)beats/min, 72.5(65-81)beats/min, 73(66-80)beats/min and 70(65-76)times/min, with ranges of 50-95 beats/min, 48-101 beats/min, 51-93 beats/min and 50-87 beats/min, respectively.Systolic blood pressure and diastolic blood pressure were significantly increased from preoperative time to 0 min and 30 min after operation( P<0.01). Compared to the baseline, heart rate was increased before operation( P<0.01)and was decreased at 30 minutes after operation( P<0.01). Conclusions:Blood pressure fluctuation may exceed the safe range with an obvious increase of systolic blood pressure during the current intravitreal injection of anti-VEGF drugs in the patients aged over 80 years.Systolic blood pressure rises significantly before operation and falls back after operation, but it may last till 30 minutes after operation.The range of heart rate change is relatively small.Perioperative management and monitoring measures should be strengthened to reduce the risk of acute cardiovascular and cerebrovascular events.