Objective: To study the effect of low-dose dopamine on splanchnic DO_2/VO_2.in rabbit SMAO shock Method:Twenty rabbits were randomly devided into two groups:group A with dopamine,group B as control group. In group A dopamlne was infused at a rate of 5?g?kg~(-1)?min~(-1). SMAO shock model was induced in both groups. Cardiac output index(Cl),portal venous blood flow index (QpvI),mean arterial pressure (MAP),arterial. artiaI and portal venous blood gas analysis.arterial and portal venous serum lactate concentrations(ALT,PLT), total oxygen delivery/oxygen consumption (TDO_2/TVO_2), splanchnic oxygen delivery/oxygen consumption (SDO_2/SVO_2). oxygen extraction ratio(O_2ER) were measured respectively. Result: QpvI, SDO_2,SVO_2 were higher in group A than those of group B (P0.05). CI,MAP, TDO_2/TVO_2 decreased. TO_2ER and SO_2ER increased in both of groups during shock, but without significant differences between both groups. Conclusion: Low-dose dopamine has beneficial effects by increasing portal venous blood perfusion and improving splanchnic oxygenation during SMAO shock in rabbits. but no effects on systemic oxygenation of shock.

A certain amount of potassium chloride is required to correct the hypokalemia occuring commonly during perioperation,but the overdosage may be harmful. To investigate the proper dose of KCl,40 adult rabbits were randomly and evenly assigned to be intravenously infused with normal saline(group Ⅰ),or saline containing 4,25 or 50 mmol/L KCI (group Ⅱ,Ⅲ,Ⅳ),at rate of 10 ml?kg~(-1)?h~(-1) during operation respectively. As compared with those before operation,the serum level of potassium decreased significantly in group Ⅰ and Ⅱ, changed unsignificantly in group Ⅲ,and increased in group Ⅳ during and after operation;the potassium amounts in liver and skeletal muscles increased markedly after operation. S-T segment was depressed in group Ⅰ and Ⅱ,T wave became peaked in group Ⅳ, and ECG remained normal in group Ⅲ. it is indicated that intravenous KCl infusion at concentration 25 mmol/L and rate of 10ml?kg~(-1)?h~(-1) may properly correct the hypokalemia during perioperation,and the occurance of perioperatine hypokelemia may be related to the uptake of liver and skeletal muscles

Ten mongrel dogs,divided randomly into a control group (A) and a cerebroplegia group (B) ,were supported by closed-chest cardiopulmonary bypass,subjected to 2 hours of hypothermic circulatory arrest at 18 C. In group B, oxygenated asanguineous solution 50ml/kg was infused into the carotid artery at the onset of arrest. and 10 ml/kg was supplemented every 30 minutes during 2hours arrest. Nothing was infused in group A. Then all animals were rewarmed to 37 C and killed 6 hours later At five time points cerebral cortex was collected to study adnosine triphosphate (ATP),malondialde hyde (MDA) and ultrastructure. Electroencephalography (EEG) was recorded continuously. In group A, ATP content decreased gradually from the beginning of arrest to the end of the experiment (P

Objective To determine the role of adenosine A1 receptor system in the delayed protective effects of ischemic preconditioning(IPC) in brain ischemia.Methods Thirty-five rabbits weighing 2-2.5kg were randomly divided into 7 groups: control (group Ⅰ), 3-min ischemia (group Ⅱ), 10-min ischemia (group Ⅲ), IPC (group Ⅳ), N6-cyclopentyladenosine (CPA)(group V), 8-cyclopentyl-1,3-dipropylxanthine (DPCPX)+ IPC(group Ⅵ), and DPCPX+3-min ischemia (group Ⅶ).Cerebral ischemia was produced by occlusion of both carotid arteries in combination withdrawing blood to maintain MAP at 35-40 mmHg.After 3-min IPC and 3 days of recovery , cerebral ischemia was induced and lasted 10 min (model of delayed protective effects of IPC). Adenosine A1 receptor agonist CPA or antagonist DPCPX was used instead of IPC to evaluate the role of adenosine A1 receptor in the delayed protective effects of IPC.The expression of heat shock protein 70 (HSP70) was analyzed by immunohistochemistry.Neurons density and expression of HSP70 in the hippocampal CA1 region were examined and measured 3 days later.Results (1) CPA could reduce cerebral ischemic injury, but the effects of CPA were not as good as those of IPC (about 70% of IPC).After adenosine A1 receptors being blocked by DPCPX the delayed protective effects of IPC disappeared.(2) 3-min ischemia alone did not cause neuronal injury but induced obvious expression of HSP70.DPCPX not only could make 3-min ischemia cause injury but also reduce the expression of HSP70.Conclusions (1) The delayed protective effects of IPC is related with activation of adenosine A1 receptor system.(2) One of the mechanisms of the blocking effects of DPCPX may be due to the reduction in expression of HSP70 .

OBJECTIVETo explore the relationship between the temperature and time in moxa cone moxibustion with different purities of moxa.

METHODSAccording to the purities, the moxa were divided into a 10 : 1 group, a 20 : 1 group, a 30 : 1 group and a 40 : 1 group, 30 moxa cones in each group. With the VICTOR DM6902 electronic thermometer, the temperature of the undersurface center at different time points during the moxa cone moxibustion with different purities of moxa was measured. Once the moxa cone was ignited, the results were recorded at the end of each second. Also the temperature peak of the undersurface center and the time when the peak occurred were recorded.

RESULTThe undersurface temperature was increased in all the groups; the time of moxa cone reaching the lowest peak temperature was significantly different in all the groups (all P<0. 05), which was the 10 : 1 group, 20 : 1 group, 30 : 1 group and 40 : 1 group from slow to fast. 50 s, 60 s, 70 s, 80 s and 90 s after moxa cone was ignited, the temperature of moxa cone at the same time point was significantly different in all the groups (all P<0. 05), which was the 10 : 1 group, 20 : 1 group, 30 : 1 group and 40 : 1 group from slow to fast. Conclusion Among the moxa with purity of 10 : 1, 20 : 1, 30 : 1, and 40 : 1, the temperature change rate of the low-purity moxa cone is smaller than that of higher purity, and the stimulating duration of the former is longer than the latter. It is believed that the moxa with purity of 40 : 1 is suitable for scarring moxibustion; the moxa with purity of 30 : 1 and 20 : 1 is suitable for the non-scarring moxibustion; the moxa with purity of 10 : 1 is suitable for gentle moxibustion therapy. The high-purity moxa can also be applied to the field of the low-purity moxa.

Acupuncture Points ; Artemisia ; chemistry ; Humans ; Moxibustion ; instrumentation ; methods ; Plant Leaves ; chemistry ; Temperature ; Time Factors

The purpose of this paper was to find a safe and effective concentration of lido- caine in intravenous combining anesthesia.33 cases had been maintained with the intravenous instillation of 0.5% lidocaine and 0.1% scotine the lidocaine concentrations at the period of after introduction,30＇,60＇,90＇,120＇and recovery were measured respectively.The safty and effective range of this drug would be 2.1—5?g/ml. Also,in this paper,the relationship between the rate of instilation and the concentration of Lidocaine was studied.There was a positive correlation between the drope per minute amd the concentration during the period of the first 60 minutes. After 90 minutes from the beginning,there was no linear correlation.If we want to maintain the safty and effective blood concentration(2.1—5?g/ml), the necessary rate of instillation is 46?10 drops/minute during the first 60 minutes and 27.8?5 drops/minute after 90 minutes.This result shows that lidocaine is easy to accumulate obviously in the body.If we want the patient to recover at the time of the operation just performed,we must stop this drug 50 miuutes before the operation is finished.

OBJECTIVE: To determine the relationship between uroflowmetry and age, the course of disease, premicturition volume, transition zone index and proportion of stroma-to-epithelium in benign prostate hyperplasia (BPH) patients. METHODS: Eighty-nine BPH patients in our hospital from 2000 to 2003 were evaluated. With the CMM3 pathology image analysis system, transrectal ultrasound and Dantec 2000 urodynamic instrument, the value of influence factors was determined. A linear regression was applied to analyze all the data by SPSS software. RESULTS: The flow rate was correlated to premicturition volume ( r = 0. 477, P < 0.01) and proportion of stroma-to-epithelium significantly ( r = - 0.437, P < 0.05) , but was not correlated to the age, the course of disease and transition zone index significantly. The parameter of flow rate/premicturition volume had no difference in 3 micturitions in all patients. CONCLUSION The parameter (flow rate/premicturition volume)could be used to evaluate the micturition status of the BPH patients whose bladder volume is less than 200 ml. We should pay more attention to receptor blockers when we treat BPH patients.
Aged ; Circadian Rhythm ; Humans ; Male ; Middle Aged ; Prostatic Hyperplasia ; physiopathology ; Urination ; physiology ; Urodynamics ; physiology

Airway remodeling is an important pathological feature of asthma and the basis of severe asthma. Proliferation of airway smooth muscle cells (ASMCs) is a major contributor to airway remodeling. As an important Ca(2+) channel, transient receptor potential vanilloid 1 (TRPV1) plays the key role in the cell pathological and physiological processes. This study investigated the expression and activity of TRPV1 channel, and further clarified the effect of TRPV1 channel on the ASMCs proliferation and apoptosis in order to provide the scientific basis to treat asthmatic airway remodeling in clinical practice. Immunofluorescence staining and reverse transcription polymerase chain reaction (RT-PCR) were used to detect the expression of TRPV1 in rat ASMCs. Intracellular Ca(2+) was detected using the single cell confocal fluorescence microscopy measurement loaded with Fluo-4/AM. The cell cycles were observed by flow cytometry. MTT assay and Hoechst 33258 staining were used to detect the proliferation and apoptosis of ASMCs in rats respectively. The data showed that: (1) TRPV1 channel was present in rat ASMCs. (2) TRPV1 channel agonist, capsaicin, increased the Ca(2+) influx in a concentration-dependent manner (EC50=284.3±58 nmol/L). TRPV1 channel antagonist, capsazepine, inhibited Ca(2+) influx in rat ASMCs. (3) Capsaicin significantly increased the percentage of S+G2M ASMCs and the absorbance of MTT assay. Capsazepine had the opposite effect. (4) Capsaicin significantly inhibited the apoptosis, whereas capsazepine had the opposite effect. These results suggest that TRPV1 is present and mediates Ca(2+) influx in rat ASMCs. TRPV1 activity stimulates proliferation of ASMCs in rats.

OBJECTIVETo observe the changes of intestinal flora in diarrhea type irritable bowel syndrome with Pi-wei dampness-heat syndrome (IBS-PDS).

METHODSThe seven kinds of common intestinal bacteria in feces, including enteri bacillus, enterococci, saccharomycete, bifid bacteria, lactobacillus, bacteroides and peptococcus were studied in 21 patients suffered from IBS-PDS, and compared with those in 22 patients with IBS with deficiency of Pi syndrome (DPS) and 25 healthy subjects as control.

RESULTSAs compared with the healthy subjects, the levels of enteri bacillus and enterococci were significantly increased (P<0.01), the levels of bifid bacteria, Lactobacillus and Peptococcus were significantly decreased (P < 0.01), and saccharomycete and Bacteroides were insignificantly different in patients with PDS. As compared with patients with DPS, the levels of enteri bacillus, enterococci, bifid bacteria, Lactobacillus, Peptococcus and Bacteroidaceae were significantly increased except the level of saccharomycete.

CONCLUSIONThere may be alteration of intestinal flora in patients with IBS-PDS.

Adult ; Bifidobacterium ; isolation & purification ; Diagnosis, Differential ; Diarrhea ; etiology ; microbiology ; Enterobacteriaceae ; isolation & purification ; Female ; Humans ; Intestines ; microbiology ; Irritable Bowel Syndrome ; complications ; microbiology ; Lactobacillus ; isolation & purification ; Male ; Medicine, Chinese Traditional ; Middle Aged

Objective: To investigate the prevalence of video display terminal syndrome (VDT) among medical students in university, and to explore the correlation between VDT syndrome and depressive symptoms, so as to provide theoretical guidance for promoting college students mental health. Methods: A total of 3 265 freshmen and juniors in the Department of Medicine of Nanchang University were surveyed with census method in November 2019 to collect information regarding general information, symptoms related to VDT syndrome, depression status. Results: In the valid questionnaire, the detection rate of VDT syndrome among college students was 33.3%, and the detection rates of VDT syndrome varied significantly by sex and clinical major( χ 2=6.45, 18.82 , P <0.05); The detection rate of depressive symptoms was 54.6%. One way ANOVA showed that there was significant differences in VDT syndrome status between those with and without depression symptoms ( χ 2=63.88, P < 0.01 ). Multivariate Logistic regression showed that VDT syndrome could increase the risk of detecting depression ( OR=1.84, 95%CI=1.58-2.14, P <0.01). Conclusion VDT syndrome has a high detection rate in college medical students and is a risk factor for depression in medical students. Society and schools should pay attention to health education on the rational use of video terminals for medical students, and take corresponding measures to intervene, so as to improve the physical and mental health of medical students.