Objective To explore the effect of 3-month-exposure to high altitude(4400 m) on military cognitive func-tion.Methods Using pre-post paired t-testdesign, thirty-seven male recruits were enrolled , eight cognitive function variables, including reaction time, speed-perception, time-perception, operating-dexterity, memory span, depth-percep-tion, short-term memory and attention span , were analyzed by paired comparison .Results After 3-month-exposure to 4400 m high altitude, movement time (P<0.05) was shortened, speed-perception became more accurate (P<0.05),memory span and short-term memory both declined slightly(P<0.05), and the errors in depth perception deteriorated (P<0.05). Moreover , the depth-perception was more prone to′see close′.Conclusion During the 3-month-exposure to higher altitude environments , many of the cognitive functions of soldiers may be damaged to different extents , and the negative effect on re-action and movement time , depth-perception and memory is more remarkable .

Adolescent ; Child ; Child, Preschool ; Critical Care ; Fatty Acid-Binding Proteins ; blood ; metabolism ; urine ; Female ; Gastrointestinal Diseases ; blood ; urine ; Humans ; Male ; Metabolic Diseases ; blood ; urine

Purpose: To confirm the therapeutic effects of thyrotropin-releasing hormone(TRH) on the experimental spinal cord injury. Method: Wistar rats were subjected to incomplete spinal cord injury using the modified Allen method. The effects were observed by means of neurologic scoring, quantitative enzyme histocytoehemistry、quantitative immunohistocytochemistry and electron microscopy. Results: 1) The treated group exhibited significantly higher scores than the control group. 2) Acetylcholinesterase (AchE) activity of anterior horn cells in the treated group was higher than that of the control group invarious time, and its activity restored to normal level two weeks after injury; Acid phosphatase(AePase) activity was lower than that of the control group in various time. and its activity restored to normal level four weeks after injury. The content of Nissl's bodies in anterior horn cells in the treated group was higher than that of the control goup one week after injury. 3)The number of axon in a certain area of spinal white matter in the treated group was more than that of the control group. 4)Ultrastructural observation showed that both the nerve tissue injury and the extent of hemorrhage were milder in the treated group than that of the control group. Conclusion: The therapeutic effects of TRH on the spinal cord injury" are shown not only in the improving recovery of motor function, but also in the morphology.

Acetates ; Chemical Industry ; statistics & numerical data ; China ; Occupational Exposure ; prevention & control

Thanks to the three decades of reform and opening up,hospitals in China have made tremendous achievements in their development,yet facing new ehallenges as well.to address these challenges,there is an urgent need for these hospitals to further their reform under the guideline of the scientific concept of development.This will help them strengthen their hospital culture,quality control,technology,human resources development,and their leadership,in order to achieve a better and faster growth,better serving the role to build a harmonious socialist society.

Objective To investigate the influence of biological rhythm on labor pain,epidural analgesia and delivery mode in parturients.Methods In this retrospective cohort study,3 571 Chinese nulliparas with term singleton cephalic pregnancy who were preparing to deliver vaginally and receive epidural analgesia,were included.Parturients were divided into four groups according to the beginning time of analgesia,i.e.,morning group (7:01 to 13:00,n=955),afternoon group (13:01 to 19:00,n=1 159),evening group (19:01 to 1:00,n=763),and night group (1:00 to 7:00,n=694).Pain scores were assessed using a numeric rating scale (NRS) before and after epidural analgesia.Delivery mode,incidence of adverse events and neonatal outcomes were also compared among the four groups with monovariance analysis,LSD,Chi-square test or Fisher's exact test,Bonferroni,General Linear Model (GLM) and Logistic regression analysis.Results (1) The NRS pain scores of morning,afternoon,evening and night groups before analgesia were 8.6± 1.0,8.8± 1.0,8.9± 1.0 and 8.7± 1.0,respectively.After adjusted by GLM,the NRS pain scores of the four groups were 8.6±0.0,8.8 ± 0.0,8.9±0.0 and 8.7±0.0,respectively.Univariate and multivariable analyses showed that pain scores before analgesia were higher in afternoon group than in morning group (P＜0.01),and they were significantly higher in evening group than in morning and night groups (all P＜0.05).(2) At 10 and 30 minutes after epidural analgesia,the NRS pain scores of the four groups were 4.3± 1.0 and 1.8±0.9,4.8± 1.0 and 2.1 ±0.9,4.9± 1.1 and 2.2± 1.0,and 4.4± l.l and 1.8± 1.0,respectively,which were also significantly higher in afternoon and evening groups than in morning and night groups (all P ＜ 0.01 or 0.05) ; and the proportions of analgesia satisfaction (NRS pain score ≤ 3) were 19.7％ (188/955) vs 97.4％ (930/955),11.6％ (134/1 159) vs96.0％ (1 113/1 159),11.3％ (84/743) vs95.2％ (707/743),18.7％ (130/694) vs 95.6％ (670/694),respectively,which were significantly lower in afternoon and evening groups than in morning and night groups (all P＜0.01 or 0.05).(3) Delivery mode,incidence of adverse events and neonatal outcomes were similar among the four groups.Conclusions More severe labor pain before analgesia occur in parturients who receive epidural analgesia in the afternoon and at night,and less efficient analgesia and a lower rate of satisfaction are observed at 10 and 30 minutes after analgesia.However,delivery mode,neonatal outcomes and incidence of adverse events are not influenced by biological rhythm.

Objective To investigate the effect of indomethacin on prevention of heterotopic ossification (HO)after operative treatment of acetabular fractures.Methods Fifty patients with acetabular fractures received in our department operative treatment through Kocher-langenbeck(K-L)approach and oral administration of in- domethacin afer operation from February 2001 to August 2003.Forty-eight of them were successfully followed up for incidence of HO and their clinical functions were assessed.The results were compared with those of 40 patients who had been treated with the same operative procedures but without oral administration of indomethacin in our depart- ment from March 1993 to May 1998.The patients who could not tolerate the drug were not included.Results The follow-ups averaged 22.8 months(range,6 to 39 months).HO occurred in eight cases.The incidence of HO was 16.7%(8/48).According to Brooker evaluation of HO,five cases were rated as degreeⅠ,three as degreeⅡ, and none as degreeⅢorⅣ.The incidence of severe HO was 0.In the control group,the incidence of HO was 35.0%(14/40)and the incidence of severe HO was 10.0%(4/40).The differences were statistically significant (P＜0.05).Conclusion Oral administration of indomethacin after operative treatment of acetabular fractures can inhibit HO.

Objective To evaluate the value of 99Tcm-MDP uptake by left femoral neck for diagnosing osteopomsis.Methods A total of 58 cases (23 males,35 females,mean age:(66.15±8.45) years) with spondyloarthmpathies from May to December of 2012 were selected.Serum concentrations of type Ⅰ collagen telopeptide (sCTX-1) and bone ALP (BALP) were determined.All patients underwent dual-energy X-ray absorptiometry (DXA) to detect bone mineral density (BMD).According to the T scores,patients were divided into 2 groups:normal group (NG) (T＞-1.0) and osteoporosis group (OG) (T≤-2.5).99TcmMDP bone scan was further performed.The average radioactive ratio of the left femoral neck to the medial soft tissue of left femur (T/N) was measured.Data differences between the 2 groups were compared by twosample t test and Pearson correlation analysis.Results According to BMD,13 patients (7 males,6 females) were included in NG and 28 patients (10 males,18 females) were included in OG.The mean ages of OG and NG were significantly different ((68.82± 10.41) years vs (62.46± 11.77) years; t =3.560,P＜0.05).The BMD of left femoral neck in OG was significantly lower than that in NG ((0.67±0.08) g/cm2 vs (0.91±0.10) g/cm2 ; t=9.917,P＜0.01).Although BALP level of OG was significantly higher than that of NG ((35.92±11.58) U/L vs (22.38±6.34) U/L; t=-3.397,P＜0.05),no significant difference was observed on sCTX-1 between the 2 groups (t=-0.463,P＞0.05).T/N ratio of OG (11.63±6.22) was higher than that of NG (9.74±4.44) (t =-3.027,P＜ 0.05).There were significant correlations between the T/N ratio of the left femoral neck and the sCTX-1 and BALP concentrations (r=0.376,0.483,both P＜0.01).No correlations between the T/N ratio of the left femoral neck and age,BMI and BMD were observed (r=-2.031,-0.017,0.134,all P＞0.05).Conclusion The uptake ratio of the left femoral neck in 99Tcm-MDP bone scan could evaluate the metabolism of bone,and it is useful for the early diagnosis of osteoporosis.

Objective To evaluate the respiratory mechanics and inflammatory status in elderly patients with stable chronic obstructive pulmonary diseases (COPD).Methods The arterial blood gases (ABGs),respiratory drive and its derivatives,mechanics of respiratory muscles,resistance and compliance of airway,interleukin-8 (IL-8)and interferon-?(IFN-?)were measured in 42 cases withstable COPD and 40 subjects of normal control.Results The elderly patients with stable COPD had great changes in the following parameters while compared with the control group:peak inspiratory pressure(PIMAX) [(4.48?2.11)vs(6.10?2.91)kPa],maximum expiratory pressure (PEMAX)[(6.30?3.20)vs(9.15?93.30)kPa],0.1s mouth occlusion pressure(P_(0.1)) with its correction index,airway resistance,compliance,ABGs,the levels of IL-8[(218.46?91.14) vs (161.84?14.40)ng/L]and IFN-?[(2435.82?639.92)vs(1652.40?95.08)ng/L],which might aggravate the progress of COPD consistently.Conclusions The elderly patiends with stable COPD has marked changes in respiratory drive,airway resistance,and airway compliance,respiratory mechanic and inflammatory status.The intervention should be performed in the elderly stable COPD patients.

To investigate the electrophysiologic characteristics of f-wave amplitude and to evaluate its role in development and persistence of chronic atrial fibrillation (AF) associated with rheumatic heart disease (RHD). Methods: Epicardial mapping was performed in 44 patients with chronic AF of RHD who underwent heart valve surgery. Ten patients with supraventricular tachycardia served as the control group. Results:The f-wave amplitude of left atrium (LA) and middle and low LA posterior regions were significantly lower than those of the control group. The f-wave amplitudes of the upper, middle and low sections in LA posterior region were significantly lower than those in right atrium (RA) (P<0.05). The f-wave amplitudes were compared before and after electrocardioversion in 14 patients with chronic AF. The mean atrial electrogram amplitude during sinus rhythm was significantly higher than that during AF (P<0.01).The f-wave amplitude in left appendage was higher than that in LA posterior region (the upper,middle and the lower part),P<0.05.The f-wave amplitude in the upper section of LA was significantly higher than that in the middle section. The f-wave amplitude in AF group was not correlated to the diameter or volume of both atria. Conclusion: There are amplitudes differences between the upper, middle and lower LA,suggesting that the middle and lower sections of LA posterior wall may be the region producing anisotropy and reentrant circle.