Electromagnetic Fields ; Environmental Exposure ; Humans ; Radiation Dosage ; Threshold Limit Values

Atlanto-axial complex is the most important functional unit of the cervical spine.Atlanto-axial instability or dislocation,one of the most serious pathologies in spinal surgery,is often managed by posterior atlantoaxial fixation and fusion.Several posterior fixation techniques have been used to stabilize the atlanto-axial complex,including wire/cable-bone fixation,Halifax clamps,transarticular screw fixation,screw-plate fixation and screw-rod fixation.For atlanto-axial dislocation that cannot be reduced with skull traction before operation,intraoperative reduction is often needed.Current intraoperative reduction techniques can be classified into transoropharyngeal surgical release followed by posterior reduction and fixation,transoropharyngeal reduction and fixation,and posterior reduction and fixation using screw-rod system according to approaches.Furthermore,posterior reduction can be performed using elevating-pull,leverages,and cantilever techniques.This study reviews the intraoperative reduction and fixation techniques mentioned above.

The C3 cleavages of human blood kept at different temperatures in vitro were studied. In 14 autopsy cases, the postmortem intervals(PMI) were estimated based on the C3 cleavage rates and the rectal temperatures. The 95% confidence of predicting PMI was?11 hours. The phenotyping of C3 could be achieved while the C3 cleavage rate was measured. It is suggested that it is useful for the personal identification of unknown corpses.

OBJECTIVE:To establish an LC-MS method for the determination of the ritodrine content in human plasma.METHODS:The determination was performed on Agilent Eclipse Plus C18 column with the column temperature kept at 40 ℃.The mobile phase consisted of methanol-water(95∶5,containing 0.02 mol?L-1 ammonium formate)with a flow rate of 0.5 mL?min-1.The extraction agent was acetic ether-dichloromethane(4∶1).A triple quad mass spectrometer system equipped with an electro spray ionization ion-trap source was used as the detector and operated in the positive ion model.Selected reaction monitoring(SRM)was employed to detect ritodrine(m/z 288.2→121.1)and the internal standard dobutamine(m/z 302.1→107.0).RESULTS:The linear range of ritodrine was 0.25～100 ng?mL-1(r=0.999 1),with the lower limit of quantification at 0.25 ng?mL-1.Both the intra-day RSD and inter-day RSD were less than 15%.The methodological recovery was 98.00%～103.44%.CONCLUSION:The method is sensitive,accurate,reproducible,specific and suitable for the pharmaceutical study of ritodrine.

Objective: To develop a novel method using high-performance capillary electrophoresis coupled with DAD (HPCE-DAD) for the simultaneous determination of 10 phenolic compounds (luteolin-7-O-glucoside, rutin, quercetin-3-glucoside, quercetin-3- rhamnoside, salicylic acid, luteolin, kaemferol, quercetin, gallic acid, and protocatechuic acid) in Bidens bipinnata. The extraction efficiency of above mentioned compounds was compared using six different ethanol/water solutions. Methods: The effects of pH value and concentration of buffer, applied voltage, and temperature on the separation were researched. The 10 compounds were baseline separated within 16 min in a 60 cm length capillary at a separation voltage of 25 kV with a running buffer consisting of 25 mmol/L borate (pH 9.5) at wavelength of 214 nm. Results: Excellent linearities of luteolin-7-O-glucoside, rutin, quercetin-3-glucoside, quercetin-3-rhamnoside, salicylic acid, luteolin, kaemferol, quercetin, gallic acid, and protocatechuic acid were observed at 5.0-120, 5.0-120, 5.0-120, 5.0-120, 1.0-120, 2.5-120, 5.0-120, 2.5-120, 2.5-120, and 2.5-120 mg/L, respectively. The detection limits were at 2.5, 2.5, 2.5, 2.5, 0.5, 1.0, 2.5, 1.0, 1.0, and 1.0 mg/L, respectively. The relative standard deviations (RSD) of precision were below 5.17% (n = 6). The mean recoveries for 10 phenolic compounds in B. bipinnata ranged from 94.4% to 105.8%, with RSD values of 0.32%-4.33%. Conclusion: The contents of luteolin-7-O-glucoside, rutin, quercetin-3- glucoside, quercetin-3-rhamnoside, salicylic acid, luteolin, kaemferol, quercetin, gallic acid, and protocatechuic acid in B. bipinnata are 95.04-105.84, 78.03-110.45, 96.45-177.96, 178.78-300.00, 62.06-66.54, 71.08-72.85, 77.39-95.30, 68.27-77.43, 68.47- 88.47, and 107.24-142.43 μg/g, respectively.

[Objective]To explore the clinical effect of cervical spondylotic radiculopathy treated with intervertebral foramen block and brachial plexus traction-like technique.[Methods]54 cases of cervical spondylotic radiculopathy were randomly divided into two groups,i.e.control group(cervical traction and brachial plexus traction-like technique) and treatment group(added with intervertebral foramen block).[Results]The cure rate and effective rate were 66.67% and 92.59% in treatment group,and 25.93% and 78.78% in control group,respectively.Clincal efficacy is significantly better in treatment group than that in control one(P

Acupuncture Therapy ; Humans ; Meridians ; Muscles ; physiopathology ; Nervous System Diseases ; physiopathology ; therapy

Objective To investigate the decreasing pattern of activities of daily living (ADL) in patients with dementia. Methods A total of 204 patients with dementia were collected,among which 106 cases were with Alzheimer's diseases(AD),54 cases with vascular dementia(VD),44 cases with other types of dementia.According to the scores of mini-mental state examination(MMSE),mild,moderate and severe dementia were 42 cases,37 cases and 125 cases,respectively.All of them were assessed by Barthel index(BI) and compared among degrees of dementia,between AD and VD,and levels of education. Results The most reserved items were bowel movement (48.5 ％),urination (44.1 ％) and grooming (40.2％),while the most vulnerable items were climbing stairs (25.5％) and bathing(18.1％).With increasing impairment of cognition,the scores of BI were getting decreasing. There were significant differences among severe [(23.20 ± 29.27)scores],moderate[(65.54 ± 26.35) scores] and mild [(87.38 ± 22.69) scores] groups (x2 =99.686,P =0.000). Basic ADL were more reserved in AD (16.98％-53.77％) compared with VD (1.85％-33.33％) patients.No significant differences were found(x2 =3.653,P=0.161)among patients with education of primary school and below [(40.1 ± 39.0) scores],middle school[(45.3 ± 39.6 ) scores],and high school and above[(53.1 ± 37.7) scores]. Conclusions Among patients with dementia,bowel control,bladder control and grooming are well reserved,climbing stairs and bathing are vulnerable functions.Basic activities of daily living may be affected by cognitive status and the types of dementia but not levels of culture.

Electromagnetic Fields ; Threshold Limit Values

SO rats.Alveolar septa in IHPH increased significantly than in PHPH,PCS and SO rats.Alveolar capacity in IHPH decreased more than those in PHPH, PCS and SO rats.There was no significant difference in lattice fibers,collagenous fibers and elastic fibers between the 4 groups.Conclusion CCL 4 induced IHPH rats have the alterations in blood gas and lung structural pathology characteristic of hepatopulmonary syndrome commonly seen clinically in cirrhotic portal hypertensive patients .