Objective To develop HPLC method for determination of polyunsaturated fatty acid(PUFA) in breast milk.Method PUFA were extracted from breast milk with mixture of methanol: N-hexane:phosphoric acid(15:25:3).PUFA were derived by phenacyl bromide.The mobile phase was acetonitrile:water(81:19,v/v) at 1.0 ml/min with UV detection at 252 nm and column temperature was 35℃.The analytic column was Hypersil BDS C18(4.6mm?150mm,5 ?m).Results The average recovery was(98?5)% and the relative standard deviation of intra-day and inter-day were limited within 5.9%.Conclusion The method was stable,sensitive and accurate,and suitable for determination of PUFA in breast milk.

[Objective] To study the effect of family sickbed comprehensive nursing mode on patients with stroke.[Methods] 92 cases of discharged patients with cerebral apoplexy were selected between October 2010 and October 2011,and were divided into the observation group(52 cases)and the control group(40 cases).Among them,the observation group received the family sickbed comprehensive nursing intervention,which was conducted by community nurses.The control group received general discharge mode and did not accept community nursing intervention.As designed,patients were followed weekly or monthly after discharge.After three months the treatment efficacy and quality of life were assessed.[Results] After follow-up for 3 months,HAMD,NIHSS scores in the intervention group were lower than those of the control group,MMSE,FMA and BI scores were higher than those of the control group.The physical,psychological,social and environmental scorcs in the intervention group were higher than those in the control group.[Conclusions] Family sickbed comprehensive nursing of cerebral apoplexy patients during rehabilitation stage can not only save medical resources,but also facilitate to recovery of patients.

Objective To evaluate the efficacy of aminolevulinic acid hydrochloride photodynamic therapy (ALA-PDT) combined with multi-function electronic therapeutic device in the treatment of condyloma acuminatum.Methods Sixty cases with condyloma acuminatum were divided into two groups with 30 cases each according to the treatment method.The combination group was treated with ALA-PDT combined with multi-function electronic therapeutic device,and the control group was treated only with multi-function electronic therapeutic device.Once a week,treatment was not more than three weeks.The adverse reaction was observed.The efficacy was evaluated after 1 week's treatment.The recurrence rate was evaluated after 1,6 months' s treatment.Results The cure rate was 80.00％ (24/30) and 96.67％ (29/30) in combination group and control group,and there was no significant difference (P ＞ 0.05).The recurrence rate was 8.33％ (2/24),12.50％(3/24) in combination group and 17.24％ (5/29),41.38％ (12/29) in control group after 1,6 months's treatment,and there was no significant difference after 1 month's treatment (x2 =0.298,P ＞ 0.05),but there was significant difference after 6 months' s treatment (x2 =4.030,P ＜ 0.05).There was no system adverse reaction,the adverse reaction was 16 cases in combination group and 44 cases in control group.Conclusion ALA-PDT combined with multi-function electronic therapeutic device in the treatment of condyloma acuminatum can improve the cure rate,decrease the recurrence rate and adverse reaction.

AIM: To investigate the effects of electrical stimulation of vagus nerve on gut injury following intestinal ischemia-reperfusion in rats. METHODS: 30 adult male Wistar rats subjected to bilateral cervical vagotomy were randomly divided into three groups (n=10 per group): (1) Intestinal ischemia-reperfusion group (group I/R): laparotomy and I/R induced by clamping arteria mesenterica superior for 1 h followed by reperfusion for 2 h. (2) Vagus nerve stimulation group (group VNS): laparotomy, I/R and electric stimulation with pulse train of constant amplitude 5V, pulse width 2 ms and frequency 1 Hz at the left caudal vagus ends for 20 minutes before and after occlusion. (3) Sham control group (group SC): sham operation and sham stimulation. Carotid artery was cannulated for mean arterial pressure (MAP) monitoring. A strip of small intestine was taken from distal end of ileum for light microscopic (LM) and transient electron microscopic (TEM) examination at the time of 2 h after reperfusion. Improved Chiu’s scale was used to quantitatively assay the damage degree. The levels of malondialdehyde (MDA) and TNF-? in plasma were detected. RESULTS: MAP in every group kept steady during ischemia, but decreased gradually with the prolongation in the time of reperfusion. MAP decreased more dramaticly in group I/R than that in group VNS (P

BACKGROUND: Nowadays, more and more people regard the isokinetic training as a method for strength training and rehabilitation of muscle injuries of athletes. But it is rare in study of rehabilitation following joint injury via isokinetic training. OBJECTIVE: To explore the advantage of isokinetic training in rehabilitation, further more, to provide the scientific basis to rehabilitation of muscle injuries. DESIGN, TIME AND SETTING: The contrast observation was performed at the Laboratory of Institute of Physical Education, Hebei Normal University between March and May 2008. PARTICIPANTS: Two female college basketball athletes whose knee joints were injured. METHODS: The Kinitech isokinetic testing system (Kylingk, Australia) was used to test the flexion and extension muscles of knee joint of 2 athletes and contrasted the values of flexion and extension muscle after rehabilitation training, damage side and healthy side. All data were analyzed to observe the effects of strength training. MAIN OUTCOME MEASURES: Peak torque (PT) values of flexor and extensor in knee joints. RESULTS: After 8 weeks isokinetic training, the strength index of two subjects had increased in certain degree both at the 60 (?)/s and 240 (?)/s. The PT values showed that the increasing range of flexor was greater than that of extensor in the 1st subject, but the circumstance was opposite in the 2nd subject. The index of BP, STW, and AP was greatly increased, as well as work fatigue. CONCLUSION: It is helpful to increase the muscle strength and promote the rehabilitation via isokinetic training system. The isokinetic strength training has the positive effects on rehabilitation of muscle injuries.

Objective:To analyze the causes, influencing factors and trends of dead on arrival cases in children′s Hospital in the past 5 years, aiming to provide direction and basis for reducing the dead on arrival cases of children.Methods:We collected the dead on arrival cases in the department of emergency at Shanghai Children′s Hospital from January 2015 to December 2019, classifed and analysed the gender, age, native place, death season, time of death, and possible causes of death, and then studied the correlation between above factors and the cases.Results:A total of 151 dead on arrival cases were collected.The annual number decreased year by year, and boys were more than girls in gender.Most of them were infants under 1 year old, and nonlocal children were more than Shanghai native.The above differences were statistically significant, but there was no significant difference in the distribution of death season and death time.In terms of the cause of death, perinatal diseases accounting for 33.8%(51/151), those accompanied with severe underlying diseases accounting for 39.1%(59/151), accidental death accounting for 14.6%(22/151), unexplained deaths accounting for 12.6%(19/151). Those distribution differences were statistically significant( χ2=32.497, P<0.001). Meanwhile, there were statistic differences in gender and age of the cases with severe underlying diseases( χ2=4.898, P=0.027; χ2=32.169, P<0.001), and the year and age distributions of the accidental death cases also had significant differences( χ2=16.636, P=0.002; χ2=14.727, P=0.002). Conclusion:To reduce dead on arrival cases of children, we should do a good job in perinatal health care and screening, reduce premature birth and birth defects, actively conduct propaganda to prevent children′s accidental injuries, popularize medical first aid knowledge, and strengthen children′s transport system.

Objective To explore the factors related to vasovagal syncope (VVS) in children. Methods The clinical data of 125 children with conifrmed VVS were collected. According to the frequency of syncope during the ifve years from ifrst episode to the time of head-up tilt test, the children with 2 or 3 episodes of syncope were assigned into the low episode group, and the children with 4 or more episodes of syncope were assigned into the high episode group. The two groups were analyzed and compared. Results Among the 125 children, 84 children (67.2%) were in the low episode group and 41 children (32.8%) were in the high episode group. The single factor analysis showed that the age at head-up tilt test, onset of syncopal, causes of syncope, history of carsickness, and positive family history were associated with high attack frequency. The results of non-conditional logistic regression analysis showed that causes of syncope (OR?=?3.723, 95%CI:1.163-11.918, P?=?0.027), history of carsickness (OR?=?5.929, 95%CI:2.066-17.015, P?=?0.001), and positive family history (OR?=?6.794, 95%CI:2.006-23.013, P?=?0.002) were the independent risk factors of high attack frequency. Conclusions The causes of syncope (excluding persistent standing), history of carsickness, and positive family history have important clinical signiifcance in predicting high attack frequency of VVS in children.

Ohjective To investigate the associations between the Arg389Gly polymorphism of the β_1-adrenergiecreceptor gene (ADRB1) and vasovagal syncope (VVS) in Chinese children. Methods Genotype of ADRB1 was determined by polymerase chain reaction-restriction fragment length pelymorphism analysis. Case-control studies and quantitative trait analysis were carried out by comparing between carriers (one or two copies of the Gly389 allele) and non-carriers (Arg389 genotype) of the ADRBI in 54 patients with unexplained syncope and in 54 healthy control subjects. Patients were subdivided into two groups according to head up tilt test (HUTT) : positive HUTT, known as VVS group and negative HUTT group. Distribution of Arg389Gly genetype in VVS group and the relationship to three clinical patterns were also analyzed. Results An allele frequency of Arg389 was 73.15% and Gly389 was 26.85% in healthy subjects. Higher Gly389 allele frequency was found in VVS group (n = 30) than that in negative HUTT group (33.33% vs. 14.58%, P < 0.05). In VVS group, the frequencies of the Gly389 allele in cardioinhibitory pattern (n = 6), mixed pattern (n = 9) and vasodepressor pattern (n = 15) was 66.67%, 33.3% and 23.33%, respectively, which had significant differences between the cardioinhibitory pattern from any of the other two patterns (both P < 0.05). Conclusions An association of positive HUTT with a single nucleotide pelymorphism of Gly to Arg switch at position 389 of the ADRB1 was found. This polymorphism may contribute to susceptibility to VVS.

Objective To explore the effects of estrogen on oxidative stress of the lung tissue induced by acute paraquat (PQ) poisoning. Methods Thirty-two male adult New Zealand rabbits were randomly divided into model group and estrogen intervention group, 16 rabbits in each group. The model of lung injury induced by PQ poisoning was reproduced by feeding 16 mg/kg of 20% PQ through gastric tube. The rabbits in estrogen intervention group received intravenous infusion of 5 mg/kg estrogen after PQ challenge for 7 days, and the rabbits in model group received an equal volume of normal saline. Three rabbits in each group were sacrificed at 1, 2 and 3 days respectively after exposure. The lung tissue was harvested, the levels of reactive oxygen species (ROS) was determined by 2',7'-dichlorofluorescin diacetate (DCFH-DA), malondialdehyde (MDA) was determined by thiobarbituric acid (TBA), the mRNA expression of manganese-containing superoxide dismutase (MnSOD) was determined by reverse transcription-polymerase chain reaction (RT-PCR), and adenosine triphosphatase (ATP) content in mitochondrion was determined by enzyme linked immunosorbent assay (ELISA). The pathological changes in lung were observed under light microscopy using hematoxylin and eosin (HE) staining, and the lung injury was evaluated with lung injury score. Results The contents of ROS and MDA in lung within 3 days after PQ poisoning were gradually increased, and MnSOD mRNA expression and ATP content were gradually decreased. Estrogen intervention could significantly reduce the production of ROS and MDA after PQ poisoning [3-day ROS (fluorescence intensity): 161.05±30.04 vs. 188.30±31.80, 3-day MDA (mmol/L): 98.71±0.92 vs. 122.12±1.24], up-regulate MnSOD mRNA expression (integral A value: 3.05±0.90 vs. 1.22±0.24), and increase ATP content in mitochondrion (ng/L: 3.75±0.92 vs. 2.28±0.29) with statistically significant differences (all P < 0.01). In lung tissue after PQ poisoning, congestion, edema, focal pulmonary consolidation, pulmonary interstitial and alveolar space were infiltrated by a large number of neutrophil, alveolar interval were thickened obviously and the above phenomenon were most serious at 3 days after poisoning as shown under optical microscope. Estrogen intervention could significantly improve lung injury as compared with that of model group, and the lung injury score at 3 days was significantly lower than that of model group (11.8±0.7 vs. 13.5±1.0, P < 0.01). Conclusions The oxidative stress indicators in the lung tissue after PQ poisoning were obviously abnormal, the pathological damage was serious with time dependence. The administration of estrogen can reduce acute lung injury after PQ poisoning by reducing the oxidative stress.

Objective To investigate the effects of high-frequency repetitive transcranial magnetic stimulation (rTMS) at different intensities on the ultrastructure of an ischemic brain penumbra and the expression of brainderived neurotrophic factor (BDNF) using rats with permanent middle cerebral artery occlusion (MCAO).Methods Forty-two rats were randomly divided into a blank control group,an MCAO model control group,a sham stimulation control group and an rTMS group.The rTMS group was divided further into 3 subgroups:an 80％ of motor threshold (MT) subgroup,a 100％ of MT subgroup and a 120％ of MT subgroup.The cerebral infarction model was established by right MCAO.rTMS treatment was given 24 hours after the MCAO model was successfully established.The rTMS group and sham stimulation control group were given 20 Hz rTMS with the planned intensities.The MCAO model control group was not given any stimulation.After 14 days of treatment,transmission electron microscopy,immunohistochemical and Western blotting ( WB ) methods were used to investigate the ultrastructure of the ischemic penumbra and the expression of BDNF.Results Damage reflected in the ultrastructure in the 3 rTMS subgroups was less than in the model control group and the sham stimulation control group.Expression of BDNF protein increased significantly in 100％ of the MT group and blank control group rats as compared with that in the sham stimulation control group,while the blank control group and the 3 rTMS subgroups had no statistically significant difference in comparison with the MCAO model control group.The expression of BDNF protein had no statistically significant difference between any of the groups.Conclusion 20 Hz rTMS might,especially at 100％ of the MT,promote the recovery of the ultrastructure of neural tissues in the ischemic penumbra after acute cerebral infarction and enhance the expression of BDNF in the ipsilesional hemisphere.This may be one of the important mechanisms of rTMS's effectiveness in the treatment of ischemic stroke.