Epilepsy ; chemically induced ; Humans ; Poisoning ; physiopathology ; Xylenes ; poisoning

Objective To establish a method of gas chromatography with head-space sampling for determination of five residual solvents ( acetone, ethyl acetate, isopropanol, dichloromethane, acetonitrile ) in raw material drug of cefotiam hexetil hydrochloride. Methods Agilent DB-624 capillary column(30 m×0.53 mm,3.0 μm)was used,with FID served as detector and DMF as the solvent. Results Linear relationships were obtained for the 5 residual solvents in their respective concentration ranges ( r=0.999 6-0.999 9,n=5) ,and the detection range was from 0.071 to 0.847μg. The stabilities measured as relative standard deviations ( RSD) for the 5 residual solvents were from 0.40% to 2.12% ( n=3) . The average recovery rates were 99.03% to 103.33%,and RSD were 0.54% to 3.41% ( n=3) . Conclusion The method is simple,sensitive and accurate for the residual solvent analysis in raw material drug of cefotiam hexetil hydrochloride.

Objective To investigate the fall-related knowledge and behaviors and ways after injury by chief caregivers of inpatients with neurological disease.Method We designed a questionnaire of fall-related knowledge,behaviors and ways after injury and used it among 208 chief caregivers of inpatients with neurological disease.Results On fall-related knowledge,the three items with the lowest scores about fall-related knowledge included fall-related medicine,postural hypotension and abnormal excretion.Of fall-prevented behaviour score,the lowest 3 items were three steps for getting up,placing things correctly and using wheelchair protection derive.Of the inquiry and fall measures score,the lowest 3 item were helping the patient up,observation and prevention after fall.There were significant differences in the total scores on education,time for taking care of the patients,history of fall and health education on fall (P＜0.05).The scores of those with education of senior middle school,college or above were significantly higher than those with education of junior middle school or lower (P＜0.001).The following time for taking care of the patients were compared with statistics significant:＜1month and 3～6 month,＜1month and ＞6 months,1～3 months and 3～6 months (P＜0.001).Conclusion The caregivers of the patients with neurological disease are short of knowledge in fall-related knowledge,normal behaviors and should carry out individualized health education to them.

Objective To observe the clinical efficacy of mirabilite and rheum officinale combined with pulse high-volume hemofiltration(PHVHF)in treatment of patients with severe acute pancreatitis(SAP). Methods A total of 11 patients with SAP in Department of Critical Care Medicine of Qiannan Traditional Chinese Medicine Hospital of Guizhou Province received the combined treatment of external application of mirabilite,gavage of rheum officinale decoction and PHVHF. The changes in abdominal symptoms,vital signs,blood gas analysis,blood biochemical indicators,and the acute physiology and chronic health evaluation(APACHEⅡ)score,Ranson score and prognosis were observed and compared before and after treatment. Results After treatment,the patients' fever〔body temperature(℃):37.31±0.13 vs. 39.12±0.12〕,tachycardia〔heart rate(beats/min):106±17 vs. 123±22〕, respiratory distress〔respiratory frequency(times/min):23±6 vs. 31±5〕and other symptoms were ameliorated in different degrees,and the APACHE Ⅱ score(9.1±2.2 vs. 21.2±8.2),Ranson score(3.2±1.1 vs. 5.8±1.3)were decreased significantly ,all the above indexes compared before and after treatment being of statistical significant differences(all P<0.05). The indexes of hemodynamics of 10 survival patients were stable,heart rate(beats/min:106±17 vs. 123±22)was decreased,and mean arterial pressure〔MAP,mmHg(1 mmHg=0.133 kPa):73±6 vs. 41±5〕was increased gradually(both P<0.05). After treatment,serum amylase〔AMY(U/L):367.3±102.3 vs. 923.5±351.7〕,alanine aminotransferase〔ALT(U/L):63.3±23.2 vs. 201.5±123.2〕,total bilirubin〔TBil (μmol/L):22.1±20.1 vs. 56.1±63.2〕,serum creatinine〔SCr(μmol/L):132.1±23.5 vs. 392.4±12.2〕,urea nitrogen〔BUN(mmol/L):9.5±4.9 vs. 19.2±5.9〕, K+(mmol/L:4.2±0.2 vs. 5.6±2.1) were significantly decreased,arterial partial pressure of carbon dioxide〔(PaCO2,mmHg):35.1±7.1 vs. 27.2±5.5〕,arterial partial pressure of oxygen〔PaO2(mmHg):93.2±13.2 vs. 49.1±7.2〕and oxygenation index(mmHg:187.1±28.5 vs. 148.2±32.7),Na+(mmol/L:132.1±19.1 vs. 127.1±42.1)were significantly increased compared with those before treatment, there were statistically significant differences(P<0.05 or P<0.01). Conclusion The combined treatment of mirabilite,rheum officinale and PHVHF has significant effects on the treatment of patients with SAP,and it can be one of the assistant therapies of SAP.

Objective To determine the minimal local analgesic dose (MLAD) of hypobaric levobupivacaine in elderly patients undergoing spinal anesthesia during lower limb surgery. Methods A total of 25 patients underwent spinal anesthesia with hypobaric levobupivacaine during lower limb surgery. The initial dose of levobupivaeaine was 7.50 mg for the first patient. The dose for next patient was added by 0.25 mg if the level of sensory block was lower than that of T10, conversely the dose was subtracted by 0.25 mg. The MLAD of hypobaric levobupivacaine was calculated with up-and-down sequential experiment according to Dixon-Messay method. Results The MLAD of hypobaric levobupivacaine were 6.67 mg (95% confidence interval: 6.34-7.25). The anesthesia effects of all patients were good. The degree of motor blockade of the healthy leg was less than another leg.The intraoperative and postoperative complications rates associated with spinal anesthesia were low.Conclusions The MLAD of hypobaric levobupivacaine is 6.67 mg in elderly patients undergoing spinal anesthesia during unilateral lower limb surgery.

Objective To design and synthesize a novel paclitaxel loaded nanoparticle with reactive oxygen species (ROS) response, and characterize its structure, and investigate its stability, in vitro drug responsive release, cellular uptake and in vitro antitumor activity. Methods The PEG-2S-PTX monomer was synthesized by coupling the hydrophilic polyethylene glycol (PEG) with hydrophobic paclitaxel (PTX) via a thioether chain (2S), and the prodrug nanoparticles (PEG-2S-PTX NPs) were prepared by self-assembly. Meanwhile, using succinic anhydride (SA) as the linking group to synthesize the PEG-SA-PTX monomer and prepare the other prodrug nanoparticles (PEG-SA-PTX NPs) as control. The structures of PEG-2S-PTX and PEG-SA-PTX monomer were confirmed by 1H-NMR. The diameter and stability of the nanoparticles were detected by dynamic light scattering (DLS). The PTX release kinetics under oxidizing condition was detected by high performance liquid chromatography (HPLC) method. And the cellular uptake efficiency of nanoparticles by MCF-7 cells was observed by fluorescence microscope. The in vitro antitumor effects of nanoparticles were compared by MTT assay. Results PEG-2S-PTX and PEG-SA-PTX could both be self-assemble into nanoparticles with the diameter of (92.15±12.42) nm and (113.20±12.16) nm. PEG-2S-PTX NPs could rapidly release PTX under oxidative condition while PEG-SA-PTX NPs only showed weak responsiveness. PEG-2S-PTX NPs could be more rapidly taken up by MCF-7 cells compared with PEG-SA-PTX NPs. They both showed concentration dependent anti-tumor effects, but the cytotoxicity of PEG-2S-PTX NPs was stronger than that of PEG-SA-PTX NPs in the concentrations of 0.05, 0.1, 5, 10, 50 and 100 mg/L (P<0.05). Conclusion As paclitaxel prodrug nanoparticles with ROS responsive ability, PEG-2S-PTX NPs can rapidly release PTX in response to ROS in tumor cells, and exhibit great anti-tumor activity in vitro.

Objective To analyze the complications after procedure for prolapse and hemorrhoids (PPH) in treating severe mucocutaneous hemorrhoids.Methods The clinical data of 550 patients with severe mucocutaneous hemorrhoids who were admitted to the Hangzhou Hospital of Nanjing Medical University from January 2005 to December 2013 were retrospectively analyzed.All the patients were treated by PPH or PPH + external hemorrhoids resection.The postoperative complications were recorded and assessed.Patients were followed up via outpatient examination and telephone interview till June 2014.Results Operation was successfully carried out on all the 550 patients.The operation time and duration of hospital stay were (15 ± 10)minutes and (4.2 ± 1.8)days,respectively.A total of 445 patients were followed up for 6-60 months,with the median time of 28 months.The overall incidence of complications was 14.61％ (65/445).Forty-five patients were complicated with anal pain,12 with hemorrhoid recurrence,7 with bleeding,5 with dysporia,4 with anastomotic stenosis and 2 with rectal and perianal infection.Of the 12 patients with hemorrhoids recurrence,5 was alleviated by medication and 7 received PPH for the second time.Of the 4 patients with anastomotic stricture,the condition of 2 patients were alleviated by anus dilatation,and the condition of 1 patient was alleviated by balloon dilatation under enteroscope,1 patient received circular incision of the stricture because of severe stricture and failed of conservative treatment.Of the 2 patients with rectal and perianal infection,1 was alleviated by intravenous and local medication,and the other patient who was complicated with anal fistula was alleviated by surgery.The condition of other patients was improved after symptomatic treatment.Conclusions PPH is effective and safe for the treatment of severe mucocutaneous hemorrhoids.The main complication is anal pain,and it could be cured or alleviated by symptomatic treatment.

Objective: To investigate the characteristics of post traumatic stress disorder (PTSD) in college students during the outbreak of COVID-19, and to explore the mediating role of psychological resilience between social support and PTSD. Methods: By using direct selection method, 572 college students in Anhui and Shanghai were selected and administered with General Characteristics Questionnaire, the PTSD Checklist Civilian Version(PCL-C), Psychological Resilience Scale(PRS) and Social Support Rating Scale(SSRS). Results: Among the participants, 25.0% had moderate PTSD symptoms, 11.7% had obvious PTSD symptoms, and the positive rate of PTSD was 36.7%. The prevalence of PTSD in college students was higher in males than in females ( χ 2= 4.31， P <0.05). The junior students were higher than other students ( χ 2=16.81， P <0.01). The scores of social support, psychological resilience and PTSD were (33.79±4.83), (92.17±13.39) and (35.50±11.39), respectively. The correlations of all variables were statistically significant( r =-0.49-0.76， P <0.05); The mediation test showed that social support could not only negatively predict PTSD directly(direct effect was -0.35), but also indirectly affect PTSD through psychological resilience(indirect effect was -0.32). Conclusion More than one third of college students have PTSD symptoms, and psychological resilience plays a partial mediating role in the relationship between social support and PTSD,social support can both directly and negatively predict PTSD and indirectly affect PTSD by increasing an individual s psychological resilience.

Objective To evaluated the effectiveness and safety ofLianhua Jizhi Tablets for acute trachitis and bronchitis with syndrome of phlegm-heat obstructing.Methods A randomized double-blind, placebo-controlled and multi-center clinical trial design was selected. Totally 240 cases were randomly divided into experimental group and control group, 120 cases in each group, of which 237 cases were included in the analysis of FAS. Experimental group was givenLianhua Jizhi Tablets, while control group was given placebo, 12 tablets/day, 7 days for a course. Curative effect of acute trachitis and bronchitis, TCM syndrome and disappearance of cough, cough and sputum symptom scores and area under the curve (AUC) were observed. The safety was evaluated. Results The cure rates of disease in experimental group and control group were 66.67% (78/117) and 29.17% (35/120), respectively;cure rates of TCM syndrome in experimental group and the control group were 68.38% (80/117) and 27.50% (33/120), respectively;there was statistically significant difference in area under the curve of cough and sputum symptom score between the two groups (P<0.01). Disappearance rates (cure) of daytime cough in experimental group and control group were 52.99% (62/117) and 13.33% (16/120), respectively;disappearance rates (cure) of nocturnal cough in experimental group and control group were 76.52% (88/115) and 31.90% (37/116), respectively;there were no side effects in experimental group.ConclusionLianhua Jizhi Tablets can significantly relieve clinic symptoms in the treatment of acute trachitis and bronchitis, and have good clinical efficacy and safety.

Objective To investigate the clinical features and gene diagnostic bases of childhood L-2 -hydroxyglutaric aciduria (L-2-HGA). Methods The clinical data involving manifestations,laboratory examinations of 4 children with L-2-HGA admitted to Beijing Children′s Hospital Affiliated to Capital Medical University from April 2015 to March 2018 were retrospectively analyzed. Each patient had a follow-up visit ranging from 3 months to 3 years and 2 months after initial examination. Results The 4 patients,of whom 2 were siblings,consisted of 1 male and 3 females,whose age of onset ranged from 8 months old to 3 years old. All of them presented with seizures as their initial symptom. The developmental milestones were all normal before onset,while 3 cases gradually became mentally stagnant. Other symptoms included unsteady gait in 3 cases,slight hand trembling when holding items in 2 cases,and pyramidal impairment in 2 cases. Bilateral symmetric abnormalities in subcortical white matter,basal ganglia and dentate nucleus were detected by cranial magnetic resonance imaging (MRI)in all patients,and cerebral and cerebellar atrophy was ob-served in 1 case. Organic acid analysis by gas chromatography/ mass spectrometry (GC/ MS)demonstrated notable ele-vation of urinary 2-hydroxyglutaric acid in 3 cases. Pathogenic mutations on L2HGDH gene were detected by target -capture high-throughput sequencing in all 4 patients. The compound heterozygous mutations of c. 845G > A (p. Arg282Gln)and c. 800_801delCA (p. Ser267Ter)were identified in case 1,the homozygous missense mutation of c. 584A > G (p. Tyr195Cys ) in case 2 and case 3,and the homozygous frameshift mutation of c. 407delA (p. Lys136SerfsTer3)in case 4. The variants of c. 800_801delCA and c. 407delA were novel mutations firstly reported in this study. Sanger sequencing verified that parents of the 4 cases were all heterozygous carriers. The follow-up study in 2 cases who were put on high dosage of vitamin B2 and L-carnitine had shown a relatively favorable outcome of mild remission in ataxia and absence of mental degradation and further seizures,while the other 2 cases without specific therapy remained relatively stable. Conclusions The main clinical manifestations of L-2-HGA are mental retarda-tion,seizures and ataxia. Bilateral symmetric abnormalities in subcortical white matter,basal ganglia and dentate nucleus are specific neuroimaging findings. Significant elevation of urinary 2-hydroxyglutaric acid is the basic feature of the disease,while gene assessment should be the gold standard in the diagnosis of L-2-HGA. Treatment with high dosage of vitamin B2 and L-carnitine might be effective to partial patients.