Research Progress on Detection Methods of Amphetamines in Human Hair / 法医学杂志

Amphetamines are chemical synthetic drugs that are becoming increasingly popular in China. As a common sample in the inspection of poisons, hair has the advantages of easy storage, good stability, and long detection time compared with traditional human body fluid samples （blood, urine）, thus possesses an unique application value in the field of forensic toxicology analysis. By now, methods for detecting amphetamines in human hair have been widely used, and validity of the results has been recognized and adopted by the court. This paper reviews domestic and foreign research progress of the detection of amphetamines in hair samples, including the pretreatment and analytic methods.

Study on hemostatic effect of different methods of oxytocin in laparoscopic myomectomy / 中国综合临床

Objective To examine the hemostatic effect of oxytocin in laparoscopic myomectomy,and to clarify the optimal dosage of oxytocin in laparoscopic myomectomy. Methods From January 2016 to July 2017, ninety patients with myoma of uterus who underwent laparoscopic myomectomy in Tangshan Union Medical College Hospital were divided into two groups: group A and group B,45 cases in each group. In group A,the patients were given 20U oxytocin and 5％ glucose injection 250 ml via intravenous drip, and in group B, the patients were injected with 20U oxytocin on the muscular wall of uterus myoma during operation. The preoperative, postoperative basic situation, intraoperative blood loss, operation time, intraoperative and postoperative adverse reactions and the time of hospitalization were compared between the two groups. Results The average amount of blood loss during operation in group B was (76. 5±15. 8) ml,significantly lower than that in group A((99. 8±20. 7) ml),and the operation time in group B was (71. 2±10. 7) min,shorter than that in group A ((90. 1±18. 4) min) The difference was statistically significant (t=1. 788、2. 878,P<0. 05). At 5 minutes,30 minutes and 180 minutes after medication, the systolic blood pressure of patients in group A was (132. 2±1. 4) mmHg,(120. 7±5. 3) mmHg,(110. 9±1. 8) mmHg and the diastolic blood pressure was (80. 9 ±12. 5) mmHg,(71. 4±12. 6)mmHg,(70. 1±2. 8) mmHg,while the systolic blood pressure in the group B was (140. 4±11. 1) mmHg,(131. 2±4. 5) mmHg,(121. 4±11. 2) mmHg and the diastolic blood pressure was (93. 4±8. 1) mmHg,(86. 4±7. 1) mmHg,(81. 1±1. 5) mmHg,the differences were statistically significant (systolic blood pressure:Ftime=68. 57,P<0. 001;FgrouP=16. 54,P<0. 001;Finteraction=4. 34,P=0. 011;diastolic blood pressure:Ftime=45. 16,P<0. 001;FgrouP=10. 79,P=0. 024;F interaction=4. 16,P=0. 037);at the same treatment time,the systolic blood pressure and diastolic blood pressure in group B were higher than those in group A,the differences were statistically significant (P<0.05).Conclusion Laparoscopic uterine myomectomy with oxytocin hemostasis, intrauterine myoma wall injection method can significantly reduce intraoperative blood loss and shorten the operation time,the effect is obviously better than intravenous drip,and it is conducive to the operation.

Study on hemostatic effect of different administration methods of hemabate in laparoscopic myomectomy / 中国综合临床

Objective To investigate the hemostatic effect of different administration Methods of hemabate in laparoscopic myomectomy, and to clarify the best mode of hemabate in laparoscopic myomectomy.Methods Ninety patients were randomly divided into two groups,group A and group B,45 patients in each group,group A was given intramuscular injection of hemabate 0.25 mg 30 minutes before operation,and in group B,the patients were injected with hemabate 0.25 mg at the muscular wall of uterine leiomyoma during operation.The preoperative,postoperative basic situation,intraoperative blood loss,operation time,intraoperative and postoperative adverse reactions and length of hospital stay were compared between the two groups.Results The average amount of blood loss during operation in the group B was(67.6±17.6)ml, significantly less than that in the group A((88.7±21.6)ml),the operation time in the group B was(68.1 ±18.1)min,shorter than that in the group A(83.1 ± 17.5)min(t=1.877,2.787,P<0.05).The systolic blood pressure of patients in the group A after 15,30,45 and 180 minutes of medication were(155.6±10.31) mmHg,(141.2±5.7)mmHg,(138.6±10.3)mmHg,(127.5±7.4)mmHg,respectively and the diastolic blood pressure were(90.5±8.8)mmHg,(85.5±8.0)mmHg,(80.6±6.3)mmHg,(72.2±7.1)mmHg,while the systolic blood pressure were(141.1±8.3)mmHg,(120.5±6.1)mmHg,(125.7±4.6)mmHg,(118.8±5.5) mmHg and diastolic blood pressure were(81.2 ± 11.4)mmHg,(70.4 ± 10.1)mmHg,(71.5 ± 5.8)mmHg, (66.5±1.2)mmHg in the group B,the differences were statistically significant(systolic blood pressure,Ftime=79.75,P<0.001;FgrouP=25.45,P<0.001; Finteraction=5.48,P=0.041; diastolic blood pressure,Ftime=46.61,P<0.001;FgrouP=11.97,P=0.021,Finteraction=4.05,P=0.034).Conclusion The application of hemabate for hemostasis in laparoscopic myomectomy surgery and uterine fibroids at the muscle wall injection medication can significantly reduce the amount of blood loss during operation,shorten the operation time,and at the same time,the effect on blood pressure was lower than that by preoperative hemabate,is beneficial to the development of operation,with obvious advantages.

Study on hemostatic effect of different administration methods of hemabate in laparoscopic myomectomy / 中国综合临床

Objective To investigate the hemostatic effect of different administration Methods of hemabate in laparoscopic myomectomy, and to clarify the best mode of hemabate in laparoscopic myomectomy.Methods Ninety patients were randomly divided into two groups,group A and group B,45 patients in each group,group A was given intramuscular injection of hemabate 0.25 mg 30 minutes before operation,and in group B,the patients were injected with hemabate 0.25 mg at the muscular wall of uterine leiomyoma during operation.The preoperative,postoperative basic situation,intraoperative blood loss,operation time,intraoperative and postoperative adverse reactions and length of hospital stay were compared between the two groups.Results The average amount of blood loss during operation in the group B was(67.6±17.6)ml, significantly less than that in the group A((88.7±21.6)ml),the operation time in the group B was(68.1 ±18.1)min,shorter than that in the group A(83.1 ± 17.5)min(t=1.877,2.787,P<0.05).The systolic blood pressure of patients in the group A after 15,30,45 and 180 minutes of medication were(155.6±10.31) mmHg,(141.2±5.7)mmHg,(138.6±10.3)mmHg,(127.5±7.4)mmHg,respectively and the diastolic blood pressure were(90.5±8.8)mmHg,(85.5±8.0)mmHg,(80.6±6.3)mmHg,(72.2±7.1)mmHg,while the systolic blood pressure were(141.1±8.3)mmHg,(120.5±6.1)mmHg,(125.7±4.6)mmHg,(118.8±5.5) mmHg and diastolic blood pressure were(81.2 ± 11.4)mmHg,(70.4 ± 10.1)mmHg,(71.5 ± 5.8)mmHg, (66.5±1.2)mmHg in the group B,the differences were statistically significant(systolic blood pressure,Ftime=79.75,P<0.001;FgrouP=25.45,P<0.001; Finteraction=5.48,P=0.041; diastolic blood pressure,Ftime=46.61,P<0.001;FgrouP=11.97,P=0.021,Finteraction=4.05,P=0.034).Conclusion The application of hemabate for hemostasis in laparoscopic myomectomy surgery and uterine fibroids at the muscle wall injection medication can significantly reduce the amount of blood loss during operation,shorten the operation time,and at the same time,the effect on blood pressure was lower than that by preoperative hemabate,is beneficial to the development of operation,with obvious advantages.

Analysis of Differentially Expressed Proteins Distribution in the Rat Brains with DAI by MALDI-TOF-IMS / 法医学杂志

OBJECTIVES@#To establish the imaging mass spectrometry for analysis of differentially expressed proteins distribution in the rat brains with diffuse axonal injury （DAI） based on matrix assisted laser desorption/ionization-time of flight imaging mass spectrometry （MALDI-TOF-IMS）.@*METHODS@#MALDI-TOF-IMS scanning were conducted on the brains of DAI group and control group in the m/z range of 1 000 to 20 000 using AutoflexⅢ MALDI-TOF spectrometer. ClinProTool 2.2 software was used for statistical analysis on the data of two groups, and then the differentially expressed proteins were picked out to conduct imaging. The distribution of the proteins with different m/z in the rat brains was observed.@*RESULTS@#Five proteins with different m/z, including 4 963, 5 634, 6 253, 6 714 and 7 532, differentially expressed in the rat brains with DAI.@*CONCLUSIONS@#MALDI-TOF-IMS can be used for studying the differentially expressed proteins in rat brains with DAI and the analysis method is established for exploring the distribution of differentially expressed proteins in the rat brains with DAI using imaging mass spectrometry.

New Progress of MALDI-TOF-IMS in the Study of Proteomics / 法医学杂志

Matrix-assisted laser desorption/ionization time-of-flight imaging mass spectrometry (MALDI-TOF-IMS) has been a classical technique for studying proteomics in present and a tool for analyzing the distribution of proteins and small molecules within biological tissue sections. MALDI-TOF-IMS can analyze multiple unknown compounds in biological tissue sections simultaneously through a single measurement which can obtain molecule imaging of the tissue while maintaining the integrity of cellular and molecules in tissue. In recent years, imaging mass spectrometry technique develops relatively quickly in all biomedical domain. This paper based on the relevant data and reviews the present developing level of MALDI-TOF-IMS, the principle of imaging mass spectrometry, methology and the prospect in forensic pathology.

Proteomic Analysis of Rat Brain Stem with DAI by MALDI-TOF-MS / 法医学杂志

OBJECTIVE@#To establish a diagnostic model for diffuse axonal injury (DAI) by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS). To screen the proteins or peptides associated with DAI for providing the biomarkers with theoretic foundation.@*METHODS@#Fifteen male Sprague-Dawley rats were randomly divided into DAI group (n = 10) and control group (n = 5). The protein or peptide expression profiles of rat brain stem were detected by MALDI-TOF-MS. ClinProTools 2.2 software was used to find specific peaks, and a diagnostic model was established by the genetic algorithm.@*RESULTS@#There were significant differences in 61 peaks of DAI group (P < 0.05), 9 peaks were down-regulated and 52 up-regulated. The diagnostic model was established based on 5 different peaks. The specificity and sensitivity of cross validation was 96.14% and 95.98%; while the specificity and sensitivity of blind validation showed was 73.33% and 70.00%, respectively.@*CONCLUSION@#A specific and sensitive diagnostic model of DAI can be established by MALDI-TOF-MS to provide a potential value for determining DAI in forensic practice.

[Preliminary study on the functional localization of auditory cortex in the healthy young subjects using magnetic source imaging].

OBJECTIVE: To evaluate the value of magnetic source imaging (MSI) in the functional localization of the primary auditory cortex. METHODS: The M100 waves of cortical auditory evoked magnetic fields (AEFs) evoked by 0.5, 1, 2, 4 and 8 kHz pure tones in 5 subjects and by 2 kHz pure tones in 25 healthy young subjects were measured respectively (16 males and 14 females, with the age from 20 to 32 years old) using a whole head 306 channel magnetoencephalography (MEG) system. The MSI obtained by superimposing functional MEG data on structural magnetic resonance image (MRI) was used to localize the M100 sources on the auditory cortex. RESULTS: The M100 waves of AEFs were clear and replicable in both hemispheres. The M100 sources were localized on the bilateral transverse temporal gyri in all 30 subjects. The localization of M100 on transverse temporal gyri varied with the changes of stimulus frequency. The localization of primary auditory cortex was asymmetrical between bilateral hemispheres, and the left hemisphere M100 dipoles were significantly posterior compared to the right M100 dipoles. The M100 responses appeared significantly earlier to the contralateral stimuli than that to the ipsilateral stimuli in both hemispheres. The dipole positions of M100 were independent of the side of the stimuli. CONCLUSIONS: The functional localization of the primary auditory cortex could be determined precisely by magnetic source imaging (MSI) with high spatiotemporal resolution. MSI would hold great promise as a noninvasive tool for the fundamental and clinical research in otology.