This paper reports the results of the study of micronucleus frequency in peripheral lymphocytes in workers exposed to soft wood dust (poplar and linden wood) in match factories. 298 workers exposed to soft wood dust i...This paper reports the results of the study of micronucleus frequency in peripheral lymphocytes in workers exposed to soft wood dust (poplar and linden wood) in match factories. 298 workers exposed to soft wood dust in three match factories were defined as exposure group and 45 waiters in a restaurant as control group. The frequency of micronucleus in peripheral lymphocytes was examined and the control's 95% confidential upper limit≥ 4‰ was defined as the standard to determine the positivity. The positive rate in the exposure group was 36.2% while that in the control group was only 4.4%; the difference is significant (P <0.01). As the coefficient of correlation between length of work and positive rate was 0.86 (P <0.01 ), a dose/time-response is in existence. Meanwhile, the analysis of relation between quantity of smoking and positive rate eliminated the effect of smoking on variation of positive rates. In this paper, we also discussed the relation between positive rates and wood dust concentrations in different worksites and we think that the volatile and unsteady substances in soft wood dust are micronucleus-inducing matters展开更多
目的分析超声引导下经皮脐静脉穿刺术所致胎心率减慢(fetal bradycardia following percutaneous cordocentesis,FBFC)的危险因素,为制定预防措施提供依据。方法回顾性分析2010年5月至2017年6月在中山市博爱医院进行超声引导下经皮脐静...目的分析超声引导下经皮脐静脉穿刺术所致胎心率减慢(fetal bradycardia following percutaneous cordocentesis,FBFC)的危险因素,为制定预防措施提供依据。方法回顾性分析2010年5月至2017年6月在中山市博爱医院进行超声引导下经皮脐静脉穿刺术的2181例孕妇的临床资料,根据是否发生FBFC分为FBFC组和胎心率正常组。对两组病例的母体因素、胎儿因素及手术因素进行单因素和多因素统计分析。结果FBFC组109例,胎心率正常组2072例,FBFC总发生率5.0%。单因素分析显示,与FBFC发生相关的因素包括:胎儿心血管系统异常、进针次数、穿刺时间、超声医师经验。多因素Logistic分析显示:穿刺进针2次、穿刺时间长、胎儿心血管系统异常及超声医师经验少(独立完成操作不足200例)可能是FBFC发生的独立危险因素。结论FBFC是超声引导下脐静脉穿刺术常见并发症,FBFC的发生受母体、胎儿及手术等诸多因素影响。应重视超声异常胎儿的脐静脉穿刺术,特别是心血管系统异常胎儿,提高医师超声定位技能,缩短穿刺时间和减少进针次数可减少FBFC的发生。展开更多
文摘This paper reports the results of the study of micronucleus frequency in peripheral lymphocytes in workers exposed to soft wood dust (poplar and linden wood) in match factories. 298 workers exposed to soft wood dust in three match factories were defined as exposure group and 45 waiters in a restaurant as control group. The frequency of micronucleus in peripheral lymphocytes was examined and the control's 95% confidential upper limit≥ 4‰ was defined as the standard to determine the positivity. The positive rate in the exposure group was 36.2% while that in the control group was only 4.4%; the difference is significant (P <0.01). As the coefficient of correlation between length of work and positive rate was 0.86 (P <0.01 ), a dose/time-response is in existence. Meanwhile, the analysis of relation between quantity of smoking and positive rate eliminated the effect of smoking on variation of positive rates. In this paper, we also discussed the relation between positive rates and wood dust concentrations in different worksites and we think that the volatile and unsteady substances in soft wood dust are micronucleus-inducing matters
文摘目的分析超声引导下经皮脐静脉穿刺术所致胎心率减慢(fetal bradycardia following percutaneous cordocentesis,FBFC)的危险因素,为制定预防措施提供依据。方法回顾性分析2010年5月至2017年6月在中山市博爱医院进行超声引导下经皮脐静脉穿刺术的2181例孕妇的临床资料,根据是否发生FBFC分为FBFC组和胎心率正常组。对两组病例的母体因素、胎儿因素及手术因素进行单因素和多因素统计分析。结果FBFC组109例,胎心率正常组2072例,FBFC总发生率5.0%。单因素分析显示,与FBFC发生相关的因素包括:胎儿心血管系统异常、进针次数、穿刺时间、超声医师经验。多因素Logistic分析显示:穿刺进针2次、穿刺时间长、胎儿心血管系统异常及超声医师经验少(独立完成操作不足200例)可能是FBFC发生的独立危险因素。结论FBFC是超声引导下脐静脉穿刺术常见并发症,FBFC的发生受母体、胎儿及手术等诸多因素影响。应重视超声异常胎儿的脐静脉穿刺术,特别是心血管系统异常胎儿,提高医师超声定位技能,缩短穿刺时间和减少进针次数可减少FBFC的发生。
