Characterization of Mitochondrial DNA Sequence Heteroplasmy in Blood Tissue and Hair as a Function of Hair Morphology*,†,‡

Abstract: This study characterizes mitochondrial DNA (mtDNA) sequence heteroplasmy in blood tissue and hair as a function of hair morphology. Bloodstains (127 individuals) and head hairs (128 individuals) were typed using the mtDNA LINEAR ARRAY? assay. A total of 1589 hairs were interpreted: 1478 (93%) were homoplasmic and 111 (7%) exhibited heteroplasmy at one or more positions. Seventy‐one percent (82/116) of individuals were homoplasmic, whereas 29% (34/116) exhibited heteroplasmy in at least one hair. The results demonstrate intra‐ and inter‐tissue differences in heteroplasmy within individuals. Sequence heteroplasmy among hairs from each individual varied from 0 to 90%; the frequency does not differ significantly with population group, cosmetic treatment, age, gender, medulla morphology, region of the scalp, hair growth phase, or, when comparing living and deceased donors. However, the results support a correlation between heteroplasmy and hair pigmentation; typically, lighter‐pigmented hairs exhibit a higher incidence of sequence heteroplasmy compared to darker hairs.     

GC-MC法测定血液中丙泊酚

目的 建立血液中丙泊酚的气相色谱-质谱联用(GC-MS)分析方法.方法 血液以2,4-二甲基-6-叔丁基苯酚为内标,用乙醚进行液液萃取,离心后取有机层,水浴下挥干,GC-MS检测.结果 血液中丙泊酚与内标分离良好,在0.02～10 μg/mL范围内线性良好,线性方程为y=0.3136 x-0.0068,相关系数为0.9...     

医疗产品损害责任三论

医疗产品损害责任是《侵权责任法》第59条规定的医疗损害责任类型,关于责任分担的规则规定得不够完善,应当根据产品责任的一般规则以及侵权责任法的连带责任规则进行补充.血液属于准产品,应当适用医疗产品损害责任规则确定医疗机构的赔偿责任.消毒药剂构成医疗产品损害责任,其缺陷的判定有一定特点.     

HPLC-MS/MS方法检验血液中可待因

目的 采用HPLC-MS/MS方法对血液中可待因进行定性、定量检验.方法 以Clean Screen DAU混合阳离子交换固相萃取柱提取血样,应用HPLC色谱法分离,MS/MS检测分析.结果 该方法回收率高于70％,线性范围0.01～2 μg/mL,检测限0.1ng(S/N≥3).结论 本文方法快速、灵敏、准确,可用于血液中可待因的定性、定量分析检验.     

养血化瘀止血合抗凝抗纤溶治疗恶性肿瘤并发弥散性血管内凝血49例

目的 观察养血化瘀止血合抗凝抗纤溶治疗肿瘤并发弥散性血管内凝血（disseminated intravascular coagulation, DIC）的临床疗效。方法 将确诊的肿瘤DIC患者89例随机分为治疗组49例、对照组40例。对照组在积极治疗原发病的基础上给予抗凝抗纤溶治疗,观察组在对照治疗基础上给予活血化瘀止血中药治疗。观察两组临床症状改善时间和两组临床疗效,检测并比较两组治疗前后血小板(platelet count, PLT)计数、纤维蛋白原(fibrinogen, Fbg)、活化部分凝血活酶时间(activated partial thromboplastin time, APTT)、凝血酶原时间(prothrombin time, PT)、纤维蛋白(原)降解产物(fibrin degradation products, FDP)、D-二聚体。结果 观察组临床症状改善时间显著低于对照组(P<0.05);观察组PLT、Fbg、APTT、PT、FDP较对照组明显改善(P<0.05);观察组和对照组总有效率分别为69.4%、42.5%,其差异有统计学意义(P<0.05)。结论 养血化瘀止血合抗凝抗纤溶治疗能够明显改善恶性肿瘤DIC患者的凝血纤溶指标和提高临床疗效。     

非法组织卖血罪的认定和处罚问题研究

《刑法》第333条规定的非法组织卖血罪，在认定和处罚方面还存在较大的争议。在认定方面，《刑法》第13条但书的规定是非法组织卖血罪与一般非法组织卖血行为的界限标准，是否使用暴力、威胁方法是非法组织卖血罪与强迫卖血罪的区分关键，被组织卖血者的全部环节的完成为非法组织卖血罪的既遂根据；在刑罚方面，《刑法》第333条第2款中“前款行为”不只是针对强迫卖血罪而言，还包括非法组织卖血罪，“他人”指的是卖血者而不包括用血者，“伤害”应当限制解释为“重伤”。     

A large-scale study of the relationship between blood and breath alcohol concentrations in New Zealand drinking drivers

Blood alcohol concentrations (BAC) and corresponding breath alcohol concentrations (BrAC) were determined for 21,582 drivers apprehended by New Zealand police. BAC was measured using headspace gas chromatography, and BrAC was determined with Intoxilyzer 5000 or Seres Ethylometre infrared analysers. The delay (DEL) between breath testing and blood sampling ranged from 0.03 to 5.4 h. BAC/BrAC ratios were calculated before and after BAC values were corrected for DEL using 19 mg/dL/h as an estimate of the blood alcohol clearance rate. Calculations were performed for single and duplicate breath samples obtained using the Intoxilyzer (groups I-1 and I-2) and Seres devices (groups S-1 and S-2). Before correction for DEL, BAC/BrAC ratios for groups I-1, I-2, S-1, and S-2 were (mean+/-SD) 2320+/-260, 2180+/-242, 2330+/-276, and 2250+/-259, respectively. After BAC values were adjusted for DEL, BAC/BrAC ratios for these groups were (mean+/-SD) 2510+/-256, 2370+/-240, 2520+/-280, and 2440+/-260, respectively. Our results indicate that in New Zealand the mean BAC/BrAC ratio is 19-26% higher than the ratio of the respective legal limits (2000).     

血液中丙泊酚的GC-MS分析

目的应用气质联用仪(GC-MS),建立快速、灵敏地分析血液中丙泊酚的定性定量方法。方法血液1mL,加入内标,采用液液提取方法处理,GC-MS选择离子(SIM)模式测定。结果在0.1～10μg/mL范围呈良好的线性关系,相关系数R2为0.9931,最低检测限(LOD)为0.05μg/mL。结论所建立的方法简便、快速、特异性强、灵敏度高,可满足法庭毒物分析和临床毒物分析的需要。     

固相萃取毛细管区带电泳法测定全血中甲基苯丙胺

目的建立全血中甲基苯丙胺的固相萃取毛细管区带电泳法检验方法。方法血液采用OasisHLB固相萃取小柱直接萃取,BeckmanP/ACEMDQ毛细管电泳仪区带法分析。结果回归方程y=0.0083x-0.0164,线性范围5～75μg/mL(r=0.994),日内精密度RSD=2.22%,日间精密度RSD=5.31%,盐酸甲基苯丙胺质量浓度为25.0μg/mL的全血相对回收率(91.63±2.5)%。电泳分离良好,空白无干扰。结论本方法操作简便,适用于全血中甲基苯丙胺的检验。     

阴茎动脉Doppler超声分析

目的研究健康成年男性阴茎背动脉(DA)、海绵体动脉(CA)PI、RI及S/D的正常值。方法将257名健康成年男性按年龄分为5组,分别为<30岁组65名,30～39岁组83名,40～49岁组61名,50～59岁组38名,60岁以上组10名。用Logidop!2型数字式Doppler超声血流仪检查双侧阴茎背动脉、双侧海绵体动脉PI、RI及S/D值。结果阴茎疲软状态下,阴茎背动脉、海绵体动脉PI、RI和S/D值个体左右比较无差异,各年龄组也无差异。建议正常参考值分别为:(1)LDA:PI1.43～3.43,RI0.72～0.92,S/D2.68～10.56。(2)RDA:PI1.47～3.47,RI0.73～0.93,S/D3.27～10.09。(3)LCA:PI1.49～3.21,RI0.74～0.90,S/D3.17～9.55。(4)RCA:PI1.93～3.27,RI0.72～0.90,S/D3.22～9.42。结论作为一种筛选手段,Doppler超声血流检测手段,有一定的应用价值。