心肌肌钙蛋白I对新生儿窒息心肌损害的早期诊断价值

目的评价心肌肌钙蛋白I（cTn I）对新生儿窒息心肌损害（MCI）的早期诊断价值。方法采用双抗夹心免疫测定方法检测51例生后窒息并MCI新生儿（MCI组）血清cTnI和CK．MB水平，并以57例窒息无MCI（NMCI组）及45例正常新生儿（NC组）作为对照组。结果NC组cTnI水平在生后7d内无变化，MCI组生后24h内和1周时cTnI水平均显著高于NMCI组和NC组（P〈0．01）。MCI组生后24h内CK—MB水平显著高于NMCI组和NC组（P〈0．01）；生后5—7d3组CK—MB水平差异无显著性（P〉0．05），且均明显低于生后24h内水平。cTnI诊断新生儿MCI的敏感度为91％，特异度为88％，准确度89％；CK—MB的敏感度为86．3％，特异度为69％，准确度为74％。结论血清cTnI及CK-MB均可用于新生儿窒息MCI的早期诊断，cTnI优于CK-MB。     

窒息新生儿血清肌钙蛋白I和磷酸肌酸激酶

目的探讨血清肌钙蛋白I（cTnI）和磷酸肌酸激酶同工酶（CK—MB）对窒息新生儿心肌损伤的早期诊断价值。方法选择轻度窒息新生儿29例（轻度组）、重度窒息新生儿18例（重度组）。采用ELISA法和酶动力法检测新生儿血清cTnI水平和CK—MB活性。结果出生d1窒息新生儿血清cTnI和CK-MB水平在轻度组[（2．25±0．54）μg／L、（223．4±23．5）U／L]和重度组[（4．25±0，83）μg／L、（256．3±21．8）U／L]均显著高于对照组（Pα〈0．01）；重度组血清cTnI和CK-MB水平均显著高于轻度组（Pα〈0．01）。治疗后d7窒息新生儿血清cTnI和CK—MB水平均明显下降，轻度组[（0．69±0．18）μg／L、（151．4±18．4）U／L]与对照组均无显著差异（Pα〉0．05），重度组[（1．54±0．72）μg／L、（188．9±21．5）U／L]显著高于轻度组和对照组（Pα〈0．01）。结论窒息新生儿伴心肌损伤时血清cTnI和CK—MB水平升高；动态观察可用于窒息新生儿微小心肌损伤的早期诊断。     

新生儿窒息后心肌肌钙蛋白Ⅰ与心肌酶活性的时相变化及其意义

目的：探讨新生儿窒息后心肌肌钙蛋白Ⅰ(CTnⅠ)及心肌酶活性的时相变化。方法：化学发光法和全自动生化分析仪测定新生儿窒息组26例(轻度窒息16例，重度窒息10例)和对照组10例生后0 h，6 h，12 h，24 h，72 h，10 d血清CTnI水平、肌酸激酶(CK)、肌酸激酶心型同工酶(CK-MB)、乳酸脱氢酶(LDH)及天门冬酸氨基转移酶(AST)活性。结果：窒息组0 h血清CTnI水平，CK，CK-MB和LDH活性明显高于对照组，均P<0.01；其中CTnI峰值在12 h，48 h开始下降；CK活性峰值为6 h，而CK-MB活性于12～24 h达高峰，均于72 h后下降；LDH活性于12 h达高峰，AST活性则于6 h开始升高，24 h后降低。结论：窒息新生儿生后早期动态监测血清CTnI与心肌酶活性有助于及时诊断和治疗心肌损害。     

窒息新生儿血清肌钙蛋白I和磷酸肌酸激酶同工酶变化的意义

目的探讨血清肌钙蛋白I(cTnI)和磷酸肌酸激酶同工酶(CK-MB)对窒息新生儿心肌损伤的早期诊断价值。方法选择轻度窒息新生儿29例(轻度组)、重度窒息新生儿18例(重度组)。采用ELISA法和酶动力法检测新生儿血清cTnI水平和CK-MB活性。结果出生d1窒息新生儿血清cTnI和CK-MB水平在轻度组[(2.25±0.54)μg/L、(223.4±23.5)U/L]和重度组[(4.25±0.83)μg/L、(256.3±21.8)U/L]均显著高于对照组(Pa<0.01);重度组血清cTnI和CK-MB水平均显著高于轻度组(Pa<0.01)。治疗后d7窒息新生儿血清cTnI和CK-MB水平均明显下降,轻度组[(0.69±0.18)μg/L、(151.4±18.4)U/L]与对照组均无显著差异(Pa>0.05),重度组[(1.54±0.72)μg/L、(188.9±21.5)U/L]显著高于轻度组和对照组(Pa<0.01)。结论窒息新生儿伴心肌损伤时血清cTnI和CK-MB水平升高;动态观察可用于窒息新生儿微小心肌损伤的早期诊断。     

血浆cTnI,CK—MBmass及CK—MBmass／CK比值在围产期窒息后的变化及其比较研究

评价血浆心肌肌钙蛋白I（cTnI)，肌酸激酶心型同工酶质量（CK－MB－mass)肌酸激酶心型同工酶质量／肌酸激酶活性的比值（CK－MBmass/CK)对围产期窒息后心肌损伤诊断价值，对71例围产期窒息新生儿及27例对照组新生儿生后6－48小时血浆cTnI,CK-MBmass及CK水平进行测定并计算CK－MBmass/CK比值，运用Wilcoxon秩和检验等方法进行分析，结果显示：（1）新生儿窒息伴胎儿窘迫组（23例）cTnI,CK-MBmass,CK均显著高于对照组（27例），新生儿窒息伴胎儿窘迫组CK－MB－mass,CK显著高于单纯窘迫组（38例）；单纯窒息组（10例）与对照组相比，仅CK－MBmass/CK明显降低，其它指标差异无显著性。（2）围产期窒息重度心脏损害患儿（8例）cTnI,CK-MBmass,CK均明显高于该组无重度心脏损害患儿（63例），（3）重度窒息组（17）例仅CK－MBmass,CK明显高于轻度窒息组（16例），因此，新生儿严重缺氧时，血浆cTnI-MBmass，CK均明显增高，表明存在心肌伤，CTnI虽对心肌损伤有高度特性性，但敏感性低于CK－MBmass,CK，且受胎龄影响，在判断早产儿心肌损伤时有一定的局限性，CK－MBmass/CK比值不宜作为围产期窒息后心肌损伤的生化指标。     

血浆cTnI、CK-MBmass及CK-MBmass/CK比值在围产期窒息后的变化及其比较研究

评价血浆心肌肌钙蛋白Ⅰ(cTnI)、肌酸激酶心型同工酶质量(CK-MB-mass)、肌酸激酶心型同工酶质量/肌酸激酶活性的比值(CK-MBmass/CK)对围产期窒息后心肌损伤诊断价值,对71例围产期窒息新生儿及27例对照组新生儿生后6～48小时血浆cTnI、CK-MBmass及CK水平进行测定并计算CK-MBmass/CK比值,运用Wilcoxon秩和检验等方法进行分析.结果显示(1)新生儿窒息伴胎儿窘迫组(23例)cTnI、CK-MBmass、CK均显著高于对照组(27例);新生儿窒息伴胎儿窘迫组CK-MB-mass、CK显著高于单纯窘迫组(38例);单纯窒息组(10例)与对照组相比,仅CK-MB-mass/CK明显降低,其它指标差异无显著性.(2)围产期窒息组重度心脏损害患儿(8例)cTnI、CK-MBmass、CK均明显高于该组无重度心脏损害患儿(63例).(3)重度窒息组(17)例仅CK-MBmass、CK明显高于轻度窒息组(16例).因此,新生儿严重缺氧时,血浆cTnI、CK-MBmass、CK均明显增高,表明存在心肌损伤.cTnI虽对心肌损伤有高度特异性,但敏感性低于CK-MBmass、CK,且受胎龄影响;在判断早产儿心肌损伤时有一定的局限性.CK-MBmass/CK比值不宜作为围产期窒息后心肌损伤的生化指标.     

窒息新生儿心肌损害的早期诊断

目的探讨血清肌酸磷酸激酶同工酶(CK-MB)及心肌肌钙蛋白Ⅰ(cTnⅠ)对新生儿(MCI组)窒息心肌损害(MCI)的早期诊断价值。方法采用直接化学发光免疫夹心法和免疫抑制酶动力学法动态检测34例生后10 d内窒息并MCI新生儿(MCI组)血清cTnⅠ和CK-MB水平,并以38例窒息无心肌损害(NMCI组)及30例正常新生儿(NC组)作为对照组。结果NC组cTnⅠ水平在生后10 d内无变化,MCI组生后24 h内和1周时cTnⅠ水平均显著高于NMCI组和NC组(P均<0.01)。MCI组生后24 h内CK-MB水平显著高于NMCI组和NC组(P均<0.01);3组生后5~7 d检测值比较均无统计学差异(P均>0.05),且均明显低于生后24 h内水平。cTnⅠ诊断新生儿MCI的敏感度为91%,特异度为88%,准确度89%;CK-MB诊断新生儿MCI敏感度为85%,特异度为68%,准确度为74%。结论血清CK-MB及cTnⅠ均可用于新生儿窒息心肌损害的早期诊断,cTnⅠ优于CK-MB。     

窒息新生儿心肌损害的动物实验和临床多指标研究

目的 通过临床检测及动物实验探讨心肌酶谱、肌钙蛋白、心功能等多指标对新生儿窒息引起的心肌损害的临床综合诊断价值、敏感性及内在联系。方法将2001年6月一2002年10月住院的30例窒息新生儿分为轻度窒息组、重度窒息组、重度窒息恢复期组,选正常分娩的足月新生儿共30例为正常对照组,分别测心肌酶谱及同工酶、心肌肌钙蛋白T(CTnT),做心电图及测心率,通过心脏超声心动图观察心脏结构和测量心功能。动物实验观察出生3 d的大鼠在不同时间缺氧后心肌细胞的搏动次数、心肌酶变化及心肌细胞微细结构的变化。结果重度窒息组心率显著减慢,心肌酶谱指标均明显升高,CTnT阳性率高。心功能指标均明显下降,A/E倒置;轻度窒息组LDH、CK、CK-MB及HBDH轻度升高,心功能中仅FS和SV轻度下降;重度窒息恢复期组各项指标均恢复正常;各组窒息新生儿心脏结构无明显改变。大鼠缺氧时间越长心肌酶指标升高越明显,心肌细胞搏动越慢,心肌细胞微细结构发生改变。结论 心脏超声心动图对窒息新生儿心肌损害的判断具有重要价值,FS和SV可以作为早期心肌损害的指标;心肌酶谱及同工酶可早期诊断窒息所致的心肌损害、判断严重程度及评估恢复情况;肌钙蛋白对反映心肌损害的敏感性并不高于心肌酶学指标;综合分析CK—MB>40.76或CTnT阳性,EF、FS     

尿视黄醇结合蛋白、血肌红蛋白、心肌肌钙蛋白Ⅰ检测在窒息新生儿心肌和肾脏损害中的应用

目的探讨血肌红蛋白(Mb)、心肌肌钙蛋白Ⅰ(cTnI)和尿视黄醇结合蛋白(RBP)检测在窒息新生儿心肌和肾脏损害诊断中的价值。方法以35例正常足月新生儿为对照组。50例窒息新生儿作为研究对象,于新生儿出生1、6、12 h分别抽静脉血2 mL分离血清,采用化学发光免疫法进行Mb、cTnI检测;于新生儿出生后d1、4、7分别留取新鲜随机尿液,采用酶联免疫吸附法(ELISA)进行RBP/Cr检测。结果与对照组比较,窒息组Mb、cTnI和RBP/Cr值均显著升高(P均<0.01),且随窒息程度加重而升高。结论窒息对新生儿心肌功能和肾脏产生损伤。Mb、cTnI和RBP/Cr三项指标能较好反映心肌和肾脏损害。     

新生儿窒息对血清CPK-MB 活性测定及其临床意义

本研究测定新生儿血清磷政肌酸激酶心型同功酶(CPK—MB)活性并观察其动态变化,以评价新生儿窒息时的心肌损害。观察对象包括围产期窒息新生儿85例(重度窒息40例,轻度窒息45例),无窒息健康新生儿10例。结果窒息新生儿血清 CPK—MB 活性明显升高,且重度窒息组显著高于轻度窒息组。8例重度窒息新生儿发生急性充血性心衰,其血清 CPK—MB 活性显著高于重度窒息组总体均数。提示围产期窒息后常有心肌损害发生,其程度与窒息严重度密切相关。     

轻度窒息新生儿动态心电图及心肌酶变化的临床研究

目的 探讨轻度窒息新生儿动态心电图（AECG）、心肌酶变化特点及其临床意义.方法 选取2011年6月至2013年8月我院新生儿科收治的轻度窒息新生儿为窒息组,同期选择本院分娩的30例健康新生儿为对照组,均于生后24h内行AECG检查,于出生18 ～24 h内抽取静脉血测定血清肌酸磷酸激酶（CK）、血清肌酸磷酸激酶同工酶（CK-MB）、血清乳酸脱氢酶（LDH）、血清谷草转氨酶（AST）、心肌肌钙蛋白（cTnI）.结果 窒息组（46例）与对照组（30例）新生儿AECG窦性心律指标（最慢心率、最快心率、平均心率）差异均无统计学意义（P＞0.05）;窒息组ST段改变及心律失常等其他几项综合指标（包括房早、房速、室早、Q-T间期延长、交界性逸搏）异常发生率高于对照组（65.2％比16.7％,89.1％比13.3％,P均＜0.01）.窒息组心肌酶指标及cTnI值均高于对照组[CK（604.7±275.4）比（162.0±95.1）,CK-MB（87.9±61.0）比（28.3±27.1）,LDH（686.0±383.5）比（310.7±133.5）,AST （95.0±63.1）比（35.2±13.9）,cTnI（0.12±0.11）比（0.02±0.01）,P均＜0.01].窒息组CK、CK-MB、LDH、AST异常发生率高于对照组（63.0％比16.7％,82.6％比6.7％,95.7％比20.0％,32.6％比6.7％,P均＜0.01）.结论 轻度窒息新生儿AECG监测可发现各种心律失常、ST段改变,其心肌酶亦明显高于正常新生儿,ST段改变及CK-MB的升高是诊断轻度窒息新生儿心肌损伤的可靠依据.     

围产期窒息后血浆cTnI、CK-MBmass的影响因素及临床应用价值

为探讨围产期窒息后血浆心肌肌钙蛋白I（cTnI）、肌酸激酶心型同工酶质量（CK-MBmass）的影响因素及临床应用价值。对71例围产期窒息新生儿及27例对照组新生儿生后6小时－48时血浆cTnI、CK-MBmass水平进行测定，运用逐步回归等方法进行分析。结果显示：（1）血浆cTnI水平的变化与胎龄、5分钟Apgar评分有关。（2）围产期窒息组足月儿（59例）cTnI明显高于对照组足月儿（19）；重度窒息组（17例）与轻度窒息组（16例）比较，cTnI差异无显著性，而CK-MBmass差异有非常显著性；围产期窒息组的重度心脏损害患儿（8例）cTnI、CK-MBmass水平明显高于无重心脏损害患儿（63例）。表明围产期窒息持续时间越长cTnI的水平越高。相对于CK-MBmass而言，cTnI对心肌损伤的敏感性可能稍差，而且由于cTnI的水平随着胎龄的增加而增加，因此这一指标在判断早产儿心肌损伤时有一定的局限性。     

Cardiac troponin I in asphyxiated neonates

BACKGROUND: Cardiac troponins T (cTnT) and I (cTnI) are well-established markers in detecting myocardial ischemic damage in adults. Perinatal asphyxia is associated with cardiac dysfunction. OBJECTIVES: To evaluate serum concentrations of cTnI in asphyxiated neonates and to investigate whether cTnI is correlated with the traditional markers of asphyxia. METHODS: Blood samples were collected from 13 asphyxiated neonates (umbilical artery pH<7.18 and either a 1-min Apgar score<4 or a 5-min Apgar score<7) and 39 controls. Data on gestation, birth weight, sex, Apgar scores, mode of delivery, umbilical pH, creatinine, serum activity of aspartate and alanine aminotransferase, and QTc interval were investigated. RESULTS: Median (range) cTnI concentrations were significantly higher in asphyxiated neonates with respect to healthy infants: 0.36 microg/l (0.05-11) versus 0.04 microg/l (0.04-0.06); p<0.01. In asphyxiated babies, no statistically significant correlations were found between concentrations of cTnI and the other markers of asphyxia. CONCLUSIONS: In asphyxiated neonates, cTnI concentrations are higher with respect to healthy infants, suggesting the presence of myocardial damage in this group of high-risk patients. cTnI does not correlate with the traditional markers of asphyxia.     

重症监护室脓毒症患儿心肌损伤的临床研究

目的 探讨重症监护室脓毒症患儿心肌损伤的发生率,心肌肌钙蛋白I(cTnI)及CK-MB水平升高与心肌损伤、多器官功能障碍综合征(MODS)、病死率及与急性生理和慢性健康状况Ⅱ(APACHE Ⅱ)评分的关系,分析cTnI、CK-MB、APACHE Ⅱ在评价危重脓毒症患儿预后中的作用.方法 回顾性分析459例脓毒症患儿血清cTnI、CK-MB水平与MODS、心肌损伤、机械通气时间、ICU住院时间和病死率的关系.分别测定脓毒症患儿入院时、入院第3天、第7天血清cTnI及CK-MB水平,比较不同时间点酶学升高组和酶学正常组的APACHE Ⅱ评分、ICU病死率和30 d生存率.结果 459例危重病脓毒症患儿中205例(44.7%)发生心肌损伤[cTnI和(或)CK-MB升高],cTnI、CK-MB升高患儿的病死率远远高于cTnI、CK-MB未升高患儿(26.34% vs 2.36%),机械通气发生率(46% vs 21%)和持续时间(7.5 d vs 3.2 d),以及住院时间(11.9 d vs 5.3 d)均显著增高,血清cTnI、CK-MB水平与APACHE Ⅱ评分之间存在显著正相关.患儿入院时、入院24～72 h和入院第7天,酶学升高组APACHE Ⅱ评分、ICU病死率均明显高于酶学正常组(Pa＜0.05);而30 d生存率低于正常组(P＜0.01).结论 血清cTnI、CK-MB水平升高提示危重患儿心肌损伤的发生.血清 cTnI、CK-MB 在评价危重病患儿预后中发挥重要作用.血清cTnI、CK-MB和APACHE Ⅱ评分升高的患儿其病死率、MODS发生率、机械通气发生率及住院时间均显著增加.     

Interleukin-6 and tumor necrosis factor-alpha levels in plasma and cerebrospinal fluid of term newborn infants with hypoxic-ischemic encephalopathy

OBJECTIVES: To determine plasma and cerebrospinal fluid (CSF) levels of interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-alpha) in hypoxic-ischemic encephalopathy (HIE). STUDY DESIGN: A controlled, prospective study of 20 control neonates, 19 term newborn infants presenting with sepsis and no meningitis, and 19 asphyxiated term newborn infants. Blood and CSF samples were collected within 48 hours of birth for IL-6 and TNF-alpha determinations. RESULTS: Median plasma IL-6 was similar in sepsis and asphyxia but significantly higher than in control neonates. Median plasma TNF-alpha was similar in asphyxia and control neonates but significantly lower than in sepsis. In asphyxiated newborn infants, median CSF IL-6 and TNF-alpha were significantly higher than in sepsis and control neonates. Median CSF IL-6 was significantly higher in sepsis than in control neonates. Median CSF TNF-alpha was similar in newborn infants with sepsis and control neonates. IL-6 and TNF-alpha CSF/plasma ratios were similar in newborn infants with sepsis and control neonates but lower than in asphyxiated newborn infants. CONCLUSIONS: Term newborn infants with HIE have elevated CSF IL-6 and TNF-alpha levels. Plasma IL-6 is increased in asphyxia and sepsis. Plasma TNF-alpha is increased only in sepsis. High IL-6 and TNF-alpha CSF/plasma ratios in asphyxia suggest that these cytokines are produced in the brain of term newborn infants with HIE.     

血清S100B蛋白在新生儿窒息后脑损伤中的临床意义

目的：S100B蛋白是一种脑特异性蛋白,可反映脑损伤的程度。该研究旨在探讨窒息新生儿脐血及生后血清S100B蛋白的变化及对新生儿窒息诊断和窒息后脑损伤判断的价值。方法：对窒息新生儿的脐血及生后1,3,7d血清S100B蛋白变化进行分析。结果：①窒息新生儿脐血S100B蛋白水平高于正常对照组,差异有显著性(P<0.05),轻度窒息与重度窒息患儿脐血S100B蛋白含量差异无显著性;②出生后1～7d内轻度窒息患儿血清S100B蛋白无明显变化,重度窒息脑损伤患儿血清S100B蛋白呈逐渐增高趋势,生后第7天时重度窒息脑损伤患儿血清S100B蛋白明显高于轻度窒息患儿(P<0.01);③死亡的窒息患儿生后第7天的血清S100B蛋白含量高于存活儿,但差异无显著性(P>0.05);④发生颅内出血和/或脑水肿的患儿生后第3天血清S100B蛋白含量增高,差异有显著性(P<0.05)。结论：血清S100B蛋白检测有助于新生儿窒息的诊断及窒息后脑损伤的判断。     

Effect of birth asphyxia on serum calcium levels in neonates

Serum calcium and phosphorus levels were measured at birth, 6 hours, 24 hours, and on 5th day of life in 35 neonates with birth asphyxia (one-minute Apgar score of 6 or less), and in 37 neonates without asphyxia (one-minute Apgar score of 7 or more). Infants were divided into three groups: FT-AGA (n=30, asphyxia=15), FT-IUGR (n=20, asphyxia=10) and PT-AGA (n=22, asphyxia=10). Asphyxiated infants-FT-AGA as well as FT-IUGR-had significantly lower serum calcium levels than control infants during each of the time period studied. In PT-AGA infants with asphyxia, the serum calcium was significantly low only on 5th day of life. Lack of calcium intake, and hyperphosphatemia were identified as possible risk factors for low serum calcium in asphyxiated infants. No change in serum calcium levels was found in bicarbonatetreated asphyxiated infants in comparison to those who did not receive sodium bicarbonate. In view of the high incidence of low serum calcium in asphyxiated infants, serial monitoring of serum calcium levels is recommended in these infants.     

Myocardial Ischaemia in Aphyxia Neonatorum

ABSTRACT. Serial electrocardiograms and creatine kinase (CK) isoenzyme activities were studied prospectively in 20 asphyxiated term newborn infants and 43 normal neonates. By adapting a previously described grading system for ischaemic changes, a degree of electrocardiographic ischaemia was defined which occurred almost solely in asphyxiated infants. Infants with this degree of abnormality had signficantly higher mean CK-MB and MM activities than other asphyxiated infants at 0, 8 and 28 hours. Histological changes of peripartum myocardial necrosis were seen in 4 of the 5 infants on whom an autopsy was performed, and either electrocardiogram or CK-MB was abnormal in all four. It is concluded that myocardial injury in the newborn period is often associated with CK-MB release, but in view of the lack of cardiac-specificity of CK-MB in newborn infants, caution is urged in the interpretation of elevated isoenzyme activity in the neonate.     

Myocardial ischaemia in asphyxia neonatorum. Electrocardiographic, enzymatic and histological correlations

Serial electrocardiograms and creatine kinase (CK) isoenzyme activities were studied prospectively in 20 asphyxiated term newborn infants and 43 normal neonates. By adapting a previously described grading system for ischaemic changes, a degree of electrocardiographic ischaemia was defined which occurred almost solely in asphyxiated infants. Infants with this degree of abnormality had significantly higher mean CK-MB and MM activities than other asphyxiated infants at 0, 8 and 28 hours. Histological changes of peripartum myocardial necrosis were seen in 4 of the 5 infants on whom an autopsy was performed, and either electrocardiogram or CK-MB was abnormal in all four. It is concluded that myocardial injury in the newborn period is often associated with CK-MB release, but in view of the lack of cardiac-specificity of CK-MB in newborn infants, caution is urged in the interpretation of elevated isoenzyme activity in the neonate.