目的 探讨无窒息的宫内窘迫胎儿出生后是否合并有心肌损伤,以及检测心肌损伤的生化敏感指标.方法 2009年7月至12月,随机选择中山大学附属第一医院分娩的、有宫内窘迫史的53例新生儿为宫内窘迫组,新生儿出生后Apgar评分1 min及5 min均＞7分.同期分娩的无宫内窘迫史的新生儿36例作为对照组,新生儿出生后Apgar评分1 min及5 min均为10分.胎儿娩出后立即抽取脐动脉血进行血气分析和生化指标测定.结果 (1)宫内窘迫组新生儿脐动脉血pH值及剩余碱分别为7.23±0.07及(-4.8±3.0)mmol/L,明显低于对照组的7.31±0.03及(-2.1±1.5)mmol/L,两组比较,差异有统计学意义(P＜0.05).宫内窘迫组新生儿脐动脉血乳酸水平为(5.2±2.3)mmol/L,明显高于对照组的(2.3±1.1)mmol/L,两组比较,差异有统计学意义(P＜0.01).宫内窘迫组新生儿脐动脉血氧分压及二氧化碳分压水平分别为(16.2±7.9)及(54.0±11.2)mm Hg(1mm Hg=0.133 kPa),对照组分别为(17.5±6.7)及(48.5±5.4)mm Hg,两组分别比较,差异均无统计学意义(P＞0.05).(2)宫内窘迫组新生儿脐动脉血肌酸激酶同工酶MB(CK-MB)水平为(48±59)U/L,对照组为(36±27)U/L,两组比较,差异有统计学意义(P＜0.05);宫内窘迫组新生儿脐动脉血肌酸激酶(CK)及脑钠肽(BNP)水平分别为(194±73)U/L及(519±309)ng/L,对照组分别为(162±95)及(481±216)ng/L,两组比较,差异无统计学意义(P＞0.05).(3)新生儿脐动脉血CKMB水平与脐动脉血pH值、剩余碱呈负相关性(r=-0.296及-0.318,P均＜0.05);BNP与乳酸水平呈正相关(r=0.278,P＜0.05);其余各变量间均无相关性(P＞0.05).结论 宫内窘迫的胎儿即使出生时无新生儿窒息的表现,也存在着不同程度的心肌损伤;脐血CK-MB水平变化可作为监测心肌损伤的敏感指标,心肌损伤的程度与胎儿酸中毒的程度有关.%Objective To investigate whether no asphyxia neonates with intrauterine distress are complicated with myocardial injury and determine the sensitive biochemical diagnostic parameters. Methods A total of 89 neonates born in the First Affiliated Hospital of Sun Yat-sen University from July 2009 to December 2009 were enrolled. Fifty-three fetal distress cases with Apgar score ＞ 7 at 1 and 5 minites were enrolled in the study group; while the rest 36 healthy neonates, whose Apgar score = 10 at 1 and 5 minites, were the control group. Umbilical artery blood samples of all cases were collected for blood gas analysis and biochemical measurement. Results(1)pH(7.23±0.07) and BE [(-4.8±3.0)mmol/L] in the study group were significantly lower than pH (7.31 ±0.03) and BE [(-2.1±1.5)mmol/L] in the control group (P＜0.05).The lactic acid of study group [(5.2±2.3)mmol/L] was higher than that of the control group [(2.3±1.1)mmol/L], and the difference was significant (P＜0.01). However, there was no significant difference between the two groups in PaO2[(16.2±7.9)mm Hg(1 mm Hg=0.133 kPa) vs. (17.5±6.7)mm Hg] and PaCO2[(54.0±11.2)mm Hg vs. (48.5±5.4) mm Hg; P＞0. 05]. (2) The level of CK-MB in neonates with fetal distress[(48 ±59) U/L] was significantly higher than that of healthy neonates [(36±27)U/L]. However, no significant difference was found in CK [(194±73)U/L vs. (162±95) U/L]and BNP levels[(519±309)ng/L vs.(481±216)ng/L;P ＞ 0.05]. (3) Spearman rank correlation analysis showed that CK-MB level was negatively correlated with pH(r=-0.296, P＜0.05) and BE (r=-0.318,P＜0.05) of umbilical artery blood,while BNP level was positively correlated with umbilical lactic acid (r=0.278, P＜0.05). No correlation was found between other parameters (P＞0.05).Conclusions Intrauterine distress without neonatal asphyxia had effect on fetal myocardial injury. CK-MB can be used as a sensitive parameter for monitoring the development of myocardial injury. The severity of myocardial injury was related to fetal acidosis.
展开▼
