三维容积超声测量部分肢体体积在胎儿体重估测中的应用价值

目的分析三维容积超声测量部分肢体体积在胎儿体重估测中的应用价值情况。方法选择2015年4月至2019年4月在安阳市第三人民医院接受检查以及分娩的产妇206例的临床资料。产妇均接受三维超声部分肢体体积联合二维超声检查,分析其结果。结果把出生体重和超声参数开展相关性分析,探究大腿中段50%体积(TVol)、上臂中段50%体积(AVol)、大腿中段软组织厚度情况(STT)、腹围(AC)、股骨长(FL)、头围(HC)、双顶径(BPD)与新生儿出生体重呈现为线性关系。相关系数(r)分别为:0.816、0.701、0.544、0.590、0.377、0.411、0.399(P<0.05)。将新生儿出生体重视为因变量,把TVol、AVol、STT、AC、FL、HC、BPD视为自变量,开展多元回归分析依照具体的回归结果,TVol、AVol、AC、HC视为自变量,拟出多元线性回归方程,即:y=-2.751.157+6.785x1+8.775x2+13.594x3+4.582x4。对R方加以调整为0.795,证明拟合方程能体现出原始性数据。回归方程结果:F=51.258,P=0.000。结论利用三维超声可测量胎儿部分肢体体积,可在超声预测胎儿体重中发挥非常重要的作用,且该法有着操作简单、重复性高的优点,因此值得进一步在临床中推广应用。     

傅青主保产无忧散的临床应用进展

为了解傅青主保产无忧散的临床应用情况，本文从傅青主保产无忧散的起源、药理作用、临床研究等方面对保产无忧散进行梳理分析，发现保产无忧散有养血、益气、理气的作用。临床上具有防治难产，治疗多种原因导致的先兆流产、早产，可将晚期妊娠臀位、横位转为头位以利于阴道分娩，对过期妊娠有一定的催引产效果，对于妊娠期特发性黄疸、肝功能异常等妊娠期并发症有防治作用，还可用于治疗胃脘痛，配合针刺促卵泡发育治疗女性不孕症，值得进一步研究。     

Radioimmunoassay for rat galanin: immunochemical and chromatographic characterization of immunoreactivity in tissue extracts

Galanin is a regulatory peptide with wide distribution in the central and peripheral nervous system and with numerous biological effects. Several radioimmunoassays based on antisera raised against porcine galanin have been used to measure immunoreactivity in rat tissues. However, considerable lack of parallelism has been observed between the porcine standard and rat tissue extracts, which may decrease the reliability of the quantitative data. The purpose of the present study was therefore to raise antibodies against rat galanin and establish a competitive radioimmunoassay for rat galanin. Two antisera, RatGal4 and RatGal5, were characterized in detail. The homogeneity of the immunoreactive material from several tissues was also investigated with column chromatography. At reverse-phase high-pressure liquid chromatography more than 95% of the immunoreactive material from rat CNS eluted as a single peak in the position of synthetic rat galanin, whereas almost half of the immunoreactive material from the intestine eluted in positions different from the synthetic peptide. Extracts of rat brains as well as jejunum diluted in parallel with the standard curve for both antisera. We conclude that measurements of rat galanin based on these antisera are therefore more reliable than those based on antisera raised against porcine galanin.     

产前超声筛查胎儿先天性心脏病的诊断价值及高危因素分析

目的 探讨产前超声筛查胎儿先天性心脏病的临床价值并分析其高危因素。方法 应用回顾性分析2019年1月—2020年7月在本院接受产前胎儿先天性心脏病超声筛查的2 869例孕妇的临床资料,计算超声对胎儿先天性心脏病的诊断灵敏度、特异度及准确度。将发生胎儿先天性心脏病者作为先天性心脏病组,未发生者作为正常组。采用Logistic回归分析胎儿发生先天性心脏病的高危因素。结果 2 869例孕妇中126例发生胎儿先天性心脏病,检出率为4.39%,超声检查结果灵敏度为87.30%(110/126)、特异度为88.52%(2 428/2 743)、准确度为88.46%(2 538/2 869)。与正常组相比,先天性心脏病组胎儿早期颈项透明层(nuchal translucency,NT)值高或患有颈部淋巴水囊瘤(61.90%)、母亲患有结缔组织病或糖尿病(64.29%)、先天性心脏病家族史(77.78%)、羊水异常(62.70%)占比均高于正常组的35.29%、46.85%、60.30%、44.29%(χ2=36.850、14.688、15.480、16.479,P值均＜0.001)。经Logistic回归分析,胎儿早期NT值高或患有颈部淋巴水囊瘤、母亲患有结缔组织病或糖尿病、先天性心脏病家族史与羊水异常均为导致胎儿先天性心脏病的高危因素(P＜0.001)。结论 产前超声筛查对于胎儿先天性心脏病的诊断价值高,胎儿早期NT值高或患有颈部淋巴水囊瘤、母亲患有结缔组织病或糖尿病、先天性心脏病家族史与羊水异常均为导致胎儿先天性心脏病的高危因素。     

Quantitative assessment of global cerebral metabolic rate of oxygen (CMRO2) in neonates using MRI

The cerebral metabolic rate of oxygen (CMRO₂) is the rate of oxygen consumption by the brain, and is thought to be a direct index of energy homeostasis and brain health. However, in vivo measurement of CMRO₂ is challenging, in particular for the neonatal population, in whom conventional radiotracer methods are not applicable because of safety concerns. In this study, we propose a method to quantify global CMRO₂ in neonates based on arteriovenous differences in oxygen content, and employ separate measurements of oxygenation and cerebral blood flow (CBF) parameters. Specifically, arterial and venous oxygenation levels were determined with pulse oximetry and the novel T₂ relaxation under spin tagging (TRUST) MRI, respectively. Global CBF was measured with phase contrast (PC) flow velocity MRI. The proposed method was implemented on a standard 3‐T MRI scanner without the need for any exogenous tracers, and the total scan duration was less than 5 min. We demonstrated the feasibility of this method in 12 healthy neonates within an age range of 35–42 gestational weeks. CMRO₂ values were successfully obtained from 10 neonates. It was found that the average CMRO₂ in this age range was 38.3 ± 17.7 µmol/100 g/min and was positively correlated with age (p = 0.007; slope, 5.2 µmol/100 g/min per week), although the highest CMRO₂ value in this age range was still less than half of the adult level. Test–retest studies showed a coefficient of variation of 5.8 ± 2.2% between repeated CMRO₂ measurements. In addition, given the highly variable blood flow velocity within this age range, it is recommended that the TRUST labeling thickness and position should be determined on a subject‐by‐subject basis, and an automatic algorithm was developed for this purpose. Although this method provides a global CMRO₂ measure only, the clinical significance of an energy consumption marker and the convenience of this technique may make it a useful tool in the functional assessment of the neonatal population. Copyright © 2014 John Wiley & Sons, Ltd.