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首页> 外文期刊>Neurosurgery >The diagonal ventricular dimension: a method for predicting shunt malfunction on the basis of changes in ventricular size.
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The diagonal ventricular dimension: a method for predicting shunt malfunction on the basis of changes in ventricular size.

机译：心室对角线尺寸：一种基于心室大小变化来预测分流功能不全的方法。

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OBJECTIVE: Serial computed tomographic and magnetic resonance imaging studies are critical in the evaluation of patients who present with symptoms and signs of recurrent hydrocephalus or possible ventricular shunt malfunction. Subtle changes in ventricular volume or complex variations in ventricular anatomy often make subjective assessment of changes in ventricular size difficult, and no previously described method relates these changes to intracranial pressure or shunt system function. The purpose of this study was to develop an objective, reproducible, simple linear method of detecting changes in ventricular size that provides an accurate reflection of shunt function on the basis of serial imaging studies. METHODS: We developed a simple, linear estimate of ventricular volume-the diagonal ventricular dimension-to objectively assess changes in ventricular size on serial computed tomographic scans and magnetic resonance imaging scans. Serial imaging studies for 14 patients ages 1.6 to 71 years who underwent evaluation for shunt malfunction were used in this study. The sensitivity and specificity of this method in predicting shunt malfunction was compared with other well-established linear estimates of ventricular size as well as with a radiologist's interpretation of the same studies. The "gold standard" for measuring the status of ventricular shunt system function in this study was the measurement of intracranial pressure via shunt tap or surgical exploration results. RESULTS: The sensitivity (100%) and specificity (100%) of the diagonal ventricular dimension in detecting changes in ventricular size consistent with shunt malfunction was superior to that of any other linear estimate and to a radiologist's interpretation of the same films. CONCLUSION: The diagonal ventricular dimension provides an objective, simple linear method of assessing changes in ventricular size that correlates well with shunt system function in the context of a collaborative examination.
机译：目的：连续计算机断层扫描和磁共振成像研究对于评估出现复发性脑积水症状或体征或可能的心室分流功能不全的患者至关重要。心室体积的细微变化或心室解剖结构的复杂变化通常使对心室大小变化的主观评估变得困难，并且以前没有描述的方法将这些变化与颅内压或分流系统功能相关联。这项研究的目的是开发一种客观的，可重复的，简单的线性方法来检测心室大小的变化，该方法可在串行成像研究的基础上准确反映分流功能。方法：我们开发了一种简单的线性心室体积估计值（对角心室尺寸），以客观地评估连续计算机断层扫描和磁共振成像扫描中心室大小的变化。本研究使用了14例年龄在1.6至71岁之间的患者，这些患者接受了分流器功能评估。将这种方法在预测分流失灵中的敏感性和特异性与其他公认的心室大小线性估计值以及放射科医生对相同研究的解释进行了比较。在这项研究中，测量心室分流系统功能状态的“黄金标准”是通过分流水龙头或手术探查结果测量颅内压。结果：在检测符合分流功能的心室大小变化时，对角心室尺寸的敏感性（100％）和特异性（100％）优于任何其他线性估计和放射线医师对相同胶片的解释。结论：心室对角线尺寸是一种客观，简单的线性方法，用于评估心室大小的变化，该方法在协作检查的情况下与分流系统功能密切相关。

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