磁共振成像胆道评分和肝肌比值对肝占位患者术前肝储备功能的评估价值
Application value of preoperative assessment of liver reserve function based on magnetic resonance cholangiopancreatography-related parameters and liver-to-muscle ratio in patients with hepatic space-occupying lesion
目的 本研究通过构建基于磁共振胆道相关参数和肝肌比的Nomogram预测模型,探讨该预测模型在肝占位患者术前肝储备功能评估中的应用价值。 方法 收集2022年4月—2024年4月在广西医科大学附属武鸣医院住院并拟行手术的112例肝占位患者的临床资料和钆塞酸二钠增强MRI的影像资料。根据肝损伤程度,将患者分为肝功能代偿良好组(Child-Pugh A级65例)、肝功能失代偿组(Child-Pugh B级42例,C级5例)。测量两组患者不同增强扫描时期的肝肌比、胆总管相对强化程度及胆道评分,并运用单因素和多因素Logistic回归分析筛选独立的预测因素,进而构建Nomogram模型。同时绘制受试者操作特征曲线(ROC曲线)、校正曲线、决策曲线,以评估模型的区分度、准确性和临床应用价值。计量资料符合正态分布的数据两组间比较采用成组t检验;符合偏态分布的数据两组间比较采用Mann-Whitney U检验。计数资料两组间比较采用χ2检验。 结果 两组间肝胆期5 min肝肌比(Z=-3.99)、肝胆期10 min肝肌比(Z=-4.39)、肝胆期15 min肝肌比(Z=-4.23)、肝胆期20 min肝肌比(Z=-5.40)、胆总管相对强化程度(Z=-4.85)及胆道评分(t=7.99)比较差异均有统计学意义(P值均0.001)。多因素Logistic回归分析显示,肝胆期10 min肝肌比(OR=0.63,95%CI:0.44~0.90)、肝胆期20 min肝肌比(OR=0.38,95%CI:0.17~0.82)及胆道评分(OR=0.17,95%CI:0.07~0.39)是术前诊断肝功能失代偿的独立影响因素(P值均0.05)。基于肝胆期10 min肝肌比、肝胆期20 min肝肌比及胆道评分建立的Nomogram模型术前诊断肝功能失代偿的ROC曲线下面积为0.905(95%CI:0.849~0.960),敏感度为78.7%,特异度为89.2%。 结论 基于肝胆期10 min肝肌比、肝胆期20 min肝肌比及胆道评分构建的列线图模型,在术前能有效评估拟接受手术治疗的肝占位患者的肝储备功能状态。
Objective To establish a nomogram predictive model based on magnetic resonance cholangiopancreatography-related parameters and liver-to-muscle ratio, and to investigate the application value of this model in preoperative assessment of liver reserve function in patients with hepatic space-occupying lesion. Methods Clinical data and Gd-EOB-DTPA MRI imaging data were collected from 112 patients with hepatic space-occupying lesion who were hospitalized and scheduled for surgery in Wuming Hospital of Guangxi Medical University from April 2022 to April 2024. According to the degree of liver injury, the patients were divided into Child-Pugh class A group (65 patients with compensated liver function) and Child-Pugh class B+C group (47 patients with decompensated liver function, including 42 patients with Child-Pugh class B liver function and 5 patients with Child-Pugh class C liver function). The two groups of patients were measured in terms of liver-to-muscle ratio, relative signal intensity of the common bile duct, and bile duct score in different phases of contrast-enhanced CT scan, and univariate and multivariate Logistic regression analyses were used to identify independent predictive factors and establish a nomogram model. In addition, the receiver operating characteristic (ROC) curve, the calibration curve, and the decision curve were plotted to assess the discriminatory ability, accuracy, and clinical application value of the model. The independent-samples t test was used for comparison of normally distributed continuous data between two groups, and the Mann-Whitney U test was used for comparison of data with skewed distribution between two groups; the chi-square test was used for comparison of categorical data between two groups. Results There were significant differences between the two groups in liver-to-muscle ratio at 5 minutes (Z=-3.99, P0.001), 10 minutes (Z=-4.39, P0.001), 15 minutes (Z=-4.23, P0.001), and 20 minutes (Z=-5.40, P0.001) during the hepatobiliary phase, the relative enhancement degree of the common bile duct (Z=-4.85, P0.001), and bile duct score (t=7.99, P0.001). The multivariate Logistic regression analysis showed that liver-to-muscle ratio at 10 minutes during the hepatobiliary phase (odds ratio [OR]=0.63, 95% confidence interval [CI]: 0.44 — 0.90, P0.05), liver-to-muscle ratio at 20 minutes during the hepatobiliary phase (OR=0.38, 95%CI: 0.17 — 0.82, P0.05), and bile duct score (OR=0.17, 95%CI: 0.07 — 0.39, P0.05) were independent influencing factors for the preoperative diagnosis of liver function decompensation. The nomogram model established based on liver-to-muscle ratio at 10 minutes during the hepatobiliary phase, liver-to-muscle ratio at 20 minutes during the hepatobiliary phase, and bile duct score had an area under the ROC curve of 0.905 (95%CI: 0.849 — 0.960), with a sensitivity of 78.7% with a specificity of 89.2%. Conclusion The nomogram model established based on the liver-to-muscle ratio at 10 and 20 minutes during the hepatobiliary phase and bile duct score can effectively assess the status of liver reserve function in patients with hepatic space-occupying lesion before surgery.
Liver Neoplasms / Magnetic Resonance Imaging / Nomograms
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广西医疗卫生适宜技术开发与推广应用项目(S2020045)
广西医科大学附属武鸣医院院级科研课题项目(YNXM2025003)
北京医学奖励基金会(YXJL-2023-0866-0323)
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