探讨L33-8s高频线阵超声探头在眼部睫状体离断诊断中的应用价值。

选取2024年6月至2025年8月在北京同仁医院眼科就诊的经超声生物显微镜（UBM）检查确诊为睫状体离断的30例患者（30只患眼）作为病例组，另选取对侧健康眼30只作为对照组。所有纳入眼分别采用L33-8s与L20-5s线阵探头进行超声检查，以UBM结果为金标准，计算2种探头的诊断敏感度、特异度、阳性预测值、阴性预测值及准确性，采用McNemar检验比较2种探头诊断敏感度和准确性的差异，采用四格表χ²检验比较阴性预测值的差异。绘制受试者操作特征（ROC）曲线评估2种超声探头的诊断效能，计算曲线下面积（AUC）。根据UBM所示睫状体离断范围，将病例组眼分为1~4级，计算2种探头对不同分级睫状体离断的检出率。

L33-8s探头诊断睫状体离断的敏感度为86.7%（26/30），阴性预测值为88.2%，准确性为93.3%；L20-5s探头的诊断敏感度为63.3%（19/30），阴性预测值为73.2%，准确性为81.7%；L33-8s探头的诊断敏感度及准确性高于L20-5s探头，差异具有统计学意义（χ²=5.143，P=0.023；χ²=5.143，P=0.023），阴性预测值高于L20-5s探头，差异无统计学意义（P＞0.05）。2种探头的诊断特异度及阳性预测值均为100%。ROC曲线分析显示，L33-8s探头的AUC为0.933，高于L20-5s探头的0.817。L33-8s探头对1级和2级睫状体离断的检出率高于L20-5s探头（75.0% vs 33.3%；90.0% vs 70.0%）。

L33-8s高频探头可提高对睫状体离断的诊断效能，对小范围（低分级）睫状体离断的诊断优势明显。

To evaluate the diagnostic value of the L33-8s linear array ultrasound probe in detecting ciliary body detachment (CBD).

A total of 30 patients (30 eyes) diagnosed with CBD by ultrasound biomicroscopy (UBM) at the Department of Ophthalmology, Beijing Tongren Hospital from June 2024 to August 2025 were included in the case group, while the 30 contralateral healthy eyes were used as controls. All enrolled eyes were examined with both the L33-8s and L20-5s linear array probes. Taking UBM findings as the gold standard, the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of both probes were calculated. The McNemar's test was used to compare the differences in sensitivity and accuracy, and a 2×2 chi-square test was used to compare the difference in negative predictive value. Receiver operating characteristic (ROC) curves were plotted, and the area under the curve (AUC) was calculated to evaluate diagnostic capability. The case group was classified into grades 1–4 based on the extent of CBD detected by UBM, and the detection rates of the two probes across different grades were compared.

The L33-8s probe demonstrated a sensitivity of 86.7% (26/30), negative predictive value of 88.2%, and accuracy of 93.3%, while the L20-5s probe yielded corresponding values of 63.3% (19/30), 73.2%, and 81.7%. Statistically significant differences were observed between the two probes in both sensitivity (χ²=5.143, P=0.023) and accuracy (χ²=5.143, P=0.023). The negative predictive value of the L33-8s probe was higher than that of the L20-5s probe, but the difference was not statistically significant (P＞0.05). Both probes demonstrated a specificity and positive predictive value of 100%. ROC curve analysis showed that the AUC of the L33-8s probe was 0.933, which was higher than that of the L20-5s probe (AUC=0.817). The L33-8s probe had significantly higher detection rates for grade 1 and grade 2 CBD than the L20-5s probe (75.0% vs 33.3%; 90.0% vs 70.0%).

The L33-8s probe demonstrates superior diagnostic performance for CBD compared with the L20-5s probe, especially for cases with a small extent of detachment.