diff --git a/openhis-ui-vue3/src/views/doctorstation/components/examination/examinationApplication.vue b/openhis-ui-vue3/src/views/doctorstation/components/examination/examinationApplication.vue
index ea7dfba0b..14fa2b0fb 100755
--- a/openhis-ui-vue3/src/views/doctorstation/components/examination/examinationApplication.vue
+++ b/openhis-ui-vue3/src/views/doctorstation/components/examination/examinationApplication.vue
@@ -730,7 +730,9 @@ function handleCollapseChange(activeName) {
   setTimeout(() => { isAnimating.value = false; }, 300);  // 与 CSS 过渡时长一致
 
   if (activeName) {
-    const cat = filteredCategoryList.value.find(c => c.typeId == activeName);
+    // Bug #428修复: 直接从 categoryList（原始响应式数组）查找分类，
+    // 确保后续 handleCategoryExpand 对 cat.methods 的赋值能正确触发 Vue 响应式更新
+    const cat = categoryList.value.find(c => c.typeId == activeName);
     if (cat && (!cat.methods || cat.methods.length === 0)) {
       handleCategoryExpand(cat);  // 异步加载，不 await
     }
@@ -1149,7 +1151,8 @@ async function handleMethodSelect(checked, method, cat) {
     // 如果该项目不存在，创建一个并关联方法
     if (selectedItems.value.length > 0) {
       const currentCategory = selectedItems.value[0].checkType;
-      const newCategory = cat.typeCode || '';
+      // Bug #428修复: 使用 cat.typeName 进行比较（与 newItem.checkType 保持一致）
+      const newCategory = cat.typeName || '';
       if (currentCategory !== newCategory) {
         ElMessage.warning('一个检查单不能同时选择多个项目类型的检查项目');
         return;
@@ -1234,7 +1237,8 @@ async function handleItemSelect(checked, item, cat) {
 
     if (selectedItems.value.length > 0) {
       const currentCategory = selectedItems.value[0].checkType;
-      const newCategory = cat.typeCode || '';
+      // Bug #428修复: 使用 cat.typeName 进行比较（与 effectiveCheckType 保持一致）
+      const newCategory = cat.typeName || '';
       if (currentCategory !== newCategory) {
         ElMessage.warning('一个检查单不能同时选择多个项目类型的检查项目');
         item.checked = false;