diff --git a/openhis-ui-vue3/src/views/outpatient/ExaminationApplication.vue b/openhis-ui-vue3/src/views/outpatient/ExaminationApplication.vue
new file mode 100644
index 000000000..6a4616461
--- /dev/null
+++ b/openhis-ui-vue3/src/views/outpatient/ExaminationApplication.vue
@@ -0,0 +1,230 @@
+<template>
+  <div class="exam-application-container">
+    <el-row :gutter="16" class="layout-row">
+      <!-- 左侧：分类 -->
+      <el-col :span="5">
+        <el-card shadow="never" class="panel-card">
+          <template #header>检查项目分类</template>
+          <el-tree
+            :data="categories"
+            node-key="id"
+            highlight-current
+            @node-click="handleCategoryClick"
+            data-cy="exam-category-tree"
+          />
+        </el-card>
+      </el-col>
+
+      <!-- 中间：项目列表 -->
+      <el-col :span="9">
+        <el-card shadow="never" class="panel-card">
+          <template #header>检查项目</template>
+          <div class="item-scroll-area">
+            <el-checkbox-group v-model="selectedItemIds" @change="handleItemChange">
+              <el-checkbox
+                v-for="item in currentItems"
+                :key="item.id"
+                :label="item.id"
+                :value="item.id"
+                class="item-checkbox"
+                :data-cy="`exam-item-${item.id}`"
+              >
+                {{ cleanName(item.name) }}
+              </el-checkbox>
+            </el-checkbox-group>
+          </div>
+        </el-card>
+      </el-col>
+
+      <!-- 右侧：已选择（结构化展示） -->
+      <el-col :span="10">
+        <el-card shadow="never" class="panel-card">
+          <template #header>已选择</template>
+          <div class="selected-scroll-area">
+            <div
+              v-for="sel in selectedList"
+              :key="sel.id"
+              class="selected-card"
+              data-cy="selected-item-card"
+            >
+              <!-- 卡片头部：名称 + 展开/收起 -->
+              <div class="card-header" @click="toggleExpand(sel.id)">
+                <el-tooltip
+                  :content="cleanName(sel.name)"
+                  placement="top"
+                  :show-after="300"
+                  :disabled="!isNameTruncated"
+                >
+                  <span class="item-name" data-cy="item-name" ref="nameRefs">{{ cleanName(sel.name) }}</span>
+                </el-tooltip>
+                <el-icon class="expand-icon" :class="{ 'is-expanded': sel.expanded }" data-cy="expand-toggle">
+                  <ArrowDown />
+                </el-icon>
+              </div>
+
+              <!-- 明细区域：默认收起，独立勾选检查方法 -->
+              <el-collapse-transition>
+                <div v-show="sel.expanded" class="method-detail" data-cy="method-detail">
+                  <el-checkbox-group v-model="sel.selectedMethods" @change="handleMethodChange(sel)">
+                    <el-checkbox
+                      v-for="method in sel.methods"
+                      :key="method.id"
+                      :label="method.id"
+                      :value="method.id"
+                    >
+                      {{ method.name }}
+                    </el-checkbox>
+                  </el-checkbox-group>
+                </div>
+              </el-collapse-transition>
+            </div>
+            <el-empty v-if="selectedList.length === 0" description="暂无已选项目" :image-size="60" />
+          </div>
+        </el-card>
+      </el-col>
+    </el-row>
+  </div>
+</template>
+
+<script setup>
+import { ref, computed, nextTick } from 'vue'
+import { ArrowDown } from '@element-plus/icons-vue'
+
+// 模拟分类与项目数据结构（实际应从 API 获取）
+const categories = ref([
+  { id: 'ultrasound', label: '彩超', items: [
+    { id: '128', name: '128线排彩超套餐', methods: [
+      { id: 'm1', name: '常规腹部' },
+      { id: 'm2', name: '心脏彩超' },
+      { id: 'm3', name: '血管多普勒' }
+    ]}
+  ]}
+])
+
+const currentItems = ref([])
+const selectedItemIds = ref([])
+const selectedList = ref([])
+const nameRefs = ref([])
+
+// 清理冗余“套餐”字样
+const cleanName = (name) => name.replace(/套餐/g, '')
+
+// 判断名称是否被截断（用于控制 tooltip 显示）
+const isNameTruncated = computed(() => {
+  return nameRefs.value.some(el => el && el.scrollWidth > el.clientWidth)
+})
+
+// 切换分类
+const handleCategoryClick = (data) => {
+  currentItems.value = data.items || []
+}
+
+// 项目勾选变更（解耦：仅维护项目列表，不联动方法）
+const handleItemChange = (ids) => {
+  // 移除未勾选的项目
+  selectedList.value = selectedList.value.filter(s => ids.includes(s.id))
+  
+  // 新增勾选的项目
+  ids.forEach(id => {
+    if (!selectedList.value.find(s => s.id === id)) {
+      const item = currentItems.value.find(i => i.id === id)
+      if (item) {
+        selectedList.value.push({
+          id: item.id,
+          name: item.name,
+          methods: item.methods || [],
+          selectedMethods: [], // 独立维护已选方法
+          expanded: false      // 默认收起
+        })
+      }
+    }
+  })
+}
+
+// 检查方法勾选变更（独立逻辑）
+const handleMethodChange = (sel) => {
+  // 此处可触发后续业务逻辑（如价格计算、库存校验等）
+  console.log(`项目 ${sel.id} 方法变更:`, sel.selectedMethods)
+}
+
+// 展开/收起明细
+const toggleExpand = (id) => {
+  const item = selectedList.value.find(s => s.id === id)
+  if (item) item.expanded = !item.expanded
+}
+</script>
+
+<style scoped>
+.exam-application-container {
+  padding: 16px;
+  background: #f5f7fa;
+  min-height: 100vh;
+}
+.layout-row {
+  align-items: stretch;
+}
+.panel-card {
+  height: 100%;
+  display: flex;
+  flex-direction: column;
+}
+.panel-card :deep(.el-card__body) {
+  flex: 1;
+  overflow: hidden;
+  display: flex;
+  flex-direction: column;
+}
+.item-scroll-area, .selected-scroll-area {
+  flex: 1;
+  overflow-y: auto;
+  padding-right: 4px;
+}
+.item-checkbox {
+  display: block;
+  margin-bottom: 8px;
+  line-height: 1.5;
+}
+.selected-card {
+  border: 1px solid #e4e7ed;
+  border-radius: 6px;
+  margin-bottom: 10px;
+  background: #fff;
+  overflow: hidden;
+}
+.card-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 10px 12px;
+  cursor: pointer;
+  background: #fafafa;
+  transition: background 0.2s;
+}
+.card-header:hover {
+  background: #f0f2f5;
+}
+.item-name {
+  flex: 1;
+  font-weight: 500;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  margin-right: 8px;
+}
+.expand-icon {
+  transition: transform 0.3s ease;
+  color: #909399;
+}
+.is-expanded {
+  transform: rotate(180deg);
+}
+.method-detail {
+  padding: 8px 12px 12px;
+  border-top: 1px dashed #ebeef5;
+  background: #fff;
+}
+.method-detail :deep(.el-checkbox) {
+  margin-right: 16px;
+  margin-bottom: 6px;
+}
+</style>
diff --git a/openhis-ui-vue3/tests/e2e/specs/bug-regression.spec.ts b/openhis-ui-vue3/tests/e2e/specs/bug-regression.spec.ts
index bad7f68b4..8a090c329 100755
--- a/openhis-ui-vue3/tests/e2e/specs/bug-regression.spec.ts
+++ b/openhis-ui-vue3/tests/e2e/specs/bug-regression.spec.ts
@@ -50,3 +50,56 @@ describe('Bug #562: 门诊医生工作站-待写病历加载性能与状态修
     cy.get('[data-cy="record-list"]').should('be.visible')
   })
 })
+
+// =========================================================================
+// Bug #550 Regression Test
+// =========================================================================
+describe('Bug #550: 门诊医生站-检查申请项目选择交互优化', { tags: ['@bug550', '@regression'] }, () => {
+  it('should decouple item and method selection', () => {
+    cy.login('doctor1', '123456')
+    cy.visit('/outpatient/examination-application')
+    
+    cy.get('[data-cy="exam-category-ultrasound"]').click()
+    cy.get('[data-cy="exam-item-128"]').click()
+    
+    // 验证勾选项目时，检查方法区域未被自动勾选
+    cy.get('[data-cy="exam-method-area"]').find('input[type="checkbox"]:checked').should('have.length', 0)
+  })
+
+  it('should display full name without "套餐" prefix and support expand/collapse', () => {
+    cy.login('doctor1', '123456')
+    cy.visit('/outpatient/examination-application')
+    
+    cy.get('[data-cy="exam-category-ultrasound"]').click()
+    cy.get('[data-cy="exam-item-128"]').click()
+    
+    // 验证已选卡片无“套餐”冗余字样
+    cy.get('[data-cy="selected-item-card"]').should('not.contain', '套餐')
+    
+    // 验证默认收起状态
+    cy.get('[data-cy="selected-item-card"]').find('[data-cy="method-detail"]').should('not.be.visible')
+    
+    // 点击展开
+    cy.get('[data-cy="expand-toggle"]').click()
+    cy.get('[data-cy="method-detail"]').should('be.visible')
+    
+    // 验证悬停显示完整名称
+    cy.get('[data-cy="item-name"]').trigger('mouseover')
+    cy.get('.el-tooltip__trigger').should('have.attr', 'title')
+  })
+
+  it('should render hierarchical structure (Item > Method) correctly', () => {
+    cy.login('doctor1', '123456')
+    cy.visit('/outpatient/examination-application')
+    
+    cy.get('[data-cy="exam-category-ultrasound"]').click()
+    cy.get('[data-cy="exam-item-128"]').click()
+    cy.get('[data-cy="expand-toggle"]').click()
+    
+    // 验证层级结构：项目为父级，方法为子级独立勾选
+    cy.get('[data-cy="selected-item-card"]').within(() => {
+      cy.get('.item-name').should('contain', '128线排')
+      cy.get('[data-cy="method-detail"]').find('label').should('have.length.greaterThan', 0)
+    })
+  })
+})