diff --git a/healthlink-his-server/healthlink-his-application/src/main/java/com/healthlink/his/web/doctorstation/appservice/impl/DoctorStationLabApplyServiceImpl.java b/healthlink-his-server/healthlink-his-application/src/main/java/com/healthlink/his/web/doctorstation/appservice/impl/DoctorStationLabApplyServiceImpl.java
index aee6e3f33..2c5ee8051 100755
--- a/healthlink-his-server/healthlink-his-application/src/main/java/com/healthlink/his/web/doctorstation/appservice/impl/DoctorStationLabApplyServiceImpl.java
+++ b/healthlink-his-server/healthlink-his-application/src/main/java/com/healthlink/his/web/doctorstation/appservice/impl/DoctorStationLabApplyServiceImpl.java
@@ -251,18 +251,16 @@ public class DoctorStationLabApplyServiceImpl implements IDoctorStationInspectio
 
         // 遍历检验申请单明细，为每个检验项目创建对应的门诊医嘱记录
         for (DoctorStationLabApplyItemDto labApplyItemDto : doctorStationLabApplyDto.getLabApplyItemList()) {
-            // 1. 根据检验项目名称查询诊疗定义（检验项目）
+            // 1. Bug #764: 使用 lab_activity_definition 表的 activityId 查询检验项目定义
+            //    检验项目存储在 lab_activity_definition 独立表中，不走 wor_activity_definition
             String itemName = labApplyItemDto.getItemName();
-            Long activityDefinitionId = activityDefinitionService.getAppointActivityDefinitionId(itemName);
-
-            if (activityDefinitionId == null) {
-                throw new RuntimeException("未找到检验项目 '" + itemName + "' 对应的诊疗定义");
+            Long labActivityId = labApplyItemDto.getActivityId();
+            if (labActivityId == null) {
+                throw new RuntimeException("检验项目 '" + itemName + "' 未传入 activityId，请重新选择检验项目");
             }
-
-            // 2. 获取诊疗定义详情
-            ActivityDefinition activityDefinition = activityDefinitionService.getById(activityDefinitionId);
-            if (activityDefinition == null) {
-                throw new RuntimeException("诊疗定义不存在");
+            LabActivityDefinition labActivityDef = labActivityDefinitionService.getById(labActivityId);
+            if (labActivityDef == null) {
+                throw new RuntimeException("检验项目 '" + itemName + "' 对应的检验项目定义不存在（ID: " + labActivityId + "）");
             }
 
             // 3. 根据执行科室代码获取科室 ID（positionId）
@@ -297,17 +295,17 @@ public class DoctorStationLabApplyServiceImpl implements IDoctorStationInspectio
 
             // 设置检验项目相关信息
             // 医嘱定义 ID（诊疗定义 ID）
-            adviceSaveDto.setAdviceDefinitionId(activityDefinitionId);
+            adviceSaveDto.setAdviceDefinitionId(labActivityId);
             // 费用定价主表 ID（对应 adm_charge_item 表的 definition_id 字段）
-            adviceSaveDto.setDefinitionId(activityDefinitionId);
+            adviceSaveDto.setDefinitionId(labActivityId);
             // 医嘱名称
             adviceSaveDto.setAdviceName(itemName);
             // 医嘱详细分类
-            adviceSaveDto.setCategoryCode(activityDefinition.getCategoryCode());
+            adviceSaveDto.setCategoryCode(labActivityDef.getCategoryCode());
             // 活动 ID（诊疗定义 ID）
-            adviceSaveDto.setActivityId(activityDefinitionId);
+            adviceSaveDto.setActivityId(labActivityId);
             // 医嘱定义对应表名
-            adviceSaveDto.setAdviceTableName("wor_activity_definition");
+            adviceSaveDto.setAdviceTableName("lab_activity_definition");
             // 执行科室 ID
             adviceSaveDto.setPositionId(positionId);
 
@@ -346,13 +344,13 @@ public class DoctorStationLabApplyServiceImpl implements IDoctorStationInspectio
             // 请求数量
             adviceSaveDto.setQuantity(labApplyItemDto.getItemQty() != null ? labApplyItemDto.getItemQty() : java.math.BigDecimal.ONE);
             // 请求单位编码（使用诊疗定义的使用单位）
-            adviceSaveDto.setUnitCode(activityDefinition.getPermittedUnitCode());
+            adviceSaveDto.setUnitCode(labActivityDef.getPermittedUnitCode());
 
             // 单价处理（BugFix#CodeReview: 根据套餐ID从正确的数据源获取价格）
             // 套餐项目：从 inspection_basic_information 表获取 package_amount
             // 普通项目：使用前端传入的 itemPrice（已从诊疗项目获取）
             java.math.BigDecimal unitPrice;
-            Long feePackageId = activityDefinition.getFeePackageId();
+            Long feePackageId = labActivityDef.getFeePackageId();
 
             if (feePackageId != null) {
                 // 套餐项目：查询套餐价格