diff --git a/src/main/java/com/openhis/web/outpatient/mapper/OrderMapper.java b/src/main/java/com/openhis/web/outpatient/mapper/OrderMapper.java
index e495efb58..e05fa5618 100644
--- a/src/main/java/com/openhis/web/outpatient/mapper/OrderMapper.java
+++ b/src/main/java/com/openhis/web/outpatient/mapper/OrderMapper.java
@@ -1,47 +1,49 @@
 package com.openhis.web.outpatient.mapper;
 
-import com.openhis.web.outpatient.dto.OrderDTO;
 import org.apache.ibatis.annotations.*;
-
 import java.util.List;
+import java.util.Map;
 
 /**
- * 门诊医嘱相关数据库操作 Mapper
+ * 门诊医嘱相关数据访问层
  *
- * 关键修复（Bug #561）：
- * 1. 在查询医嘱列表时，联表查询字典表（his_dict）获取“总量单位”的中文名称。
- *    之前仅返回 total_unit_id，导致前端展示为 null 或者数字 ID。
- *    现在返回 total_unit_name，并映射到 DTO 的 totalUnitName 字段。
+ * 修复 Bug #561：
+ *   医嘱录入后，总量单位显示为 “null”。根因是查询医嘱时未把诊疗目录中配置的
+ *   “total_unit” 字段取出来，导致前端取到的值为 null。此处在查询医嘱列表
+ *   时通过 LEFT JOIN 诊疗目录表（treatment_catalog），并将 total_unit
+ *   映射为 totalUnit（前端使用的属性名），从而保证即使医嘱本身没有该字段，
+ *   也能得到正确的单位值。
  */
 @Mapper
 public interface OrderMapper {
 
-    // 其它已有方法省略 ...
-
     /**
-     * 查询门诊医嘱列表（含总量单位中文名称）。
+     * 查询门诊医嘱列表（含总量单位）。
      *
-     * @param doctorId 医生 ID
-     * @return 包含总量单位中文名称的医嘱 DTO 列表
+     * @param patientId 患者 ID
+     * @return 医嘱列表，每条记录包含 totalUnit 字段
      */
     @Select({
         "<script>",
-        "SELECT",
-        "  o.id,",
-        "  o.item_name AS itemName,",
-        "  o.price,",
-        "  o.total_unit_id AS totalUnitId,",
-        // 通过字典表获取中文名称，字典表约定：type='unit', id=total_unit_id, name=中文名称
-        "  (SELECT d.name FROM his_dict d WHERE d.type = 'unit' AND d.id = o.total_unit_id) AS totalUnitName,",
-        "  o.quantity,",
-        "  o.frequency,",
-        "  o.route,",
-        "  o.skin_test_status AS skinTestStatus",
-        "FROM his_outpatient_order o",
-        "WHERE o.doctor_id = #{doctorId}",
+        "SELECT o.id,",
+        "       o.patient_id        AS patientId,",
+        "       o.doctor_id         AS doctorId,",
+        "       o.item_code         AS itemCode,",
+        "       o.item_name         AS itemName,",
+        "       o.quantity,",
+        "       o.dosage,",
+        "       o.frequency,",
+        "       o.route,",
+        "       o.start_date        AS startDate,",
+        "       o.end_date          AS endDate,",
+        "       /* 从诊疗目录获取配置的总量单位 */",
+        "       tc.total_unit       AS totalUnit",
+        "FROM outpatient_order o",
+        "LEFT JOIN treatment_catalog tc ON o.item_code = tc.item_code",
+        "WHERE o.patient_id = #{patientId}",
         "</script>"
     })
-    List<OrderDTO> selectOrderListByDoctor(@Param("doctorId") Long doctorId);
+    List<Map<String, Object>> listOrdersByPatient(@Param("patientId") Long patientId);
 
-    // 其它已有方法保持不变 ...
+    // 其它已有的 SQL 方法保持不变
 }