diff --git a/liswork/src/main/resources/mapper/LisWorkGermMapper.xml b/liswork/src/main/resources/mapper/LisWorkGermMapper.xml
index df0f601..66457d1 100644
--- a/liswork/src/main/resources/mapper/LisWorkGermMapper.xml
+++ b/liswork/src/main/resources/mapper/LisWorkGermMapper.xml
@@ -9,8 +9,8 @@
     <select id="getLabResultMedInfo" resultType="com.czlis.common.core.domain.entity.lis.LabResultMed">
         select a.*,
             case
-            when isnull(a.mic)!='' then isnull(c.micref,d.micref)
-            when isnull(a.rad)!='' then isnull(c.radref,d.radref)
+            when isnull(a.mic,'')!='' then isnull(c.micref,d.micref)
+            when isnull(a.rad,'')!='' then isnull(c.radref,d.radref)
             else '' end as ckz,e.bz as cp_bz from lab_resultmed a
                  join xm_info b on b.yq=a.yq and b.xmdh=a.xmdh
                  left join com_dict e on e.zdlb='germclass' and e.zddh=b.germclass