diff --git a/apps/inm/migrations/0018_mioitem_count_n_b.py b/apps/inm/migrations/0018_mioitem_count_n_b.py
new file mode 100644
index 00000000..4d17881a
--- /dev/null
+++ b/apps/inm/migrations/0018_mioitem_count_n_b.py
@@ -0,0 +1,18 @@
+# Generated by Django 3.2.12 on 2024-04-08 05:52
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('inm', '0017_mioitem_count_n_hs'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='mioitem',
+            name='count_n_b',
+            field=models.PositiveIntegerField(default=0, verbose_name='扁'),
+        ),
+    ]
diff --git a/apps/inm/models.py b/apps/inm/models.py
index f1bf3dee..7c0fe546 100644
--- a/apps/inm/models.py
+++ b/apps/inm/models.py
@@ -131,6 +131,7 @@ class MIOItem(BaseModel):
     count_n_zz = models.PositiveIntegerField('杂质', default=0)
     count_n_ysq = models.PositiveIntegerField('颜色青', default=0)
     count_n_hs = models.PositiveIntegerField('划伤', default=0)
+    count_n_b = models.PositiveIntegerField('扁', default=0)
     count_n_jsqx = models.PositiveIntegerField('结石气线', default=0)  # 废弃字段
     count_n_qt = models.PositiveIntegerField('其他', default=0)
 
diff --git a/apps/inm/serializers.py b/apps/inm/serializers.py
index b8530129..a86fffe5 100644
--- a/apps/inm/serializers.py
+++ b/apps/inm/serializers.py
@@ -250,7 +250,7 @@ class MIOItemTestSerializer(CustomModelSerializer):
     class Meta:
         model = MIOItem
         fields = ['id', 'test_date', 'test_user', 'count_notok', 'count_n_zw', 'count_n_tw',
-                  'count_n_qp', 'count_n_wq', 'count_n_dl', 'count_n_pb', 'count_n_dxt', 'count_n_js', 'count_n_qx', 'count_n_zz', 'count_n_ysq', 'count_n_qt', 'count_n_hs', 'test_note']
+                  'count_n_qp', 'count_n_wq', 'count_n_dl', 'count_n_pb', 'count_n_dxt', 'count_n_js', 'count_n_qx', 'count_n_zz', 'count_n_ysq', 'count_n_qt', 'count_n_hs', 'count_n_b', 'test_note']
         extra_kwargs = {
             'test_date': {'required': True},
             'test_user': {'required': True}