diff --git a/app/routes/debug_fb.py b/app/routes/debug_fb.py
index 363df62..0ce325f 100644
--- a/app/routes/debug_fb.py
+++ b/app/routes/debug_fb.py
@@ -32,27 +32,28 @@ async def find_cups(request: Request, user: dict = Depends(get_current_user)):
     """)
     results["campos_cup_en_bd"] = rows0 if ok0 else []
 
-    # 1. Columnas de ARTICULO
+    # 1. Columnas de ITEM
     ok1, err1, rows1 = fb.execute_query("""
         SELECT TRIM(f.RDB$FIELD_NAME) AS campo
         FROM RDB$RELATION_FIELDS f
-        WHERE TRIM(f.RDB$RELATION_NAME) = 'ARTICULO'
+        WHERE TRIM(f.RDB$RELATION_NAME) = 'ITEM'
         ORDER BY f.RDB$FIELD_POSITION
     """)
-    results["columnas_articulo"] = [r["campo"] for r in rows1] if ok1 else f"error: {err1}"
+    results["columnas_item"] = [r["campo"] for r in rows1] if ok1 else f"error: {err1}"
 
-    # 2. Primer examen de RELACION y sus datos en ARTICULO
-    ok2, _, rows2 = fb.execute_query(
-        "SELECT FIRST 1 rel.COD_EXAMEN FROM RELACION rel WHERE rel.COD_EXAMEN IS NOT NULL"
+    # 2. Muestra de ITEM para el examen CH4
+    ok3, err3, rows3 = fb.execute_query(
+        "SELECT FIRST 1 i.* FROM ITEM i WHERE TRIM(i.CODIGO) = :cod",
+        {"cod": "CH4"}
     )
-    if ok2 and rows2:
-        cod = rows2[0]["COD_EXAMEN"]
-        results["cod_examen_ejemplo"] = cod
-        ok3, err3, rows3 = fb.execute_query(
-            "SELECT FIRST 1 a.* FROM ARTICULO a WHERE TRIM(a.CODIGO) = :cod",
-            {"cod": str(cod).strip()}
+    if ok3 and rows3:
+        results["item_ch4_por_codigo"] = rows3[0]
+    else:
+        # Intentar con otro campo
+        ok3b, err3b, rows3b = fb.execute_query(
+            "SELECT FIRST 3 i.* FROM ITEM i WHERE i.CUPS_DETALLE IS NOT NULL AND TRIM(i.CUPS_DETALLE) <> ''"
         )
-        results["articulo_ejemplo"] = rows3[0] if (ok3 and rows3) else f"error: {err3}"
+        results["item_muestra_con_cups"] = rows3b if ok3b else f"error: {err3b}"
 
     # 3. Descuentos en RELACION
     ok4, _, rows4 = fb.execute_query("""