diff --git a/lib/api_web/controllers/redirect.ex b/lib/api_web/controllers/redirect.ex
index 2d19296..014c883 100644
--- a/lib/api_web/controllers/redirect.ex
+++ b/lib/api_web/controllers/redirect.ex
@@ -12,6 +12,13 @@ defmodule ApiWeb.Redirect do
     viewer_uid = Envar.get("imViewer4_uid")
     gethash = Envar.get("imViewer4_gethash")
     idsite = Envar.get("IDSITE")
+    studyidentifier_ed = Envar.get("acceso_ed")
+
+    accession = studyidentifier = if studyidentifier_ed == "IDSTUDY" do
+      String.to_integer(accession)
+    else
+      accession
+    end
 
     Logger.info("parametros: #{inspect(accession)}")