diff --git a/api/lab/save_tomas_config.php b/api/lab/save_tomas_config.php
index 22416a3..06fb5cc 100644
--- a/api/lab/save_tomas_config.php
+++ b/api/lab/save_tomas_config.php
@@ -106,6 +106,13 @@ if ($action === 'add_exam') {
             'tipo'  => 'numero',
             'label' => 'Resultado',
         ];
+        $esquema[] = [
+            'id'          => $prefix . 'o' . $idx . $uid,
+            'tipo'        => 'texto',
+            'label'       => 'Observaciones',
+            'placeholder' => '',
+            'required'    => false,
+        ];
         $esquema[] = [
             'id'    => $firmaId,
             'tipo'  => 'firma_profesional',
diff --git a/ver_formulario_enviado.php b/ver_formulario_enviado.php
index 7422ab5..aec04d1 100644
--- a/ver_formulario_enviado.php
+++ b/ver_formulario_enviado.php
@@ -1546,8 +1546,9 @@ function aewSave(cid) {
         var pre = sessionStorage.getItem('_aew_preselect');
         if (!pre) return;
         sessionStorage.removeItem('_aew_preselect');
-        var radio = document.querySelector('input[type="radio"][value="' + pre.replace(/"/g, '\\"') + '"]');
-        if (radio) { radio.checked = true; radio.dispatchEvent(new Event('change', {bubbles:true})); }
+        _mpSetExamChecked(pre);
+        var el = document.querySelector('[name="_c8j2g16"]:checked,[name="_c8j2g16[]"]:checked');
+        if (el) el.dispatchEvent(new Event('change', {bubbles:true}));
     } catch(e) {}
 })();