static function ConcluiCrlChave(CrlChave $ch)
 {
     TTransaction::open('my_config');
     if ($conn = TTransaction::get()) {
         $sql = "UPDATE laboratorios SET chave_laboratorio=0\r\n                       WHERE id_laboratorio = ?";
         $sth = $conn->prepare($sql);
         $sth->execute(array($ch->getLaboratorioId()));
         $sql = "UPDATE ctrl_chaves SET dt_final_controle=?\r\n                       WHERE laboratorio_id = ?";
         $sth = $conn->prepare($sql);
         $sth->execute(array($ch->getDtFinalControle(), $ch->getLaboratorioId()));
         TTransaction::close();
     } else {
         echo 'Sem conexão com banco!';
     }
 }