Pyloroplasty is done in combination with truncal vagotomy to prevent the 40% incidence of subsequent functional pyloric outlet obstruction. It is also indicated when recurrent pyloric channel ulcers have created a rigid pyloric stricture secondary to scar tissue. For the latter indication, the Finney or Joboulay are best suited. In emergency situations, the Heineke-Mijulicz is simplest. All are started by Kocherizing the duodenum.