One hundred and sixty-three Rammstedt operations were performed for hypertrophic stenosis of the pylorus at the Babies Hospital between Jan. 1, 1915, and July 1, 1919. In this number are included cases already reported by Holt,1 Downes2 and Kerley,3 together with a number of cases not yet published. Holt made a survey of the whole subject; compared the medical with the surgical treatment, and demonstrated the superiority of the Rammstedt operation over other methods of treatment previously employed in this hospital. Downes, who performed the majority of the operations, described in detail the operative technic. Kerley reports twenty-six cases. These are included in this series. We have grouped all these cases together for the purpose of studying them from the standpoint of prognosis.
One hundred and thirty-one children recovered and thirty-two died, a mortality of 19.63 per cent. It is interesting to note, in connection with many