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[Manfred Pflanz (1923-1980), Health Services Researcher: his Early Contribution to the Medical Care Pattern of Appendectomy].

This article is a reminder of an early example of health services research and quality assurance in Germany. The occasion for this was the 50th anniversary of the opening of the Institute of Social Medicine and Epidemiology at Hannover Medical School in 1968. The founding director of the institute, Prof. Dr. med. Manfred Pflanz, a board-certified internist, had gained reputation by publishing on psychosomatic and medico-social issues. In 1971, Sigrid Lichtner, a doctoral student, and Pflanz published a paper on the epidemiology and medical care pattern of appendectomy [1]. In the late 1960s certified appendicitis mortality in the Federal Republic of Germany used to be 3 times higher than in comparable countries. A regional analysis of all appendectomies in Hannover discovered further "odd" findings such as a weekly profile of operations not in line with an acute emergency condition and clear social as well as regional differences in the appendectomy rate. The most probable reason why the mortality from appendicitis was 3 times higher in the Federal Republic than in any other country, the authors conjectured, was that appendectomy was performed 3 times more frequently than elsewhere - questioning the doctrine of early surgical intervention in suspected appendicitis. Since then, management of appendicitis has changed, quality assurance has been implemented, evidence broadened, laparoscopic and non-operative treatment evaluated in RCTs. Appendicitis mortality has continued to decline with an acceleration of the falling trend in the early 1970s. Absolute numbers of deaths are now very low. Numbers of appendectomies are declining. In this respect, health services have become more effective and efficient.