When the Nobel Prize in Physiology and Medicine was awarded to Andre Cournand and Werner Forssmann in 1956 for developing cardiac catheterization, the Nobel Committee was not aware about the pioneering work of Dr Otto Klein. However, W. Forssmann mentioned him in his Nobel Lecture on 11 December 1956: ‘Nevertheless, in 1930, about 6 months after my first publication, Otto Klein reported from Nonnrenbruch’s Prague clinic on a series of patients whose heart minute-volumes he had ascertained according to Fick’s principle, by means of the heart catheter. This procedure has its place even today in the standard practice of heart and lung clinics’ (https://www.nobelprize.org/prizes/medicine/1956/forssmann/lecture/).

中文翻译：

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布拉格大学医院的奥托·克莱因（Otto Klein）在1929年对11名捷克患者进行了世界首次诊断性心脏导管检查

1956年因开发心脏导管术而将诺贝尔生理学和医学奖授予安德烈·库尔南德和沃纳·福斯曼时，诺贝尔委员会并不知道奥托·克莱因博士的开创性工作。然而，弗·福斯曼（W. Forssmann）在1956年12月11日的诺贝尔奖演讲中提到了他：“尽管如此，在1930年，即我第一次发表刊物约6个月后，奥托·克莱因（Otto Klein）从Nonnrenbruch的布拉格诊所报道了一系列他确定的心脏分钟容积的患者根据菲克原理，通过心脏导管。直到今天，该程序在心脏和肺部诊所的标准实践中也占有一席之地（https://www.nobelprize.org/prizes/medicine/1956/forssmann/lecture/）。