He performed a surgery which showed that understanding of surgery was becoming very clear and diagnosis becoming fine. In the past, everything relating to abdominal surgery was vague. Although, there is no clear mentioning by Kriege of how clean the instruments used were it can be seen that all the causes are being discovered.
In conclusion, the move to longer operations increased danger of dangerous complications since the prolonged exposure of surgical wounds to the open air increased chances of infections. It was only in the late 19th century with the rise of microbiology, scientists like Louis Pasteur (1833-1895) and innovative doctors were able to implement the notion of strict cleanliness and need for sterile settings during surgery arise.
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