🛠️ Invention or technique

Blood groups and compatible transfusion

Grupos sanguíneos y transfusión compatible

Date
1901–1907 · confidence high
Place
Vienna, Austria
Credited to
Karl Landsteiner (groups A, B, O, 1901); Reuben Ottenberg (first transfusion with cross-matching, New York, 1907)
People
👤 Karl Landsteiner1868–1943👤 Reuben Ottenberg1882–1959
Field
Life & health

What it is

Discovery that human blood divides into groups incompatible with one another. It turned transfusion from a fatal gamble into a safe procedure.

Jan Janský (Prague, 1907) independently described four groups.

What it led to

  • Viable major surgery and trauma care
  • Blood banks and military medicine
  • Paternity testing and human genetics
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