The Keidel vacuum tube was a type of blood collecting device, first manufactured by Hynson, Wescott and Dunning in around 1922.
[2] Essentially, the Keidel vacuum consists of a sealed ampule with or without a culture medium.
The insertion of the needle into the vein crushes the ampule, thus creating a vacuum and forcing blood into the container.
This concept did not become popular until during World War II, when quick and efficient first aid care was necessary in the battle field.
As a result, the vacutainer became the forefront device used for blood collection.