Keidel vacuum

The Keidel vacuum tube was a type of blood collecting device, first manufactured by Hynson, Wescott and Dunning in around 1922.[1] This vacuum was one of the first evacuated systems, predating the more well known Vacutainer.[1] Its primary use was to test for syphilis and typhoid fever.[2]

How it worked

Essentially, the Keidel vacuum consists of a sealed ampule with or without a culture medium. Connected to the ampule was a short rubber tube with a needle at the end, using a small glass tube as a cap. The insertion of the needle into the vein crushes the ampule, thus creating a vacuum and forcing blood into the container. Typically, a prominent vein in the forearm such as the median cubital vein would suffice, although the Keidel vacuum can take blood for any prominent peripheral vein. 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.[1]

gollark: So, what this is doing is... initializing stuff for a `write` syscall, then... doing... some kind of stack operation on `rsi`, which also happens to be one of the params for syscalls, and then initializing `rdx` with 128 so 128 bytes are written, then writing?
gollark: I meant source. As in source code.
gollark: Sauce?
gollark: You made your thing accidentally print out some environment variables?
gollark: Probably it would just have to invoke `curl` or something to download the PotatOS For Linux script, and then execute that.

See also

References
  1. Pendergraph, Garland E. (1998) Handbook of Phlebotomy and Patient Service Techniques 4th ed. Williams & Wilkins. ISBN 0-683-30556-5
  2. Greene, Charles Lyman (1917) Medical Diagnosis for the Student and Practitioner. P Blakiston's & Son
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