Heaf test

The Heaf test, also known as the Sterneedle test, was a diagnostic skin test used to determine whether children had been exposed to tuberculosis infection. Named after F. R. G. Heaf, it was administered with a spring-loaded instrument called a Heaf gun that had six needles arranged in a circular formation. The test was discontinued in 2005 because the manufacturer deemed its production financially unsustainable after manufacturers could not be found for tuberculin or Heaf guns.