The "6 needle jab" refers to the Heaf Test, a method used to test for tuberculosis exposure or immunity.
Understanding the Heaf Test
The Heaf Test involves using a specialized injector that punctures the skin with six needles simultaneously. This process delivers tuberculin, a substance derived from tuberculosis bacteria, into the skin. This allows medical professionals to observe if the individual has any reaction to it, indicating a previous exposure or immunity to tuberculosis.
Key Features of the Heaf Test:
- Method: Involves the use of an injector with six needles.
- Purpose: To introduce tuberculin into the skin.
- Detection: The skin reaction is observed for signs of redness or induration.
- Historical Context: Named after British physician Frederick Heaf.
The Procedure
- A small amount of tuberculin is placed into the injector.
- The injector is pressed against the skin.
- Six needles puncture the skin, administering the tuberculin.
- The site is monitored for a reaction.
Why use six needles?
The six needles ensure the tuberculin is delivered consistently under the skin at multiple points, allowing a more reliable assessment of skin reaction than a single injection site. This uniformity in application is essential for accurate test results.
| Feature | Description |
|---|---|
| Test Name | Heaf Test |
| Method | Six needles puncture skin |
| Substance | Tuberculin |
| Purpose | Detect tuberculosis exposure/immunity |
| Origin | Named after British physician Frederick Heaf |
The use of this particular method was common in the 1980-1990 era and is documented by the Science Museum Group. The Heaf Test is a crucial diagnostic tool that assists in identifying individuals who may need further medical attention or treatment.
