The McRae blood-taking needle is a very useful article. It is hard to clean, however, and rusts easily. In an attempt to overcome these slight disadvantages, I devised a modification of it in the form of the adapter here illustrated.1
The adapter is made of a nonrusting material, and its caliber is so large that it is easily cleaned. Any Luer needle of the desired size may be used on it, and the suction end takes a Luer observation tube or rubber tubing without the interposition of the observation tube.
Lane JE. A MODIFICATION OF THE McRAE NEEDLE. JAMA. 1925;85(1):35. doi:10.1001/jama.1925.26710010001013
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