lumen

Medical term Routine Blood Collections

The hollow channel inside a needle or vessel. Needle gauge describes the size of the needle's lumen.

Sources

• Heinemann L, et al. Needle Technology for Insulin Administration: A Century of Innovation. J Diabetes Sci Technol 2023;17(2):449-457 (PMC10012366) · PubMed Central (NLM)
• WHO Guidelines on Drawing Blood: Best Practices in Phlebotomy (2010); official WHO IRIS PDF, also published as NCBI Bookshelf NBK138650 · World Health Organization

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Study Routine Blood Collections

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• Venous Order of Draw, Additives and Inversions
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• Medical Word Parts for Phlebotomy