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According to the Spaulding classification, which of the following is classified as critical?

  1. Needles

  2. Surgical masks

  3. Stethoscopes

  4. X-ray film

The correct answer is: Needles

According to the Spaulding classification system, items categorized as critical are those that come into contact with sterile tissues or the vascular system. Needles fall into this category as they pierce the skin and directly enter sterile tissues, making them critical items that must be sterilized. Surgical masks, stethoscopes, and X-ray film do not penetrate the skin or come into contact with sterile tissues, so they are not classified as critical items according to the Spaulding classification system.