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Intermediate Technical IVT

critical instrument

Medical devices that enter sterile tissue or vascular systems and require sterilization.

Full Definition

Critical instruments are medical devices that contact sterile tissues or enter the vascular system during use, carrying the highest risk of infection transmission if contaminated. According to the Spaulding classification system, these instruments must be sterilized before use. Examples include surgical instruments, cardiac catheters, implants, and needles. Critical instruments require the most rigorous reprocessing protocols, including thorough cleaning, inspection, packaging, sterilization, and sterile storage. Any breach in sterility requires complete reprocessing.

Usage

Usage note: Part of the Spaulding triad: critical, semi-critical, non-critical. Always lowercase unless beginning sentence.

In Context

  • "All critical instruments must undergo high-level disinfection or sterilization between patient uses." — Reprocessing procedure manual
  • "The surgical forceps are classified as critical instruments requiring steam sterilization." — Instrument classification guide

Also known as

critical device critical item

Contrasted with

non-critical instrument

Don't confuse with

semi-critical instrument high-risk device

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