Infection control principles · USMLE Step 1

Which of the following items requires high-level disinfection rather than sterilization?

  1. Surgical scalpel
  2. Endoscope
  3. Cardiac pacemaker
  4. Implantable orthopedic screw
Show answer and explanation

Correct answer: Endoscope

Endoscopes contact mucous membranes but do not enter sterile body cavities. High-level disinfection is recommended for such devices.

Difficulty: Medium Question 18 of 20

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