The principles of Infection Prevention and Control — City and Guilds of London Institute Vocationally-Related Qualification Nursing & Healthcare Revision
This element instils the core principles of infection prevention and control essential for safe decontamination of medical devices. Learners examine the le
Topic Synopsis
This element instils the core principles of infection prevention and control essential for safe decontamination of medical devices. Learners examine the legal, policy and procedural frameworks that underpin practice, with emphasis on risk assessment, correct selection and use of PPE, and meticulous personal hygiene. Mastery of these principles ensures decontamination personnel protect patients, themselves, and the environment from healthcare-associated infections.
Key Concepts & Core Principles
- The decontamination cycle: cleaning, disinfection, sterilization, and storage – each stage must be validated and documented to ensure efficacy.
- Microbiology basics: understanding pathogens (bacteria, viruses, prions) and how they are inactivated by different decontamination methods.
- Sterilization methods: steam sterilization (autoclaving) at 134°C for 3 minutes or 121°C for 15 minutes; low-temperature methods like ethylene oxide for heat-sensitive devices.
- Validation and quality assurance: using biological indicators (e.g., Geobacillus stearothermophilus spores), chemical indicators, and process challenge devices to confirm sterilization.
- HTM 01-01 and HTM 01-05: UK Department of Health guidelines for decontamination in primary care and acute settings, including requirements for washer-disinfectors and storage.
Exam Tips & Revision Strategies
- When citing policies, always name the specific document and explain how its content applies to a given decontamination scenario.
- Link every infection control action to a step in the risk assessment process to demonstrate systematic thinking.
- Use scenarios to illustrate your answers, showing how you would adapt precautions to different levels of contamination risk (e.g., low-risk vs. high-risk devices).
- Memorise the key principles of the hierarchy of controls and describe how they are applied in a decontamination unit to minimise infection risk.
Common Misconceptions & Mistakes to Avoid
- Confusing standard infection control precautions with transmission-based precautions, leading to inappropriate PPE selection.
- Believing that wearing PPE eliminates the need for hand hygiene between tasks or glove changes.
- Overlooking the importance of environmental decontamination and equipment cleaning in breaking the chain of infection.
- Failing to differentiate between legislation, policies, and guidance, resulting in vague or legally incorrect statements.
Examiner Marking Points
- Award credit for accurately explaining the chain of infection and identifying how decontamination breaks each link.
- Expect demonstration of how to interpret a risk assessment to select appropriate infection control measures, including PPE type and level.
- Require explicit reference to current legislation and guidance (e.g., Health and Social Care Act 2008, HTM 01-05) when justifying procedures.
- Look for evidence of correct hand hygiene technique and an understanding of the WHO’s 5 Moments for Hand Hygiene in the context of decontamination.