Questions
2 questions per theory paper
Difficulty
Medium
Importance
High yield for B.Sc Nursing and MBBS practical/theory exams
Overview
Infection control and hand hygiene form the cornerstone of clinical practice and patient safety by breaking the chain of infection. For university examinations, aspirants must master the Standard Precautions and specific hand hygiene protocols to demonstrate both theoretical knowledge and safe clinical competence.
Principles of Hand Hygiene
Hand hygiene is the most effective measure to prevent healthcare-associated infections (HAIs). It involves either handwashing with soap and water or using alcohol-based hand rubs based on the visible soilage of the hands.
- WHO 'My 5 Moments for Hand Hygiene'
- Duration for soap and water: 40-60 seconds
- Duration for alcohol-based rub: 20-30 seconds
- Mechanically removes transient flora
- Crucial before and after patient contact
Standard Precautions
Standard precautions are the minimum infection prevention practices that apply to all patient care, regardless of suspected or confirmed infection status. They are designed to reduce the risk of transmission of microorganisms from both recognized and unrecognized sources.
- Hand hygiene compliance
- Use of Personal Protective Equipment (PPE)
- Respiratory hygiene and cough etiquette
- Safe injection practices
- Environmental cleaning and disinfection
- Proper sharps management
Transmission-Based Precautions
These precautions are utilized in addition to standard precautions for patients with documented or suspected infections that are highly transmissible. They are categorized based on the primary route of disease transmission.
- Contact precautions: gown and gloves (e.g., MRSA, VRE)
- Droplet precautions: surgical mask (e.g., Influenza, Pertussis)
- Airborne precautions: N95 respirator and negative pressure room (e.g., TB, Measles)
- Required for patients with multidrug-resistant organisms
Formula Sheet
Chain of Infection: Infectious Agent -> Reservoir -> Portal of Exit -> Mode of Transmission -> Portal of Entry -> Susceptible Host
Exam Tip
Always draw the 'Chain of Infection' diagram in your answer to visualize how interventions like hand hygiene break the link between the reservoir and the susceptible host.
Common Mistakes
- Confusing the sequence of putting on and taking off PPE (donning and doffing).
- Failing to mention the specific '5 moments' defined by the WHO in long-answer questions.
- Neglecting to distinguish between antiseptic handwashing and routine handwashing.
More Revision Notes
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