Learn how infections spread, when to use standard and transmission-based precautions, how to select PPE, and what to do after an occupational exposure.
Use standard precautions for every patient, regardless of diagnosis or known infection status. Treat blood, body fluids, nonintact skin, and mucous membranes as potentially infectious.
Hand hygieneBefore and after patient contact
PPE selectionBased on anticipated exposure
Respiratory hygieneContain coughs and respiratory secretions
Injection safetyUse a new needle and syringe every time
Sharps safetyDispose immediately in an approved container
Environmental cleaningClean and disinfect contaminated surfaces
Common mistake: Waiting for a confirmed diagnosis before using precautions. Standard precautions begin with the first patient interaction.
Lesson 3
Transmission-Based Precautions
Transmission-based precautions are added to standard precautions when a pathogen spreads through contact, droplets, or airborne particles.
ContactGown and gloves; dedicated equipment when possible
DropletSurgical mask for close contact; patient masking during transport
AirborneFit-tested respirator and airborne-infection isolation room
Examples: Contact may be used for uncontrolled drainage or certain gastrointestinal infections. Droplet may be used for influenza. Airborne may be used for measles, varicella, or pulmonary tuberculosis.
Common mistake: Confusing a surgical mask with a respirator. A surgical mask is not a substitute for a fit-tested respirator when airborne precautions are required.
Lesson 4
Personal Protective Equipment
Select PPE based on the task and the exposure you reasonably expect. PPE protects skin, clothing, eyes, nose, and mouth.
GlovesBlood, body fluids, mucous membranes, or nonintact skin
GownPossible contamination of skin or clothing
Mask or respiratorRespiratory protection based on transmission risk
Typical removal principle: Remove the most contaminated items without touching clean skin or clothing; perform hand hygiene immediately afterward.
Real-world scenario: For a procedure likely to splash blood toward your face, gloves alone are not enough. Add a gown, mask, and eye protection or face shield.
Lesson 5
Hand Hygiene
Perform hand hygiene before touching a patient, before a clean procedure, after body-fluid exposure risk, after touching a patient, and after touching the patient environment.
Alcohol-based hand rubPreferred in many routine situations when hands are not visibly soiled
Soap and waterUse when hands are visibly dirty or contaminated
After glove removalGloves do not replace hand hygiene
Nails and jewelryFollow workplace policy and keep hands easy to clean
Common mistake: Using gloves as a substitute for hand hygiene. Hands can become contaminated during glove removal or through tiny defects.
Clinical pearl: Clean your hands before reaching for clean supplies so you do not contaminate them.
Lesson 6
Medical Asepsis, Surgical Asepsis & Reprocessing
Medical asepsis reduces the number and spread of microorganisms. Surgical asepsis keeps an area or object free of all microorganisms.
CleaningRemoves soil and organic material
DisinfectionDestroys many or most pathogens on objects
SterilizationDestroys all microbial life, including spores
Sterile fieldOnly sterile items may touch sterile areas
Important sequence: Items must be cleaned before effective disinfection or sterilization.
Common mistake: Reaching over a sterile field or turning away from it. When sterility is uncertain, consider the item contaminated.
Lesson 7
Bloodborne Pathogens & Sharps Safety
Bloodborne pathogens can spread through needlesticks, cuts from contaminated sharps, and contact with mucous membranes or nonintact skin.
Engineering controlsSafety needles and sharps containers
Work-practice controlsSafe handling and immediate disposal
Never overfillReplace sharps containers before the fill line
Avoid recappingUse approved safety procedures if recapping is unavoidable
Real-world scenario: After giving an injection, activate the safety feature and place the device directly into the sharps container. Do not carry it around the room.
Common mistake: Trying to retrieve an item from a sharps container. Never reach into a sharps container.
Lesson 8
Medical Waste & Exposure Response
Follow facility policy for regulated medical waste, contaminated laundry, specimens, and environmental spills. Occupational exposures require immediate action and prompt reporting.
Needlestick or cutWash promptly with soap and water
Mucous-membrane splashFlush eyes, nose, or mouth with water
Report immediatelyNotify the designated supervisor or exposure contact
Medical evaluationSeek timely assessment and follow-up
Clinical pearl: Do not delay reporting because the source patient appears healthy. Some infections may be unknown or asymptomatic.
Waste reminder: Follow the facility's labeled-container and local disposal rules. Not every item that touched a patient belongs in regulated medical waste.
CLINICAL DECISION CHALLENGE
Choose the safest action
1. A patient is being evaluated for pulmonary tuberculosis. Which additional precaution is expected?
2. Your hands are visibly soiled after patient care. What should you use?
3. You sustain a needlestick. What is the best response?
FINAL CHECKPOINT
Module 3 Assessment
Answer all 10 questions. A score of 80% or higher completes this module and unlocks Module 4.
🛡️
ACHIEVEMENT UNLOCKED
Infection Control & Patient Safety Complete
You completed all eight lessons and passed the final checkpoint. Module 4: Patient Assessment & Vital Signs is now unlocked.
Educational achievement only: Completing this module or earning an achievement does not confer professional certification, licensure, continuing education credit, or an accredited credential. Follow current workplace policies and supervising-clinician instructions.
