4.1: Standard Precautions & Hand Hygiene

Standard Precautions & Hand Hygiene

Introduction to Oregon Regulatory Infection Control

In Oregon, the Oregon State Board of Nursing (OSBN) and the Oregon Health Authority (OHA) mandate strict compliance with infection control protocols in all licensed healthcare facilities. Certified Nursing Assistants (CNAs) work on the front lines of patient care and are the primary defense against the spread of healthcare-associated infections (HAIs). Hand hygiene is not only a clinical necessity but also a core focus of the Oregon TMU/Headmaster skills exam. On the practical test, proper hand hygiene is classified as a first-priority, key clinical skill. Failing to perform hand hygiene correctly, or omitting it during critical transitions of care, results in an automatic failure of the skills portion of the certification exam. Understanding the science of infection transmission and the mechanics of handwashing is essential to passing the exam and protecting vulnerable residents.

The Chain of Infection

To prevent the spread of diseases, a CNA must understand how infections occur. The process is described using the "Chain of Infection," which consists of six linked components. If any link in this chain is broken, the spread of infection is stopped:

1. Infectious Agent: This is the pathogen that causes the disease, such as bacteria, viruses, fungi, or parasites. Common pathogens in long-term care include Clostridium difficile (C. diff), Influenza, and Norovirus.
2. Reservoir: This is the place where the pathogen lives, grows, and multiplies. Reservoirs can be the human body, animals, food, water, or contaminated surfaces (fomites) like bedside tables, door handles, and bed rails.
3. Portal of Exit: This is the pathway by which the pathogen leaves the reservoir. In humans, this includes respiratory droplets (from coughing or sneezing), saliva, blood, semen, vaginal secretions, urine, feces, and wound drainage.
4. Mode of Transmission: This is how the pathogen travels from the reservoir to a new host. It can occur via direct contact (touching an infected resident), indirect contact (touching a contaminated surface), droplet transmission (inhaling respiratory secretions from someone nearby), or airborne transmission (breathing in tiny pathogens suspended in the air).
5. Portal of Entry: This is the opening through which the pathogen enters the new host's body. Common portals of entry include the mouth, nose, eyes, urinary tract (especially in residents with indwelling catheters), respiratory tract, and non-intact skin (cuts, scrapes, or pressure injuries).
6. Susceptible Host: This is the uninfected person who becomes ill. Long-term care residents are highly susceptible hosts due to advanced age, weakened immune systems, chronic diseases (such as diabetes or cardiovascular disease), poor nutrition, and invasive medical devices.

Standard Precautions

Standard Precautions are the foundation of infection prevention. They are based on the principle that all blood, body fluids, secretions, excretions (except sweat), non-intact skin, and mucous membranes may contain transmissible infectious agents. Under OSBN and federal guidelines, Standard Precautions must be applied to the care of ALL residents in ALL healthcare settings, regardless of their diagnosed infection status.

A key concept in Standard Precautions is distinguishing between "clean" and "dirty" (contaminated). "Clean" refers to objects or areas that have not been contaminated with pathogens, or those that have undergone sanitization to reduce the number of micro-organisms. "Dirty" refers to any object or area that is soiled with blood, body fluids, or has been in contact with pathogens. When performing care, a CNA must always work from "clean to dirty" to prevent cross-contamination. For example, during perineal care, the CNA must wipe from the clean area (anterior) to the dirty area (posterior) to prevent introducing fecal bacteria into the urinary tract.

Bloodborne Pathogens and Exposure Control

Bloodborne pathogens are infectious micro-organisms present in human blood that can cause disease in humans. The three most common and dangerous bloodborne pathogens in healthcare are Human Immunodeficiency Virus (HIV), Hepatitis B Virus (HBV), and Hepatitis C Virus (HCV).

Under the Occupational Safety and Health Administration (OSHA) and Oregon OSHA (OR-OSHA) regulations, all healthcare facilities must maintain an Exposure Control Plan. CNAs must receive annual training on bloodborne pathogens and know how to protect themselves. This includes using appropriate personal protective equipment (PPE) when handling blood or body fluids, utilizing needle-safe devices, and disposing of sharps immediately in designated, puncture-resistant containers. If a CNA experiences an accidental needle-stick or a splash of body fluids to the eyes, nose, or mouth, they must wash the affected area immediately with soap and water (or flush eyes with water) and report the exposure to the charge nurse immediately. Prompt reporting is required for post-exposure prophylaxis (PEP) to be effective.

Hand Hygiene: Soap and Water vs. Alcohol-Based Hand Rub

Hand hygiene is the single most effective way to prevent the spread of infection. It includes both washing hands with soap and water and using alcohol-based hand rubs.

• Soap and Water: Must be used when hands are visibly soiled with blood, body fluids, or dirt. It is also mandatory before eating, after using the restroom, and when caring for a resident with a known or suspected spore-forming infection, such as Clostridium difficile (C. diff) or Norovirus. Alcohol-based hand rubs are ineffective against spores because they do not destroy them; the physical friction and rinsing action of soap and water are required to mechanically wash the spores off the skin.
• Alcohol-Based Hand Rub: Can be used for routine hand hygiene when hands are not visibly soiled. This includes before and after direct contact with a resident, before handling clean linens or food, after touching resident surroundings (bed rails, tables), and after removing gloves. The hand rub must contain at least 60% alcohol, and it must be rubbed over all surfaces of the hands until they are completely dry.

Headmaster Oregon Skills Exam Handwashing Requirements

In the Oregon TMU/Headmaster CNA skills exam, handwashing is evaluated with strict criteria. To pass, the candidate must perform the following steps:

1. Turn on the water and adjust the temperature to warm.
2. Wet hands and wrists thoroughly under running water, keeping the hands and forearms lower than the elbows throughout the entire procedure to prevent dirty water from running up the arms.
3. Apply soap to hands.
4. Lather all surfaces of the hands, including the palms, backs of hands, between the fingers, around the cuticles, the wrists, and under the fingernails.
5. Rub hands together with friction for at least 20 seconds. This is a critical step; rubbing for less than 20 seconds results in an automatic failure of the handwashing skill.
6. Clean fingernails by rubbing them against the palms of the opposite hand.
7. Rinse hands and wrists thoroughly under running water, ensuring hands remain lower than the elbows and that you do not touch the inside of the sink.
8. Dry hands and wrists completely with clean paper towels, starting from the fingertips (cleanest) and moving upward to the wrists (dirtier).
9. Dispose of the paper towels in the waste basket without touching the basket.
10. Use a new, clean, dry paper towel to turn off the water faucet. Do not touch the clean faucet with bare hands, as this instantly re-contaminates them. Discard the paper towel.