Asepsis Related terms l Normal resident flora bacteria

Asepsis

Related terms l Normal resident flora (bacteria) the collective vegetation in a given area, yet produce infection in another. l Infection : invasion and proliferation of microorganisms in certain body tissues. l Disease : a detectable alteration in normal tissue function

Related terms l Virulence (Pathogenicity): the ability of microorganism to produce disease. l Opportunistic pathogen l CDC (Centre for Disease Control)

Asepsis l The freedom from disease-causing microorganisms l Medical asepsis all practices used to limit the number of microorganisms, growth and transmission. - Clean objects: absence of almost all microorganisms. - Dirty (Soiled, Contaminated) : have microorganisms, some of which capable of causing infection. l Surgical asepsis (Sterile Technique): practices that keep area or object free from all microorganisms (sterilization by using autoclave). l Sepsis : the state of infection, may includes septic shock.

Microorganisms causing infections l Bacteria (Staphs, Streptococci) l Viruses (Hepatitis, Herpes. . ) l Fungi (Candida albicans) l Parasites (Malaria) (mites, flees, ticks).

Types of infections l Colonization : microorganisms l results in systemic infection. become resident flora, they may grow and multiply, but do not cause disease. l l Septicemia : when bacteremia Acute infection : sudden and in short time. Local Infection : infection limited to specific area of the body. l l Systemic Infection : spread to different parts of the body. l Bacteremia : Blood culture reveals microorganisms Chronic infection : slow and in very long period.

Nosocomial Infections associated with delivery of health care services in a health care facility (during stay or after discharge) l Examples : UTI’S, URTI’S, Surgical site infection, Blood stream infections. l It may originates as Endogenous or Exogenous. l Iatrogenic (IV insertion) (Dx. or Rx. ).

Chain of Infection Susceptible Host Microorganism Etiologic agent Portal of Entry to susceptible host Reservoir Method of Transmission Portal of Exit from reservoir

Example on Chain of Infection Hepatitis B Virus Susceptible Host Human being HBV Portal of Entry to susceptible host Blood, secretions Method of Transmission Blood, Sexual intercourse Reservoir CARRIERS Portal of Exit from reservoir Open wound, needle, mucous memebrane

Method of transmission 2. Direct transmission : droplet, touch, bite, sexual intercourse. Indirect transmission: - Vehicle-borne (handkerchiefs, toys, soiled clothes) - Vector-borne (animals, flies) 3. Airborne transmission (Tuberculosis) (droplet nuclei). 1.

Body Defense against infection (Susceptible Host) l Nonspecific Defenses : - anatomic & Physiologic Barriers - inflammatory response : vascular and cellular response, exudates production, reparative phase l Specific Defenses : - antibody-mediated (active & passive immunity) - cell-mediated (HIV)

FACTORS INFLUENCE SUSCEPTIBILITY OF THE HOST l l l Age Heredity Stressors Nutritional status Medical therapy

Nursing Diagnoses l l l l Risk for infection Potential complication of infection: fever Impaired physical mobility Imbalanced nutrition: less than body requirements Acute pain Impaired social interaction or social isolation Situational low self-esteem Anxiety

Nursing interventions in infection control and prevention of NCI’S. 1. • • • Hand washing: - before and after eating - after using toilets, bedpan - contact with body substance (sputum, drainage, wound exudates). use: antimicrobial foam, hand gel, water (10 min. ) with soap, antimicrobial liquid soap. When using antimicrobial agent: - multiple resistant bacteria - invasive procedures - SCBU, ICU’S - immune-compromised patients. Frequent use may induce: dryness, contact dermatitis → lotions, moisturisers

Nursing interventions in infection control and prevention of NCI’S. (Hand washing)…. . Nails should be kept short l Remove jewelry l Skin breaks l

Nursing interventions in infection control and prevention of NCI’S. 2. Supporting defense: - Hygiene (bathing and shampooing) - Nutrition (well-balanced diet) to maintain healthy tissues. - Rest and sleep - Immunization

Nursing interventions in infection control and prevention of NCI’S. 3. Cleaning objects - use gloves - rinse with cold water - wash with hot water and soap - use brushes in cleaning - dry up equipments - clean used utensils by disinfectant.

Nursing interventions in infection control and prevention of NCI’S. 4. Disinfection - using chemical preparations such as phenol or iodine compounds. - used on inanimate objects as it is toxic to tissues. - more concentrated than antiseptics. - bactericidal (destroy bacteria) and bacteriostatic (prevent growth and reproduction of some bacteria) agents. - concentration, duration, temp, organic materials are important to consider when using disinfectants.

Nursing interventions in infection control and prevention of NCI’S. 5. Sterilization - is the process of destroying all microorganisms, including spores and viruses. - Moist heat: steam+ pressure or free steam (autoclaving: 1517 pound/121 -123˚ c/ 2030 min.

Nursing interventions in infection control and prevention of NCI’S. (sterilization)…. l Gas sterilization Ethylene oxide gas (interferes with metabolism of microorganisms) for sensitive objects and more penetration. l Boiled water 100 ˚ c/ 15 min l Radiation using ionizing and nonionizing radiation (UV rays). It is very expensive.

Nursing interventions in infection control and prevention of NCI’S. 6. Isolation Precautions: measures designed to prevent spread of infections to health personnel, clients and visitors. l Standard precautions: - for all clients in hospital. - blood, body fluids and secretions, broken skin, mucous membranes. - includes: hand washing, wearing clean gloves, wearing mask, eye protection, face shield, wearing a clean nonsterile gown, correct disposals and prevent injuries

Nursing interventions in infection control and prevention of NCI’S. (Isolation l Precautions…. . Transmission-based precautions (airborneprecautions): - private room, negative air pressure, 2 -same infected clients. - respiratory device - NO entry in cases (rubella, measles, chickenpox- varisella) - limited movement of the patient (surgical mask).

Nursing interventions in infection control and prevention of NCI’S. (Isolation l Precautions…. . Droplets precautions - Used in droplet-transmitted D’s (diphtheria-pertussismumps) - private room - mask - limit patient’s movement (surgical mask).

Nursing interventions in infection control and prevention of NCI’S. (Isolation l Precautions…. . Contact precautions - used in serious illnesses and immune-compromised patients (wound infections, MRSA) - private room - wear gloves - wear gown - limit movement

Nursing interventions in infection control and prevention of NCI’S. 7. Personal protective equipments (medical asepsis) - Gloving - Gowns - Eyewear

Nursing interventions in infection control and prevention of NCI’S. l Disposal of soiled equipment and supplies: - Bagging - Linens - lab. Specimens - Dishes - BP equipments - Thermometers - Sharps

Nursing interventions in infection control and prevention of NCI’S. 9. Sterile technique (surgical asepsis) - can be used in OR, LR, and special Dx. Procedures - sterile field: a microorganism- free area - ensure package intact and dry, and check for sterilization expiry. - double packed objects - using forceps, drape, sterile solutions. - wearing sterile gloves by open and closed methods - wearing sterile gown