medical / surgical asepsis and infection control
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Medical / Surgical Asepsis and Infection Control. Sharon L. Kinley-Schwing BSN Pacific College 2006. Foundations of Nursing Christensen Kockrow Mosby Lois White / Thomas. - PowerPoint PPT PresentationTRANSCRIPT
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Medical / Surgical Asepsis and Infection Control
Foundations of NursingChristensen Kockrow Mosby Lois White / Thomas
Sharon L. Kinley-Schwing BSN Pacific College 2006
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Medical/Surgical Asepsis and Infection Control
• Joseph Lister (1827 – 1912) is known as the father of aseptic technique.
• Josephs technique helped reduce morbidity and mortality.
• It is now known that microorganisms cause infection.
• The growth and reproduction of a microorganism must be stopped to prevent an infection.
• Concern and education regarding transmissible infections have increased in both hospitals and homes.
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Infection Control
• Policies and procedures in infection control are included in all health care facilities.
• The education of all staff personnel is to minimize the risk of nosocomial infections.
• Any patient entering a health care facility, due to illness or need for invasive procedure is at risk for developing an infection.
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• The application of infection control principles, and use of common sense help protect the patients.
• Nurses are very often exposed to pathogenic microorganisms and should use specialized and routine practices of cleanliness to prevent the spread of infection.
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Asepsis
• Microorganisms are tiny, microscopic, capable of carrying on living process.
• Microorganism are naturally present in the environment, as well as on the human body.
• Many microorganisms are harmless, unless an individual is ill, and then highly susceptible to infection.
• There are some microorganisms that do cause specific diseases or infections.
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Asepsis
• Medical asepsis, know as clean technique, inhibits the growth and spread of pathogenic microorganisms:
– Hand washing.
– Changing the patients linen daily.
– Daily activities of cleanliness.
– Principles of medical asepsis is common at home.
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• Surgical asepsis, known as sterile technique, destroys all microorganisms and their spores .
– Sterile technique and use in special skills and procedures.
– Care of surgical wounds.
– Urinary catheters.
– Invasive procedures and surgery.
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FLORA
• Microorganisms that occur or have adapted to live in a specific environment.
• Resident flora–always present, usually without altering the client’s health.
• Transient flora–episodic, and do not continually live on the skin.
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PATHOGENICITY AND VIRULENCE
• Pathogens–disease-producing microorganisms.
• Pathogenicity–ability of microorganism to produce disease.
• Virulence–frequency with which a pathogen causes disease.
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FACTORS AFFECTING VIRULENCE
• The strength of the pathogen to adhere to healthy cells.
• The ability of a pathogen to damage cells or interfere with the body’s normal regulating systems.
• The ability of a pathogen to evade the attack of white blood cells.
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Infection Process
• Six elements must be present for infection to occur:
Infectious agent
Reservoir
Exit
Method of transportation
Entrance
Host
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The Chain of Infection
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Infectious Agents
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BACTERIA
• Small, one-celled microorganisms that lack a true nucleus or mechanism to provide metabolism.
• Not all bacteria harmful or cause disease.
• Common bacterial infections: diarrhea, pneumonia, sinusitis, cellulitis, urinary tract infections, meningitis, gonorrhea.
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Bacteria
• Many different characteristics.• Three basic shapes, they include ?• During cell division some bacterial stay together
to form pairs. • These difference help identifying specific kinds
of bacteria.• Aerobic bacteria• Anaerobic bacteria• What is a spore ?
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Bacteria continued
• Many diseases can be diagnosis and treated when the specific microorganism in identified.
• Body fluids, secretion suspected of containing pathogenic organisms can be evaluated for diagnosis.
• Cultures and sensitivity test are completed to determine the antibiotic that will inhibit growth.
• Streptococcus is responsible for more diseases than any other organism. Some strains are fatal.
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Viruses
• Smallest known agents that cause disease.
• Not complete cells, but consist of a protein coat around a nucleic acid core.
• 1898 Beijernick name these small bodies viruses.
• 1941 electron microscope made in possible to study these small agents.
• Enter the body via the respiratory, gastrointestinal, broken skin (vector or injection).
• Most viruses are self limiting illnesses, others are fatal.
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VIRUSES
• Organisms that can live only inside cells.
• They cannot get nourishment or reproduce outside cells.
• Common viral infections: common cold, influenza, measles, chickenpox, hepatitis B, genital herpes, HIV.
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Fungi
• Fungal (mycotic ) infections are among the most common.
• Fungi belong to the plant kingdom, many are harmless, some are responsible for infections.
• The grey, black, green, white fuzzy growth on old bread is a type of fungi.
• Most mycotic infections are caused by yeasts and molds.
• Most commonly involve the skin and mucous membranes.
• Fungi that invade deeper tissue may be come fatal.
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FUNGI
• Grow in single cells or in colonies.
• Food from dead organic matter, living organisms.
• Most are not pathogenic.
• Fungi can cause infections of the hair, skin, nails, and mucous membranes.
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Protozoa
• Single celled animals existing every where in nature in some form.
• Some of the parasitic forms are found in the intestinal, genitourinary, respiratory and circulatory systems.
• Disease producing protozoa are responsible for malaria, amebic dysentery, and African sleeping sickness.
• Pathogenic microorganisms are infectious agents.
• These microorganisms require food, and a proper environment in which to grow and live.
• The strength of the organism, depends on the number present and the patients immune system.
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PROTOZOA
• Single-celled parasitic organisms with ability to move.
• Food from dead, decaying organic matter.
• Infection is spread through contaminated food, water, or insect bites.
• Common infections: malaria, gastroenteritis, vaginal infections.
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RICKETTSIA
• Intracellular parasites that
need to be in living cells to reproduce.
• Spread through fleas, ticks, mites, and lice.
• Common rickettsia infections include typhus, Rocky Mountain spotted fever, and Lyme disease.
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COLONIZATION AND INFECTION
• Colonization–the multiplication of microorganisms on or within a host without resulting in cellular injury.
• Infection–the invasion and multiplication of pathogenic microorganisms in body tissue that result in cellular injury.
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AGENT
Entity that can cause disease:
• Biological agents: living organisms that invade the host, causing disease
• Chemical agents: substances that can interact with body, causing disease.
• Physical agents: factors in environment capable of causing disease.
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RESERVOIR
Place where agent can survive:
• In humans, animals, environment.
• Fomites–objects contaminated with infectious agent.
• Carriers–have infectious agent but symptom free.
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Reservoir continue
• Any natural habitat of a microorganism that promotes growth and reproduction is a reservoir.
• Many microorganisms are found in many areas of the body, but the presents doesn’t always mean infection.
• Examples of Reservoirs: Soiled dressings Wet dressings Bed linens/ Gowns/Uniforms Hospital equipment Urinary drainage bags/ Urinals Carrier or vector is a person or animal that harbors and
spreads an organism causing disease, with out becoming ill them self.
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Exit Route
• Microorganism cannot spread without first finding a way out of the first host.
• Human exit routes include: gastrointestinal respiratory genitourinary blood tissue
• Handwashing prevent the spread of microorganisms or cross contamination.
• Coving the nose and mouth when coughing also prevents the spread of dieses causing organisms.
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PORTAL OF EXIT
How infectious agent leaves the reservoir:
• Sputum.
• Semen, vaginal secretions, and urine.
• Saliva and feces.
• Blood.
• Draining wounds.
• Tears.
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Method of Transmission
• Once a microorganism has exited a reservoir there are many vehicles.
• These vehicles are called contaminated, soiled or stained.
• What is a fomite ?
• What is a vector ?
Give examples of each..
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MODES OF TRANSMISSION
Movement of infectious agent from reservoir or source through portal of exit to portal of entry of susceptible host:
• Contact transmission.
• Airborne transmission.
• Vehicle transmission.
• Vector-borne transmission.
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PORTAL OF ENTRY
How an infectious agent enters the host:
• Integumentary system.
• Respiratory tract.
• Genitourinary tract.
• Gastrointestinal tract.
• Circulatory system.
• Transplacental.
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Entrance of Microorganisms
• Once an organism has exited one host and been transmitted, it must find a way to enter a susceptible host.
• When a host’s defense mechanisms are reduced, there is a greater chance of the organism to enter.
• What are some of the ways organism can enter a host?
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Host
• A host is an organism in which another , usually parasitic, organism is nourished and harbored.
• Susceptibilities are determined by the amount to resistance shown to the pathogen.
• Microorganisms are constantly in contact with people, but infections do not develop unless a person is susceptible to the numbers of organisms.
• Immunizations have proven effective in providing additional protection against infectious disease.
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HOST
• Organism that can be affected by agent.
• Susceptible host–person who has no resistance to an agent and thus is vulnerable to disease.
• Compromised host–person whose normal body defenses are impaired and is therefore susceptible to infection.
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FACTORS AFFECTING SUSCEPTIBILITY TO INFECTION
• Age
• Concurrent diseases
• Stress
• Immunization/vaccination status
• Lifestyle and occupation
• Nutritional status
• Heredity
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• Infectious process:
incubation period
prodromal stage
illness stage
convalescence
• Inflammatory response:
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STAGES OF INFECTION
• Incubation stage–the time between entry of an infectious agent and the onset of symptoms.
• Prodromal stage–the time from the onset of nonspecific symptoms until specific symptoms begin to manifest.
• Illness stage–the time when client has specific signs and symptoms.
• Convalescent stage–from the beginning of the disappearance of acute symptoms until client returns to previous state of health.
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Nosocomial Infections
• Term taken from the Greek word, meaning health care facility.
• An infection that is acquired while in a hospital or other health care agency.
• This infection is usually acquired at least 12 hour after admission.
• The hospital harbors microorganisms that may be highly virulent.
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NOSOCOMIAL INFECTIONS continued
• Infection acquired in hospital or other health care facility that was not present at the time of the client’s admission.
• Include those infections that become symptomatic after the client is discharged.
• Four categories: urinary tract, surgical wounds, pneumonia, and septicemia.
• These infections cause extended stays and treatment for patient, and increase cost of care for the hospital.
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Infection Control Team
• Valuable discipline in the health care arena. • These teams include who ?
• OSHA and JAHO have pressured hospitals to better organize these teams, and document infections within the hospital.
• What is the duty of infection control personnel ?
• Employee health services.
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BREAKING THE CHAIN OF INFECTION
Page 359
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Standard Precautions • Set of guidelines designed to reduce the link of transmission of
blood born pathogens and pathogens from moist body secretions.
• Guidelines apply to:– Blood– All body fluids, secretions and excretions– Nonintact skin– Mucous membrane
– Precautions promote:– Handwashing– Use of gloves, masks, eye protection– Use of gowns when appropriate for patient contact
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Hand Hygiene
• The most important and basic preventive technique for interruption the infectious process.
• 2 minute handwashing will provide protection before the nurse cares for a patient.
• 30 second handwashing before caring for another patient should be sufficient to ensure minimal transmission of microorganism between patients.
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MEDICAL ASEPSIS
• Hand hygiene–the most basic and effective infection-control measure to prevent and control the transmission of infectious agents.
• Single most important procedure for preventing nosocomial infections.
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• Performing a 2 minute hand wash.
• Using an Alcohol-Based Waterless Antiseptic for Routine Hand Hygiene.
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Performing a 2-minute
handwashing
(From Elkin, M.K., Perry, A.G., Potter, P.A. [2004]. Nursing interventions
and clinical skills. [3rd ed.]. St. Louis: Mosby.)
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Health Promotion Considerations
• Adequate exercise, well balanced diet, current immunizations.
• Discuss susceptibility of the patient to disease.
• Teach correct and safe methods of storing and preparing foods.
• Hygiene.
• Know family and others susceptibilities to disease.
• Home cleaning techniques for patients cared for at home.
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Gloving
• Gloves are use if there is nay possibility of contact with infectious material.
• Advice from the CDC on wearing gloves include ?
• Donning gloves / Removing gloves
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• Gowning gowning for isolation
• Mask / Protective eyewear donning a mask
• Disposing of Contaminated Equipment
• Double bagging
• Isolation technique
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Donning a mask.
(From Potter, P.A., Perry, A.G. [2005]. Fundamentals of nursing. [6th ed.]. St. Louis: Mosby.)
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Double bagging.
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Types of PrecautionsPatients Requiring Precaution
• Standard precautions
• Airborne precautions
• Droplet precautions
• Tuberculosis isolation
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Types of Precautions continued
• Contact Precautions
• Immunocompromised patients
• Monitoring of isolation
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ASEPSIS
• Absence of microorganisms
• Medical asepsis–practices used to reduce the number, growth, and spread of microorganisms
• Surgical asepsis–practices that eliminate all microorganisms and spores from an object or area
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Surgical Asepsis
• Surgical or sterile technique, requires a nurse to use precautions different from those of medical asepsis.
• Nurse working with a sterile field or equipment must understand sterile technique.
• Any break in this technique results in contamination.
• Surgical asepsis is practiced in the operating room, labor and delivery area, and major diagnostic areas.
• Surgical asepsis may also be used during procedures at the bedside.
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Surgical handwashing
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Surgical Handwashing.
(From Elkin, M.K., Perry, A.G., Potter, P.A. [2004]. Nursing interventions and clinical skills. [3rd ed.]. St. Louis: Mosby.)
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Cleaning Disinfection and Sterilization
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• Cleaning
• Disinfection
• Sterilization
• Preparing for disinfection and sterilization
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CLEANSING
• Removal of soil or organic material from instruments and equipment used in providing client care.
• Involves the use of water, mechanical action, and sometimes, a detergent.
• Nurses should wear gloves, masks, and goggles during cleansing.
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Sterilization or Disinfection
• Physical Method Steam under pressure/ moist heat Boiling water Radiation Dry heat
• Chemical Process Gas Chemical solutions
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DISINFECTION
• Elimination of pathogens, except spores, from inanimate objects.
• Disinfectants–chemical solutions used to clean inanimate objects.
• Germicides–chemicals that can be applied to both animate (living) or inanimate objects to eliminate pathogens.
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STERILIZATION
• Destroying all microorganisms including spores.
• Equipment that enters normally sterile tissue or blood vessels must be sterilized.
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STERILIZATION (continued)
• Methods include: – Moist heat (steam)– Dry heat– Ethylene oxide gas
• Autoclaving (moist heat or steam) is the most common method.
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B, Receptacle receiving fluids is placed near edge of sterile table.
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Patient Teaching for Infection Control
• The nurse will need to educate patient about the nature of infection and the techniques to use in planning or controlling its spread:
– Infection control for home and hospice settings.
– Prevention of infection:
• Hand washing
• food preparation
• lines
• waste containers
• body fluid spills
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• Older adult considerations
• Cultural and Ethnic Considerations
Infection Control
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Infection Control for Home and Hospice Settings
• Nursing Process
• Assessment
• Prevention of Infection in the Home setting:
Hand hygiene
Food preparation
Linens
Waste containers
Body fluid spills
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BODY DEFENSES
• A host’s immune system is a defense against infectious agents.
• An immune response against an antigen protects the body from infection.
• Immune defenses are identified as nonspecific and specific.
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NONSPECIFIC IMMUNE DEFENSE
Protects host from all microorganisms; does not depend on prior exposure to antigen:
• Skin and normal flora.
• Mucous membranes.
• Coughing, sneezing, and tearing reflexes.
• Elimination and acidic environment.
• Inflammation.
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INFLAMMATION
Nonspecific cellular response to tissue injury:
• Redness (erythema).
• Heat.
• Pain.
• Swelling (edema).
• Loss of function.
• Purulent exudate (pus).
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SPECIFIC IMMUNE DEFENSE
Response specific to an invading antigen.
• Acquired immunity–protects individual against future invasions of already experienced antigens.
• Vaccination–an inoculation with a vaccine to produce immunity against specific diseases.
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TYPES OF INFECTION
• Localized infections–limited to defined area or single organ with symptoms that resemble inflammation (redness, tenderness, swelling), such as cold sore.
• Systemic infections–affect entire body, involve multiple organs, such as AIDS.
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NURSING DIAGNOSIS
• Risk for infection.
• Ineffective protection.
• Impaired tissue integrity.
• Impaired oral mucous membrane.
• Impaired skin integrity.
• Deficient knowledge (specify).
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• Nursing diagnosis
• Expected outcomes
• Planning
• Implementation
• Evaluation
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Questions ?