Evidence Based Practice Aseptic Technique

[Rosalie Checca]

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The fact that there is a relationship between the standards of aseptic technique performance and the rise in hospital infection rates has been suggested by the Department of Heath's (DoH's, 2004) 'Winning Ways' document. This literature review considers how the aseptic technique is performed in the UK, and examines the nature of ritualistic and evidence-based practice underpinning this skill-based procedure. The findings have identified an emerging glove culture and continuing poor hand-hygiene practices. The alternative 'clean technique' is also adopted widely in clinical practice which confuses the aseptic theory-practice gap. While it is hard to pinpoint an actual time or event that causes infection, it is unlikely nurses will ever become involved in litigation as a result of a poorly performed aseptic technique. However, the review concludes that nurses should not become too complacent. It briefly considers how performance of the aseptic technique can be improved, through creative educational strategy, applied risk assessment and clinical audits of nurses' practices.

According to the Centers for Disease Control and Prevention (CDC), over 2 million patients in America contract a healthcare-associated infection, and 99,000 patients die from a healthcare-associated infection every year.[1] Healthcare-associated infections (HAIs) are unintended and often preventable infections caused by care received in a health care setting. Healthcare-associated infections can be prevented by consistently following standard precautions and transmission-based precautions outlined by the CDC (2020). Standard precautions are used when caring for all patients and include performing appropriate hand hygiene; wearing personal protective equipment when indicated; implementing category-specific transmission precautions; encouraging respiratory hygiene; and following environmental infection control measures, including handling of sharps, laundry, and hazardous waste. Additional infection control measures include the appropriate use of aseptic technique and sterile technique when performing nursing procedures to protect the patient from transmission of microorganisms.[2] Each of these strategies to keep patients and health care workers free of infection is discussed in further detail in this chapter.

There are four categories of transmission-based precautions: contact precautions,enhanced barrier precautions, droplet precautions, and airborne precautions. Transmission-based precautions are used when the route(s) of transmission is (are) not completely interrupted using standard precautions alone. Some diseases, such as tuberculosis, have multiple routes of transmission so more than one transmission-based precautions category must be implemented. See Table 4.2 outlining the categories of transmission precautions with associated PPE and other precautions. When possible, patients with transmission-based precautions should be placed in a single occupancy room with dedicated patient care equipment (e.g., blood pressure cuffs, stethoscope, thermometer). Transport of the patient and unnecessary movement outside the patient room should be limited. However, when transmission-based precautions are implemented, it is also important for the nurse to make efforts to counteract possible adverse effects of these precautions on patients, such as anxiety, depression, perceptions of stigma, and reduced contact with clinical staff.

Gloves protect both patients and health care personnel from exposure to infectious material that may be carried on the hands. Gloves are used to prevent contamination of health care personnel hands during activities such as the following:

Nonsterile disposable medical gloves for routine patient care are made of a variety of materials, such as latex, vinyl, and nitrile. Many people are allergic to latex, so be sure to check for latex allergies for the patient and other health care professionals. See Figure 4.5[18] for an image of nonsterile medical gloves in various sizes in a health care setting. At times, gloves may need to be changed when providing care to a single patient to prevent cross-contamination of body sites. It is also necessary to change gloves if the patient interaction requires touching portable computer keyboards or other mobile equipment that is transported from room to room. Discarding gloves between patients is necessary to prevent transmission of infectious material. Gloves must not be washed for subsequent reuse because microorganisms cannot be reliably removed from glove surfaces and continued glove integrity cannot be ensured.[19]

Figure 4.5 Nonsterile Medical GlovesWhen gloves are worn in combination with other PPE, they are put on last. Gloves that fit snugly around the wrist should be used in combination with isolation gowns because they will cover the gown cuff and provide a more reliable continuous barrier for the arms, wrists, and hands.

Gloves should be removed properly to prevent contamination. See Figure 4.6[20] for an illustration of properly removing gloves. Hand hygiene should be performed following glove removal to ensure the hands will not carry potentially infectious material that might have penetrated through unrecognized tears or contaminated the hands during glove removal. One method for properly removing gloves includes the following steps:

The mucous membranes of the mouth, nose, and eyes are susceptible portals of entry for infectious agents. Masks are used to protect these sites from entry of large infectious droplets. See Figure 4.8[24] for an image of nurse wearing a surgical mask. Masks have three primary purposes in health care settings:

Masks may be used in combination with goggles or a face shield to provide more complete protection for the face. Masks should not be confused with respirators used during airborne transmission-based precautions to prevent inhalation of small, aerosolized infectious droplets.[26]

Eye protection chosen for specific work situations (e.g., goggles or face shields) depends upon the circumstances of exposure, other PPE used, and personal vision needs. Personal eyeglasses are not considered adequate eye protection. See Figure 4.10[28] for an image of a health care professional wearing a face shield along with a N95 respirator.

A newer piece of equipment used for respiratory protection is the powered air-purifying respirator (PAPR). A PAPR is an air-purifying respirator that uses a blower to force air through filter cartridges or canisters into the breathing zone of the wearer. This process creates an air flow inside either a tight-fitting facepiece or loose-fitting hood or helmet, providing a higher level of protection against aerosolized pathogens, such as COVID-19, than a N95 respirator. See Figure 4.11[29] for an example of PAPR in use.

The CDC currently recommends N95 or higher level respirators for personnel exposed to patients with suspected or confirmed tuberculosis and other airborne diseases, especially during aerosol-generating procedures such as respiratory-tract suctioning.[30] It is important to apply, wear, and remove respirators appropriately to avoid contamination. See Figure 4.12[31] for CDC recommendations when wearing disposable respirators.

Follow agency policy for donning PPE according to transmission-based precautions. More than one donning method for putting on PPE may be acceptable. The CDC recommends the following steps for donning PPE:[32]

Health care personnel are advised to wear a mask and use frequent hand hygiene when examining and caring for patients with signs and symptoms of a respiratory infection. Health care personnel who have a respiratory infection are advised to avoid direct patient contact, especially with high-risk patients. If this is not possible, then a mask should be worn while providing patient care.[40]

Routine cleaning and disinfecting surfaces in patient-care areas are part of standard precautions. The cleaning and disinfecting of all patient-care areas are important for frequently touched surfaces, especially those closest to the patient that are most likely to be contaminated (e.g., bedrails, bedside tables, commodes, doorknobs, sinks, surfaces, and equipment in close proximity to the patient).

Medical waste requires careful disposal according to agency policy. The Occupational Safety and Health Administration (OSHA) has established measures for discarding regulated medical waste items to protect the workers who generate medical waste, as well as those who manage the waste from point of generation to disposal. Contaminated waste is placed in a leak-resistant biohazard bag, securely closed, and placed in a labeled, leakproof, puncture-resistant container in a storage area. Sharps containers are used to dispose of sharp items such as discarded tubes with small amounts of blood, scalpel blades, needles, and syringes.[42]

Injuries due to needles and other sharps have been associated with transmission of blood-borne pathogens (BBP), including hepatitis B, hepatitis C, and HIV to health care personnel. The prevention of sharps injuries is an essential element of standard precautions and includes measures to handle needles and other sharp devices in a manner that will prevent injury to the user and to others who may encounter the device during or after a procedure. The Bloodborne Pathogens Standard is a regulation that prescribes safeguards to protect workers against health hazards related to blood-borne pathogens. It includes work practice controls, hepatitis B vaccinations, hazard communication and training, plans for when an employee is exposed to a BBP, and record keeping.

If you are stuck by a needle or other sharps or are exposed to blood or other potentially infectious materials in your eyes, nose, mouth, or on broken skin, immediately flood the exposed area with water and clean any wound with soap and water. Report the incident immediately to your instructor or employer and seek immediate medical attention according to agency and school policy.

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