A client does not understand why vision loss due to glaucoma is irreversible. What is the nurse's best explanation?

Choice A reason: Cleansing the skin around the pins is the action that the nurse takes first, because it is the most urgent and relevant action. Cleansing the skin around the pins is a procedure that involves removing any dirt, debris, or secretions from the pin sites, which can help prevent or treat infection, inflammation, or pain. Cleansing the skin around the pins is a priority intervention, as it can reduce the risk of complications, such as osteomyelitis, sepsis, or pin loosening.

Choice B reason: Collecting a culture of the purulent fluid is not the action that the nurse takes first, because it is not the most urgent and relevant action. Collecting a culture of the purulent fluid is a procedure that involves obtaining a sample of the pus from the pin sites and sending it to the laboratory for analysis, which can help identify the type and source of infection. Collecting a culture of the purulent fluid is an important intervention, but it should be done after cleansing the skin around the pins, and with a medical order and a sterile technique.

Choice C reason: Administering an antibiotic is not the action that the nurse takes first, because it is not the most urgent and relevant action. Administering an antibiotic is a procedure that involves giving the client an antimicrobial agent, which can help fight or prevent infection. Administering an antibiotic is an important intervention, but it should be done after cleansing the skin around the pins, and with a medical order and a proper route.

Choice D reason: Instructing the client to complete exercises of the affected extremity is not the action that the nurse takes first, because it is not the most urgent and relevant action. Instructing the client to complete exercises of the affected extremity is a procedure that involves teaching the client how to move and strengthen the muscles and joints of the limb in traction, which can help prevent or treat atrophy, contracture, or thrombosis. Instructing the client to complete exercises of the affected extremity is an important intervention, but it should be done after cleansing the skin around the pins, and with a medical order and a safe technique.

Choice A reason: Inflammation is not an example of a client's primary defense to infection. Inflammation is a secondary defense to infection, which is activated after the primary defense has been breached. Inflammation is a complex process that involves the release of chemical mediators, the dilation of blood vessels, the increase of blood flow, the migration of white blood cells, and the formation of exudate. Inflammation aims to contain, neutralize, and eliminate the infectious agent and to repair the damaged tissue.

Choice B reason: Fever is not an example of a client's primary defense to infection. Fever is a secondary defense to infection, which is activated after the primary defense has been breached. Fever is an elevation of the body temperature above the normal range, which is usually 36.5 to 37.5 degrees Celsius or 97.7 to 99.5 degrees Fahrenheit. Fever is a systemic response to infection that is regulated by the hypothalamus, which is the part of the brain that controls the body's thermostat. Fever enhances the immune system's activity and inhibits the growth of some pathogens.

Choice C reason: Phagocytosis is not an example of a client's primary defense to infection. Phagocytosis is a secondary defense to infection, which is activated after the primary defense has been breached. Phagocytosis is a process that involves the engulfment and destruction of foreign particles, such as bacteria, by specialized cells, such as macrophages and neutrophils. Phagocytosis is a type of cellular immunity that eliminates the infectious agent and prevents its spread.

Choice D reason: Intact skin is an example of a client's primary defense to infection. Intact skin is the first and most important line of defense against infection, as it forms a physical barrier that prevents the entry of pathogens into the body. Intact skin also has chemical and biological properties that resist infection, such as the acidic pH, the secretion of sebum and sweat, and the presence of normal flora. Intact skin protects the underlying tissues and organs from infection and injury.