The nurse is preparing to administer medications to a client with osteoarthritis. What is the purpose of the medications?

Choice A reason: Color is an important indicator of the blood flow and oxygenation to the affected extremity. The nurse should compare the color of the skin, nails, and mucous membranes of the affected and unaffected extremities and look for any signs of pallor, cyanosis, or mottling. These signs can indicate ischemia, hypoxia, or impaired circulation, which can lead to tissue damage or necrosis.

Choice B reason: Temperature is another important indicator of the blood flow and oxygenation to the affected extremity. The nurse should compare the temperature of the skin of the affected and unaffected extremities by palpating with the back of the hand and look for any signs of warmth or coolness. These signs can indicate inflammation, infection, or reduced perfusion, which can affect the healing process or cause complications.

Choice C reason: Ecchymosis is not an indicator of the neurovascular status of the affected extremity. Ecchymosis is the discoloration of the skin caused by bleeding under the skin, which can result from trauma, surgery, or anticoagulant therapy. Ecchymosis is expected after an ORIF of a femur fracture and does not necessarily indicate a problem with the blood flow or oxygenation to the extremity.

Choice D reason: Skin integrity is not an indicator of the neurovascular status of the affected extremity. Skin integrity is the condition of the skin and its ability to resist damage, infection, or breakdown. Skin integrity can be affected by factors such as pressure, friction, moisture, or foreign bodies. The nurse should assess the skin integrity of the affected extremity and look for any signs of wounds, ulcers, or infections, but these signs do not reflect the neurovascular status of the extremity.

Choice E reason: Sensation is an important indicator of the nerve function and innervation of the affected extremity. The nurse should assess the sensation of the affected extremity by asking the client to report any numbness, tingling, or pain, or by testing the client's response to light touch, pressure, or temperature. These signs can indicate nerve damage, compression, or irritation, which can affect the mobility and function of the extremity.

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.