A nurse assesses an audible grating sound (crepitus) when a client with osteoarthritis moves his knees. What is the cause of this sound?

Choice A reason: Purulent exudate is a thick, yellowgreen, or brown pus that indicates infection. It is not bloodtinged and does not drip from the wound.

Choice B reason: Serous exudate is a clear, thin, and watery fluid that is normal in the inflammatory stage of wound healing. It does not contain blood cells and is not red in color.

Choice C reason: Serosanguineous exudate is a pink or red fluid that contains both serum and blood. It is common in the proliferative stage of wound healing and may drip from the wound due to increased capillary permeability.

Choice D reason: Sanguineous exudate is a bright or dark red fluid that consists mostly of blood. It indicates active bleeding and is usually seen in traumatic or surgical wounds. It is not diluted with serum and is more viscous than serosanguineous exudate.

Choice A reason: "Because it is easy to digest." is not the best response by the nurse. This is not a valid reason for giving protein supplements to a client with a bed sore. Protein supplements may or may not be easy to digest depending on the type and amount of protein and the client's digestive system. The ease of digestion is not the main goal of protein supplementation.

Choice B reason: "If you don't like it, you don't have to take it." is not the best response by the nurse. This is a dismissive and unprofessional response that does not address the client's question or concern. Protein supplements are prescribed for a reason and the client should be educated on the benefits and risks of taking or refusing them. The nurse should also respect the client's preferences and choices and offer alternatives if possible.

Choice C reason: "These supplements have nothing to do with your wound." is not the best response by the nurse. This is a false and misleading statement that contradicts the evidencebased practice of wound care. Protein supplements have a lot to do with wound healing as they provide the essential nutrients for tissue repair and regeneration. Protein deficiency can impair wound healing and increase the risk of infection and complications.

Choice D reason: "Protein has amino acids that promote wound healing." is the best response by the nurse. This is a factual and informative statement that explains the rationale for giving protein supplements to a client with a bed sore. Protein is composed of amino acids, which are the building blocks of cells and tissues. Amino acids are involved in various processes of wound healing, such as collagen synthesis, angiogenesis, and immune response. Protein supplementation can enhance wound healing and prevent protein malnutrition.