Final answer:
The client's condition is deteriorating as indicated by the yellow wound tissue with purulent drainage and a foul odor, which suggests a severe bacterial infection and requires immediate medical attention.
Step-by-step explanation:
The information that indicates the client's condition is deteriorating is B) Wound tissue is yellow with purulent drainage and foul odor. This symptom is associated with a bacterial infection, signifying the presence of pus and a possible infection that has worsened. Purulent drainage with a foul odor is often indicative of a serious infection that might require prompt medical attention, as seen in conditions like necrotizing fasciitis or gas gangrene. Additionally, yellow wound tissue can imply the presence of slough or devitalized tissue, which is concerning.
By contrast, A) Presence of pink wound tissue with no drainage is a sign of healthy granulation tissue and healing. C) An Oxygen saturation of 93% on room air is within a normal, acceptable range. D) A WBC count of 12,000/mm3 is slightly elevated but may not necessarily indicate deterioration, as white blood cell counts can elevate as a normal response to infection or stress.