A nurse is reviewing the client's medical record in the presurgical holding area. Which of the following places the client at risk for a surgical site infection?

Choice A rationale A history of deep vein thrombosis increases a patient's risk for future venous thromboembolism and pulmonary embolism during the sedentary postoperative period. However, it is not a direct physiological risk factor for the development of a surgical site infection. Infection risk is primarily driven by factors that impair the immune response, decrease tissue perfusion, or introduce pathogens. While DVT is a significant surgical concern, it does not mechanically or biologically compromise the primary wound healing process. Choice B rationale A body mass index of 19 falls within the normal and healthy range of 18.5 to 24.9. Patients who are significantly underweight or morbidly obese are at higher risk for surgical site infections due to poor nutrition or poor vascularity of adipose tissue, respectively. Because this patient's BMI is within the expected parameters, they do not have the specific risks associated with malnourishment or excessive subcutaneous fat that often complicate the healing of surgical incisions and increase infection rates. Choice C rationale While advanced age can be a factor in slowed wound healing due to naturally declining physiological reserves, a 55-year-old individual is generally not considered to be at a significantly increased risk for infection based on age alone. Generally, the risk becomes much more pronounced in the very elderly, such as those over 75 or 80, where the immune system is significantly senescent. At 55, most individuals still possess adequate immune function and tissue regenerative capacity to heal. Choice D rationale Type 2 diabetes mellitus is a major risk factor for surgical site infections. Elevated blood glucose levels impair leukocyte function, specifically neutrophilic phagocytosis, which is the body's primary defense against invading bacteria. Chronic hyperglycemia also damages microvasculature, leading to decreased oxygen and nutrient delivery to the surgical site. This environment hinders the inflammatory and proliferative phases of wound healing, providing a fertile ground for bacterial growth and significantly increasing the likelihood of postoperative infection.