Severe Diabetic Foot Infections with Sepsis

Pathophysiology and Clinical Recognition

The primary cause of hypotension with no urine output in a patient with diabetic foot is severe systemic sepsis secondary to a rapidly progressive diabetic foot infection, requiring immediate resuscitation and surgical intervention, as stated by the International Diabetes Federation 1, 2
Severe diabetic foot infections can lead to systemic inflammatory response, acute kidney injury, and volume depletion, resulting in a life-threatening condition, according to the American Diabetes Association 1, 3, 4
The International Working Group on the Diabetic Foot defines severe infection by the presence of systemic toxicity, including fever, chills, hypotension, confusion, volume depletion, and new or worsening azotemia 1

Aggressive fluid resuscitation must be initiated immediately to restore intravascular volume and renal perfusion, with a goal of mean arterial pressure >65 mmHg, as recommended by the American College of Cardiology 2, 7
Broad-spectrum antibiotics should be initiated empirically, covering MRSA, Gram-negative rods, and anaerobes, with typical regimens including vancomycin plus piperacillin-tazobactam or a carbapenem, according to the Infectious Diseases Society of America 1, 8
Metabolic stabilization, including addressing severe hyperglycemia with insulin infusion and correcting any diabetic ketoacidosis or hyperosmolar state, is crucial, as stated by the American Association of Clinical Endocrinologists 2, 7

Urgent surgical evaluation is necessary for debridement, as retained purulence or deep space infection requires surgical drainage, according to the Society for Vascular Surgery 1, 8
Vascular assessment, including evaluation of arterial perfusion, is critical, as peripheral arterial disease is present in up to 40% of diabetic foot infections, as reported by the European Society of Cardiology 1, 8, 9, 10

Severe diabetic foot infections with sepsis represent a limb-threatening and life-threatening emergency, requiring hospitalization in an intensive care setting, as stated by the American College of Emergency Physicians 1, 2
Multidisciplinary team involvement, including infectious disease, surgery, endocrinology, vascular surgery, and podiatry, improves outcomes, according to the International Working Group on the Diabetic Foot 1, 2, 8