A nurse is caring for a group of clients on a medical surgical unit. Which of the following clients is at greatest risk for urinary retention?

A. The client who was treated with antibiotics for a staphylococcal infection of the skin 2 weeks ago.: A resolved cutaneous infection treated with antibiotics does not typically interfere with the autonomic nervous system or the mechanical function of the bladder. There is no physiological link between a past skin infection and acute urinary retention. This client’s history does not place them at an elevated risk for bladder emptying issues. B. The client who reported eating a diet high in calcium oxalate.: Diets high in calcium oxalate increase the risk for the formation of renal calculi within the kidneys or ureters. While a stone can cause an obstruction, it usually presents as renal colic rather than generalized urinary retention unless the stone is lodged in the urethra. This dietary factor is more specific to urolithiasis than acute retention. C. The client who had general anesthesia for back surgery 4 hr ago.: General anesthesia and spinal opioids significantly depress the parasympathetic nervous system, leading to bladder atony and decreased detrusor muscle contraction. Furthermore, surgery near the spinal nerves can temporarily disrupt the micturition reflex required for voiding. Postoperative clients require close monitoring for retention during the immediate recovery period. D. The client who has a history of liver failure.: Liver failure leads to systemic complications like ascites and coagulopathy but does not directly cause the neurological or mechanical failure of the bladder. While fluid shifts occur, they do not typically manifest as an inability to expel urine from the bladder. Liver disease is not a primary risk factor for acute urinary retention.