Which of the following is NOT a common cause of urinary obstruction leading to post-renal acute kidney injury?

Low blood pressure is not a common cause of urinary obstruction leading to post-renal acute kidney injury because it does not directly obstruct the flow of urine. Instead, post-renal acute kidney injury occurs when there is an obstruction in the urinary tract that prevents urine from passing through, which can lead to backpressure on the kidneys.

Prostatic hypertrophy, urinary tract infections, and kidney stones are all conditions that can create blockages in the urinary system. Prostatic hypertrophy can enlarge the prostate gland, especially in older men, and compress the urethra, thereby obstructing urine flow. Urinary tract infections can lead to swelling and inflammation, which might also obstruct normal urinary flow. Kidney stones can physically block the urinary tract as they move through, causing obstruction and potential injury to the kidneys. In contrast, low blood pressure typically affects kidney function by reducing blood flow and perfusion but does not directly cause an obstruction in the urinary pathway.