Benign prostatic hyperplasia, if left untreated or if it becomes refractory to initial management, can lead to a number of significant complications. These complications arise from the progressive nature of bladder outlet obstruction and the subsequent pathological changes in the urinary tract. Prompt recognition and appropriate management of these complications are crucial to prevent long-term morbidity.
Acute Urinary Retention (AUR)
Acute urinary retention is the sudden and painful inability to void, and it is one of the most common and distressing complications of BPH. It often represents a urological emergency requiring immediate bladder decompression.
- Management: The initial management of AUR involves prompt bladder catheterization, either with a urethral or a suprapubic catheter, to relieve the obstruction and decompress the bladder. Following decompression, the patient should be evaluated for the underlying cause. For patients with BPH-related AUR, a trial without catheter (TWOC) can be attempted, often after a period of treatment with an alpha-blocker to relax the prostatic smooth muscle. The success rate of TWOC is variable, and many patients will ultimately require definitive surgical intervention to prevent recurrence.
Chronic Urinary Retention
Chronic urinary retention is a more insidious condition characterized by a persistently elevated post-void residual (PVR) volume, often without the patient being aware of it. It can be classified as high-pressure or low-pressure chronic retention. High-pressure chronic retention is a more serious condition that can lead to bilateral hydronephrosis and renal impairment.
- Management: The management of chronic urinary retention is aimed at decompressing the bladder and preserving renal function. This may involve long-term catheterization or definitive surgical treatment of the underlying BPH. In cases of high-pressure chronic retention with renal impairment, gradual bladder decompression may be necessary to avoid post-obstructive diuresis and electrolyte imbalances.
Recurrent Urinary Tract Infections (UTIs)
Incomplete bladder emptying due to BPH can lead to urinary stasis, which creates a favorable environment for bacterial growth and recurrent UTIs.
- Management: The management of recurrent UTIs in the context of BPH involves treating the acute infection with appropriate antibiotics and addressing the underlying obstruction to prevent recurrence. This often requires surgical intervention to improve bladder emptying.
Bladder Stones
Bladder stones, or vesical calculi, can form as a result of urinary stasis and the crystallization of urinary solutes. They can cause irritative voiding symptoms, hematuria, and recurrent UTIs.
- Management: The management of bladder stones in patients with BPH typically involves a two-pronged approach: removal of the stones and treatment of the underlying bladder outlet obstruction. The stones can be removed endoscopically (cystolitholapaxy) or through an open or minimally invasive surgical approach. This is often performed concurrently with a surgical procedure for BPH, such as TURP or HoLEP.
Gross Hematuria
Gross hematuria, or visible blood in the urine, can occur in patients with BPH due to the increased vascularity of the enlarged prostate. While often self-limiting, it can be alarming for the patient and may require intervention.
- Management: The initial management of gross hematuria involves a thorough evaluation to rule out other causes, such as bladder cancer. In cases of significant or persistent bleeding, hospitalization and bladder irrigation may be necessary. Definitive treatment of the BPH is often required to prevent recurrence.
Renal Dysfunction
In severe, long-standing cases of BPH, the sustained high pressures from bladder outlet obstruction can be transmitted to the upper urinary tract, leading to hydronephrosis and progressive renal impairment. This is a serious complication that requires urgent attention.
- Management: The management of BPH-related renal dysfunction is focused on relieving the obstruction and preserving renal function. This typically involves bladder decompression with a catheter, followed by definitive surgical treatment of the BPH. The recovery of renal function depends on the duration and severity of the obstruction.