Bladder Stones – Causes, Symptoms and Treatment
Bladder stones are hard mineral deposits that form inside the urinary bladder. They can cause pain, frequent urination, and difficulty passing urine.
Things worth knowing about "Bladder Stones"
Bladder stones are hard mineral deposits that form inside the urinary bladder. They can cause pain, frequent urination, and difficulty passing urine.
What Are Bladder Stones?
Bladder stones (medically known as vesical calculi or cystoliths) are solid mineral deposits that form within the urinary bladder. They develop when urine becomes concentrated and minerals crystallize. Bladder stones are more common in men than in women and occur most frequently in older adults.
Causes
Bladder stones typically form when the bladder does not empty completely and urine remains stagnant. The most common causes include:
- Benign prostatic hyperplasia (BPH): An enlarged prostate obstructs urine flow and promotes stone formation.
- Neurogenic bladder disorders: Conditions such as multiple sclerosis or spinal cord injuries that impair bladder emptying.
- Bladder diverticula: Pouches in the bladder wall where urine can pool.
- Urinary tract infections (UTIs): Chronic infections alter urine composition and encourage crystal formation.
- Kidney stones: Stones that migrate from the kidneys into the bladder and continue to grow.
- Foreign bodies in the bladder, such as catheters or surgical sutures, can act as a nucleus for crystal formation.
- Dietary factors: A diet high in oxalate-rich foods, purines, or sodium may increase the risk.
Symptoms
Small bladder stones may not cause any symptoms. However, when they irritate the bladder wall or obstruct urine flow, the following symptoms may occur:
- Pain or burning sensation during urination
- Frequent urge to urinate, including at night (nocturia)
- Lower abdominal pain or pelvic pressure
- Blood in the urine (hematuria)
- Interrupted or weak urine stream
- Cloudy or unusually odorous urine
Severe pain, fever, or complete inability to urinate requires immediate medical attention.
Diagnosis
Bladder stones are diagnosed using several methods:
- Ultrasound (sonography): The most common and non-invasive method for visualizing bladder stones.
- X-ray: Calcium-containing stones are visible on standard X-ray images.
- Computed tomography (CT) scan: Provides detailed images and is highly sensitive for detecting all types of stones.
- Cystoscopy: Direct visualization of the bladder with a camera; also allows for simultaneous treatment.
- Urinalysis: Detection of blood, signs of infection, or crystals in the urine.
Treatment
Treatment depends on the size, composition, and cause of the bladder stones, as well as the overall health of the patient.
Conservative Management
Very small stones may pass spontaneously with increased fluid intake (at least 2 to 3 liters per day). Antibiotics are prescribed when a urinary tract infection is present.
Minimally Invasive Procedures
- Transurethral cystolitholapaxy: The most common treatment. An endoscope is inserted through the urethra, the stones are broken up, and the fragments are flushed out.
- Extracorporeal shock wave lithotripsy (ESWL): External shock waves are used to break up stones; this method is less commonly used for bladder stones than for kidney stones.
Surgical Treatment
Very large stones or cases where minimally invasive approaches are not feasible may require open surgery (cystotomy).
Treating the Underlying Cause
Addressing the underlying condition -- such as an enlarged prostate or neurogenic bladder dysfunction -- is essential to prevent recurrence.
Prevention
The following measures can help reduce the risk of bladder stone formation:
- Stay well hydrated (at least 2 liters of water per day)
- Treat urinary tract infections promptly
- Manage conditions that impair bladder emptying
- Follow a balanced diet low in salt and oxalate-rich foods
References
- European Association of Urology (EAU): Guidelines on Urolithiasis. 2023. Available at: https://uroweb.org/guidelines/urolithiasis
- Turk C. et al. - EAU Guidelines on Diagnosis and Conservative Management of Urolithiasis. European Urology, 2016.
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK): Bladder Stones. U.S. Department of Health and Human Services, 2022. Available at: https://www.niddk.nih.gov
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