Bladder Stone Treatment in Singapore

Bladder stones form when urine stays in the bladder too long. When the bladder does not empty, dissolved minerals become increasingly concentrated. Over time, mineral salts such as calcium oxalate, uric acid, or struvite crystallise and clump into solid masses.

Think of a pot of salt water left on a low simmer. As the water slowly evaporates, the salt concentration rises until crystals form on the bottom. Inside your bladder, incomplete emptying is the “evaporation,” and the crystals are the beginnings of a stone.

Benign prostatic hyperplasia (an enlarged prostate) is one of the most frequent causes in male patients. As the prostate grows, it compresses the urethra and prevents the bladder from emptying fully. The residual urine that remains creates conditions for stone formation.

Neurogenic bladder dysfunction is another significant contributor. Conditions affecting nerve signalling to the bladder, such as spinal cord injuries, stroke, or diabetes-related nerve damage, impair the bladder’s ability to contract and empty efficiently.

Bladder diverticula [pouch-like outpouchings in the bladder wall] can trap urine in small pockets where stones may form undetected. Recurrent urinary tract infections, particularly those caused by urease-producing bacteria, can alter urine chemistry and promote struvite stone formation.

In some cases, foreign bodies within the bladder, such as retained surgical sutures, migrated mesh material, or catheter fragments, provide a surface on which minerals accumulate.

Chronic dehydration and prolonged immobility can contribute to concentrated urine and incomplete bladder emptying. Bladder stones are most often secondary to an underlying structural or functional urological condition rather than a standalone lifestyle problem.

Drinking more water, while helpful, will not dissolve a stone that has already formed or address the obstruction that caused it. Identifying and managing the root cause is essential to preventing recurrence.

Sometimes a bladder stone is discovered by chance during imaging performed for an unrelated reason. If the stone is small and you have no symptoms, your urologist may recommend a period of specialist-supervised observation rather than immediate intervention.

In the specific case of a small migratory stone discovered incidentally in an adult without symptoms, your urologist may adopt an observational approach, as active treatment may not be immediately required. However, unlike ureteral stones, bladder stones are generally unlikely to pass spontaneously, and any such decision must be guided entirely by your specialist.

Even when the stone appears clinically insignificant, investigating and addressing any underlying cause of urinary stasis remains important. A “watch and wait” approach should always be guided by your specialist, with scheduled follow-up imaging.

For symptomatic stones of moderate size, transurethral cystolitholapaxy [a minimally invasive procedure performed through the urethra, without any external incision] is a standard approach. An endoscope, typically a cystoscope, nephroscope, or resectoscope, is passed into the bladder, and the stone is fragmented using a specialised energy source before the pieces are irrigated out.

The choice of energy source, which may include pneumatic, laser, ultrasonic, electrohydraulic, or mechanical lithotripsy, depends on the stone’s size and characteristics, available equipment, and the urologist’s clinical judgement.

This approach also allows the specialist to inspect the bladder lining and evaluate the bladder outlet for signs of obstruction. As with any procedure, inherent risks include infection, bleeding, and the possibility of incomplete stone clearance. These should be discussed thoroughly during your consultation.

When the stone burden is very large, the composition is extremely hard, or a concurrent condition requires surgical correction, a more direct approach may be necessary.

• Open suprapubic cystolithotomy involves a small incision in the lower abdomen to directly access and open the bladder, allowing removal of the stone — intact or in fragments — under direct vision.
• Percutaneous suprapubic offers an alternative by accessing the bladder through a smaller tract, through which the stone is fragmented and removed.

These approaches are considered when endoscopic fragmentation would be impractical, or when a combined procedure offers a more appropriate option. For example, a patient with a large bladder stone caused by significant prostatic enlargement may benefit from stone removal performed at the same time as a prostatectomy.