How Are Bladder Stones Removed? Methods & Procedures

Most bladder stones are removed through a minimally invasive procedure called cystolitholapaxy, where a thin scope is passed through the urethra, the stone is broken apart with laser or pneumatic energy, and the fragments are flushed out. The whole thing can take under an hour, and many patients go home the same day. But that straightforward path is just one of several options, and the right choice depends on the stone’s size, the patient’s anatomy, and whether an underlying condition like an enlarged prostate needs to be fixed at the same time.

Why Bladder Stones Form in the First Place

Understanding why a stone appeared matters because it shapes the removal strategy. The most common driver in adults is incomplete bladder emptying. When urine sits in the bladder too long, dissolved minerals begin to crystallize, and those crystals can clump into a stone over weeks or months. Benign prostatic hyperplasia is the leading culprit: the enlarged gland squeezes the urethra, trapping urine, and roughly 3–8% of men with this condition develop bladder stones as a direct complication.¹ Urinary tract infections add fuel by altering urine chemistry: bacteria that produce the enzyme urease break down urea into ammonia, raising the pH and causing mineral salts to precipitate into struvite stones.¹ Other causes include neurogenic bladder conditions, bladder diverticula, foreign bodies, and metabolic disorders like gout.²

The underlying cause dictates whether simply removing the stone will solve the problem or just delay its return. A stone caused by an enlarged prostate, for example, is likely to recur unless the obstruction itself is treated. That consideration runs through every removal decision.

How Stones Are Found Before Removal

Diagnosis usually starts with imaging. A CT scan of the abdomen and pelvis without contrast is consistently the most accurate way to detect urinary stones, though it does expose you to radiation.³ Ultrasound avoids radiation entirely and, in emergency department settings, has been shown to perform comparably to CT in terms of diagnostic accuracy.³ Plain X-rays can catch many stones but miss those made of uric acid, which are radiolucent. In practice, most urologists will also perform a cystoscopy, threading a small camera into the bladder to get a direct look at the stone’s size, location, and number before deciding on a treatment plan.

Transurethral Cystolitholapaxy

This is the first-line approach for most bladder stones in adults. The surgeon passes an endoscope through the urethra into the bladder, identifies the stone visually, and breaks it up using an energy source. Holmium:YAG laser is one of the most widely used tools: a thin laser fiber is threaded through the scope and vaporizes the stone on contact.⁴ Pneumatic lithotripsy is the other common option, using a jackhammer-like probe to shatter the stone mechanically.⁵ Once the stone is fragmented, pieces are irrigated out or suctioned through the scope.

Results are consistently good. In a study of patients with stones averaging 3.6 cm, all were rendered completely stone-free using holmium laser lithotripsy, with a mean operative time of about 51 minutes.⁶ The procedure was well tolerated, and no major complications occurred. After more than 16 months of follow-up, none of those patients developed a recurrent stone or urethral stricture.⁶ Larger series with variable-size stones confirm the pattern: complete stone clearance in all patients, with no conversions to open surgery and no late complications related to the procedure over a mean follow-up of about three years.⁷

One practical concern with the transurethral route is whether the scope and fragments can pass through the urethra without causing damage. For large stones, some surgeons use a nephroscope (a wider scope originally designed for kidney work) instead of a standard cystoscope. In a randomized comparison of the two approaches for large bladder stones, the nephroscope group had a significantly shorter operative time — about 48 minutes versus 68 minutes — with no complications in either group.⁸

Percutaneous Cystolithotripsy

When a stone is too large to break up efficiently through the urethra, or when the patient’s anatomy makes the transurethral route impractical, surgeons can go through the abdominal wall instead. A small puncture is made just above the pubic bone directly into the bladder, and a wider tract is created through which a nephroscope is inserted. Typical indications include stones larger than 3 cm, multiple stones over 1 cm, or patients whose urethral anatomy prevents passage of a scope.⁹ The stone is then fragmented with ultrasound or pneumatic energy and the pieces are extracted through the larger working channel.

Because the tract is wider than a urethra, bigger fragments can be removed more quickly, and there is no risk of urethral injury. A study using a self-retaining laparoscopic trocar for the access showed that the technique was straightforward, with the stone fragmented via ultrasound and pneumatic probes through a standard nephroscope.¹⁰ In pediatric patients, percutaneous removal has been directly compared to traditional open surgery. The percutaneous approach achieved similar stone clearance rates while cutting operative time nearly in half (about 46 minutes versus 72 minutes) and reducing hospital stay from about 3.5 days to under 2 days.¹¹

Open Cystolithotomy

Open surgery to remove a bladder stone involves making an incision in the lower abdomen and cutting directly into the bladder wall. It sounds dramatic, but for very large or very hard stones, it can actually be the fastest option. In a comparison of three techniques in children, open surgery had the shortest operative time — roughly 26 minutes on average — compared to about 31 minutes for percutaneous and 36 minutes for transurethral laser.¹² The trade-off is recovery: hospital stay after open surgery averaged about 3.5 days, significantly longer than the other two approaches.¹²

Open surgery remains relevant when a stone is enormous, when it has formed around a foreign body, or when the bladder itself needs repair. In one documented case, a stone measuring 5 by 3 cm had formed around a SIM card inserter lodged in the bladder, and open vesicolithotomy was the chosen approach to safely remove both the stone and the foreign body.¹³

Extracorporeal Shock Wave Lithotripsy

ESWL uses focused shock waves delivered from outside the body to break stones into small enough pieces that they can pass naturally in the urine. It is a well-established treatment for kidney and ureteral stones. For bladder stones, it is used less frequently because the bladder’s position deep in the pelvis and its ability to move makes targeting trickier. When it is used, patients tend to experience less postoperative pain compared to conventional surgical approaches, and recovery is quicker.¹⁴ ESWL is generally reserved for moderate-sized bladder stones in patients who are not good candidates for endoscopic procedures. For stones that are large, very hard, or associated with outflow obstruction that also needs treatment, other methods are preferred.

Medical Dissolution for Uric Acid Stones

Not every bladder stone needs a procedure. Uric acid stones, which form in acidic urine, can sometimes be dissolved with oral medication that raises urine pH. The principle is simple: uric acid is soluble at a pH above about 6.5, so taking potassium citrate or sodium bicarbonate can shift the chemistry enough to dissolve existing stones over weeks to months. This approach works best for smaller, lower-density stones.

In one study of patients maintained on dissolution therapy, about two-thirds achieved complete resolution of their stones, while the rest saw a partial reduction averaging about 68% of their stone burden.¹⁵ A larger study found a complete response rate of about 61% at three months, with smaller and lower-density stones responding significantly better.¹⁶ The catch is that this only works for uric acid stones — calcium-based, struvite, and cystine stones will not dissolve with alkalinization. Your urologist will often suspect uric acid composition based on low stone density on CT or acidic urine pH, but stone analysis after any procedural fragment is the most reliable way to confirm.

Treating the Underlying Cause at the Same Time

When a bladder stone has formed because of prostatic obstruction, removing the stone alone may feel like treating the symptom while ignoring the disease. Many urologists will combine stone removal with a procedure to relieve the obstruction — most commonly a transurethral resection of the prostate (TURP) — in a single session. A systematic review and meta-analysis found that performing both procedures together substantially reduces stone recurrence and improves lower urinary tract symptoms without meaningfully increasing serious perioperative risk.¹⁷

One analysis estimated that adding TURP to cystolithotripsy reduced the need for repeat stone surgery by about 72%.¹⁸ A separate series that combined open cystolithotomy with TURP reported a 100% stone-free rate, shorter total operative time than doing the procedures on separate occasions, and a complication rate of only 5%.¹⁹ The general consensus has shifted toward combined surgery in selected cases — specifically when the stone is clearly a consequence of prostatic obstruction and the patient is fit for a slightly longer procedure.

Bladder Stones in Children

Bladder stones in children are more common in certain parts of the world, particularly South Asia and the Middle East, where dietary and nutritional factors play a larger role. The removal techniques are the same in principle but modified for smaller anatomy. Transurethral lithotripsy can be performed using a slimmer ureteroscope rather than a full-sized cystoscope.⁵ In a study of children treated with holmium laser through the urethra, all were stone-free after a single session, with no urethral strictures developing during follow-up.²⁰

That said, the complication picture is slightly different in kids. A randomized trial comparing transurethral and percutaneous approaches in boys found a complication rate of 22% in the transurethral group versus 10% in the percutaneous group, though the difference did not reach statistical significance.²¹ Complications following transurethral pneumatic lithotripsy in children are not uncommon and are influenced by factors like age, stone size, and existing conditions.²² Because the pediatric urethra is still developing, some surgeons prefer the percutaneous route for larger stones to avoid any risk of long-term urethral damage.

Robotic-assisted surgery has also entered the conversation for select pediatric cases. Preliminary results suggest robotic cystolithotomy is feasible for stones larger than about 15–20 mm, with the advantage of removing the stone whole (no need to crush it) and closing the bladder wall with precise robotic suturing.²³ It is far from routine and is reserved for large or complex cases, but it represents the direction the field is moving.

Patients with Augmented Bladders

People who have had bladder augmentation surgery — a procedure that enlarges the bladder using a segment of bowel — face a uniquely high risk of stone formation. The bowel tissue produces mucus that acts as a scaffold for mineral deposition, and the altered bladder shape can make emptying difficult. In a long-term follow-up of augmented bladder patients, about 19% required surgery specifically for bladder stones, with the first stone typically appearing a few years after the augmentation. Patients with a continent urinary stoma had an even higher stone rate.²⁴

Removing stones from an augmented bladder is trickier than in a native bladder. The internal anatomy is altered, the mucus-producing lining can obscure visibility during endoscopy, and the walls may be more fragile. Percutaneous or open approaches are frequently needed. For these patients, routine surveillance with imaging and, where possible, regular bladder irrigation to clear mucus are important parts of ongoing care.

Preventing Recurrence After Removal

Getting the stone out is only half the job. Without addressing the factors that formed it, stones have a real tendency to come back. European Association of Urology guidelines recommend that every patient undergo at least a basic metabolic evaluation after a stone episode, including analysis of the stone itself if fragments are available.²⁵ At a minimum, all stone formers should increase fluid intake enough to produce at least two liters of urine per day. Dietary adjustments depend on stone type: reducing sodium and animal protein helps with calcium stones, while limiting purine-rich foods and maintaining alkaline urine helps with uric acid stones.

Patients classified as high-risk — those with recurrent stones, stones in both kidneys, certain metabolic conditions, or stones forming in an augmented bladder — should have more detailed evaluation including 24-hour urine collection to measure specific mineral and chemical levels. Specific drug therapy exists for several stone types: thiazide diuretics for calcium stones with high urine calcium, potassium citrate for low urine citrate or uric acid stones, and allopurinol for high uric acid levels.²⁵ For bladder stones specifically, treating the root cause — prostatic obstruction, neurogenic bladder dysfunction, chronic infection — is probably the single most impactful step you can take against recurrence.

One of Surgery’s Oldest Procedures

Bladder stone surgery has a remarkably long history. The first recorded details of perineal lithotomy — cutting into the bladder through the perineum to extract a stone — are attributed to the Roman physician Cornelius Celsus in the first century AD.²⁶ For centuries, “cutting for the stone” was one of the few surgical procedures attempted at all, often performed by itinerant specialists rather than general physicians. The Hippocratic Oath’s famous admonition to “not cut for the stone, but leave this to practitioners of that craft” reflects how specialized and dangerous the operation was considered. Today, the same problem that once required a terrifying open incision with no anesthesia and high mortality is handled in under an hour through a scope the width of a pencil, usually with a trip home the same afternoon.

1
PubMed Central. From Prostate Enlargement to Bladder Stone: Large Bladder Stone as a Complication of Long‐Standing BPH: A Case Study
2
PubMed Central. Risk factors for bladder calculi in patients with benign prostatic hyperplasia
3
Nature Reviews Urology. An overview of kidney stone imaging techniques
4
PubMed Central. Retrograde-Assisted Percutaneous Cystolitholapaxy Versus Transurethral Cystolithotripsy With Holmium-YAG Laser: A Retrospective Study
5
PubMed Central. Comparison of the Safety and Efficacy of Laser Versus Pneumatic Intracorporeal Lithotripsy for Treatment of Bladder Stones in Children
6
PubMed. Transurethral cystolithotripsy with holmium laser under local anesthesia in selected patients
7
PubMed Central. Transurethral cystolitholapaxy with the AH-1 stone removal system for the treatment of bladder stones of variable size
8
PubMed. The randomized comparison of two different endoscopic techniques in the management of large bladder stones: transurethral use of nephroscope or cystoscope?
9
PubMed. Percutaneous suprapubic cystolithotripsy for treatment of large bladder calculi
10
PubMed. Percutaneous cystolithotripsy using self-retaining laparoscopic trocar for management of large bladder stones
11
Journal of Saidu Medical College Swat. Assessing the Efficacy and Safety of Minimally Invasive Versus Open Bladder Stone Removal in Pediatric Patients
12
PubMed Central. Surgical Management of Vesical Stones in Children: A Comparison Between Open Cystolithotomy, Percutaneous Cystolithotomy and Transurethral Cystolithotripsy With Holmium-YAG Laser
13
Radiology Case Reports. Multiple lower urinary tract calculi induced by foreign bodies insertion: A case report
14
PubMed Central. The Clinical Efficacy and Safety of Extracorporeal Shock Wave Lithotripsy in the Treatment of Patients with Urinary Calculi
15
PubMed. Medical dissolution therapy for the treatment of uric acid nephrolithiasis
16
PubMed Central. Oral chemolysis is an effective, non-invasive therapy for urinary stones suspected of uric acid content
17
PubMed. Concomitant benign prostatic enlargement and bladder stone surgery versus bladder stone treatment alone: results from a systematic review and meta-analysis of comparative studies by the EAU endourology section
18
PubMed Central. Simultaneous transurethral resection of the prostate and cystolithotripsy: A urological dilemma examined
19
PubMed. Combined cystolithotomy and transurethral resection of prostate: best management of infravesical obstruction and massive or multiple bladder stones
20
PubMed. Transurethral Holmium Laser Cystolithotripsy in Children: Single Center Experience
21
PubMed. A randomised trial comparing transurethral to percutaneous cystolithotripsy in boys
22
Journal of Health, Wellness and Community Research. Complications of Transurethral Pneumatic Lithotripsy in Children with Bladder Stone Disease
23
Frontiers in Pediatrics. Minimally Invasive Management of Bladder Stones in Children
24
PubMed. Additional surgery in patients with bladder augmentation
25
PubMed. Metabolic evaluation and recurrence prevention for urinary stone patients: EAU guidelines
26
PubMed Central. The history of urinary stones: in parallel with civilization