Gallstone lithotripsy: crushing

The term "lithotripsy" covers several different approaches to biliary tract treatment. Historically, extracorporeal shock wave lithotripsy and bile acid dissolution have been tried for gallstones, but current guidelines do not recommend these methods due to low efficacy, high recurrence rates, and lack of complication prevention. The standard treatment for symptomatic gallstones is laparoscopic cholecystectomy. [1]

For common bile duct stones, "crushing" most often means contact lithotripsy within the duct during endoscopic retrograde cholangiopancreatography (ERCP): mechanical, electrohydraulic, or laser, usually under peroral cholangioscopy. These techniques are not necessary for everyone, but are only needed for "difficult" stones when standard removal techniques have failed or are expected to be unrealistic. [2]

The key point: different anatomical regions require different strategies. For gallbladder stones, surgery remains the standard and produces lasting results. For duct stones, endoscopic removal is the preferred option; lithotripsy is a tool for complex cases, allowing for complete duct sanitation without open surgery. [3]

Table 1. Gallbladder and bile ducts

Localization of stones	What is considered standard?	The role of lithotripsy today	What the Guides Say
Gallbladder	Laparoscopic cholecystectomy	Extracorporeal shock wave lithotripsy and dissolution are not recommended	EASL, NICE, multicenter reviews
Common bile duct	Endoscopic stone removal	Contact lithotripsy for difficult stones	ESGE, ASGE, modern reviews
Total for manuals. [4]

When is "splitting" appropriate and when is it not?

For symptomatic gallstones and the absence of severe contraindications, elective laparoscopic cholecystectomy is recommended. Early post-examination reduces the risk of recurrence and conversion. Extracorporeal shock wave lithotripsy for gallstones has a low cure rate and a high stone recurrence rate over a 5- to 10-year period, so it is not used routinely. [5]

If stones are located in the common bile duct, the first choice is endoscopic retrograde cholangiopancreatography with sphincterotomy and stone extraction. When stones are large, impacted, multiple, located above the stricture, or not amenable to standard methods, contact lithotripsy under peroral cholangioscopy is used: electrohydraulic or laser. These approaches demonstrate a high rate of complete duct clearance. [6]

Following endoscopic removal of duct stones associated with gallstones, early laparoscopic cholecystectomy is recommended to reduce the risk of recurrent biliary events. Specific timeframes vary in recommendations, from "within 72 hours" to "within 2 weeks," and are chosen based on the clinical situation and resources. [7]

Table 2. Criteria for “difficult” common bile duct stones

Sign	Examples
Size	Large stones, usually more than 10-15 mm
Retention factor	Impacted stone, diverticulum, stricture, postoperative anatomy
Quantity	Multiple stones, "stone path"
Failure of standard techniques	Loop, basket, balloon, large papillotomy are insufficient
Total for guides and reviews. [8]

What the data shows: effectiveness by direction

Extracorporeal shock wave lithotripsy and ursodeoxycholic acid dissolution of gallstones result in acceptable stone-free rates only in highly selected patients, but do not prevent recurrences or complications. Long-term studies document stone recurrence in 25-64% of patients by 5 years and in 49-80% by 10 years; a third ultimately undergo cholecystectomy. This explains the abandonment of these approaches in routine practice. [9]

For common bile duct stones, peroral cholangioscopy with contact lithotripsy demonstrates a high rate of complete duct clearance. Meta-analyses and randomized trials report successful stone removal in a single procedure in approximately 80-90% of patients, and the overall clinical success rate often exceeds 90%. The choice between electrohydraulic and laser energy depends on equipment and experience; both technologies are considered effective and safe. [10]

Mechanical lithotripsy remains an accessible and cost-effective option, but its effectiveness is lower and multiple sessions are often required, especially for very large stones. If this is unsuccessful, mechanics switch to electrohydraulic or laser energy under cholangioscopy, which increases the chance of complete duct clearance without surgery. [11]

Table 3. Effectiveness of key “fragmentation” strategies

Situation	Method	Evaluation of success based on literature data	Comment
Gallstones	Extracorporeal shock wave lithotripsy plus acids	Low persistence, high relapse rate within 5-10 years	Not recommended for routine use
"Difficult" stones of the channel	Cholangioscopy plus electrohydraulic lithotripsy	Often 80-90% complete cleansing in 1 session	Select by availability
"Difficult" stones of the channel	Cholangioscopy plus laser lithotripsy	Often 85-95% complete clearance, often in 1 session	Efficiency comparable to electro-hydraulic
"Difficult" stones of the channel	Mechanical lithotripsy	About 70-80% overall success, usually several sessions	This could be the first step.
Total for ESGE, ASGE and reviews. [12]

Safety: What to look for

The main risks associated with endoscopic stone treatment are associated with the endoscopic retrograde cholangiopancreatography procedure itself: post-procedural pancreatitis, bleeding, infection, and perforation. Current estimates for the general population place the incidence of pancreatitis at approximately 3-6%, up to 10% or more in high-risk groups, and less than 1% in severe cases. Prevention includes rectal nonsteroidal anti-inflammatory drugs and preemptive pancreatic stenting in selected high-risk patients. [13]

Peroral cholangioscopy with contact lithotripsy carries additional technical risks of energy in the duct lumen; however, the overall incidence of serious adverse events remains moderate and comparable to standard endoscopic retrograde cholangiopancreatography when performed in experienced hands. In registries and observational series, serious complications are rare. [14]

Extracorporeal shock wave lithotripsy for gallstones carries a risk of bruising, pain, transient enzyme elevations, and pancreatitis, and the long-term benefits do not outweigh the risks and costs, leading to recommendations that it should not be used routinely.[15]

Table 4. Common adverse events and their estimated frequencies

Event	What tactics are more common?	Frequency assessment
Post-procedural pancreatitis	Any endoscopic retrograde cholangiopancreatography	On average 3-6%, higher in risk groups
Bleeding after sphincterotomy	Endoscopic stone removal	Low, often treated endoscopically
Cholangitis	In case of incomplete drainage	Low with proper sanitation
Perforation	Rarely, but seriously	Fractions of a percent
Pain, bruising, transient enzymes	Extracorporeal shock wave lithotripsy of the bladder	Varies, not always clinically significant
Collection of recommendations and reviews. [16]

Preparation and implementation

Before choosing a treatment strategy, the location and characteristics of the stones are assessed. For gallbladder stones with symptoms, laparoscopic surgery is planned. If duct stones are suspected, confirmation is achieved with high-precision noninvasive imaging, usually magnetic resonance cholangiopancreatography or endoscopic ultrasound, to avoid unnecessary invasive procedures. [17]

If endoscopic retrograde cholangiopancreatography (ERCP) is required, the risk of postprocedural pancreatitis and bleeding is calculated in advance, and prophylaxis with rectal nonsteroidal anti-inflammatory drugs and the need for a preventive pancreatic stent in high-risk patients are discussed. Anticoagulants and antiplatelet agents are administered according to local protocols, and antibiotics are prescribed for signs of cholangitis or expected incomplete sanitation. [18]

During surgery, standard stone removal techniques include sphincterotomy, balloon extraction, basket extraction, and, for larger stones, dilation of the outlet with a large balloon. If this is unsuccessful, contact lithotripsy under cholangioscopy is used, and upon completion, clearance of the duct is confirmed. [19]

If a patient has both gallstones and stones in the gallbladder, early laparoscopic cholecystectomy is planned after the endoscopic stage to prevent recurrent biliary events. This is a matter of patient management, not a matter of "waiting and waiting for the best." [20]

Table 5. Preparation for intervention: what to check

Stage	For what
Confirm the location of the stones	The tactics depend on this
Assess the risk of post-procedural pancreatitis	Prevention plan and choice of equipment
Adjust anticoagulants and antiplatelet agents	Reduce the risk of bleeding
Think about antibiotics	In case of cholangitis and expected incomplete sanitation
Discuss the plan "endoscopy plus early surgery"	Reduce relapses and hospitalizations
Consolidated by ESGE and EASL. [21]

A Question of Cost and Meaning: Why Crushed Gallstones Are a Thing of the Past

Even when extracorporeal shock wave lithotripsy succeeded in making gallstones invisible on imaging, a significant proportion of patients experienced recurrence of pain and colic, and stones recurred after several years. This often resulted in delayed surgery. This makes the method economically and clinically disadvantageous compared to timely laparoscopic cholecystectomy. [22]

High-quality guidelines emphasize that the goal of therapy is not only to remove the stone but also to prevent complications such as acute cholecystitis, pancreatitis, and cholangitis. From this perspective, timely gallbladder removal during symptomatic gallbladder surgery and complete duct sanitation in the case of gallstones provide predictable protection that neither shockwave gallbladder fragmentation nor long-term courses of bile acid therapy can provide. [23]

Table 6. Recurrence of gallstones after extracorporeal shock wave lithotripsy and dissolution

Observation period	Relapse according to research data
3 years	About 27-33%
5 years	About 41-64%
10 years	About 49-80%
The need for surgery	Up to a third of patients on average after 3 years
Total EASL and prospective data. [24]

Special situations

In severe comorbid conditions that make anesthesia dangerous, the approach is individualized. For gallstones, staged endoscopic drainage with delayed sanitation and subsequent early laparoscopic cholecystectomy is possible when the condition stabilizes. For acute inflammatory conditions of the gallbladder in inoperable patients, percutaneous drainage is used, with subsequent discussion of surgery once improvement occurs. [25]

In cases of repeated failure of endoscopic duct sanitation, advanced approaches are used: large-balloon dilation of the outlet, contact lithotripsy under cholangioscopy, and, if necessary, hybrid strategies involving a surgeon. This allows for the avoidance of major open interventions in most patients. [26]

Table 7. Choice of strategy under different scenarios

Scenario	First line	If it didn't work
Symptomatic gallstones	Laparoscopic cholecystectomy	Mini-laparotomy when laparoscopy is not possible
Canal stones, standard case	Endoscopic retrograde cholangiopancreatography with extraction	Large balloon dilation
"Difficult" stones of the channel	Cholangioscopy plus contact lithotripsy	Repeat session or hybrid surgery
High anesthetic risk	Staged drainage and delay of radical step	Individual consultation
Summary of ESGE, EASL, NICE. [27]

What to ask your doctor and how to prepare

Ask for clarification on the specific location of your stones and the rationale for a specific strategy. Ask if post-procedure pancreatitis prevention is planned and how anticoagulants and antiplatelet medications will be managed. It's important to understand in advance whether a second stage—early laparoscopic cholecystectomy—is necessary and when. [28]

Preparation includes standard tests, a diet according to local regulations, and arrangements for post-sedation care. If signs of infection are present, the doctor will administer antibiotics. If the procedure is performed urgently, some steps will be completed in the hospital upon admission. [29]

Table 8. Short patient checklist

Paragraph	For what
Understand the localization of stones	Determines the choice of method
Discuss pancreatitis prevention	Reduces risks
Coordinate the use of anticoagulants	Reduces bleeding
Clarify the second stage with the gallbladder	Reduces relapses
Arrange for support in advance	Safe exit from the hospital
Summary of guidelines and standards. [30]

Main

Shock wave crushing and acid dissolution of gallstones have given way to laparoscopic cholecystectomy in modern routine surgery due to poor long-term efficacy and high recurrence rates. Contact lithotripsy under peroral cholangioscopy is a powerful tool for difficult stones in the common bile duct and significantly increases the chance of complete duct clearance. The correct strategy is to accurately locate the stones, use the best technique for the area, and promptly perform early gallbladder surgery if indicated. [31]