Extracorporeal shock wave lithotripsy works by transmitting focused acoustic pulses through the body toward a urinary stone. The pulses generate mechanical stress within the stone, producing cracks that expand as treatment continues. Progressive fragmentation creates smaller pieces, which may then pass naturally or be removed, helping address obstruction and restore urinary flow.
Endoscopic laser methods break stones directly rather than generating stress through externally delivered acoustic pulses. This distinction gives clinicians another way to fragment stones when selecting treatment according to stone size, location, composition, anatomy, and patient factors. The resulting pieces may pass naturally or be removed, depending on the clinical situation.
Stone size, location, and composition, together with urinary anatomy and patient factors, guide the choice between available lithotripsy approaches. These variables affect how clinicians can reach or fragment the stone and whether the resulting pieces are likely to pass or require removal. Treatment selection therefore depends on the individual clinical situation rather than one universal technique.
Clinicians select an approach based on the stone and patient, then either direct focused acoustic pulses through the body or use an endoscopic laser to fragment the stone. After fragmentation, smaller pieces can pass naturally or be removed. This workflow aims to restore urinary flow and reduce obstruction and pain while avoiding larger surgical incisions when appropriate.
Lithotripsy may be considered when a urinary stone contributes to obstruction or pain and clinicians need to improve urinary flow. The technique can fragment the stone so pieces pass naturally or can be removed. It may also offer a way to manage the stone while avoiding a larger surgical incision, depending on anatomy and other patient factors.
Successful treatment can reduce obstruction and pain by producing fragments that pass naturally or are removed, potentially restoring urinary flow. However, treatment may leave residual fragments, and bleeding or infection can occur. Some patients may also need repeat treatment, so clinicians evaluate the result and the ongoing clinical situation rather than assuming one session is always sufficient.