Abstract
To study the efficacy of extracorporeal shock-wave lithotripsy (ESWL) of pancreatic
duct stones, seventeen patients (mean age: 42 years) with recurrent attacks of abdominal
pain as a result of chronic calcifying pancreatitis were treated with this method.
In all cases, endoscopic removal of the stones proved impossible. When there was fragmentation,
the remaining calculi and fragments either evacuated spontaneously, or attempts were
made to extract them endoscopically, followed by flushing. In 13 patients (76 %),
fragmentation of stones was achieved, and 11 of these patients had dramatic pain relief
directly after ESWL (65 %). However, complete ductal clearance of stones was achieved
in only seven patients (41 %); at the last follow-up (12-59 months after ESWL, mean:
30 months), all seven were free of symptoms. Of the six patients with stone fragmentation
without ductal clearance, three were operated on because of recurrent complaints.
The only complication due to the procedure was an exacerbation of pancreatitis in
one patient, which was treated conservatively. If pancreatic stones cannot be removed
endoscopically, ESWL seems to be preferable to surgery, which may still be performed
in case of failure. It seems important to achieve ductal clearance and not merely
stone disintegration in order to obtain the desired long-term clinical effects.
