[Comparative studies of the postoperative phase following opioid analgesia using fentanyl and alfentanil within the scope of extracorporeal shockwave lithotripsy].

30 patients (ASA Class I-III) received opioid analgesia with fentanyl and alfentanil for extracorporeal shock wave lithotripsy. Average doses were 0.41 mg for fentanyl and 4.

Opioid analgesia in extracorporeal shock wave lithotripsy: fentanyl versus alfentanil.

More than 1,600 patients have been treated by extracorporeal shock wave lithotripsy (ESWL) under fentanyl analgesia without any complications or severe side-effects. As secondary respiratory depression is still under discussion, we investigated the value of alfentanil--a short-term acting opioid--with special interest in its efficacy and side-effects. Neither fentanyl nor alfentanil significantly influenced blood pressure, respiratory rate and blood gases.