Analgesic requirements for ESWL treatment. A double blind study

Area of Science:

• Urology
• Anesthesiology
• Nephrology

Background:

• Extracorporeal shock wave lithotripsy (ESWL) is a common procedure for kidney stone treatment.
• Pain management during ESWL is crucial for patient comfort and procedural success.
• The need for analgesia can vary depending on the lithotriptor generation and patient factors.

Purpose of the Study:

• To evaluate the necessity of routine morphine administration for analgesia during ESWL.
• To compare pain levels and analgesic requirements in patients receiving fentanyl versus a placebo during ESWL with a second-generation lithotriptor.

Main Methods:

• A double-blind study involving 56 patients undergoing ESWL with a Siemens Lithostar lithotriptor.
• Patients received either intravenous fentanyl (0.1 mg) or saline as a placebo before treatment.
• All patients received subcutaneous lidocaine and a naproxen suppository prior to ESWL.
• Pain was assessed using a visual analog scale (VAS) at multiple time points during the procedure.

Main Results:

• No significant difference in pain scores (VAS) was observed between the fentanyl and placebo groups.
• The requirement for supplementary analgesics did not differ significantly between the two groups.
• Patient demographics and procedural characteristics were comparable between groups.

Conclusions:

• Routine administration of morphine is unnecessary for pain management during ESWL with the Siemens Lithostar.
• Standard pre-procedural analgesia (lidocaine and naproxen) may be sufficient for most patients.
• Further research could explore optimal analgesic strategies for different lithotriptor technologies.