Operator experience and adequate anesthesia improve treatment outcome with third-generation lithotripters

Area of Science:

• Urology
• Medical Devices
• Nephrology

Background:

• The transition to new medical technology, such as the Dornier U/50 lithotripter, can present challenges in clinical practice.
• Operator experience and anesthetic management are critical factors influencing treatment efficacy.

Purpose of the Study:

• To evaluate the impact of operator experience and anesthesia type on treatment outcomes during the adoption of the Dornier U/50 lithotripter.
• To compare the effectiveness of the new lithotripter with the previous Dornier HM3 model.

Main Methods:

• A cohort of 370 patients undergoing lithotripsy was divided into two groups based on treatment timing (initial 3 months vs. last 3 months with the new device).
• Changes in focusing technique, anesthesia, coupling, and shockwave delivery were implemented over a 6-month period.
• Treatment success was defined as complete stone clearance or fragments < 3 mm at 1-month follow-up.

Main Results:

• The later treatment group (Group II) demonstrated significantly higher stone treatment success rates (78%) compared to the initial group (Group I) (51%).
• Group II patients received general or regional anesthesia more frequently (100%) than Group I patients (52%), with a notable increase in spinal anesthesia use.
• Despite larger upper ureteral stones in Group II, the success rate was superior, indicating improved treatment effectiveness.

Conclusions:

• The transition to the Dornier U/50 lithotripter requires careful attention to anesthetic management and technique optimization.
• Adequate anesthesia to minimize patient movement and optimized balloon pressures are crucial for accurate stone targeting and successful clearance rates.
• Successful adoption of advanced lithotripsy technology depends on addressing both technical and patient-related factors.