Researchers tested a new medical device called the second-generation CVAC® Aspiration System for removing kidney stones. The study included 30 patients with kidney stones, though only 26 had complete follow-up data at 30 days after the procedure. The device uses a steerable tube inserted through the urinary tract to vacuum out stones.
The main finding was that the system removed an average of 96% of the stone volume. However, when looking at whether patients had zero stone fragments left, only 46% met this strict definition of 'stone-free.' The average leftover stone volume was very small. Two patients developed urinary tract infections after the procedure, but no one needed additional treatment or another procedure.
It's important to be careful with these results because this was a small study with no comparison group. We don't know how this system compares to other stone removal methods. Also, four patients were missing follow-up data, which could affect the results. The study shows this device can remove most stone material, but whether it leads to better patient outcomes than existing options requires larger, comparative studies.
Readers should understand this is early research on a specific medical device. The results are promising for removing stone volume, but the 'stone-free' rate was lower than the clearance rate. Patients with kidney stones should discuss all available treatment options with their urologist.
