[Evaluation of 2 inanimate models to improve percutaneous fluoroscopy-guided renal access time]

Training devices for percutaneous renal access are expensive, have hazardous biological materials, or radiation. Two devices were designed that eliminate some or all of these characteristics (ManiPERC and iPERC).

To compare the improvement in access time to the posterior lower calix with 2 inanimate models in a group of Urology residents.

Quasi-experimental clinical trial with 16 Urology residents to compare the improvement over time of percutaneous renal access by training in 2 inanimate models (iPERC: simulated fluoroscopy and ManiPERC: real fluoroscopy).

Subjects were assigned to one of 2 groups (iPERC and ManiPERC) and a video analysis of all of them was performed before and after 20 training sessions. Both groups improved their access time; with iPERC from 133.88±41.40 to 76±12.62s (p=0.006) and from 176.5±85.81 to 68.75 to 18.40s (p=0.007) with ManiPERC. Comparing iPERC versus ManiPERC there was no difference between them in improving access time (ANCOVA: Model F (1.13)=1.598, p=0.228).

Both models are equivalent in improving skills; however, even though none of them generated bio-waste, the absence of radioactive emissions makes iPERC the more advantageous model.