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

Background: 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).

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

Material And Methods: 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).

Results: 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).

Conclusions: 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.