Introduction: Percutaneous approach to the kidney is a very useful alternative
in renal surgery which minimizes the morbidity of a variety of procedures. Objectives: To evaluate the efficacy,
practicity of a reusable system of metallic coaxial dilator coupled to a special
puncture needle to perform lumbar puncture and dilation of the percutaneous
tract. Methods: A randomized
experimental study was carried out involving 50 individuals. These
patients were randomized as follows: Group 1 had the procedure performed with
the conventional disposable Amplatz set traditionally used for this procedure.
Patients in Group 2 were operated utilizing the new reusable coaxial set
specially designed for this purpose. The following parameters were measured to
compare the 2 groups: sex Corporeal Mass Index (CMI), Pre and postoperative
hematocrit and hemoglobin. Time interval between the puncture, dilation and
access to the renal pelvis and insertion of the nephroscope were also analyzed. Results: There was no statistical
difference between the 2 groups concerning hematocrit and hemoglobin changes
when comparing prewith postoperative period. Patients in Group 2 required a significant
lower time between puncture and final access to the upper collecting system. Conclusion: The new coaxial dilator setshowed to be
as safe as the conventional Amplatz set with the advantage of reusability and decrease of
tract
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