| Περίληψη: | Percutaneous nephrolithotomy (PCNL) is the main method for the treatment of large renal calculi. Renal access is achieved by puncturing the pelvicaliceal system (PCS) under guidance and dilatation of the access route. The aim of the present study is the measurement and evaluation of the radiation dose (RD) to the patient for the nonpapillary PCNL approach at the University Hospital of Patras and the dosimetric comparison with the existing bibliography.
Materials and methods. Sixty patients, undergoing fluoroscopic guided prone PCNL, participated in the study. The dosimetric indices: (i) fluoroscopy time FT, (ii) air-kerma at the patient entrance reference point (Ka,r) and (iii) air kerma-area product (PKA) were recorded from the dose report of the system. The multiplication of PKA value with an appropriately selected conversion coefficient (CC) gave the effective dose (ED) received by the patient.
Results. The mean FT was 3.02 min, ranging from 1.22 to 6.89 min, the mean Ka,r was 26.64 mGy, ranging from 9.36 to 76.48 mGy, as well as the mean PKA was 4.75 Gycm2, ranging from 1.68 to 13.70 Gycm2, and finally the mean ED was 0.95 mSv, ranging from 0.34 to 2.74 mSv.
Conclusions. FT and radiation dose to patient were lower than those values reported in previous studies.
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