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- W4386119800 abstract "Abstract Purpose This study is aimed to determine whether postoperative low dose computed tomography (LDCT) imaging is necessary after percutaneous nephrolithotomy (PCNL), or the surgeon's intraoperative assessment of residual fragments (RF) is sufficient and avoidance of postoperative imaging with reduction of radiation exposure can be achieved. Methods Data of all 610 patients who underwent PCNL in prone position in our institution from February 2009 to September 2020 was collected. Parameters such as age, gender, BMI, ASA-Classification, stone related parameters and the surgeon’s assessment of stone-free status were analyzed. The LDCT performed postoperatively was compared to the intraoperative assessment of the surgeon regarding RF. Results The mean age of patients was 52.82 years; the mean BMI was 28.18 kg/m 2 . In 418 cases, the surgeon made a clear statement about the presence of RF and postoperative LDCT was carried out. The discrepancy between the two methods (surgeon´s assessment vs. LDCT) was significant at p < 0.0001. The sensitivity, specificity, positive and negative predictive value of the surgeon when assessing RF were 24.05%, 99.45%, 98.28% and 50%. Stone free rate (SFR) after primary PCNL was 45.57%. The overall SFR at discharge was 96.23%. Conclusion Although the surgeon´s assessment of RF was reliable, postoperative LDCT imaging should still be performed if endoscopic stone clearance is suspected due to the high false negative rate and the low negative predictive value. The optimal timing of postoperative imaging following PCNL remains unclear." @default.
- W4386119800 created "2023-08-25" @default.
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- W4386119800 date "2023-08-24" @default.
- W4386119800 modified "2023-09-25" @default.
- W4386119800 title "Comparison of endoscopic versus CT assessment of stone-free status after percutaneous nephrolithotomy (PCNL)" @default.
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- W4386119800 doi "https://doi.org/10.21203/rs.3.rs-3278376/v1" @default.
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