Browsing by Subject "percutaneous"

Now showing 1 - 3 of 3
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    Initial Experience with Novel Single-Use Disposable Ureteroscopy: A Prospective, Single Arm 90-Day Trial of the Axis Ureteroscope
    (AUA, 2021) Large, Tim; Rivera, Marcelino; Nottingham, Charles; Agarwal, Deepak; Mellon, Matthew; Krambeck, Amy; Urology, School of Medicine
    Introduction: Novel digital disposable ureteroscopes are becoming more commonplace in endourological practices. We trialed the Axis™ single-use ureteroscope, which is distributed within the United States by Dornier MedTech. Our goal was to demonstrate clinical equivalence to our reusable platform and to evaluate the cost-effectiveness of a single-use digital ureteroscope. Methods: We conducted a prospective 90-day trial where all flexible ureteroscopic procedures were completed using the single-use ureteroscope. The cases were monitored for scope failure, scope deficiencies and surgeon satisfaction scores via an immediate postoperative REDCap® survey. We also performed a cost analysis between reusable scopes and the single-use ureteroscope. The cost of the reusable platform included the amortized initial purchase, maintenance and clean processing. Results: Over a 90-day period, we performed 93 flexible ureteroscopy procedures with a single-use ureteroscope, of which 74 were completed using Axis. After controlling for operating room time and disposable items used, the utilization of Axis was associated with an average reduction of $140.31 per case. Extrapolating the per-case savings over an annual case volume, we estimate a total savings of $56,127.15. There were no disposable scope malfunctions. There were 4 (4.3%) cases converted to reusable scopes due to image quality (1), inadequate secondary deflection (2) and a tight ureter (1). Mean±SD score for image quality, mobility and ergonomics was 9.1±1.1, 8.9±1.1, 9.3±1.1, respectively. The 90-day complication rates were equal to our controls. Conclusions: We demonstrated that the Axis single-use digital ureteroscope is equivalent in function to our digital reusable scope and reduced the cost of flexible ureteroscopy.
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    Preoperative Bladder Urine Culture as a Predictor of Intraoperative Stone Culture Results: Clinical Implications and Relationship to Stone Composition
    (Elsevier, 2016-09) Paonessa, Jessica E.; Gnessin, Ehud; Bhojani, Bhojani; Williams, James C.; Lingeman, James E.; Anatomy and Cell Biology, School of Medicine
    Purpose We examine the relationship between urine and stone cultures in a large cohort of patients undergoing percutaneous stone removal and compare the findings in infectious vs metabolic calculi. Materials and Methods A total of 776 patients treated with percutaneous nephrolithotomy who had preoperative urine cultures and intraoperative stone cultures were included in the study. Statistical analysis used chi-square or logistic fit analysis as appropriate. Results Preoperative urine culture was positive in 352 patients (45.4%) and stone cultures were positive in 300 patients (38.7%). There were 75 patients (9.7%) with negative preoperative cultures who had positive stone cultures, and in patients with both cultures positive the organisms differed in 103 (13.3%). Gram-positive organisms predominated in preoperative urine and stone cultures. Conclusions Preoperative urine cultures in patients undergoing percutaneous nephrolithotomy are unreliable as there is a discordance with intraoperative stone cultures in almost a quarter of cases. There has been a notable shift toward gram-positive organisms in this cohort of patients.
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    Preoperative Bladder Urine Culture as a Predictor of Intraoperative Stone Culture Results: Clinical Implications and Relationship to Stone Composition
    (Elsevier, 2016-09) Paonessa, Jessica E.; Gnessin, Ehud; Bhojani, Naeem; Williams, James C.; Lingeman, James E.; Anatomy and Cell Biology, School of Medicine
    Purpose We examine the relationship between urine and stone cultures in a large cohort of patients undergoing percutaneous stone removal and compare the findings in infectious vs metabolic calculi. Materials and Methods A total of 776 patients treated with percutaneous nephrolithotomy who had preoperative urine cultures and intraoperative stone cultures were included in the study. Statistical analysis used chi-square or logistic fit analysis as appropriate. Results Preoperative urine culture was positive in 352 patients (45.4%) and stone cultures were positive in 300 patients (38.7%). There were 75 patients (9.7%) with negative preoperative cultures who had positive stone cultures, and in patients with both cultures positive the organisms differed in 103 (13.3%). Gram-positive organisms predominated in preoperative urine and stone cultures. Conclusions Preoperative urine cultures in patients undergoing percutaneous nephrolithotomy are unreliable as there is a discordance with intraoperative stone cultures in almost a quarter of cases. There has been a notable shift toward gram-positive organisms in this cohort of patients.