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All cases were performed for upper urinary tract stones. Primary outcomes measures included: SFR, length of stay, urosepsis rates and complications. We quantify the increase in flow generated by the giving set on a laboratory based bench test model. We define the effect of flexible URS instrumentation (Optical Integrity ScopeSafe? 200��m https://en.wikipedia.org/wiki/Chlormezanone laser fibre and a Coloplast no-tip1.5F Nitinol basket) on pump flow characteristics. Flow tests were run five times to ensure accuracy. Statistical analysis was performed using One-way ANOVA (nonparametric) testing with GraphPad Prism?. Results:?86 patients underwent flexible URS for upper tract stones. Mean stone size was 10?mm (2�C31?mm). Overall SFR was 91.8%, with 3 patients (3.3%) requiring a second flexible URS procedure. With intra-renal stone 15?mm. Median length of stay for flexible URS was 1 day (0�C22 days). Two patients (2%) developed postoperative urosepsis, one required inotropes and renal supportive treatment. Other complications include: postoperative colic (2%), acute urinary retention (1%) and haematuria requiring readmission (1%). Significant improvements in flow properties were demonstrated with the pump system. Flow rates (mL/min) increased by 55�C62% for standard flexible URS without instrumentation, 73�C95% for a 200��m Integrity ScopeSafe? laser fibre and 126�C173% with a 1.5F Coloplast Nitinol basket in the scope (all significant P? http://www.selleckchem.com/products/Nolvadex.html arthroscopy giving set with a built in pump we achieved good SFR. The rate of urosepsis was low, with no increased morbidity. Flow study tests demonstrate the device delivers a significant improvement in flow rates with instrumentation (200��m laser fibre or 1.5F Nitinol basket). This data supports the hypothesis that the http://www.selleckchem.com/products/Fludarabine(Fludara).html giving set offers a safe and effective modality to help improve vision and achieve good SFR during flexible URS. 116 What is the appropriate size of basket for use in flexible ureterorenoscopy? N.J. RUKIN, K. WILLIAMS and A. WRIGHT Royal Wolverhampton Hospital, Wolverhampton, United Kingdom Introduction:?Advances in flexible ureterorenoscopy (URS) technology have enabled larger stones to be treated via a retrograde approach. Despite this, irrigation flow rate and scope deflection has a significant effect on the success of flexible URS. We aim to determine what size of Nitinol basket offers the user the best flow rate, without compromising scope deflection. Patients and Methods:?We performed a laboratory based bench test to determine the effect of four commonly used intra-renal Nitinol baskets (1.3F, 1.5F, 1.9F, 2.2F). All testing was performed using both a Flex XC? and Flex X2? flexible ureterorenoscopes (Karl Storz, Germany). The length of basket protrusion (1?cm) and height of the saline irrigation fluid (1 metre) were constant.