[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100650022":3},{"organization":4,"armGroups":7,"interventions":24,"overallOfficials":39,"centralContacts":43,"locations":52,"responsibleParty":68,"collaborators":70,"id":75,"slug":76,"hasResults":77,"nctId":78,"briefTitle":79,"officialTitle":80,"acronym":30,"eligibilityCriteria":81,"healthyVolunteers":77,"sex":82,"minAge":83,"maxAge":30,"enrollmentInfo":84,"targetDuration":30,"studyType":87,"phases":88,"briefSummary":90,"conditions":91,"keywords":93,"overallStatus":100,"whyStopped":30,"lastUpdateSubmitDate":101,"lastUpdatePostDateStruct":102,"startDateStruct":105,"completionDateStruct":107,"leadSponsor":109,"locationsCount":110},{"fullName":5,"class":6},"Haukeland University Hospital","OTHER",[8,14,19],{"label":9,"type":10,"description":11,"interventionNames":12},"Group 1 - Sheathless URS, low power","EXPERIMENTAL","Sheathless URS using low power laser settings (4-6W), short pulse: 0.4 - 0.5J at 10 or 20Hz, or 0.6 - 0.8J at 10Hz",[13],"Procedure: Sheathless URS",{"label":15,"type":10,"description":16,"interventionNames":17},"Group 2 - FANS, low power","URS with FANS using low power laser settings (4-6W), short pulse: 0.4 - 0.5J at 10 or 20Hz, or 0.6 - 0.8J at 10Hz",[18],"Procedure: FANS, low power",{"label":20,"type":10,"description":21,"interventionNames":22},"Group 3 - FANS, high power","URS with FANS using high laser power (16-24W), short pulse: 0.4 - 0.5J at 40Hz, 0.6J at 30 - 40Hz, or 0.8J at 20 - 30Hz",[23],"Procedure: FANS, high power",[25,31,35],{"type":26,"name":27,"description":28,"armGroupLabels":29,"otherNames":30},"PROCEDURE","Sheathless URS","Sheathless URS using low laser power (4-6W), short pulse: 0.4 - 0.5J at 10 or 20Hz, or 0.6 - 0.8J at 10Hz. Standard start-up settings: 0.4J\u002F10Hz (4W)",[9],null,{"type":26,"name":32,"description":33,"armGroupLabels":34,"otherNames":30},"FANS, low power","Sheathless URS using low laser power (4-6W), short pulse: 0.4 - 0.5J at 10 or 20Hz, or 0.6 - 0.8J at 10Hz. Standard start-up settings: 0.6J\u002F10Hz (6W)",[15],{"type":26,"name":36,"description":37,"armGroupLabels":38,"otherNames":30},"FANS, high power","URS with FANS using high laser power (16-24W), short pulse: 0.4 - 0.5J at 40Hz, 0.6J at 30 - 40Hz, or 0.8J at 20 - 30Hz. Standard start-up settings: 0.4J\u002F40Hz (16W)",[20],[40],{"name":41,"affiliation":5,"role":42},"Øyvind Ulvik","PRINCIPAL_INVESTIGATOR",[44,49],{"name":45,"role":46,"phone":47,"phoneExt":30,"email":48},"Øyvind Ulvik, MD, PhD, Professor","CONTACT","+4790918595","doc.ulvik@online.no",{"name":50,"role":46,"phone":30,"phoneExt":30,"email":51},"Mathias S Æsøy, MD, PhD","mathias.asoy@gmail.com",[53],{"facility":5,"status":30,"city":54,"state":55,"zip":56,"country":57,"countryCode":58,"cosmosGeoPoint":59,"geoPoint":64,"contacts":65},"Bergen","Vestland","5021","Norway","NO",{"type":60,"coordinates":61},"Point",[62,63],5.32415,60.39299,{"lat":63,"lon":62},[66,67],{"name":45,"role":46,"phone":47,"phoneExt":30,"email":48},{"name":50,"role":46,"phone":30,"phoneExt":30,"email":51},{"type":69,"investigatorFullName":30,"investigatorTitle":30,"investigatorAffiliation":30,"oldNameTitle":30,"oldOrganization":30},"SPONSOR",[71,73],{"name":72,"class":6},"University Hospital, Akershus",{"name":74,"class":6},"The Hospital of Vestfold","100650022","ureteroscopic-lithotripsy-for-renal-stones-using-a-sheathless-approach-or-using-a-flexible-and-navigable-ureteral-access-sheath-fans-100650022",false,"NCT07741084","Ureteroscopic Lithotripsy for Renal Stones Using a Sheathless Approach or Using a Flexible and Navigable Ureteral Access Sheath (FANS)","FANS vs Sheathless URS Lithotripsy - a Prospective, Randomised Clinical Trial","Inclusion Criteria:\n\n* Patients ≥ 18 years scheduled for URS lithotripsy for renal stones, 8-25 mm, at the day surgery unit at Haukeland University Hospital, Akershus University Hospital and The Hospital of Vestfold\n\nExclusion Criteria:\n\n* Concomitant ureteral stone\n* Urinary diversion\n* Active infection\n* Untreated cancer in the upper urinary tract","ALL","18 Years",{"count":85,"type":86},225,"ESTIMATED","INTERVENTIONAL",[89],"NA","The primary aim of the study is to compare stone free rates following ureteroscopic (URS) lithotripsy for renal stones with Thulium Fiber Laser (TFL) using a sheathless approach (low power laser settings) or using a flexible and navigable ureteral access sheath (FANS) with either low power or high power laser settings. Secondary aims are to compare the results of sheathless- and FANS assisted URS lithotripsy in terms of operative time, laser time, intraoperative and postoperative complications. Following the primary comparison between sheathless and FANS groups, another aim is to compare the outcome of low power and high power URS lithotripsy in the FANS patients with respect to operative time, SFR, laser time, intraoperative and postoperative complications.\n\nPatients ≥ 18 years with renal stones (8-25 mm) scheduled for URS lithotripsy at the Day Surgery Clinic at Haukeland University Hospital in Bergen, Akershus University Hospital and The Hospital of Vestfold - all renal stone centres in Norway, are eligible for inclusion in the study. After written consent and inclusion, patients are randomised to laser lithotripsy using one of three alternative ureteroscopic approaches: Group 1: Sheathless URS using low power TFL 4 -10 Watts, short pulse mode, Group 2: URS with FANS using low power TFL 4 - 10 Watts, short pulse mode or Group 3: URS with FANS using high power TFL 16 - 24 Watts, short pulse mode. The ureteroscopic procedures are performed in general anaesthesia using a standardised technique. All patients are followed up with a low dose CT scan 3 months post endoscopically to assess stone free status as well as a consultation at the outpatient clinic. Results and data for the three randomisation groups are compared according to the aims of the study.",[92],"Renal Stones",[94,95,96,97,98,99],"URS lithotripsy","TFL","Sheatless URS","FANS","low power laser settings","high power laser settings","NOT_YET_RECRUITING","2026-07-28",{"date":103,"type":104},"2026-08-03","ACTUAL",{"date":106,"type":86},"2026-08-15",{"date":108,"type":86},"2027-06-30",{"name":5,"class":6},1]