Durability of Flexible Ureteroscopes and Causes of Infection During Flexible Ureterorenoscopy

Study Overview
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Brief Summary
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This is an observational study in which data on consecutive patients who undergo ureterorenoscopy with the use of a flexible ureterorenoscope are collected. In total 20 new ureteroscopes are usedfrom Olympus andfrom Storz) to study the durability of the ureteroscopes and the possible microbiological load.

Detailed Description
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This is an observational study in which data on consecutive patients who undergo ureterorenoscopy with the use of a flexible ureterorenoscope are collected. In total 6 new ureteroscopes are used (3 from Olympus and 3 from Storz) to study the durability of the ureteroscopes and the possible microbiological load. Before the procedure is started the endoscope is tested for its microbiological load in two different ways:1. Shake the tip of the flexible ureterorenoscope 5 seconds in a sterile container filled with 10 cc of NaCl 0.9% 2. Flush the working channel of the ureterorenoscope with 10 cc of NaCl 0.9% and collect the sample in a sterile container. After the procedure is finished, the endoscope is tested for its microbiological load in two different ways: 1. Shake the tip of the flexible ureterorenoscope 5 seconds in a sterile container filled with 10 cc of NaCl 0.9% 2. Flush the working channel of the ureterorenoscope with 10 cc of NaCl 0.9% and collect the sample in a sterile container. Transfer all samples to the lab as soon as possible but at least within four hours after collecting the samples. As for the clinical efficacy during each procedure a detailed questionnaire about the use of each ureteroscope is filled out. This includes the ease of use making mention on quality of the image, torque, flexibility and durability. Data will be collected through electronic case report forms (eCFRs), with use of an online Data Management system (DMS).

Official Title
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Durability of Flexible Ureteroscopes and Causes of Infection During Flexible Ureterorenoscopy

Conditions
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Kidney Stones

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patient presented with a diagnosis to undergo a ureterorenoscopy using a flexible ureterorenoscope over 18 years has signed informed consent the patient is being treated with the designated flexible ureterorenoscope

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Microbiological load | To evaluate the pre-operative microbiological load of the tip and the working channel of the most common used flexible ureteroscopes, after high level disinfection | 2 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Durability | To evaluate the durability of the most common used flexible ureteroscopes in terms of number of procedures, total use time and total degrees of flexibility loss until the first repair is needed. | 2 years | 
| Factors affecting durability | To evaluate descriptive data on factors that may affect the durability of the flexible ureteroscopes. Factors measured are treatment time, treatment indication and anatomical location in the urinary tract, method of ureteroscope insertion number and type of accessory instrumentation through the working channel, difference in users, number of forcing the scope during the procedure and the number of disinfections. | 2 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Microbiological burden, kidney, stone, durability of flexible endoscopes