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Resilience of Disposable Endoscope Optical Fiber Properties after Repeat Sterilization.
MedLine Citation:
PMID:  22894548     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Objective: The PolyScope (Lumenis, Santa Clara, California) is a disposable flexible ureteroscope composed of a single-use flexible catheter and a reusable fiber optic bundle. We tested the resilience of the optical properties of the reusable optical fiber after repeat sterilization. Methods: Optical properties evaluated were resolution, distortion and light transmission. Two different optical fibers were tested, one for each sterilization method. Measurements on each fiber were obtained at baseline and were repeated after each set of ten sterilization cycles for a total of 100 cycles. To measure resolution, the 1951 USAF Contrast Resolution Chart Target was used to subjectively identify the clearest image on the grid by two different operators. To measure distortion, three images of the distortion grid target were captured with a digital camera and analyzed within Image Pro Plus Software. Light transmission was measured using a digital light meter at 50% and 100% transmission. Results: There was no significant difference in resolution after 100 sterilization cycles between either Steris or Sterrad NX. Distortion changed by 8.7% and 11.2% for Steris and Sterrad NX, respectively. For Steris at 100% light transmission, baseline was 59 foot-candles and this increased to 85 foot-candles after 100 cycles. For Sterrad NX at 100% light transmission, baseline was 50 foot-candles and this increased to 92 foot-candles after 100 cycles; results were similar at 50%; there was no significant difference between groups at 50%, 100% or between sterilization modalities. Conclusion: The PolyScope fiber optic bundle appears durable after 100 cycles of sterilization with either Steris or Sterrad NX.
Authors:
Matthew Johnson; Tariq A Khemees; Bodo E Knudsen
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-15
Journal Detail:
Title:  Journal of endourology / Endourological Society     Volume:  -     ISSN:  1557-900X     ISO Abbreviation:  J. Endourol.     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-8-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8807503     Medline TA:  J Endourol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Wexner Medical Center, The Ohio State University, Department of Urology, Columbus, Ohio, United States; matthew.johnson@osumc.edu.
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