Navigation Links
Information conveyed to urologists regarding laser fiber diameter is incorrect, says new study
Date:9/17/2013

17 September 2013 Neither the total nor the core diameters of laser fibers correspond to the advertised laser fiber diameter, revealed a new study investigating lasers used for urological surgery. Furthermore, there are serious differences between manufacturers of fibers with a supposedly equal diameter.

The new study, conducted by Dr. Peter Kronenberg of Hospital Fernando Fonseca in Amadora, Portugal, and Prof. Olivier Traxer of the Hpital Tenon in Paris, France, aimed to objectively confirm the diameter between laser fibers of supposed equal thickness by different brands.

According to Dr. P. Kronenberg, who recently presented the findings at the 2nd Meeting of the EAU Section of Urolithiasis (EULIS) in Copenhagen, Denmark, urologists need to know the exact technical specifications of the material they use.

"If the information conveyed to them, whether written on a product label or transmitted by an industry representative, is incorrect, their judgments and the decisions they make based on this knowledge may have surgical repercussions," he explained.

"And yet our measurements and survey suggest that most information conveyed to urologists regarding laser fiber diameter is incorrect and that the large majority of industry representatives are not aware of the real diameter of the laser fibers they represent."

The findings should warrant attention from the urological community, as larger than advertised laser fibers influence irrigation flow, visibility, scope deflection and stone retropulsion.

In the course of the study 14 different brand-new laser fibers of 6 leading brands (with advertised diameters of 200, 270, 272, 273, 365, and 400 m, including single use and re-usable fibers) were assessed through light microscopy. Multiple measurements of both the total diameter (including fiber coating) and the fiber core diameter were performed and compared to their respective advertised diameter. A 10% diameter deviation was considered as the maximum tolerance margin to be acceptable due to manufacture procedures. In addition to that, representatives of those brands at the top two major urology congresses were questioned on what the real diameter of their fibers were and if said diameter was the total diameter or only its core.

The total and the core diameters measured were both significantly different from the advertised diameter in all fibers (p<0.00001). If one considers the advertised diameter as the total diameter, none of the fibers had a measured diameter within the 10% tolerance range. The median increase between total diameter and advertised diameter was 85.3% (range 50.7-116.7%), with four of the fibers being more than double as thick as promoted.

If the advertised diameter corresponds to the fiber core diameter, only one fiber respected the 10% margin, the rest of the fibers having a median increase in core diameter of 30.9% (range 16.7-80.1%). The measurement of core diameters of fibers with a supposed equal diameter revealed differences of up to 100 m in core diameter between manufacturers.

"Due to the ever increasing miniaturization of the instruments today, small differences in laser fiber diameter have repercussions on flexibility, irrigation flow and indirectly on visibility and operating time of ureterorenoscopy," commented Kronenberg on the findings. "And we detected differences in all fibers tested, sometimes well over 100%."

Additionally, in the enquiry, 4 out of 12 representatives said the advertised diameter to be the core diameter, acknowledging that the total fiber diameter was thicker than advertised. Only 1 of those 4 representatives admitted that the core diameter of his fibers was in fact bigger than advertised. The majority of representatives promoted the advertised diameter as the total diameter.

Referring to the implications of the study, Kronenberg explained that such large discrepancies found in the course of the study might warrant the researchers to look into other technical specifications of these and other materials used in endourology.

"It is highly necessary to see if the materials we use are in conformity with the provided information and if there are significant inter-manufacturer differences between materials with supposedly equal characteristics."

The study won the Clinical Research Award at the 2nd EULIS.


'/>"/>

Contact: e.starkova@uroweb.org
e.starkova@uroweb.org
31-263-890-680
European Association of Urology
Source:Eurekalert

Related biology news :

1. Better sharing of genetic information in human health
2. Beaumont named to 2013 InformationWeek 500 list of top technology innovators
3. How brain microcircuits integrate information from different senses
4. Scientists discover how brains auditory center transmits information for decisions, actions
5. Oregon Biodiversity Information Center wins 2013 Natureserve Network Collaboration Award
6. Bad decisions arise from faulty information, not faulty brain circuits
7. Enzymes allow DNA to swap information with exotic molecules
8. New checklist brings information about Cucurbitaceae up to date
9. Biometrics Market Research Updates From Global Information
10. EAU Patient Information now available in Spanish and Greek
11. Information Technology improves patient care and increases privacy, MU informatics expert says
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/17/2016)... , Nov. 17, 2016  AIC announces that it has just released a new ... that require high-performance scale-out plus high speed data transfer storage solutions. Photo ... ... ... Setting up a high performance computing ...
(Date:11/15/2016)... Nov 15, 2016 Research and Markets has ... to 2021" report to their offering. ... ... Billion by 2021 from USD 6.21 Billion in 2016, growing at ... Growth of the bioinformatics market is driven by the growing demand ...
(Date:6/27/2016)... 27, 2016 Research and Markets has announced ... report to their offering. ... to grow at a CAGR of 12.28% during the ... on an in-depth market analysis with inputs from industry experts. The ... coming years. The report also includes a discussion of the key ...
Breaking Biology News(10 mins):
(Date:12/5/2016)... ... December 05, 2016 , ... In anticipation of ... lumbar disc production, company President, Jake Lubinski will be traveling to Germany on ... disc in Cologne and Karlsruhe to discuss the benefits of a viscoelastic total ...
(Date:12/5/2016)... WOODCLIFF LAKE, N.J. , Dec. 5, 2016 ... its Phase 3 open-label two-year study of rufinamide, ... of the American Epilepsy Society (AES) held from ... . Analysis of final two-year safety, tolerability and ... therapy with rufinamide experienced similar safety and tolerability ...
(Date:12/4/2016)... DIEGO , Dec. 3, 2016  In five ... of Hematology (ASH) Annual Meeting and Exposition in ... biomedical engineering methods to improve the delivery of life-saving ... These new methods are designed to carry therapies directly ... needed most, which could provide a substantial advantage over ...
(Date:12/2/2016)... Amgen (NASDAQ: AMGN ) and Allergan ... of a Marketing Authorization Application (MAA) to the European Medicines ... ® (bevacizumab). The companies believe this submission is the ... "The submission of ABP 215 to the EMA is ... portfolio," said Sean E. Harper , M.D., executive vice ...
Breaking Biology Technology: