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A New Automatically Fixating Stone Basket (2.5 F) Prototype with a Nitinol Spring for Accurate Ureteroscopic Stone Size Measurement

INTRODUCTION: Intraoperative assessment of stone size is crucial for the successful and safe extraction of stones. The first automatically fixating measuring stone basket prototype showed a mismatch between the steel spring and the nitinol basket; therefore, to improve this prototype, the steel spri...

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Autores principales: Cordes, Jens, Nguyen, Felix, Pinkowski, Wolfhard, Merseburger, Axel S., Ozimek, Tomasz
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Healthcare Communications 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6133135/
https://www.ncbi.nlm.nih.gov/pubmed/30078174
http://dx.doi.org/10.1007/s12325-018-0761-6
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author Cordes, Jens
Nguyen, Felix
Pinkowski, Wolfhard
Merseburger, Axel S.
Ozimek, Tomasz
author_facet Cordes, Jens
Nguyen, Felix
Pinkowski, Wolfhard
Merseburger, Axel S.
Ozimek, Tomasz
author_sort Cordes, Jens
collection PubMed
description INTRODUCTION: Intraoperative assessment of stone size is crucial for the successful and safe extraction of stones. The first automatically fixating measuring stone basket prototype showed a mismatch between the steel spring and the nitinol basket; therefore, to improve this prototype, the steel spring was replaced with a nitinol spring and a modified scale was implemented on the basket handle for accurate intraoperative stone size measurement. METHODS: The proposed tipped basket was composed of nitinol. A standard handle with a spring-supported self-closing mechanism (2.5 F, Urotech(®)) was used, and a modified nonlinear millimeter scale was established on the handle. The grasping force was provided by the new nitinol spring mechanism in the handgrip. Various colors associated with the stone size were applied on the scale. RESULTS: The material difference between the basket and the spring was eliminated. The measuring scale ranged from 2 mm (green) through 5 mm (yellow) to 8 mm (red), and the scale was nonlinear because of the nonlinear relationship between the diameter of the stone and the distance marked on the scale. CONCLUSION: The proposed automatically fixating stone basket with a nitinol spring has the potential to improve the safety and effectiveness of endourological stone retrieval. Further validation of this new scale and basket should follow.
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spelling pubmed-61331352018-09-14 A New Automatically Fixating Stone Basket (2.5 F) Prototype with a Nitinol Spring for Accurate Ureteroscopic Stone Size Measurement Cordes, Jens Nguyen, Felix Pinkowski, Wolfhard Merseburger, Axel S. Ozimek, Tomasz Adv Ther Original Research INTRODUCTION: Intraoperative assessment of stone size is crucial for the successful and safe extraction of stones. The first automatically fixating measuring stone basket prototype showed a mismatch between the steel spring and the nitinol basket; therefore, to improve this prototype, the steel spring was replaced with a nitinol spring and a modified scale was implemented on the basket handle for accurate intraoperative stone size measurement. METHODS: The proposed tipped basket was composed of nitinol. A standard handle with a spring-supported self-closing mechanism (2.5 F, Urotech(®)) was used, and a modified nonlinear millimeter scale was established on the handle. The grasping force was provided by the new nitinol spring mechanism in the handgrip. Various colors associated with the stone size were applied on the scale. RESULTS: The material difference between the basket and the spring was eliminated. The measuring scale ranged from 2 mm (green) through 5 mm (yellow) to 8 mm (red), and the scale was nonlinear because of the nonlinear relationship between the diameter of the stone and the distance marked on the scale. CONCLUSION: The proposed automatically fixating stone basket with a nitinol spring has the potential to improve the safety and effectiveness of endourological stone retrieval. Further validation of this new scale and basket should follow. Springer Healthcare Communications 2018-08-04 2018 /pmc/articles/PMC6133135/ /pubmed/30078174 http://dx.doi.org/10.1007/s12325-018-0761-6 Text en © The Author(s) 2018 https://creativecommons.org/licenses/by-nc/4.0/This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) ), which permits any noncommercial use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Original Research
Cordes, Jens
Nguyen, Felix
Pinkowski, Wolfhard
Merseburger, Axel S.
Ozimek, Tomasz
A New Automatically Fixating Stone Basket (2.5 F) Prototype with a Nitinol Spring for Accurate Ureteroscopic Stone Size Measurement
title A New Automatically Fixating Stone Basket (2.5 F) Prototype with a Nitinol Spring for Accurate Ureteroscopic Stone Size Measurement
title_full A New Automatically Fixating Stone Basket (2.5 F) Prototype with a Nitinol Spring for Accurate Ureteroscopic Stone Size Measurement
title_fullStr A New Automatically Fixating Stone Basket (2.5 F) Prototype with a Nitinol Spring for Accurate Ureteroscopic Stone Size Measurement
title_full_unstemmed A New Automatically Fixating Stone Basket (2.5 F) Prototype with a Nitinol Spring for Accurate Ureteroscopic Stone Size Measurement
title_short A New Automatically Fixating Stone Basket (2.5 F) Prototype with a Nitinol Spring for Accurate Ureteroscopic Stone Size Measurement
title_sort new automatically fixating stone basket (2.5 f) prototype with a nitinol spring for accurate ureteroscopic stone size measurement
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6133135/
https://www.ncbi.nlm.nih.gov/pubmed/30078174
http://dx.doi.org/10.1007/s12325-018-0761-6
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