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Impact of the curve diameter and laser settings on laser fiber fracture

Impact of the curve diameter and laser settings on laser fiber fracture
Impact of the curve diameter and laser settings on laser fiber fracture

OBJECTIVE: To analyze the risk factors for laser fiber fractures when deflected to form a curve, including laser settings, size of the laser fiber, and the fiber bending diameter.

MATERIALS AND METHODS: Single-use 272 and 365 μm fibers (Rocamed®, Monaco) were employed along with a holmium laser (Rocamed). Five different fiber curve diameters were tested: 9, 12, 15, 18, and 20 mm. Fragmentation and dusting settings were used at a theoretical power of 7.5 W. The laser was activated for 5 minutes and the principal judgment criterion was fiber fracture. Every test for each parameter, bending diameter, and fiber size combinations was repeated 10 times.

RESULTS: With dusting settings, fibers broke more frequently at a curved diameter of 9 mm for both 272 and 365 μm fibers (p = 0.037 and 0.006, respectively). Using fragmentation settings, fibers broke more frequently at 12 mm for 272 μm and 15 mm for 365 μm (p = 0.007 and 0.033, respectively). Short pulse and high energy were significant risk factors for fiber fracture using the 365 μm fibers (p = 0.02), but not for the 272 μm fibers (p = 0.35). Frequency was not a risk factor for fiber rupture. Fiber diameters also seemed to be involved in the failure with a higher number of broken fibers for the 365 μm fibers, but this was not statistically significant when compared with the 272 μm fibers (p > 0.05).

CONCLUSION: Small-core fibers are more resistant than large-core fibers as lower bending diameters (<9 mm) are required to break smaller fibers. In acute angles, the use of small-core fibers, at a low energy and long-pulse (dusting) setting, will reduce the risk of fiber rupture.

Journal Article
0892-7790
918-921
Haddad, Mattieu
72e2599d-5829-4751-bc79-d185f23f536f
Emiliani, Esteban
aa8ffdc6-c992-48e4-8623-454e015a3812
Rouchausse, Yann
af20d071-ad70-4eb2-9129-f4a82584d12b
Coste, Frederic
771f14f5-26c5-4dfe-84c9-248a4cf4715f
Doizi, Steeve
78d0331b-2eee-459b-97bd-8e728868211e
Berthe, Laurent
4768fdb0-ceb7-4fc7-b428-bb91ff5e5c9e
Butticé, Salvatore
6ad9c3b3-4e06-43f9-bedf-72d73209768b
Somani, Bhaskar
ab5fd1ce-02df-4b88-b25e-8ece396335d9
Traxer, Olivier
2fa78817-b6f8-4f00-b389-c9c9ddbd01f3
Haddad, Mattieu
72e2599d-5829-4751-bc79-d185f23f536f
Emiliani, Esteban
aa8ffdc6-c992-48e4-8623-454e015a3812
Rouchausse, Yann
af20d071-ad70-4eb2-9129-f4a82584d12b
Coste, Frederic
771f14f5-26c5-4dfe-84c9-248a4cf4715f
Doizi, Steeve
78d0331b-2eee-459b-97bd-8e728868211e
Berthe, Laurent
4768fdb0-ceb7-4fc7-b428-bb91ff5e5c9e
Butticé, Salvatore
6ad9c3b3-4e06-43f9-bedf-72d73209768b
Somani, Bhaskar
ab5fd1ce-02df-4b88-b25e-8ece396335d9
Traxer, Olivier
2fa78817-b6f8-4f00-b389-c9c9ddbd01f3

Haddad, Mattieu, Emiliani, Esteban, Rouchausse, Yann, Coste, Frederic, Doizi, Steeve, Berthe, Laurent, Butticé, Salvatore, Somani, Bhaskar and Traxer, Olivier (2017) Impact of the curve diameter and laser settings on laser fiber fracture. Journal of Endourology, 31 (9), 918-921. (doi:10.1089/end.2017.0006).

Record type: Article

Abstract

OBJECTIVE: To analyze the risk factors for laser fiber fractures when deflected to form a curve, including laser settings, size of the laser fiber, and the fiber bending diameter.

MATERIALS AND METHODS: Single-use 272 and 365 μm fibers (Rocamed®, Monaco) were employed along with a holmium laser (Rocamed). Five different fiber curve diameters were tested: 9, 12, 15, 18, and 20 mm. Fragmentation and dusting settings were used at a theoretical power of 7.5 W. The laser was activated for 5 minutes and the principal judgment criterion was fiber fracture. Every test for each parameter, bending diameter, and fiber size combinations was repeated 10 times.

RESULTS: With dusting settings, fibers broke more frequently at a curved diameter of 9 mm for both 272 and 365 μm fibers (p = 0.037 and 0.006, respectively). Using fragmentation settings, fibers broke more frequently at 12 mm for 272 μm and 15 mm for 365 μm (p = 0.007 and 0.033, respectively). Short pulse and high energy were significant risk factors for fiber fracture using the 365 μm fibers (p = 0.02), but not for the 272 μm fibers (p = 0.35). Frequency was not a risk factor for fiber rupture. Fiber diameters also seemed to be involved in the failure with a higher number of broken fibers for the 365 μm fibers, but this was not statistically significant when compared with the 272 μm fibers (p > 0.05).

CONCLUSION: Small-core fibers are more resistant than large-core fibers as lower bending diameters (<9 mm) are required to break smaller fibers. In acute angles, the use of small-core fibers, at a low energy and long-pulse (dusting) setting, will reduce the risk of fiber rupture.

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More information

e-pub ahead of print date: 6 July 2017
Published date: 1 September 2017
Keywords: Journal Article

Identifiers

Local EPrints ID: 419092
URI: http://eprints.soton.ac.uk/id/eprint/419092
ISSN: 0892-7790
PURE UUID: b823c48c-223c-4e7b-9704-fcafc96240ca

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Date deposited: 29 Mar 2018 16:30
Last modified: 06 Oct 2020 23:55

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