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01-10-2020 | Cataract | Original Paper

Stability of a non-applanating handheld liquid patient interface for femtosecond laser-assisted cataract surgery

Authors: Karl Thomas Boden, Martina Mariacher, Kai Januschowski, Katrin Boden, Annekatrin Rickmann, Peter Szurman, Berthold Seitz, Siegfried Mariacher

Published in: International Ophthalmology | Issue 10/2020

Abstract

Purpose

A stable and reliable vacuum is crucial for the correct planning and performance of femtosecond laser-assisted cataract surgery (FLACS) in order to avoid complications such as suction loss and cyclorotation. This study investigates, for the first time, the impact of different vacuum levels on the stability of the application of a liquid patient interface for FLACS in view of break-away forces.

Methods

Break-away forces were measured using a multifunctional material testing machine with a mounted digital manometer. Sixteen porcine eyes were docked to the patient interface of a femtosecond laser platform (FEMTO LDV Z8), and the impact of different vacuum levels between 300 and 500 mbar investigated.

Results

Mean break-away forces for each vacuum level were as follows: 1.78 N (± 0.58 N) for 300 mbar; 2.24 N (± 0.68 N) for 350 mbar; 2.66 N (± 0.68 N) for 400 mbar; 2.86 N (± 0.77 N) for 420 mbar; and 3.49 N (± 0.86 N) for 500 mbar.

Conclusion

The stability increases with the vacuum in a nearly linear manner. Vacuum levels higher than 500 mmHg and lower than 350 mmHg are not recommended for FLACS.

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Title: Stability of a non-applanating handheld liquid patient interface for femtosecond laser-assisted cataract surgery
Authors: Karl Thomas Boden
Martina Mariacher
Kai Januschowski
Katrin Boden
Annekatrin Rickmann
Peter Szurman
Berthold Seitz
Siegfried Mariacher
Publication date: 01-10-2020
Publisher: Springer Netherlands
Keywords: Cataract
Laser
Published in: International Ophthalmology / Issue 10/2020
Print ISSN: 0165-5701
Electronic ISSN: 1573-2630
DOI: https://doi.org/10.1007/s10792-020-01450-0

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Stability of a non-applanating handheld liquid patient interface for femtosecond laser-assisted cataract surgery

Abstract

Purpose

Methods

Results

Conclusion

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Abstract

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