Siegfried Mariacher, Peter Laubichler, M Mariacher, Jascha Wendelstein, Isaak Fischinger, Matthias Bolz,
"Impact of baseline IOP, vacuum, and different docking mechanisms, and their interaction on IOP rise in femtosecond laser-assisted refractive and cataract surgery."
, in Journal of Cataract and Refractive Surgery, Vol. 45, Nummer 12, ELSEVIER SCIENCE INC, STE 800, 230 PARK AVE, NEW YORK, USA, NY, 10169, Seite(n) 1818-1825, 12-2019, ISSN: 0886-3350
Original Titel:
Impact of baseline IOP, vacuum, and different docking mechanisms, and their interaction on IOP rise in femtosecond laser-assisted refractive and cataract surgery.
Sprache des Titels:
Englisch
Original Kurzfassung:
Purpose
To study the intraocular pressure (IOP) variation during vacuum and docking of femtosecond laser application.
Setting
Department for Ophthalmology, Kepler University Hospital, Johannes Kepler University Linz, Austria.
Design
Experimental study.
Methods
Intracameral intraocular pressure (IOP) was monitored in 30 porcine ex vivo models using a dual femtosecond laser platform (VICTUS). Five different baseline IOP levels (10 to 30 mm Hg) were assessed during fluid-filled (liquid) docking, full-contact (applanating) docking, and vacuum application without docking.
Results
Raising the baseline intracameral IOP from 10 to 30 mm Hg increased the IOP from 27.55 mm Hg ± 5.93 (SD) to 56.85 ± 6.10 mm Hg in the fluid-filled docking group, and from 60.91 ± 8.41 mm Hg to 90.11 ± 6.64 mm Hg in the full-contact docking group. The full-contact docking procedure per se (excluding vacuum effect) increased the IOP by 61.7% (+36.58 ± 5.84 mm Hg). In contrast, fluid-filled docking (excluding vacuum effect) raised the IOP by only 3.1% (+0.72 ± 2.71 mm Hg). Each 5 mm Hg reduction of baseline IOP resulted in a mean IOP reduction of 7.33 ± 3.05 mm Hg in the fluid-filled group, and 7.30 ± 6.88 mm Hg in the full-contact docking group (P < .001). Decreasing baseline intracameral IOP from 15 to 10 mm Hg resulted in the highest IOP reduction between all subgroups (P < .01).
Conclusions
Baseline IOP, docking procedures, and vacuum influenced IOP during femtosecond laser application in a synergistic manner. Lowering the baseline intracameral IOP resulted in a significantly lower IOP during fluid-filled docking for cataract surgery and full-contact docking for refractive surgery. Full-contact (applanating) docking resulted in a significantly higher IOP elevation compared with similar IOP values found during fluid-filled (liquid) docking and the application of the suction ring alone without docking.
Sprache der Kurzfassung:
Englisch
Journal:
Journal of Cataract and Refractive Surgery
Veröffentlicher:
ELSEVIER SCIENCE INC, STE 800, 230 PARK AVE, NEW YORK, USA, NY, 10169
Forschungs-