Posters

Effect of different preoperative IOP levels on intraoperative IOP rise during liquid immersion full docking and curved applanating full docking for femtosecond laser-assisted surgery

Poster Details

First Author: S.Mariacher AUSTRIA

Co Author(s):    P. Laubichler   J. Wendelstein   M. Mariacher   I. Fischinger   M. Bolz        

Abstract Details

Purpose:

To analyse the effect of the preoperative intraocular pressure (IOP) level in combination with different types of docking mechanisms on intraoperative IOP during the femtosecond laser application for cataract and refractive surgery.

Setting:

Johannes Kepler University Linz, Kepler University Hospital GmbH, Department for Ophthalmology and Optometry, Altenberger Strasse 69, 4040 Linz and Krankenhausstrasse 9, 4020 Linz, Austria

Methods:

In this study, 30 porcine eye models were investigated using 5 different preoperative baseline IOP levels (10, 15, 20, 25 and 30 mmHg) in combination with 3 docking mechanisms (application of the suction ring without docking, full liquid docking and full curved applanating docking). IOP was measured with intracameral manometry prior, during and after docking to the VICTUS femtosecond laser platform (Bausch & Lomb, Technolas Perfect Vision GmbH, Germany).

Results:

IOP during liquid and applanating docking increased significantly when raising IOP by each 5 mmHg level (p<0.001). Preoperative IOP of 10 mmHg resulted in an intraoperative IOP of 27.6±5.9 mmHg during liquid docking and 60.9±8.4 mmHg during applanating docking. In contrast, preoperative IOP of 30 mmHg resulted in an intraoperative IOP of 56.9±6.1 mmHg during liquid docking and 90.1±6.6 mmHg during applanating docking. Reducing the baseline IOP by 5 mmHg resulted in a mean IOP reduction of 7.3±3.1 mmHg in the liquid docking group, and 7.3±6.9 mmHg in the applanating docking group (p<0.001).

Conclusions:

The preoperative IOP and the type of docking mechanism influenced IOP during femtosecond laser application in a synergistic manner. In both docking groups lowering baseline IOP resulted in a significant lower IOP during laser application. Preoperative IOP reduction could potentially reduce IOP in patients sensible to IOP spikes.

Financial Disclosure:

None