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Porcine Model to Evaluate Real-Time Intraocular Pressure During Femtosecond Laser Cataract Surgery

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Ibarz, Marta and Hernández Verdejo, José Luis and Bolívar de Miguel, Gema and Tañá Rivero, Pedro and Rodríguez Prats, José Luis and Teus Guezala, Miguel Ángel (2016) Porcine Model to Evaluate Real-Time Intraocular Pressure During Femtosecond Laser Cataract Surgery. Current Eye Research, 41 (4). pp. 507-512. ISSN 0271-3683

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Official URL: http://dx.doi.org/10.3109/02713683.2015.1023459



Abstract

Purpose: To investigate the changes in intraocular pressure (IOP) in porcine eyes during femtosecond laser-assisted cataract surgery using a liquid-optic interface system.
Materials and methods: Femtosecond laser cataract surgery with the Catalys™ was performed on freshly enucleated porcine eyes in Oftalvist Moncloa, Madrid, Spain. Capsulorhexis and lens fragmentation were completed in all the eyes without complications. IOP was measured with a reusable blood pressure transducer connected by direct cannulation to the anterior chamber, recording data before suction (basal), at the beginning of the suction phase, every five seconds during femtosecond procedure and after the removal of the suction ring from the eye.
Results: Nine porcine eyes were used in this study. Basal IOP before suction was 5.67 ± 2.39 mmHg, rising to 20.33 ± 4.18 mmHg at the beginning of the suction phase (p < 0.001). During femtosecond procedure, pressure reached a value of 19.74 ± 4.31 mmHg, remaining stable during the entire process. The IOP recorded prior to removal of the suction ring was 21.00 ± 6.93 mmHg, returning to basal values in all the eyes after the suction ring was removed, with no statistical differences between basal and post-suction IOPs. Total femtosecond procedure time was 125.9 ±  15.9 s.
Conclusions: Real-time IOP can be measured during surgery using a transducer connected to the anterior chamber. The results showed a significant increase in IOP during the procedure due to the pressure exerted by the suction ring but not by the effect of the femtosecond laser.


Item Type:Article
Additional Information:

Received 28 Oct 2014, Accepted 22 Feb 2015, Published online: 27 May 2015

Uncontrolled Keywords:Cataract; Femtosecond laser; Intraocular pressure; Porcine model
Subjects:Medical sciences > Medicine > Ophtalmology
Medical sciences > Optics > Lasers
ID Code:42267
Deposited On:27 Apr 2017 07:43
Last Modified:27 Apr 2017 07:43

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