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S. Suzuki, H. Bissen-Miyajima, Y. Ohashi, K. Minami; Evaluation of Suctioning Port in Microkeratomes: Comparison of Single and Dual Ports . Invest. Ophthalmol. Vis. Sci. 2003;44(13):2689.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To evaluate the effect of suctioning ports of the microkeratomes on the course of suction, the changes of intraocular pressure (IOP) were compared between single and dual ports. Methods: Suction rings with single and dual ports were made with transparent acrylic acid resin to observe the course of suctioning. Inter-ring design was the same with that of BD K-3000®. Using six porcine eyes, IOP was measured with intra-vein pressure sensor catheter (diameter: 1.2mm, 3.5F) by placing it in the vitreous cavity. The course of the suction was observed through acrylic suction ring and the changes of IOP were recorded simultaneously with a digital video camera. The rise time which was defined as the time to reach 90% of the maximum IOP was measured. For each eye, these measurements were conducted twice for both single and dual ports. Result: In the course of suctioning, the similar behavior was observed with single and dual ports. The initial IOP was 15.4±4.5 mmHg and the increase of the IOP was 99.1±6.1 mmHg with single port and 99.0±6.5 mmHg with dual ports. The rise time was 4.21±0.24 seconds with single port and 4.12±0.33 seconds with dual ports. The IOP changes and rise time were not significantly different between single and dual ports. Conclusion: The number of ports did not affect the course of suctioning and the changes of IOP in our system. Other factors such as the shape of the inter-ring and the vacuum systems should be further investigated.
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