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. 2023 Mar-Apr;39(2):439-443.
doi: 10.12669/pjms.39.2.6243.

Comparison of residual silicone oil index after removal of silicone oil with fluid-air versus oil-fluid exchange

Amna Rizwan  1 , Rana Muhammad Mohsin Javaid  2 , Sidrah Latif  3 , Muhammad Suhail Sarwar  4 , Asad Aslam Khan  5
Affiliations

Comparison of residual silicone oil index after removal of silicone oil with fluid-air versus oil-fluid exchange

Amna Rizwan et al. Pak J Med Sci. 2023 Mar-Apr.

Abstract

Objectives: To compare the effectiveness of fluid-air exchange with silicone oil-fluid exchange in reducing the residual silicone oil (SO) droplets after the removal of SO.

Methods: This was a prospective, quasi-experimental study conducted from October 2021 to February 2022 at Eye Unit-III, COAVS, Mayo Hospital, Lahore. Sixty-one patients with siliconized eyes underwent removal of SO with two different techniques and were divided into fluid-air exchange and oil-fluid exchange groups. To quantify the residual silicone droplets objectively, B-scan echographic images were analyzed within seven days of surgery. Silicone oil index (SOI) which is the amount of residual SO droplets/vitreal area in the images was calculated with the help of imagej software.

Results: The residual SOI of the fluid-air exchange group (0.99 ± 1.76%) was significantly lower than the oil-fluid exchange group (3.25 ± 3.85%). The SOI is positively correlated with the duration of tamponade, preoperative intraocular- pressure and axial length. Persistent IOP elevation post-operatively was seen in 16.67% individuals in the fluid-air exchange group and 54.8% individuals in the oil-fluid exchange group.

Conclusion: Fluid-air exchange group was found to be superior in reducing residual SO droplets than the oil-fluid exchange group.

Keywords: B-scan; Fluid-air exchange; Imagej software; Oil-fluid exchange; Silicone oil; Silicone oil index.

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Figures

Fig.1
Fig.1
Representation of image processing using imageJ software to quantify residual SO droplets. a. Ultrasound B-scan image of a patient. b. Binarization of the image to highlight signals from the residual SO droplets in “color threshold” mode. c. vitreous cavity area was demarcated. d. Image showing number and area of residual SO droplets.
See this image and copyright information in PMC

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