Intraoperative assessment of intraocular pressure in vitrectomized air-filled and fluid-filled eyes
- Authors
- Moon, Chan Hee; Choi, Kyung Seek; Rhee, Mi Ri; Lee, Sung Jin
- Issue Date
- Nov-2013
- Publisher
- Wiley-Blackwell
- Keywords
- intraocular gas; intraocular pressure; pars plana vitrectomy; Tono-Pen
- Citation
- Acta Ophthalmologica, v.91, no.7, pp E524 - E528
- Journal Title
- Acta Ophthalmologica
- Volume
- 91
- Number
- 7
- Start Page
- E524
- End Page
- E528
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/13254
- DOI
- 10.1111/aos.12145
- ISSN
- 1755-375X
1755-3768
- Abstract
- Purpose: To ascertain the difference of intraocular pressure (IOP) measurement between vitrectomized air-filled and fluid-filled eyes. Methods: Thirty-one eyes of 31 consecutive patients who underwent conventional vitrectomy and intraocular gas tamponade were assessed. After vitrectomy, IOP of the fluid-filled eyes was measured by Tono-Pen. Thereafter, fluid-air exchange was performed, and IOP of the air-filled eyes was measured again. The IOP within each fluid- and air-filled eye was varied by selecting settings on the vitrectomy system, from 10 to 50mmHg with 5-mmHg increments. Postoperatively, IOP was assessed by both Tono-Pen and Goldmann applanation tonometry (GAT). Linear and nonlinear regression analyses were conducted between intraoperatively measured Tono-Pen readings and actual IOPs. Bland-Altman plot was used to assess the agreements between postoperatively measured Tono-Pen readings and GAT readings. Results: The discrepancy between Tono-Pen readings and actual IOP in fluid-filled eyes was not significant, except for the profound high pressures over 45mmHg. However, Tono-Pen readings in air-filled eyes were significantly lower than actual IOPs in all ranges, and Tono-Pen increasingly underestimates IOP at higher levels. Intraoperative Tono-Pen readings were correlated significantly with actual IOP and a quadratic equation evidenced the best fit (R-2=0.996). Postoperatively, difference of the measurements between Tono-Pen and GAT was not significant. Conclusion: Tono-Pen and GAT significantly underestimate actual IOP in air-filled eyes. It should be considered that actual IOP would be greater than the measured IOP in gas-filled eyes, even though the IOP is measured as normal.
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Collections - College of Medicine > Department of Ophthalmology > 1. Journal Articles
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