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Intraocular pressure fluctuation during microincision vitrectomy with constellation vision system.
Yoshimi Sugiura1, Fumiki Okamoto, Yoshifumi Okamoto
1Department of Ophthalmology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan.
American Journal of Ophthalmology
|August 27, 2013
Summary
The Alcon Constellation Vision System's intraocular pressure (IOP) control effectively minimizes IOP fluctuations during vitrectomy. Both 23- and 25-gauge systems showed similar IOP stability with this control engaged.
Area of Science:
- Ophthalmology
- Surgical Technology
- Biomedical Engineering
Background:
- Intraocular pressure (IOP) fluctuations during vitrectomy can pose risks.
- Understanding these fluctuations is crucial for surgical safety and patient outcomes.
Purpose of the Study:
- To evaluate intraocular pressure (IOP) variations during specific maneuvers with the Alcon Constellation Vision System.
- To assess the efficacy of the IOP control feature in mitigating these fluctuations.
Main Methods:
- Experimental laboratory investigation using porcine eyes.
- Performed 23- and 25-gauge vitrectomy in vitreous cutting, aspiration, and scleral compression modes.
- Measured IOP with the IOP control setting both on and off.
Main Results:
- The IOP control system significantly attenuated IOP drops during vitreous cutting and aspiration.
- Without IOP control, aspiration led to severe IOP depression (down to 2.2 mm Hg).
- Scleral compression caused rapid IOP spikes (70-100 mm Hg) regardless of IOP control status.
Conclusions:
- The IOP control system effectively reduces intraocular pressure fluctuations during vitrectomy.
- No significant difference in IOP fluctuation was observed between 23-gauge and 25-gauge vitrectomy systems.
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