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Intraocular pressure changes following 20G pars-plana vitrectomy
Carsten Framme1, Susanne Klotz, Ute E K Wolf-Schnurrbusch
1Department of Ophthalmology, Inselspital, University of Bern, Freiburgstrasse, Bern, Switzerland.
Acta Ophthalmologica
|September 30, 2011
Summary
Short-term intraocular pressure (IOP) monitoring after pars-plana vitrectomy (PPV) is crucial. Silicon oil tamponade poses the highest risk for elevated IOP, especially early post-surgery.
Area of Science:
- Ophthalmology
- Surgical Science
Background:
- Pars-plana vitrectomy (PPV) is a common surgical procedure for various vitreoretinal diseases.
- Monitoring intraocular pressure (IOP) post-PPV is essential for managing potential complications.
Purpose of the Study:
- To investigate the short-term changes in intraocular pressure (IOP) following 20-gauge pars-plana vitrectomy (PPV).
- To analyze the impact of different intraocular tamponades on post-operative IOP fluctuations.
Main Methods:
- A prospective study involving 851 patients undergoing unilateral PPV.
- IOP measurements were taken pre-operatively and at 3, 6, 24, and 48 hours post-surgery.
- Survival analysis was used to assess the cumulative hazard of IOP changes based on tamponade type and time.
Main Results:
- Mean IOP showed a slight elevation post-surgery, peaking at 24 hours (19.7 ± 8.0 mmHg).
- Silicon oil tamponade resulted in the highest mean IOP values, particularly at 3 hours post-surgery.
- Gas tamponade also led to increased IOP, with a peak at 24 hours. The risk of IOP ≥ 30 mmHg within 24 hours was 23.9%.
Conclusions:
- Close IOP monitoring is vital after PPV to prevent unintended elevations, especially with silicon oil use within the first 3 hours.
- Gas tamponades can cause a prolonged IOP increase up to 24 hours post-surgery.
- Significant hypotony (IOP < 5 mmHg for > 6 hours) is a rare complication after 20-gauge PPV.
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