INTRAOCULAR PRESSURE CHANGES DURING VITRECTOMY USING CONSTELLATION VISION SYSTEM'S INTRAOCULAR PRESSURE CONTROL FEATURE.
| Autor: | Falabella P; Department of Ophthalmology, Keck School of Medicine, University of Southern California, Los Angeles, California; †Department of Ophthalmology and Visual Sciences, Federal University of São Paulo, São Paulo, Brazil; ‡Department of Ophthalmology, University of Heidelberg, Heidelberg, Germany; and §School of Medicine, Catholic University of Brasília, Brasília, Brazil., Stefanini FR, Lue JC, Pfister M, Reyes-Mckinley J, Koss MJ, Teixeira A, Schor P, Humayun MS |
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| Jazyk: | angličtina |
| Zdroj: | Retina (Philadelphia, Pa.) [Retina] 2016 Jul; Vol. 36 (7), pp. 1275-80. |
| DOI: | 10.1097/IAE.0000000000000911 |
| Abstrakt: | Purpose: To evaluate intraocular pressure (IOP) changes during experimental vitrectomy and the efficacy of Constellation Vision System's IOP control (IOPc) feature in reestablishing baseline pressure. Methods: Using a pressure transducer in freshly enucleated porcine eyes, a broad range of parameters (baseline pressures, aspiration levels, and cut rates) were tested with 23- and 25-gauge probes and IOPc turned ON versus OFF. Results: IOPc turned ON was significantly more effective than IOPc turned OFF in controlling IOP drop and stabilizing pressure during vitrectomy using a wide range of baseline pressures (20-70 mmHg). The 23-gauge system consistently presented a reduced drop from baseline compared with the 25-gauge system. The overall average drop for the 23- and 25-gauge systems was 12.79 mmHg and 21.17 mmHg, respectively. Both gauge sizes reestablished baseline pressure approximately 1.6 seconds after the initial pressure drop generated at the beginning of aspiration. A peak of IOP (overshooting) was observed when the pressure was returning to baseline using both 23- and 25-gauge systems. Conclusion: Using IOPc feature turned ON, 23- and 25-gauge probes were effective in reestablishing and sustaining baseline infusion pressures, although 23-gauge probes showed less IOP fluctuation than did 25-gauge probes. |
| Databáze: | MEDLINE |
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