Comparative study of 27-gauge and 25-gauge vitrectomy performed as day surgery
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To compare postoperative outcomes of 27-gauge (G) and 25-G vitrectomy conducted as day surgery.
In total, 200 consecutive eyes that underwent primary vitrectomy (27-G in 100 eyes, 25-G in 100 eyes) were analyzed. 27-G vitrectomy was performed using a cut rate of 7500 cpm and 25-G vitrectomy using a cut rate of 5000 cpm.
The 27-G and 25-G groups did not differ significantly in underlying diseases and preoperative Early Treatment Diabetic Retinopathy Study (ETDRS) score. The time required for vitrectomy was significantly longer in the 27-G group (35.3 vs. 29.8 min, P = 0.0013). Postoperative hypotony was observed in 0 and 3 patients, and ocular hypertension in 10 and 14 patients in the 27-G and 25-G groups, respectively, showing more stabilized postoperative ocular pressure in the 27-G group. Gain in ETDRS score was significantly better in the 27-G group (12.1 ± 20.2 letters) compared to the 25-G group (10.0 ± 21.3 letters) (P = 0.0323) at 1 month post-vitrectomy, but not significantly different at 3 and 6 months (P = 0.0686 and 0.0543). Rates of postoperative retinal detachment (1 vs. 1%) and vitreous hemorrhage (2 vs. 3%) were not different between two groups.
27-G vitrectomy requires longer operative time than 25-G, but using the 27-G system results in earlier visual improvement and stabilized ocular pressure.
KeywordsDay surgery Hypotony Ocular hypertension Operative time Postoperative complications 25-Gauge vitrectomy 27-Gauge vitrectomy Visual acuity
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. This retrospective study was approved by the Ethical Committee of the Nihon University School of Medicine (Number 20161203).
Informed consent for performing the procedures was obtained routinely from all the patients included in this study. For this retrospective study, formal consent of individual patients to be included in the study is not required.
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