Journal List > J Korean Ophthalmol Soc > v.57(10) > 1010430

Lee, Kwon, Park, Park, Byon, and Lee: Prognostic Factors of Anatomical Success in Microincisional Vitrectomy for Rhegmatogenous Retinal Detachment

Abstract

Purpose

To determine the prognostic factors of primary anatomical success after microincisional vitrectomy for rhegmatogenous retinal detachment (RRD).

Methods

The medical records of 206 eyes treated with microincisional vitrectomy for RRD from 2009 to 2014 were retrospectively reviewed. The preoperative factors (best corrected visual acuity, break sites, number of breaks, break size, extent of retinal detachment, high myopia, lens status) and intraoperative factors (combined cataract surgery, vitrectomy machine, tamponade, sclerotomy size) were investigated to determine correlations with primary anatomical success.

Results

Of the 206 eyes, 198 eyes (96.1%) were reattached after primary vitrectomy; 46 eyes of 48 eyes with inferior breaks (95.8%, p = 1.000), 42 eyes of 44 pseudophakic eyes (95.5%, p = 1.000), 84 eyes of 89 eyes with multiple breaks (95.4%, p = 0.296). All 39 eyes using air tamponade (100%, p = 0.224) were reattached and there was no significant correlation with primary anatomical success. Conversely, 44 eyes of 49 eyes with high myopia (89.8%) were reattached after primary surgery, which was lower than non-high myopic eyes (98.1%, p = 0.028). Multivariate logistic regression showed that high myopia was an independent factor for primary reattachment failure (odds ratio = 5.795, 95% confidence interval = 1.332–25.208, p = 0.019).

Conclusions

Microincisional vitrectomy for RRD showed a high reattachment rate regardless of break site and number, lens status, or tamponade type. However, primary reattachment failure was relatively common in high myopia patients, thus, meticulous care is required.

References

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Table 1.
Baseline characteristics
  Patients
Number of Eyes 206
Age (year) 56.4 ± 10.8
Male:Female 130:76
Right:Left 64:142
Best corrective visual acuity (log MAR) 1.40 ± 1.06
Axial length (mm) 24.991 ± 1.963
Macula on:off 67:139
Lens status at surgery (phakic:pseudophakic) 162:44
Site of retinal breaks (Superior:Middle:Inferior) 126:32:48
Number of retinal breaks 1.8 ± 1.3
Size of retinal breaks (disc diameter) 1.62 ± 1.26
Extent of retinal detachment (hour) 4.96 ± 2.04

Values are presented as mean ± SD unless otherwise indicated.

Table 2.
Operative methods
  Patients
Combined with cataract surgery 146/162 (90.1)
Tamponade  
   SF6 111 (53.9)
   C3 F8 43 (20.9)
   Room air 39 (18.9)
   Silicone oil 13 (6.3)
Incision size (gauge)  
   23 153 (74.3)
   25 53 (25.7)
Vitrectomy machine  
   ACCURUS® 127 (61.7)
   Constillation® 79 (38.3)

Values are presented as n (%).

Table 3.
Correlation between variables with primary reattachment rate
  Success Fail p-value
Gender     0.451*
   Male 131 (97.0) 4 (3.0)  
   Female 67 (94.3) 4 (5.7)  
BCVA at first visit (log MAR)     1.000*
   <1.40 100 (96.1) 4 (3.9)  
   ≥1.40 98 (96.1) 4 (3.9)  
Macula status     0.241*
   Off 132 (95.0) 7 (5.0)  
   On 66 (98.5) 1 (1.5)  
Lens     0.569*
   Phakic 156 (96.3) 6 (3.7)  
   Pseudophakic 42 (95.5) 2 (4.5)  
High myopia     0.028*
   No (<26 mm) 154 (98.1) 3 (1.9)  
   Yes (≥26 mm) 44 (89.8) 5 (10.2)  
Number of breaks     0.519*
   <2 114 (97.4) 3 (2.6)  
   ≥2 84 (94.4) 5 (5.6)  
Site of breaks     0.292*
   Other than no Inferior breaks 152 (96.2) 6 (3.8)  
   Inferior breaks 46 (95.8) 2 (4.2)  
Gauge     0.962*
   23 147 (96.1) 6 (3.9)  
   25 51 (96.2) 2 (3.8)  
Equipment     0.960*
   ACCURUS® 122 (96.1) 5 (3.9)  
   Constillation® 76 (96.2) 3 (3.8)  
Tamponade     0.137
   Air 39 (100.0) 0 (0.0)  
   Gas 147 (95.5) 7 (4.5)  
   Silicone oil 12 (92.3) 1 (7.7)  

Values are presented as n (%).

BCVA = best corrected visual acuity.

* Chi-squre test

Linear by linear association.

Table 4.
Multivariate logistic regression of risk factors for surgery success
  OR 95% CI p-value
High myopia (no vs. yes) 5.79 1.33 to 25.21 0.019

OR = odds ratio; CI = confidence interval.

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