Primary Retinal Detachment

164
the main outcome measures. Patient and surgical characteristics
were mostly homogeneous. The common denominator was that
the detachment might have responded to scleral buckling.
Results
8 Systematic Review of Efficacy and Safety of Surgery
Table 8.3. Scleral buckle and balloon studies
Study Year Number of Second Proliferative
patients surgery vitreoretino-
(total 1854) (total 170) pathy
(total 17)
Oshima [1] 2000 55 9% 4%
Green [61] 1996 162 12% 2%
Kreissig [62] 1992 107 7% 4%
Kreissig [56] 1989 500 7% 0%
McAllister [45] 1988 28 36% 7%
Richard [60] 1987 100 6% n.a. a
Binder [58] 1986 52 4% n.a. a
Schoch [59] 1986 45 7% 2%
O’Connor [55] 1976 50 0% 0%
Lincoff [57, 67] 1972 755 11% 0%
Weighted average 9.1% 0.9%
a Not available
The pooled risk of second surgery for primary vitrectomy was
13.3% (196/1,465), for pneumatic retinopexy 25.2% (484/1,919), and
for segmental buckling 9.1% (170/1,854). The pooled risk of PVR
after vitrectomy was 5.3% (76/1,417), after pneumatic retinopexy
was 6.5% (111/1,697), and after scleral buckling 0.9% (17/1,702)
(Fig. 8.1).