Table 3

Success rates of current GDDs

TypeInvestigatorYearDiagnosisNo of eyesFollw up (months) mean (SD)Definition of success Success
rate
without medication
Success
rate with medications
Molteno
SP and DPMills39 1997Mixed (25% neovascular)7744 IOP ⩽ 22 mm Hg23%34%
SPMermoud40 1993Neovascular6024.7 (13.4)IOP ⩽ 2117%20%
SPHeuer41 1992Mixed (no neovascular)5014.9 (8.9)5 ⩽ IOP ⩽ 2110%40%
DP5216.4 (6.8)12%63%
SPMinckler42 1988Mixed (50% neovascular)9017.6IOP ⩽ 217%40%
AhmedColeman26 1995Mixed609.3 IOP < 22 NANA (78%)
Coleman43 1997Penetrating keratoplasty 3116 IOP < 22 26%39%
Coleman44 1997Paediatric, mixed2416.3 (11.2)IOP < 22 33%38%
Krupin discKrupin Study Group45 1994Mixed5025.4 (2.4)IOP ⩽ 1947%33%
Fellenbaum24 1994Mixed2513.26 ⩽ IOP ⩽ 2128%36%
Baerveldt
200, 250, 350, 500 mm2 Siegner46 1995Mixed10313.6 (0.9)5 ⩽ IOP ⩽ 2245%27%
200, 350, 500 mm2 Sidoti47 1995Neovascular3615.7 (7.2)6 ⩽ IOP ⩽ 2133%17%
350 mm2 Lloyd48 1994Mixed3715.5 (4.8)6 ⩽ IOP ⩽ 2114%70%
500 mm2 3614.1 (5.4)36%47%
  • Molteno SP = Molteno single plate.

  • Molteno DP = Molteno double plates.

  • With no further glaucoma surgery or devastating complication.

  • Without graft failure.

  • Total success rate only.

  • Concurrent or prior.

  • Or reduction of >20% if preoperative IOP >22 mm Hg. Data from same patients may appear in more than one of these three series.

  • Median follow up (months). Mean values not available in these reports, making direct comparison difficult.