title: Long term comparison between single stage Baerveldt and Ahmed glaucoma implants in pediatric glaucoma.
abstract: OBJECTIVE
  To compare the long term intraocular pressure control in pediatric glaucoma patients who underwent single stage Baerveldt glaucoma valve and Ahmed glaucoma valve S2 implantation.
  
  
  METHODS
  A retrospective study was conducted to analyze the data of patients with single stage Baerveldt glaucoma valve and Ahmed valve implantation at Children Hospital Los Angeles.
  
  
  METHODS
  Medical records of patients were reviewed retrospectively and divided into two groups. All cases received single stage valve implantation in which the tube was inserted primarily into the anterior chamber. In cases with Baerveldt implants, the silicone tube was ligated near its plate location with a single absorbable suture. Group 1 included patients with Baerveldt glaucoma implant model BG 101-350, while group 2 included patients with Ahmed valve implant model S-2. Patients' data collected ranged over the period from 2001 to 2008. The minimum follow up period was 6 month; maximum follow up period was 8 years. All patients were below 18 years of age. Success was considered if last postoperative IOP was between 8 and 24 mm Hg (with or without medications), no additional glaucoma surgery after valve implantation, and absence of visually significant complications.
  
  
  RESULTS
  Group 1 included 20 cases and group 2 included 11 cases. Long term success rate based on criterion defined was 80% for group 1 (Baerveldt) with average IOP postoperatively on last follow-up of 19.6 mm Hg. In group 2 (Ahmed), average postoperative pressure was 24 mm Hg with 6 out of 11 considered successful based on criterion giving 54.5% success rate.
  
  
  CONCLUSIONS
  In the long term, single stage Baerveldt implantation appears to control pressure well in pediatric glaucoma.
authors: Childrens Hospital Los Angeles, University of Southern California, USA ; Department of Ophthalmology, Cairo University, Cairo, Egypt.
authors: Nehal M S
authors: NM
authors: El Gendy
authors: Jonathan C
authors: JC
authors: Song
keywords: Ahmed implant; Baerveldt implant; Comparison; Glaucoma; Glaucoma valve; Pediatric
references: Int Ophthalmol. 1992 Sep;16(4-5):359-62
references: 1428571
references: J Glaucoma. 1995 Jun;4(3):151-7
references: 19920661
references: Ophthalmology. 1983 Jul;90(7):805-6
references: 6622020
references: Ophthalmic Surg. 1990 Nov;21(11):794-8
references: 2270165
references: Br J Ophthalmol. 1989 Mar;73(3):186-90
references: 2706209
references: J AAPOS. 1999 Oct;3(5):308-15
references: 10532577
references: Am J Ophthalmol. 2003 Jun;135(6):821-9
references: 12788122
references: Br J Ophthalmol. 1989 Aug;73(8):608-11
references: 2765438
references: Ophthalmology. 1992 Oct;99(10):1512-9
references: 1454316
references: Ophthalmology. 1997 Jun;104(6):996-1001; discussion 1002-3
references: 9186441
references: Ophthalmic Surg. 1984 Apr;15(4):319-22
references: 6728407
references: Ophthalmic Surg Lasers. 1995 Sep-Oct;26(5):401-3
references: 8963852
references: Br J Ophthalmol. 1994 Oct;78(10):745-8
references: 7803349
references: Am J Ophthalmol. 2005 May;139(5):847-54
references: 15860290
references: J Fr Ophtalmol. 1992;15(6-7):400-4
references: 1294596
references: Ophthalmology. 1999 Dec;106(12):2312-8
references: 10599663
references: Am J Ophthalmol. 1999 Jan;127(1):34-42
references: 9932996
references: Indian J Ophthalmol. 1987;35(5-6):265-70
references: 3508788
references: Ophthalmology. 1979 Jan;86(1):170-80
references: 316885