Ahmed glaucoma valves in refractory glaucoma: a 7-year audit

Abstract

AGV implantation offered good long-term IOP control with a success rate of 78.7%. The authors recommend C3F8 gas fill and temporary tube ligation in eyes at high risk of postoperative hypotony and the use of donor sclera or human pericardial patch to prevent tube erosion.

A Review of the Ahmed Glaucoma Valve Implant and Comparison with Other Surgical Operations

“…Indeed, a valve mechanism has been introduced in an attempt to prevent complications sometimes encountered with non-valved GDIs, such as hypotony, shallow anterior chamber, choroidal effusion and choroidal detachment [14]. Several studies have shown that AGV is safe and effective in reducing IOP in patients with primary [15][16][17], secondary [18][19][20][21][22][23][24] and refractory glaucoma [25][26][27]. However, the hypotensive efficacy of AGV in comparison with other anti-glaucoma interventions has not been completely elucidated.…”

Complications due to bovine pericardium used to cover acrylic implants after enucleation and tubes of aqueous devices

“…Complications due to bovine pericardium used to cover acrylic implants after enucleation and tubes of aqueous devices Bovine pericardium has been described for wrapping of hydroxyapatite implants [1][2][3][4][5] and Ahmed devices. Owing to a shortage of human scleral graft (HSG), we decided to switch to tutopatch for coverage of acrylic implants after enucleation and aqueous devices.…”

“…A significantly higher incidence of exposure and inflammation in the early postoperative period using bovine pericardium have been reported. 3,5 The underlying mechanism responsible for wound dehiscence is unclear, possibly caused by an inflammatory response. 5 These serious complications need to be reported to alert other surgeons.…”

Why we get a blue stain

“…Sir, Complications due to bovine pericardium used to cover acrylic implants after enucleation and tubes of aqueous devices Bovine pericardium has been described for wrapping of hydroxyapatite implants [1][2][3][4][5] and Ahmed devices. Owing to a shortage of human scleral graft (HSG), we decided to switch to tutopatch for coverage of acrylic implants after enucleation and aqueous devices.…”

“…3,5 The underlying mechanism responsible for wound dehiscence is unclear, possibly caused by an inflammatory response. 5 These serious complications need to be reported to alert other surgeons. The use of bovine pericardium to cover orbital implants should be handled with greatest caution until the exact cause of these postoperative complications has been clarified.…”