VT276 : Silicon tube extension in retracted AGV tube – a novel techinque

Dr.Natasha Gautam, Dr. FAISAL T. T., Dr.Simar Rajan Singh, Dr.Pandav Surinder Singh

An eleven year old male developed intractable glaucoma following R/E Pars plana lensectomy and vitrectomy after firecracker injury. He underwent Ahmed glaucoma valve implantation to control IOP. 2 months later, the AGV tube had retracted back leading to high IOP again. On examination, the patient had IOP of 44mmHg (on maximum topical and oral medication) the tube was not visible in anterior chamber on slit lamp as well as on gonioscopy. The management option was either repositiong the plate and tube which was cumbersome or use of tube extender. A silicon tube segment was connected to the existing tube using a novel technique to lengthen the tube so that it could be placed in anterior chamber again avoiding the need to use commercially available AGV tube extender which is expensive and bulky. The patient maintained good IOP control and extended tube was well visualised in anterior chamber in the postoperative period. There was well formed aqueous lake on Ultrasonography.