Scheduled Postoperative Ripcord Removal in Baerveldt 350 Implants: A Prospective, Randomized Trial.

PURPOSE

Many surgeons remove the ripcord in the Baerveldt glaucoma drainage device to better control tube opening and intraocular pressure (IOP) lowering postoperatively. However, complications following Baerveldt implant surgery with or without ripcord removal are not well-characterized. We performed a prospective, randomized trial to test the hypothesis that scheduled ripcord removal decreases complications and final IOP.

METHODS

Eighty-one patients were enrolled and randomized to scheduled ripcord removal at postoperative week 3 or to observation. They were followed for 6 months, and outcomes were compared between the 2 groups.

RESULTS

Forty-four patients were randomized to scheduled ripcord removal and 37 to observation. The intervention group had a similar rate of total complications after ripcord removal (36% vs. 24%, P=0.24), a lower rate of tube fibrin obstruction (2.3% vs. 13.5%, P=0.05), and a larger decrease in the number of medications (1.3 vs. 0.49 fewer medications, P=0.01). The removal group's mean IOP decrease was 8.6 mm Hg and success rate was 59%, defined as 5 mm Hg<final IOP≤15 mm Hg without further surgical intervention. Neither differed significantly from those of the control group.

CONCLUSIONS

This study suggests that scheduled ripcord removal is correlated with similar overall recovery in comparison with spontaneous tube opening. This technique leads to similar IOP decrease and success rate and is also associated with a greater decrease in the number of medications, which may improve quality of life for patients. Additional studies could be useful in clarifying this technique's role in the postoperative course among different patient populations.