Effects of Hyaluronic Acid/Collagen Resorbable Gel Use in Endoscopic Dacryocystorhinostomy.

The purpose of this study was to investigate whether the use of hyaluronic acid/collagen resorbable gel (Regenwel^®) has an inhibitory effect on rhinostomy obstruction during endoscopic dacryocystorhinostomy (Endo DCR). A total of 298 patients diagnosed with unilateral primary acquired nasolacrimal duct obstruction from May 2017 to June 2021 who underwent Endo DCR were enrolled. The patients were divided into the Regenwel group (152 patients) and the Control group (146 patients) that did not use Regenwel during surgery, and the medical records were compared and analyzed retrospectively. The mean age of the Regenwel group was 65.8 years, and that of the Control group was 63.2 years. Regarding anatomical success as the primary outcome, the Regenwel group had a higher success rate than the Control group (96.7% vs 86.3%, P = .012), and the functional success result confirmed that the Regenwel group had a higher success rate than the Control group (94.1% vs 84.3%, P = .024). Among secondary outcomes, granulation formation occurred less frequently in the Regenwel group than in the Control group (9.2% vs 32.2%, P < .001), and there was no statistically significant difference in postoperative bleeding between the 2 groups (0% vs 1.4%, P = .478). The Regenwel group had fewer infections after surgery than the Control group (5.3% vs 8.9%, P = .012) and required less frequent revision surgery (2.0% vs 15.8%, P < .001). In conclusion, Regenwel is a resorbable gel containing hyaluronic acid and collagen that is used during Endo DCR and is thought to contribute to the improvement of surgical success rate by preventing complications such as rhinostomy obstruction and bleeding after surgery.