Efficacy of Gemcitabine Submucosal Injection for Preventing Recurrence in Intermediate- and High-Risk Non-Muscle-Invasive Bladder Cancer: A Randomized Trial

A chemotherapeutic agent. Administered via submucosal injection into the bladder wall using a specialized injection gun. Dosage: 1000mg per injection. Regimen: One injection immediately post-TURBT, followed by one injection every three months for a total of four injections.

Standard therapy. Administered by instilling a solution into the bladder via a catheter. Dosage: 2000mg dissolved in 50mL normal saline per instillation. Regimen: One instillation immediately post-TURBT, followed by an induction phase (once weekly for 8 weeks) and a maintenance phase (once monthly for 10 months). The solution is retained for 30-60 minutes.