How I Handle Retreatment of LUTS Following a Failed MIST.

The goal of this paper is to review retreatment management after failed minimally invasive treatment (MIST) of various technologies.
A failed MIST can be defined by the return, persistence, or worsening of LUTS, as documented by symptom scores. Persistence, development, or recurrence of comorbidities such as recurrent urinary tract infection (UTI), retention, stones, hematuria, and incontinence can also signal a failed MIST. The common etiology for MIST failure is the preoperative consequence of long-term bladder outlet obstruction (BOO) on the bladder function. Close monitoring of therapies with antimuscarinics or beta-agonists can be empirically utilized if post-void bladder residual (PVR) is low. If there is a high PVR, urodynamic studies and cystoscopy can be used to determine overactive bladder (OAB), BOO, or necrosis. Depending on the timing of the observed BOO/OAB, subsequent retreatments involving transurethral debridement, medical and behavioral therapies, or repeat surgical debulking can be employed.