Results: NBS-SPT was attempted 65 times over the study period. Indications included acquired/congenital neurogenic bladder (48%) and urinary retention (25%). A simultaneous additional procedure (e.g. cytolitholapaxy, bladder neck incision) was performed in 31% of NBS-SPTs. Median BMI was 29.5 (IQR: 25-33.9) and 34% had prior abdominal procedures. Median operative time (NBS-SPT only) was 16 minutes (IQR 14-20). All procedures were successful in placing a catheter =20 Fr. 30-day Clavien I/II complication rate was 18% (hematuria n=3; cellulitis n=4; early SPT exchange for clogging n=5). A Clavien IIIb complication occurred in one patient with hematuria requiring fulguration. First SPT exchange in clinic was successful in 95%, with two patients requiring replacement under anesthesia.
Conclusions: NBS-SPT is a safe and efficient minimally invasive technique for initial, precise placement of large caliber SPT in patients with urethral bladder access.