Evaluation of the learning curve for Thulium VapoEnucleation of the prostate (ThuVEP) using a mentor-based approach

Department of Urology, Asklepios Hospital Barmbek, Rübenkamp 220, 22291, Hamburg, Germany, .
World Journal of Urology (Impact Factor: 3.42). 06/2012; 31(5). DOI: 10.1007/s00345-012-0894-1
Source: PubMed

ABSTRACT INTRODUCTION: To evaluate the learning curve of Thulium:YAG VapoEnucleation of the prostate (ThuVEP) for patients with symptomatic benign prostatic obstruction (BPO) prospectively. METHODS: ThuVEP was performed using the 120 Watt 2 μm continuous wave Thulium:YAG laser. ThuVEP was done by a resident without experience in transurethral prostate surgery (A, n = 32), an experienced endourologist (B, n = 32), and an experienced surgeon in ThuVEP (C, n = 32), who served as the mentor for A/B. Patients were divided into consecutive subgroups of 8 patients to assess the impact of the learning curve on procedure outcome. Patient demographic, perioperative, and 12-month follow-up data were analysed. RESULTS: ThuVEP was successfully completed in all patients. Enucleation efficiency (g/min) differed significantly between surgeon A (0.48 ± 0.3), B (0.7 ± 0.36), and C (1.4 ± 0.67) (p ≤ 0.001). Enucleation efficiency correlated significantly with the weight of resected tissue in surgeon A (r = 0.88), B (r = 0.73), and C (r = 0.79) (p < 0.001). ThuVEP was performed by surgeon A and B with reasonable enucleation, morcellation, and overall operation efficiency after 8-16 procedures. At 12-month follow-up, 68 (71 %) patients were available for review. IPSS, QoL, Qmax, PVR, PSA, and prostate volume improved significantly at follow-up (p ≤ 0.023). Mean PSA/prostate volume reduction was 81.95/74.5, 80.7/79.4, and 87.6/75.9 % in surgeon A, B, and C, respectively. Urethral stricture and bladder neck contracture developed 2 (A = 1, B = 1; 2.1 %) patients and 1 (C, 1 %) patient each, respectively. CONCLUSIONS: ThuVEP can be performed with reasonable efficiency even during the initial learning course of the surgeon when closely mentored. Previous experience in the field of endourology is beneficial.

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