Browsing by Author "Shelton, Thomas M."

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    Increased oscillation rate may improve morcellation efficiency in HoLEP
    (Canadian Urological Association, 2025) McClaine, Cameron; Shelton, Thomas M.; Slade, Austen; Adeola, Andrew; Rivera, Marcelino E.; Urology, School of Medicine
    Introduction: Tissue morcellation has become increasingly efficient, yet remains a rate-limiting step in holmium enucleation of the prostate (HoLEP). Limited data exists on how the rate of oscillation by the morcellator blades affects morcellation efficiency (ME). Methods: We undertook a retrospective review of HoLEP procedures performed by two surgeons from July 1, 2019, to August 25, 2022. All morcellation was performed with the Wolf Piranha device and enucleation was performed with Moses 2.0 technology. Surgeon 1 routinely uses 1500 oscillations/min (low rate [LR]) and surgeon 2 uses a rate of 6000 oscillations/min (high rate [HR]). These rates were confirmed upon electronic medical record review of each case. The primary endpoint was ME (g/minute). Secondary endpoints included enucleation efficiency (EE), mean tissue specimen weight, and preoperative prostate volume. Results: A total of 894 HoLEPs were analyzed, 592 by surgeon 1 and 302 by surgeon 2. Surgeon 1 had larger preoperative prostate volumes (126 vs. 101, p<0.001) and specimen tissue weights (86.0 vs. 61.1, p<0.001). EE was higher in the LR group (1.67 vs. 1.33 g/min, p<0.001). Morcellation time was longer in the LR group (11.3 vs. 6.09 min, p<0.001) and ME was lower in the LR group (9.26 vs. 12.1 g/min, p<0.001). The difference in ME was inversely proportional to specimen weight. Conclusions: Increased oscillation rate during morcellation may lead to decrease in morcellation time and increased ME during prostate enucleation. The primary limitation of this paper is the inclusion of only two surgeons. Future studies will serve to evaluate this finding across a larger number of institutions, and evaluate ways to increase ME in large prostate cohorts.
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    A novel technique for direct visualization of reservoir placement for penoscrotal inflatable penile prostheses using a single incision
    (Wolters Kluwer, 2018-10) Roth, Joshua D.; Monn, M. Francesca; Shelton, Thomas M.; Mellon, Matthew J.; Urology, School of Medicine
    Introduction: We aim to present a modified technique and outcomes of a novel method allowing for direct visualization of the reservoir placement during a penoscrotal inflatable penile prosthesis (IPP). Methods: Out of165 patients who underwent IPP placement from August 2012 to March 2015, 157 underwent a modified technique and comprised the cohort of this study. A Deaver's retractor was placed lateral to the penis and over the pubic bone to allow for direct visualization of the tissues overlying the lower abdomen. After dissecting through the superficial layers, the Deaver's was slowly advanced, allowing for visualization of the fascia, which was incised. Using blunt dissection, a space for the reservoir was created between the bladder and the pubic bone. The reservoir was then placed safely into this space and the Deaver's retractor was removed. Results: The causes of ED in the study cohort included postprostatectomy ED (n = 107), organic impotence (n = 40), Peyronie's disease (n = 3), ED following cystoprostatectomy (n = 2), ED due to spinal cord injury (n = 2), ED resulting from priapism (n = 2), and ED after pelvic injury (n = 1); all of which were refractory to medical management. The median age of study population was 66 years and the mean (standard deviation) operative time was 72.8 (14.7) min. Eighty percent of the procedures were performed on outpatient basis. Complication rates were low (<5%), with four infections, one proximal pump migration, one scrotal hematoma, and one urinary tract infection. Conclusion: The modified technique for placement of the IPP's spherical reservoir under direct visualization through a penoscrotal incision is quick, safe, and effective.