Single-Port Transvesical Partial Prostatectomy Versus High Intensity Focused Ultrasound

A foley catheter is inserted on the sterile field. A suprapubic midline incision is made and the da Vinci SP surgical system is docked percutaneously directly to the bladder. Prior to the operation, a radiologist identifies and segments tumors and the urethra. A transrectal ultrasound probe is inserted and secured into a fixed position. The Koelis software is utilized to fuse MRI and ultrasound images to identify the target lesion in real-time, allowing for intraoperative guidance. The ultrasound probe rotates automatically, allowing for localization of the tumor intraoperatively. Then depending on the area of the tumor, a Hemi or quadrant resection is completed while preserving the nerves, vas deferens, and seminal vesicles. The urethrovesical anastomosis is then performed.

Three contoured measurements are required for the MR fusion system to reproduce the volume of the prostate. Following this, the area to be targeted will be selected in graded fashion from the anterior to posterior of the prostate. Once planning of ROI (region of interest) is complete, the HIFU treatment may begin. Quadrant or hemi ablation will be performed based on the size and complexity of the tumor. The distal margin of the ablation will be kept at least 4 mm away from the external sphincter. The rectal temperature and its distance from the probe will be carefully monitored throughout the procedure.