Related Experiment Video
Updated: Aug 7, 2025

Author Spotlight: Regenerative Peripheral Nerve Interface (RPNI) Surgery in Postamputation Pain Management
Published on: March 15, 2024
R-LESS-RP versus C-LESS-RP: a single-institution retrospective comparative study
Yong Wei1,2, Qianying Ji2, Xin Zhou3
1Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, 210000, China.
Robot-assisted laparoendoscopic single-site radical prostatectomy (R-LESS-RP) offers improved perioperative outcomes, including reduced operation time and blood loss, compared to conventional methods. While R-LESS-RP shows benefits in urinary continence recovery and quality of life, it incurs higher costs.
Area of Science:
- Urology
- Surgical Oncology
- Minimally Invasive Surgery
Background:
- Radical prostatectomy is a primary treatment for prostate cancer.
- Laparoendoscopic single-site surgery (LESS) aims to minimize surgical invasiveness.
- Robot-assisted surgery offers enhanced dexterity and visualization in minimally invasive procedures.
Purpose of the Study:
- To compare perioperative and postoperative outcomes between conventional LESS radical prostatectomy (C-LESS-RP) and robot-assisted LESS radical prostatectomy (R-LESS-RP).
- To evaluate the efficacy and patient-reported outcomes of R-LESS-RP versus C-LESS-RP in prostate cancer treatment.
Main Methods:
- Retrospective analysis of data from 230 prostate cancer patients (106 C-LESS-RP, 124 R-LESS-RP).
- All surgeries performed by the same surgeon between January 2018 and January 2021.
- Comparison of clinical characteristics, perioperative metrics (operation time, blood loss, analgesic duration), and postoperative outcomes (urinary incontinence, quality of life, recurrence).
Main Results:
- R-LESS-RP demonstrated significantly shorter operation times (120 vs. 150 min), less estimated blood loss (17.68 vs. 33.68 ml), and shorter analgesic duration (0 vs. 1 day) compared to C-LESS-RP.
- No significant differences were observed in drainage tube duration or postoperative hospital stay between the groups.
- R-LESS-RP patients showed improved urinary incontinence recovery and higher quality of life scores, despite a higher cost (56559.51 CNY vs. 44818.27 CNY); biochemical recurrence rates were similar.
Conclusions:
- Robot-assisted laparoendoscopic single-site radical prostatectomy (R-LESS-RP) offers superior perioperative outcomes and faster recovery of urinary continence compared to conventional LESS-RP, particularly for experienced surgeons.
- R-LESS-RP provides enhanced health-related quality of life benefits, justifying the increased cost for selected patients.
- Further research may explore long-term oncological control and cost-effectiveness in diverse patient populations.
Related Concept Videos
Cross-Sectional Research
Regression Toward the Mean
Crossover Experiments
Crossover designs are performed even with smaller sample sizes since the samples can act as their controls. These are better than simple randomized trials since patients are exposed to all the treatments.
Longitudinal Research
Archival Research
Group Design

