Infant Robot-assisted Laparoscopic Pyeloplasty: Outcomes at a Single Institution, and Tips for Safety and Success.

BACKGROUND: Since its first description, multiple reports proved efficacy and safety of the robotic platform. Further progress has been made allowing for the application of robotic surgery to smaller patients, including infants. Despite the early favorable results, the use of robot surgery in infants is still controversial and more studies are needed to confirm its benefits.

OBJECTIVE: To our knowledge, we present the largest single-institution case series of robot-assisted laparoscopic pyeloplasty (RAL-P) in infants, aiming to contribute to the current literature with a guide for key technical steps and safety tips for infant RAL-P.

DESIGN, SETTING, AND PARTICIPANTS: We performed a retrospective review of a prospectively maintained database. The study protocol was approved by the institutional review board.

SURGICAL PROCEDURE: Only infants (≤12 mo of age) with a diagnosis of congenital ureteropelvic junction obstruction (UPJO) undergoing primary robotic dismembered pyeloplasty were included in the study.

MEASUREMENTS: We critically reviewed the clinical outcomes, described the main steps of the operation, and shared tips for a safe approach.

RESULTS AND LIMITATIONS: From January 2012 to August 2019, 44 infants underwent RAL-P for UPJO--33 (75%) males and 11 (25%) females. All robotic cases were completed successfully, with no laparotomic conversions. The median age and weight were 4 (1-12) mo and 6.8 (3.8-10.5) kg, respectively. The mean operative time was 142 (±25) min. The mean estimated blood loss was 7 (±3.6) ml, and no intraoperative complications occurred. The mean length of hospital stay (LOS) was 1.4 (±0.7) d. Seven (15.6%) patients had postoperative complications-one (2%) ileus (Clavien-Dindo grade [CDG] I), four (9%) urinary tract infections (CDG II), and two (4.5%) port-site hernias (CDG III). At a median follow-up of 19 mo, the success rate was 100%.

CONCLUSIONS: Given the successful outcomes, benefits of decreased LOS, and improved cosmesis, RAL-P is an appealing management option for UPJO in infants. Market release of new systems, further miniaturization of instruments, and more affordable costs will hopefully be shedding light on more complex applications.

PATIENT SUMMARY: Infants (≤12 mo of age) diagnosed with ureteropelvic junction obstruction undergoing primary robotic dismembered pyeloplasty were selected and included in this study. No intraoperative complications or conversion to an open approach occurred. Seven patients (16%) developed postoperative complications-one (2%) postoperative ileus, four (9%) urinary tract infections, and two (4.5%) port-site hernias. At a median follow-up of 19 (7-66) mo, the success rate was 100%.