Laparoendoscopic single-site porcine nephrectomy using a novel valveless trocar system.
OBJECTIVE
The AirSeal™ access system is a novel laparoscopic trocar that uses airflow to create insufflation pressure without the need for a physical seal or valve. By eliminating all valve elements within the lumen of the canula, the port provides a platform that accommodates multiple instruments of any diameter, shape, or combination and is ideally suited for laparoendoscopic single-site surgery (LESS). We present our initial experience with valveless trocars in traditional urologic laparoscopic cases and a porcine LESS nephrectomy series.


METHODS
Nine transperitoneal LESS nephrectomies were performed in a live porcine model using the 27-mm oval valveless trocar. All working instruments were placed through the single port, and the specimen was extracted through the 4-cm port site.


RESULTS
All cases were completed without technical or operative complications. The porcine single-port nephrectomy (n=9) was successfully performed in a mean operative time of 24 minutes through the single 27-mm oval trocar. This accommodated a 5-mm laparoscope, multiple 5-mm instruments, the Endo GIA stapler, and the 15-mm Endocatch bag without loss of insufflation pressure. Condensation and smudging of the laparoscope were minimized, improving visualization and efficiency. The system allowed for use of suction without significant loss of insufflation pressure.


CONCLUSIONS
The initial experience with the AirSeal valveless trocar system in LESS is encouraging. This technology may offer significant benefits over traditional laparoscopic trocars and single -port platforms and appears particularly suited to facilitate LESS.
Department of Urology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California 90095-1738, USA.
John T
JT
Leppert
Alberto
A
Breda
Jonathan D
JD
Harper
Peter G
PG
Schulam
D000818:Animals; D010535:Laparoscopy / Q000379:methods*; D023421:Models, Animal; D009392:Nephrectomy / Q000295:instrumentation* / Q000379:methods*; D013525:Surgical Instruments; D034421:Sus scrofa / Q000601:surgery*