Prospective randomized comparison of cutting and dilating disposable trocars for access during laparoscopic renal surgery.

Ramakrishna Venkatesh, Chandru P. Sundaram, Robert S. Figenshau, Yan Yan, Gerald L. Andriole, Ralph V. Clayman, Jaime Landman

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


BACKGROUND AND OBJECTIVES: Traditional trocar tip design for laparoscopic access incorporates cutting blades to penetrate the body wall. More recently, trocars applying tissue dilation have been used that create a smaller defect, seldom requiring fascial wound closure. Four 12-mm commercially available single-use trocar designs were evaluated for postoperative pain. METHODS: The 4-trocar types included 2 cutting (single or pyramidal bladed) and 2 dilating trocars (radially or axially dilating) type. Fifty-six patients undergoing transperitoneal laparoscopic renal surgery were randomized and blinded to one of the 4 trocar types. In each case, trocars were placed in a standard "diamond" configuration: three 12-mm study trocars and a lateral 5-mm trocar that served as a reference point for normalizing patients' pain scores. Postoperative pain based on a visual analog scale and complications were assessed. RESULTS: No statistically significant difference existed in pain scores between different trocar types or trocar sites at 3-hour, 24-hour, and 1-week postoperative assessment time points. Eight (4.8%) minor complications occurred: bleeding in 7 (4.2%) and 1 (0.6%) wound infection. The radially dilating trocar had more device malfunction (P<0.05) than did the others. CONCLUSION: All 4 disposable trocars, muscle cutting or dilating type, were safe and yielded similar postoperative pain scores with or without the fascial wound closure after renal laparoscopy.

Original languageEnglish
Pages (from-to)198-203
Number of pages6
JournalJSLS : Journal of the Society of Laparoendoscopic Surgeons / Society of Laparoendoscopic Surgeons
Issue number2
StatePublished - Jan 1 2007


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