 |
|
Optimal Angle Between Instrument Shaft and Handle for Laparoscopic Bowel Suturing
Shabeer Ahmed, FRCS;
George B. Hanna, PhD, FRCS;
Alfred Cuschieri, MD, FRSE
Arch Surg. 2004;139:89-92.
Objective To determine the optimal angle between the handle and instrument shaft for endoscopic suturing.
Design A rocker handle needle driver was used to investigate the 0°, 40°, and 80° handle-to-shaft angles. The standard task entailed closure of a 50-mm enterotomy in a nonliving porcine small-bowel model. Fifty enterotomies were performed with each angle in a random sequence.
Setting Research laboratory in the Surgical Skills Unit at Ninewells Hospital.
Participants Ten surgeons with previous experience in laparoscopic surgery.
Main Outcome Measures The execution time (in minutes), leakage pressure (in centimeters of water), and suture error placement score (deviations of the entry and exit points <3 mm or >5 mm from the enterotomy edge or between sutures).
Results The 40° handle-to-shaft angle had a higher mean (SD) leakage pressure of 43.8 (20.0) cm H2O compared with the 80° and 0° angles (31.1 [21.0] and 26.3 [19.0] cm H2O, respectively) (P<.001). In addition, the 40° angle had a lower mean (SD) suture error placement score of 13.6 (7.6), compared with the 80° and 0° angles (19.4 [9.4] and 21.1 [8.5], respectively) (P<.001). No significant difference was found in the execution time between the different angles (P = .20).
Conclusion The best quality of laparoscopic bowel suturing, in terms of the accuracy of suture placement and the integrity of the suture line closure, was obtained with a 40° handle-to-shaft angle.
From the Department of Surgery and Molecular Oncology, Ninewells Hospital and Medical School, University of Dundee, Dundee, Scotland.
THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES
Methodological Infrastructure in Surgical Ergonomics: A Review of Tasks, Models, and Measurement Systems
Lee et al.
SURG INNOV 2007;14:153-167.
ABSTRACT
|
