P-BN48 Utilising spatial geometry to obtain the ideal needle mount for laparoscopic intracorporeal suturing. (16th December 2021)

• Record Type: Journal Article
• Authors: Kanitkar, Rahul; Muthukumarasamy, Girivasan; Patil, Pradeep; Tang, Benjie; Zino, Samer
• Is Part Of: British journal of surgery. Volume 108:Supplement 9(2021)
• Publication Date: 2021-12-16
• Subjects: Surgery -- Periodicals; 617.005
• DOI: 10.1093/bjs/znab430.046
• Languages: English
• ISSNs: 0007-1323

Abstract

Abstract: Background: Intracorporeal suturing is an essential component of any advanced laparoscopic procedure like fundoplication, bypass surgery or common bile duct exploration. Obtaining the appropriate needle mount during suturing can be challenging. Spatial geometry defines points in three-dimensional space. Ergonomics in laparoscopic surgery identifies a manipulation angle of 60 o to target as being optimal. This knowledge, in combination with the principles of light reflection can be used to understand needle orientation in laparoscopic suturing. Methods: An experiment was designed on a laparoscopic trainer with three participants. Using the principles of spatial geometry and light reflection, four different points were identified on an angle chart and labelled for a right-hand dominant participant as; centre, right off-centre (5.5cm), right lateral (10 cm) and left off-centre (5.5cm). Each participant was instructed to mount the needle at the defined points using light reflection on the needle shaft as a reference guide. Three readings were taken for each position. Mounted angle was defined as the angle between the shaft of needle holder and long axis of the needle. This was measured using a special application and an average value determined for each position. Results: The average values for the mounted angle measurements for each spatial position were: Centre(112 o ), Right off centre(101 o ), Right lateral (88.8 o ) and Left off centre (124.6 o ). Conclusions: This study describes a novel and reproducible technique to obtain an ideal needle mount. For a needle mount greater than 100 o either the centre position or the left off-centre position should be considered.