Adjustable Cannula Assembly for Asymmetrical Surgical Workspace Expansion
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Solution Overview
Problem
Existing minimally invasive surgical systems face limitations in enlarging the surgical workspace, particularly for shallow or asymmetrical surgical working spaces, as they often rely on symmetrical enlargement methods like insufflation, which may not provide sufficient access for intricate surgical tasks.
Innovation Solution
The development of a computer-assisted teleoperated surgery cannula device with an adjustable cannula assembly that includes a proximal and distal portion, allowing for user-adjustable assembly length and a body wall retractor, enabling asymmetrical enlargement of the surgical workspace by creating a tissue tent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If symmetrical enlargement methods like insufflation are used, then the surgical workspace is enlarged uniformly, but the access for intricate surgical tasks in shallow or asymmetrical spaces is insufficient
Solution Approach 1:
The cannula assembly is designed with asymmetrical geometry where the distal portion includes a body wall retractor that creates an asymmetrical tissue tent. This asymmetrical configuration provides targeted enlargement and improved access for intricate surgical tasks in shallow or closely spaced surgical spaces, resolving the limitation of symmetrical insufflation methods
Solution Approach 2:
The cannula assembly is divided into distinct segments: a proximal cannula portion and a distal cannula portion that can be adjustably engaged. This segmentation allows independent positioning of the body wall retractor to create optimal asymmetrical workspace configuration while maintaining the ability to adjust overall assembly length for different surgical scenarios
2Adaptability or versatility
If the cannula assembly length is fixed, then the device structure is simple, but the adaptability to different surgical scenarios is limited
Solution Approach 1:
The cannula assembly incorporates adjustability mechanisms that allow the overall assembly length to be dynamically changed during use. The distal cannula portion can be adjustably engaged with the proximal cannula portion, enabling the device to adapt to different surgical scenarios and patient anatomies without requiring multiple fixed-length devices
Data Source
AI summary
Systems and methods for minimally invasive computer-assisted telesurgery are described. For example, this disclosure describes cannula devices for use with computer-assisted teleoperated surgery systems. The cannula devices can facilitate enlargement of a minimally invasive surgical workspace by creating a tissue tent. The devices and methods described herein can be used in conjunction with computer-assisted teleoperated surgery systems that use either hardware-constrained remote centers of motion or software-constrained remote centers of motion.