Tissue Retractor Assembly for Single Port Laparoscopic Surgery
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Solution Overview
Problem
Current single port laparoscopic surgery techniques face challenges in organ retraction due to limited access and the risk of organ damage, requiring a minimally invasive, atraumatic organ retraction system that can adjust tension extracorporeally and accommodate varied anatomical presentations without additional abdominal incisions.
Innovation Solution
A tissue retractor assembly comprising a multi-component device with a detachable grasper and anchored guide member/suture subassembly, allowing for secure organ retraction through a 5 mm port, featuring a deployable anchor with sharpened legs and a suture mechanism for external manipulation, enabling atraumatic grasping and adjustable tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a single port is introduced through the umbilicus to gain access to internal organs, then patient trauma and surgical time are reduced, but organ retraction becomes difficult due to limited access and the port location being caudal to the organs
Solution Approach 1:
The device is divided into distinct functional segments: a port access component, a retraction element, and a securing mechanism. This segmentation allows each component to perform its specific function optimally while being delivered through a single port, resolving the contradiction between minimal access and effective retraction.
Solution Approach 2:
The retraction device utilizes three-dimensional spatial arrangement within the constrained single port environment. The retraction element is positioned and oriented in specific dimensions to achieve effective organ retraction despite the limited and caudal port location, transforming the dimensional constraints into a workable configuration.
2Ease of operation
If additional abdominal incisions are made to facilitate introduction of organ retraction system, then organ retraction capability is improved, but patient trauma and minimally invasive benefits are lost
Solution Approach 1:
The single port device is designed to perform multiple functions: port access, organ grasping, retraction, and securing. This multi-functionality eliminates the need for additional incisions while maintaining effective retraction capability, as the same device structure serves multiple surgical needs.
Solution Approach 2:
The retraction device acts as an intermediary tool that translates the limited access through a single port into effective organ retraction capability. It mediates between the constrained port location and the required retraction force, enabling the procedure to maintain minimally invasive benefits.
3Device complexity
If traditional retraction instruments are used through single port access, then device simplicity is maintained, but the risk of organ damage and puncture increases
Solution Approach 1:
The retraction element incorporates flexible, atraumatic surfaces that conform to organ contours. This flexible design maintains device simplicity while significantly reducing the risk of organ damage and puncture compared to rigid traditional instruments, as the flexible material adapts to tissue geometry without sharp edges or rigid corners.
Solution Approach 2:
The device modifies critical parameters of traditional retraction instruments, specifically changing the surface characteristics from rigid and potentially traumatic to flexible and atraumatic. This parameter change maintains the overall device simplicity while fundamentally improving safety by reducing tissue damage risk through altered mechanical properties.
4Device complexity
If fixed tension retraction is applied, then device simplicity is maintained, but adaptability to varied anatomical presentations is reduced
Solution Approach 1:
The retraction device incorporates dynamic tension adjustment mechanisms that allow the surgeon to modify retraction force during the procedure. This dynamic capability enables adaptation to varied anatomical presentations while maintaining relative device simplicity, as the adjustment mechanism integrates into the existing structure without requiring complete redesign.
Data Source
AI summary
An intracorporeal surgical tissue retractor is provided having an anchor selectively deployable in a first tissue not to be retracted and a grasper selectively deployable on a second tissue to be retracted. A longitudinally selectively movable support is threadable through the anchor and attached at a substantially distal end of the movable support to the grasper. A deployment user interface is couplable to the movable support and has a proximal end manipulable by a user extracorporeally and a distal end releasably attachable to both the anchor and the grasper, adapted to intracorporeally deploy the anchor into the first tissue and the grasper onto the second tissue. The user interface includes a first actuator having an anchor positioning tool enabling selective deployment of the anchor in the first tissue, and a second actuator enabling selective opening and closing of the jaws of the grasper.