Surgical Access Device Fixation and Illumination Mechanism
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Solution Overview
Problem
In minimally invasive surgical procedures, maintaining the position of surgical access devices relative to the body wall and providing adequate illumination at the surgical site are challenging, as existing devices often lack effective fixation mechanisms and integrated light sources.
Innovation Solution
A surgical access device featuring a fixation mechanism with an expandable member and an illumination mechanism, where the expandable member includes diamond-shaped openings and lights that adjust their position relative to the cannula body, allowing for secure anchoring and improved visibility during procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an expandable anchor or fixation mechanism is used to maintain the position of the surgical access device, then the stability of the device relative to the body wall is improved, but the device complexity increases
Solution Approach 1:
The expandable member is nested within the cannula body in a compact state during insertion, then expands outward to engage with the body wall. This nesting approach allows the fixation mechanism to be stored within the existing cannula structure without significantly increasing the overall device footprint or insertion complexity, while providing stable fixation when deployed.
Solution Approach 2:
The fixation mechanism transitions from a static, compact configuration during insertion to a dynamic, expanded configuration for fixation. The expandable member can be actuated to change its radial dimension, allowing the device to adapt its shape and size based on the operational phase (insertion vs. fixation), thereby providing stability without permanently increasing device complexity.
2Illumination intensity
If a light source is integrated on the surgical access device to illuminate the surgical site, then the illumination intensity is improved, but the device complexity increases
Solution Approach 1:
The illumination mechanism is merged with the existing fixation mechanism by mounting the light source on the expandable member. This integration allows the lighting function to be combined with the already-complex fixation structure, avoiding the need for a separate illumination system and thereby minimizing the increase in overall device complexity while still providing improved illumination at the surgical site.
3Device complexity
If the expandable member is positioned closer to the cannula body for compact storage, then the device complexity is reduced, but the illumination coverage area is limited
Solution Approach 1:
The expandable member and mounted light source transition between two dynamic states: a compact state during insertion where the member is positioned close to the cannula body, and an expanded state during fixation where the member radiates outward. This dynamic transformation allows the device to minimize complexity during storage/insertion while maximizing illumination coverage area during the surgical procedure when the member is expanded and positioned away from the cannula body.
Data Source
AI summary
A surgical access device including a cannula body, a fixation mechanism, and an illumination mechanism is disclosed. The fixation mechanism includes a collar, a sleeve, an expandable member, and a distal ring. The illumination mechanism includes at least one light disposed on the expandable member, and a switch. Distal translation of the collar relative to an elongated portion of the cannula body causes the expandable member to move from a first position defining a first gap between a mid-portion of the expandable member and the elongated portion of the cannula body, to a second position defining a second gap between the mid-portion of the expandable member and the elongated portion of the cannula body, the second gap being greater than the first gap.