Circumferential Retractor Lighting for Shadow-Free Deep Incisions
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Solution Overview
Problem
Existing surgical lighting technologies, such as overhead lamps and headlamps, struggle with casting shadows, glare, and limited illumination in confined surgical sites, requiring frequent adjustments and often necessitating manual handling, while lighted retractors fail to provide circumferential illumination and deep cavity visibility.
Innovation Solution
A lighted surgical access system featuring a retractor with a plastic optical fiber (POF) that provides 360-degree illumination by positioning the light source beneath the incision, using a POF to distribute light evenly around the surgical site, eliminating shadows and glare, and allowing hands-free operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If overhead surgical lamps are used to illuminate the surgical site, then the surgical site can be illuminated, but shadows are cast and visibility is limited
Solution Approach 1:
The lighting system is segmented into multiple light sources positioned at different locations around the surgical site, with each light source providing illumination from a specific angle. This segmentation eliminates shadows by ensuring that no single direction blocks the light, as multiple directions are represented.
Solution Approach 2:
The patent transitions from traditional single-direction or limited-direction overhead lighting to multi-dimensional illumination by positioning light sources around the surgical site in various orientations. This creates circumferential lighting that envelops the surgical field, eliminating shadows that would occur with unidirectional lighting.
2Ease of operation
If overhead surgical lamps are positioned far outside the surgical site, then they are convenient to use, but the area of illumination is not tightly focused causing glare
Solution Approach 1:
The light sources are extracted from the traditional overhead position and repositioned to be in close proximity to the surgical site, integrated with the retractor system. This extraction allows the light to be positioned where it is most needed, achieving tight focus on the surgical field without glare.
Solution Approach 2:
The retractor system serves as an intermediary carrier for the light sources. By integrating the lighting function into the retractor, the system achieves both close proximity to the surgical site (for focused illumination) and ease of operation (as the retractor is already positioned by the surgeon).
3Manufacturing precision
If the size of the incision or opening is diminished, then surgical precision is improved, but the amount of light that can illuminate the internal anatomy is restricted
Solution Approach 1:
The light sources are nested within or integrated into the retractor structure that is already positioned within the incision. This nesting allows the lighting system to occupy minimal space while providing sufficient illumination, enabling use with small incisions without compromising surgical precision.
4Ease of operation
If surgical headlamps are used to provide illumination, then portability is improved, but they cast shadows and require continuous concentration to keep light properly directed
Solution Approach 1:
The lighting function is merged with the retractor system, combining two surgical tools into one integrated device. This merger eliminates the need for separate headlamp operation, allowing the surgeon to maintain both functions simultaneously without the distraction of adjusting headlamp position.
Solution Approach 2:
The retractor-integrated lighting system is self-positioning relative to the surgical site. As the retractor is naturally positioned by the surgeon to provide mechanical function, the integrated light sources automatically achieve optimal positioning for illumination, eliminating the need for continuous adjustment.
5Illumination intensity
If lighted single point retractors are used to illuminate the surgical site, then some problems with overhead lights are solved, but they sacrifice convenience because they must be held by hand
Solution Approach 1:
The retractor is designed with self-retaining capabilities, allowing it to maintain its position and the integrated lighting function without requiring continuous manual holding. The device serves itself by mechanically securing to the tissue, freeing the surgeon's hands while maintaining both retraction and illumination functions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system ensures unobstructed, omnidirectional illumination of the surgical site, maintaining visual contrast and reducing the need for manual adjustments, while being atraumatic and thermally stable, enhancing surgical visibility and convenience.
Implementation Method 1
a lighted surgical access system featuring a retractor with a plastic optical fiber (POF) that provides 360-degree illumination by positioning the light source beneath the incision, using a POF to distribute light evenly around the surgical site
Data Source
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AI summary
The lighted surgical access system is provided that includes a circumferential retractor (3) and a plastic optical fiber (POF) (16) attached thereto. The circumferential retractor retracts and protects a patient's body opening while the POF illuminates the internal surgical site, body cavity or body opening.