Illuminated Surgical Retractor Blade Layout for Glare Control
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Solution Overview
Problem
Existing medical devices fail to provide sufficient illumination and create a glare that interferes with a physician's field of view.
Innovation Solution
A surgical retractor with a handle and a blade, featuring a flexible circuit board with multiple light sources angled to maximize illumination on the desired surgical field, a cover with openings for light sources, and a smoke evacuation channel, along with a push-tab assembly for easy battery removal and ergonomic design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If existing medical devices use integrated light sources to illuminate surgical fields, then illumination is provided, but the illumination is either insufficient or creates glare that interferes with physician's field of view
Solution Approach 1:
The patent applies local quality by configuring multiple light sources at different positions and angles along the blade, with each light source directed at specific areas of the surgical field. This localized illumination approach ensures that light is concentrated where needed while avoiding areas that would create glare in the physician's field of view, thereby resolving the contradiction between illumination intensity and glare interference.
Solution Approach 2:
The illumination system is segmented into multiple independent light sources rather than using a single integrated light source. Each light source can be independently positioned and angled to optimize illumination of different surgical field areas. This segmentation allows precise control over where light is directed, preventing glare while maintaining sufficient illumination throughout the surgical field.
2Loss of energy
If high efficiency LEDs are used to reduce energy loss, then less energy is converted to heat, but heat is still generated that can burn patients and damage tissue
Solution Approach 1:
The patent extracts the heat management function from the light sources by introducing separate cooling elements positioned between the light sources and the surgical field. These cooling elements actively remove heat from the illumination assembly, preventing heat from reaching the patient's tissue. This separation allows the use of high-power LEDs for efficient illumination while independently managing the heat they generate.
Solution Approach 2:
Cooling elements serve as intermediary components between the LED light sources and the patient's tissue. These intermediaries conduct heat away from the light sources before it can transfer to the patient, acting as a thermal barrier. This allows the system to maintain high energy conversion efficiency while protecting the patient from heat damage.
3Reliability
If single-use medical devices are used to eliminate sterilization needs, then cross contamination risk is reduced, but battery disposal creates environmental pollution from heavy metals
Solution Approach 1:
The patent implements a battery removal mechanism that enables recovery and proper disposal of batteries from single-use devices. The push-tab assembly allows easy access to and removal of batteries, facilitating their separation from the disposable device body. This enables batteries to be recovered for environmentally sound disposal or recycling, while the device body can be incinerated as biohazardous waste without contamination risk.
4Loss of time
If illuminated medical devices are assembled pre-shipped to save time, then assembly time is reduced, but manufacturing and shipping regulations may be violated
Solution Approach 1:
The patent applies preliminary action by pre-assembling the device components up to the point of battery insertion. All components except the battery are assembled and sterilized together as a complete unit, maintaining regulatory compliance. The battery is then separately inserted just before use, achieving rapid assembly without violating manufacturing or shipping regulations for battery-containing medical devices.
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 retractor provides focused illumination, minimizes glare, enhances visibility, and allows quick assembly, while ensuring safe battery disposal and improved thermal dissipation.
Implementation Method 1
a flexible circuit board with multiple light sources
Implementation Method 2
multiple light sources angled to maximize illumination on the desired surgical field
Implementation Method 3
a cover with openings for light sources, and a smoke evacuation channel
Data Source
AI summary
A surgical retractor comprising a blade having first and second opposing surfaces, and a handle extending from a proximal end of the blade, wherein the first surface of the blade includes a non-slip texture having a preferential grip in a first direction corresponding to direction of extraction of the surgical retractor from an incision and having a minimal or no grip in a second direction opposite to the first direction and in a third direction transverse to the first and second directions.