Rack-and-Pinion Lung Retractor for Assistant-Free Hilum Exposure
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Solution Overview
Problem
Existing lung transplantation procedures require multiple surgical assistants for vertical retraction of the chest wall, leading to fatigue, crowded surgical fields, and prolonged surgical times due to the use of bulky handheld retractors.
Innovation Solution
A surgical retractor system with a rack and pinion assembly and adjustable tissue stabilizers, allowing for maximum vertical retraction and exposure of the proximal hilum during lung transplantation, reducing the need for additional assistants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple surgical assistants use bulky handheld retractors for vertical retraction, then the chest wall can be retracted to expose the proximal hilum, but the surgical field becomes crowded and surgical assistants experience fatigue
Solution Approach 1:
The patent combines multiple retraction functions into a single integrated device. The bilateral retractor system merges the functions of multiple handheld retractors into one unified apparatus that can be operated by a single surgeon, eliminating the need for multiple assistants while maintaining adequate exposure of the surgical field
Solution Approach 2:
The retractor device is designed with multi-functionality to perform various retraction tasks. The adjustable blades and multiple engagement points allow the single device to replace multiple specialized handheld retractors, providing both vertical and lateral retraction capabilities in one instrument
2Area of stationary object
If multiple surgical assistants are used to provide vertical retraction, then adequate exposure is achieved, but surgical time increases due to coordination and positioning
Solution Approach 1:
The retractor system is designed to be self-adjusting and self-positioning. The mechanical linkage and adjustable components allow the device to maintain optimal retraction positions automatically, reducing the time needed for continuous positioning adjustments that would otherwise require multiple assistants throughout the procedure
3Area of stationary object
If adjustable retraction is provided to maximize exposure, then the proximal hilum can be effectively exposed, but the device structure becomes more complex
Solution Approach 1:
The retractor employs dynamic adjustment mechanisms that allow the blades to be positioned at various angles and depths. This dynamic capability provides customizable retraction to maximize hilum exposure while the modular design keeps the overall structure manageable through standardized components and adjustment mechanisms
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
Facilitates optimal surgical exposure and reduces the number of assistants required, enhancing surgical efficiency and outcome by providing customizable retraction and stabilization of the surgical site.
Implementation Method 1
a rack and pinion assembly including a rack bar having a first longitudinal axis, a slide end, a first blade end, and a longitudinal edge therebetween with teeth formed therein
Data Source
AI summary
A surgical retractor device includes at least two retractor blades slidably attached by a tooth and gear mechanism, the blades having concave surfaces facing away from one another. The first concave retractor blade can be joined to a first end of a first bar that has a serrated edge The second concave retractor blade can be joined to a first end of a bar arm that has the gear mechanism at its opposite end. The gear mechanism includes a handle with a gear which causes the first bar to slidably move along the second bar. Each bar can include a housing with a fastener that can receive stabilizers.