Surgical Retractor Drive Mechanism Angulation Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional surgical procedures often cause significant trauma to tissues due to extensive incisions, muscle stripping, and prolonged retraction, leading to prolonged recovery times and severe post-operative pain, with a need for more effective tissue retraction devices and methods.
Innovation Solution
A retractor assembly with movable retractor members that can be pivoted and translated along a support member, featuring a drive mechanism for infinite angulation adjustments, a locking mechanism, and a biasing member to facilitate easy engagement and minimize tissue trauma, allowing for a tapered working channel to reduce tissue retraction and enhance surgical access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional surgical procedures are used to access locations within the body, then surgical access is achieved, but significant trauma is caused to intervening tissues
Solution Approach 1:
The retractor assembly is divided into multiple retractor members (first retractor member, second retractor member) that can be independently positioned and adjusted. This segmentation allows the device to access deep surgical locations while distributing tissue contact forces across multiple contact points, reducing concentrated trauma to individual tissue structures.
Solution Approach 2:
The retractor members are designed with movable and adjustable characteristics, allowing dynamic repositioning during surgery. The drive mechanism enables continuous adjustment of retractor member positions and angles, permitting the surgeon to optimize tissue retraction in real-time while minimizing trauma to intervening tissues throughout the procedure.
2Ease of operation
If extensive muscle stripping and prolonged retraction are performed, then surgical access is improved, but recovery time and post-operative pain increase
Solution Approach 1:
The retractor assembly enables precise control over retraction parameters including the angle of retraction, position along the support member, and force applied to tissues. The drive mechanism allows for infinitely small adjustments in angulation, enabling the surgeon to optimize tissue retraction to the minimum necessary degree while maintaining adequate surgical access, thereby reducing tissue trauma and subsequent recovery time.
Solution Approach 2:
The biasing member automatically returns the retractor member to a neutral position when the drive mechanism is released, reducing the need for manual repositioning and minimizing the time required to adjust retraction settings during surgery. This self-returning feature allows for more efficient surgical procedures with less prolonged retraction time.
3Device complexity
If fixed angle retraction devices are used, then device complexity is reduced, but adaptability to different surgical locations and requirements is limited
Solution Approach 1:
The retractor assembly incorporates a drive mechanism that transforms rotational motion into linear motion, enabling continuous angular adjustment of retractor members. This dynamic adjustment capability allows the device to adapt to various surgical locations and tissue types while maintaining a relatively simple overall structure through the use of standardized mechanical components.
Solution Approach 2:
The system allows for continuous variation of the retraction angle parameter through the drive mechanism, enabling adaptation to different surgical requirements without requiring multiple fixed-angle devices. The translation mechanism and lever mechanism work together to provide versatile positioning while maintaining structural simplicity.
4Ease of operation
If protruding components are included in the housing for drive mechanism access, then ease of operation is improved, but interference with surgeon and instruments during surgery occurs
Solution Approach 1:
The drive mechanism components are nested within the housing assembly, with the drive mechanism recessed into or flush with the housing surface. This nested configuration allows the surgeon to control the retractor assembly without protruding components interfering with the surgical field, while still providing access to control elements through recessed openings or flush-mounted interfaces.
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 assembly reduces tissue trauma and enhances surgical access by providing infinitely adjustable angulation and a tapered working channel, minimizing muscle retraction and allowing greater visualization and instrument placement, thereby reducing recovery time and post-operative pain.
Implementation Method 1
The housing assembly can include a biasing member to bias the retractor member from a pivoted position toward a neutral position
Data Source
AI summary
A retractor assembly for surgery in a patient includes at least one retractor member removably engageable to a support member. The retractor assembly includes a housing assembly engaged to the support member and to an arm that extends from a retraction portion of the retractor member. A drive mechanism in the housing assembly is coupled to the retractor member and is operable to rotate the retraction portion of the retractor member relative to the support member to a desired angular orientation.