Cam-Locking Joint Clamp for Stable Surgical Retractor Positioning
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Solution Overview
Problem
Conventional surgical retractor systems face challenges in providing stable and adjustable support for retractor blades during surgical procedures, leading to potential movement and instability, which can hinder clear access to the surgical site.
Innovation Solution
The surgical retractor system incorporates adjustable rail clamps, posts, cross bars, extension arms, and multi-directional joint clamps with a cam lever mechanism that allows for secure locking and unlocking of retractor blades, utilizing a combination of scissors and circle clamps with springs to provide a clip-on and anti-rise-up feature, ensuring stable positioning and easy adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional surgical retractor systems are used, then the structure is simple and easy to manufacture, but the system lacks stability and adjustability, leading to potential movement during surgery
Solution Approach 1:
The joint clamp incorporates a cam lever mechanism that enables dynamic adjustment of the retractor blade position while maintaining stability when locked. The cam lever can be moved between locked and unlocked positions, allowing the system to transition from a static to a dynamic state for adjustment purposes.
Solution Approach 2:
The retractor system is divided into modular components including the rail clamp, frame, multiple joint clamps, and retractor blades. Each joint clamp functions as an independent adjustable unit, allowing individual positioning of blades while maintaining overall system stability.
2Adaptability or versatility
If conventional fixed support systems are used, then the device complexity is low, but the system lacks adjustability and cannot maintain clear access to the surgical site
Solution Approach 1:
The cam lever mechanism provides dynamic adjustability by allowing the joint clamp to be easily moved between locked and unlocked states. This enables the retractor blades to be positioned at different locations along the frame while maintaining firm fixation when locked, achieving both adaptability and operational simplicity.
Solution Approach 2:
The spring-loaded clip-on feature automatically engages with the frame when the cam lever is in the locked position, providing self-securing functionality without requiring additional fastening operations. The spring maintains constant pressure to ensure reliable engagement.
3Reliability
If conventional clamping mechanisms are used, then the ease of operation is moderate, but the system allows movement and lacks secure locking capability
Solution Approach 1:
The cam lever provides a simple binary operation mode - moving the lever between two positions (locked and unlocked) achieves secure fixation or release. This dynamic switching mechanism simplifies operation while ensuring reliable locking through the cam's geometric locking action combined with spring pressure.
Solution Approach 2:
The conventional multi-step mechanical fastening system is replaced with a cam-based locking mechanism that uses geometric locking combined with spring pressure. This substitution reduces the number of operational steps required while maintaining secure locking capability.
4Ease of operation
If conventional retractor systems are used, then the device complexity is low, but the system cannot provide stable positioning and clear access to the surgical site
Solution Approach 1:
The framework is segmented into modular components (rail clamp, frame, joint clamps, blades) that can be independently adjusted and positioned. This segmentation allows the surgeon to optimize the position of each blade separately, improving access efficiency while keeping each individual component relatively simple in design.
Solution Approach 2:
The dynamic cam lever mechanism enables quick adjustment of blade positions during surgery, allowing the surgical team to optimize access to the surgical site as needed without requiring complex reconfiguration procedures. The system transitions easily between fixed and adjustable states.
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 effectively secures retractor blades to the surgical table, reducing movement and enhancing the surgeon's access by providing a stable and adjustable framework that maintains clear access to the surgical site, thereby improving the efficacy of the surgical procedure.
Implementation Method 1
joint clamps with a cam lever mechanism that allows for secure locking and unlocking of retractor blades
Implementation Method 2
combination of scissors and circle clamps with springs to provide a clip-on and anti-rise-up feature
Data Source
AI summary
A joint clamp for a surgical retractor system includes clamps, a cam bolt, and a cam lever. The cam bolt passes through the clamps. A cam lever comprising a cam head pivotally attached an upper portion the cam bolt to permit rotation between a locked position and an unlocked positions. The joint clamp may include springs which provide a scissors clamp of the clamps with a clip-on feature in which the scissors clamp may clipped-on and clipped-off an object such as a frame member, table post, or retractor handle. The springs may further prevent or reduce a rising movement of the clamps when the cam lever rotates from an unlocked state to a locked state.