Self-Retaining Incision Retractor for Appendage Surgery Access
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Solution Overview
Problem
Conventional methods fail to efficiently and consistently hold open surgical incisions on appendages, leading to potential closure, tissue trauma, and disruption of surgical procedures, while also failing to maintain optimal surgical access and orientation.
Innovation Solution
A self-retaining retractor system with a handle on one side of the appendage and prongs on the opposite side, converting compressive force into expansive force to keep the incision open, featuring adjustable and rotatable prongs and a locking mechanism to maintain position and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional retractors are used to hold open a surgical incision, then the incision can be kept open, but the device is prone to dislodgement and requires constant manual adjustment
Solution Approach 1:
The retractor is designed with a self-retaining mechanism where the handle on the dorsal side and prongs on the volar side create a self-locking configuration. The mechanical linkage automatically maintains the incision open without requiring continuous manual adjustment, as the device sustains its own position through its structural design.
Solution Approach 2:
The retractor incorporates a dynamic mechanical linkage with pivot joints that allow the device to adapt to tissue movement while maintaining stable incision holding. The linkage can dynamically adjust to changes in tissue position while keeping the incision open, preventing dislodgement without manual intervention.
2Reliability
If excessive force is applied to hold the incision open, then the incision remains open, but tissue trauma and ischemia increase
Solution Approach 1:
The retractor distributes the holding force across multiple contact points: the handle on the dorsal side and multiple prongs on the volar side. This localizes and distributes the mechanical interaction, preventing concentrated pressure on any single tissue area, thereby reducing localized trauma and ischemia risk while maintaining reliable incision patency.
3Ease of operation
If the appendage rotates during surgery, then the surgical orientation changes, but the surgical access and incision orientation are compromised
Solution Approach 1:
The retractor is positioned and secured on the appendage before the surgical procedure begins. The handle is placed on the dorsal side and prongs on the volar side, establishing a fixed reference frame that prevents appendage rotation during surgery. This preliminary positioning maintains consistent surgical orientation throughout the procedure.
4Productivity
If the incision closes partially during surgery, then surgical access is lost, but instruments may be dislodged and procedure interrupted
Solution Approach 1:
The self-retaining retractor continuously maintains incision openness through its mechanical design, preventing partial closure during surgery. The device automatically sustains the incision in an open state without requiring ongoing manual intervention, ensuring continuous surgical access and preventing instrument dislodgement that would interrupt the procedure.
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 maintains surgical access and reduces tissue trauma by keeping the incision open, minimizing dislodgement, and allowing for efficient surgical procedures with reduced pressure on tissue.
Implementation Method 1
The pair of members and the pivot joint can convert the compressive force into expansive force between two prongs of the retractor that are disposed in the surgical incision
Data Source
AI summary
A system or method can hold open a surgical incision or other cut or tissue opening on one side of an appendage via actuation initiated or occurring on an opposite side of the appendage. A device, such as a retractor, can extend at least partially about the appendage and can convey, transmit, or carry motion and/or force between the two sides of the appendage. For example, a surgeon or other user can squeeze a retractor handle that is disposed on the opposite side of the appendage. Responsive to the squeeze, the retractor can apply opening motion and/or force to the incision, so as to hold the incision open during surgery or some other procedure.