Integrated Screw Guide and Tissue Retractor for Spinal Surgery
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Solution Overview
Problem
During spinal surgery, there is a need for a single instrument that can guide a screw into the spine while also retracting soft tissue around the surgery area, as existing instruments are typically used separately for these purposes.
Innovation Solution
The development of an apparatus comprising a handle assembly, a screw guide, and a retractor, where the screw guide is coupled to the handle assembly via a connecting element, and the retractor is integrated with the screw guide to facilitate both screw guidance and soft tissue retraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate instruments are used for screw guidance and soft tissue retraction, then each instrument can be optimized for its specific function, but the surgical procedure becomes more complex and time-consuming due to the need to switch between multiple instruments
Solution Approach 1:
The patent combines a screw guide and a soft tissue retractor into a single integrated instrument. The screw guide portion includes a guide shaft and guide cannula for screw insertion, while the retractor portion includes a retractor blade and retractor arm. These components are connected through a connecting element that allows both functions to be performed with one instrument, eliminating the need to switch between separate screw guidance and tissue retraction instruments during spinal surgery
2Productivity
If a single integrated instrument is used for both screw guidance and soft tissue retraction, then the number of instruments is reduced and surgical efficiency is improved, but the instrument design becomes more complex
Solution Approach 1:
The integrated instrument is divided into distinct functional segments: a handle assembly, a connecting element with multiple holes, a screw guide portion with guide shaft and guide cannula, and a retractor portion with retractor blade and retractor arm. Each segment can be independently designed and manufactured, then assembled together. The connecting element serves as a pivot point that allows the screw guide and retractor to be positioned relative to each other while maintaining structural integrity
Solution Approach 2:
The instrument is designed to perform multiple functions simultaneously - guiding screw insertion and retracting soft tissue - through a single unified device. The handle assembly serves as the common control mechanism for both the screw guide and retractor portions, allowing the surgeon to coordinate both functions through a single handle operation
3Productivity
If the retractor is integrated with the screw guide, then simultaneous tissue retraction and screw guidance is achieved, but the precision of screw guidance may be compromised by the additional retractor component
Solution Approach 1:
The connecting element is designed with multiple holes that allow for adjustable positioning of the screw guide and retractor relative to each other. The pivotable connection between the screw guide portion and retractor portion allows dynamic adjustment during surgery to optimize both tissue retraction and screw guidance precision for different anatomical conditions
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
This integrated solution allows for efficient guidance of screws into the spine and simultaneous retraction of soft tissue, enhancing the precision and safety of spinal surgery by reducing the need for multiple instruments.
Implementation Method 1
The connecting portion is pivotably coupled to the connecting element through a spring loaded sleeve that engages one of a plurality of holes positioned on the connecting element
Data Source
AI summary
An apparatus is provided for performing spinal surgery having a handle assembly, a screw guide, and a retractor. A shaft is provided with a handle, a neck portion and a connecting portion. The screw guide is provided with a connecting element coupled to the connecting portion of the handle assembly. A retractor for retracting tissue is coupled to the screw guide, wherein the neck portion of the handle assembly is provided with a spring loaded sleeve adapted to engage one of a plurality of holes positioned on a portion of the connecting element. The connecting portion is pivotably coupled to the connecting element.