Acetabular Component Alignment via Radiopaque Guide Lines
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Solution Overview
Problem
In minimally invasive hip surgery, conventional instruments often damage soft tissues and there is a risk of incorrectly positioning the acetabular component, particularly in terms of anteversion and abduction, which can lead to improper hip joint orientation.
Innovation Solution
The use of intra-operative fluoroscopy and radiopaque guide lines on the acetabular component to measure and ensure proper alignment, preventing retroversion or over-anteversion through predetermined alignment of guide lines on the anterior and posterior surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If minimally invasive surgery is used, then tissue damage and blood loss are reduced, but the risk of incorrect component positioning increases
Solution Approach 1:
The patent introduces radiopaque guide lines as intermediary elements that are disposed on the acetabular component. These guide lines serve as mediators between the surgical instrument and the imaging system, allowing indirect visualization of component orientation through fluoroscopy without requiring direct visual access or large incisions.
Solution Approach 2:
The patent replaces direct mechanical visualization and alignment methods with radiographic imaging. Instead of relying on mechanical guides or direct visual inspection that would require larger exposures, the system uses fluoroscopy to capture images of the radiopaque guide lines, substituting optical-mechanical alignment with radiographic measurement.
2Length of moving object
If conventional instruments are used in MIS surgery, then smaller incisions are possible, but soft tissue damage increases
Solution Approach 1:
The radiopaque guide lines act as intermediaries that transmit alignment information through the tissue to the imaging system. This allows the surgeon to maintain small incisions while still achieving accurate component positioning through fluoroscopic guidance of the guide lines.
3Measurement precision
If post-operative measurement systems are used, then anteversion and abduction can be measured, but surgical time is extended and patient recovery is delayed
Solution Approach 1:
The radiopaque guide lines are pre-disposed on the acetabular component before implantation. This preliminary preparation allows alignment verification to be performed immediately during the surgical procedure through fluoroscopy, eliminating the need for separate post-operative measurement procedures and reducing overall treatment time.
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 method allows for accurate intra-operative measurement and alignment of the acetabular component, reducing tissue damage and the risk of improper positioning, thereby enhancing surgical precision and patient outcomes in minimally invasive hip surgery.
Implementation Method 1
The systems and methods utilize intra-operative fluoroscopy and/or intra-operative radiographs to measure the anteversion or abduction of the acetabular component
Data Source
AI summary
An acetabular component anteversion and abduction measurement system, comprising: an acetabular component; one or more radiopaque guide lines disposed on or adjacent to a posterior surface of the acetabular component; and one or more radiopaque guide lines disposed on or adjacent to an anterior surface of the acetabular component; wherein predetermined alignment of selected of the one or more anterior guide lines with selected of the one or more posterior guide lines under intra-operative fluoroscopy or radiography indicates proper surgical alignment of the acetabular component within the anatomy of a patient. Proper surgical alignment means that the acetabular component is not retroverted or overly anteverted or abducted within the anatomy of the patient.