Resection Instrument Template Contour Following
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Solution Overview
Problem
Current arthroscopic approaches for hip joint surgery face challenges in accurately identifying and removing bone irregularities due to distorted images and difficult maneuverability, leading to inefficiencies and potential iatrogenic damage during procedures.
Innovation Solution
A surgical instrument with a shaft and a template connected by a resiliently flexible member, allowing the template to follow joint contours, equipped with a burr or radio frequency electrode for precise tissue resection, and control means for selective activation to minimize collateral damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If arthroscopic approach is used to remove bone irregularities, then less iatrogenic damage and quicker rehabilitation are achieved, but accurate identification and removal of bone irregularities becomes difficult due to distorted images and difficult maneuverability
Solution Approach 1:
A template is introduced as an intermediary tool that fits over the femoral head to provide a reference framework. The template includes markers that align with specific anatomical locations, allowing the surgeon to indirectly identify bone irregularities through marker positioning rather than direct visualization, thus solving the problem of distorted arthroscopic images
Solution Approach 2:
The invention replaces the reliance on direct arthroscopic visualization (optical system) with a mechanical reference system using the template and markers. The mechanical alignment of markers with anatomical landmarks provides accurate spatial reference without being affected by image distortion, enabling precise identification of irregularities
2Object-affected harmful factors
If arthroscopic approach is used to remove bone irregularities, then less iatrogenic damage and quicker rehabilitation are achieved, but the procedure becomes less efficient due to difficulty in maneuvering and determining resection amount
Solution Approach 1:
The template is pre-configured with markers positioned at specific anatomical locations before the procedure. This preliminary setup provides immediate reference during surgery, eliminating the need for time-consuming intraoperative adjustments and allowing the surgeon to quickly determine the extent of resection needed based on marker alignment
Solution Approach 2:
The template serves multiple functions simultaneously: it provides anatomical reference, indicates resection depth, guides instrument positioning, and marks irregularity locations. This multi-functionality consolidates several separate steps into one tool, significantly improving procedural efficiency
3Stability of the object's composition
If template is made rigid relative to shaft, then structural stability is improved, but ability to follow joint contours and adapt to curvature changes is reduced
Solution Approach 1:
The connection between template and shaft is made dynamic rather than static. The resiliently flexible member allows the template to dynamically adapt its position and orientation to match the joint contours while maintaining stable attachment to the shaft, enabling both stability and adaptability simultaneously
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
Enables accurate and selective removal of bone and cartilage irregularities, reducing procedure time and iatrogenic damage, facilitating quicker rehabilitation with less risk of joint dislocation.
Implementation Method 1
the template is connected or coupled to, or formed at the distal end of the shaft by a resiliently flexible member. Suitably, the resiliently flexible member is configured to bias the template towards the tissue surface
Implementation Method 2
the resecting means is a burr
Implementation Method 3
the resecting means comprises a radio frequency electrode
Data Source
AI summary
The present invention concerns a surgical instrument. There is described a surgical instrument including a shaft having a handle towards a proximal end, a template towards a distal end, and resecting means for removing tissue. The template is shaped to complement the contours of a joint surface.