Surgical Tracing Platform for Hip Replacement Pose Data Accuracy
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Solution Overview
Problem
Current surgical tracking systems face challenges in accurately determining surgical parameters, such as leg length during hip replacement surgery, due to limitations in precision and reliability of pose data capture and processing.
Innovation Solution
A tracing platform with a defined path for surgical instruments, attached to the patient's anatomy using geometric features and attachment mechanisms like spikes or bone screws, generates pose data that is processed by an intra-operative computing unit to calculate precise location and parameters, with error validation and redundancy to enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional tracking systems are used to capture pose data, then the surgical procedure can be performed, but the accuracy of surgical parameter calculations is insufficient
Solution Approach 1:
The system performs preliminary actions by having the surgical instrument trace a predefined path on the tracing platform before the actual surgical measurement. This preliminary tracing establishes a known reference framework that improves the accuracy of subsequent pose data capture and surgical parameter calculations.
Solution Approach 2:
The system implements feedback mechanisms where the computing unit receives pose data from the tracing process, validates it against the predefined path, and uses this feedback to refine and improve the accuracy of surgical parameter calculations. The redundant trace data is processed to eliminate bias, providing continuous feedback for enhancement.
2Measurement precision
If more pose data is collected through redundant tracing, then the accuracy improves, but the time required for data processing increases
Solution Approach 1:
The system deliberately collects excessive pose data by having the instrument trace the predefined path multiple times (redundant tracing). This partial repetition ensures sufficient data points for accurate calculations while the computing unit efficiently processes only the necessary data to eliminate bias and determine the final surgical parameters.
3Measurement precision
If a tracing platform with predefined path is used, then the measurement accuracy improves, but the device complexity increases
Solution Approach 1:
The system segments the measurement process into distinct components: a tracing platform with a predefined path, a surgical instrument for tracing, and a computing unit for processing. This segmentation allows each component to be optimized independently while working together to achieve high measurement accuracy without overwhelming complexity.
Solution Approach 2:
The tracing platform acts as an intermediary between the surgical instrument and the computing unit. It provides a predefined path that mediates the interaction, converting the instrument's movements into structured pose data that the computing unit can process to determine accurate surgical parameters.
Data Source
AI summary
There is provided a tracing platform configured to rigidly attach to an anatomy of a patient that has at least one surface configured to provide a defined path (represented by path definition data) for tracing by a surgical instrument. An intra-operative computing unit receives pose data for the instrument when tracing the path and calculates a location of the defined path using the pose data and the path definition data. A change in location may be determined from pose data of different traces. Tracing the defined path generates a plurality of pose data which may increase accuracy of the location calculations. Redundant trace data may be received to eliminate bias. A geometric feature (e.g. V-groove), shape and/or magnetic properties of the platform may assist with tracing. The platform may rigidly attach to a bone using at least one of spikes, a bone screw, a cerclage wire, and a bone clamp.