Modular Fluoro-Navigation Instrument Tracker Displacement
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Solution Overview
Problem
Conventional fluoro-navigation instruments face challenges in maintaining accurate navigation data due to the risk of the optical tracker being displaced by medical staff during surgical procedures, and the potential obstruction of the localization system's field of view by medical staff, especially in orthopedic and spine surgeries.
Innovation Solution
A modular fluoro-navigation instrument featuring a radiotransparent base with a tracker and a separate registration phantom, both with reproducible fixation means, allowing for secure attachment to the patient's bone and minimizing the risk of displacement, while the registration phantom's detachability and unique positioning enhance image registration accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the optical tracker is mounted on a protruding member at the end of the base, then the tracker is kept away from the surgical intervention area, but the medical staff may accidentally hit the tracker or protruding member causing displacement and rendering navigation data irrelevant
Solution Approach 1:
The optical tracker is extracted from the base structure and integrated into the registration phantom assembly. The registration phantom can be detached from the base after use, completely removing the tracker from the surgical field. This eliminates the hazard of the tracker protruding into the surgical area while maintaining its functionality during the registration phase.
Solution Approach 2:
The system transitions from a static tracker permanently mounted on the base to a dynamic configuration where the tracker is part of a removable registration phantom. The phantom can be attached during registration and detached during surgery, adapting the system state to different operational phases and eliminating the protruding hazard during critical surgical operations.
2Measurement precision
If the X-ray imaging device is equipped with an optical tracker at a large distance from the patient's tracker, then the field of view of the localization system cameras may be obstructed by medical staff during surgical intervention
Solution Approach 1:
The patient tracker and registration phantom are merged into a single integrated assembly that is positioned close to the surgical site. This combined unit maintains the precise spatial relationship between the tracker and the anatomical reference points while minimizing the distance that could cause field of view obstruction, as the entire assembly can be positioned optimally near the patient.
Solution Approach 2:
The registration phantom serves as an intermediary between the patient's anatomy and the optical tracker. It provides the necessary registration markers for accurate navigation while allowing the tracker to be positioned in a location that minimizes obstruction of the camera field of view during surgical procedures.
Data Source
AI summary
A modular fluoro-navigation instrument including a base made of a substantially radiotransparent material. The base is intended to be rigidly secured to a patient's bone and a tracker rigidly attachable to the base. The instrument has a registration phantom separate from the tracker which includes a plurality of radiopaque fiducials. The base and the registration phantom includes respective attachment members for reproducibly attaching the registration phantom to the base.