Multi-Probe Surgical Registration for Bone and Cartilage Surfaces
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Solution Overview
Problem
Existing bone registration methods in surgical navigation systems are cumbersome, prone to errors due to manual point collection, and fail to accurately capture soft tissue information, leading to increased surgical time and registration errors.
Innovation Solution
A registration device and method that simultaneously collects multiple point data from both bone and cartilage surfaces using a combination of pointed and blunt probes, allowing for accurate surface fitting and spatial registration, reducing manual intervention and improving data accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a probe with a target trackball is used to perform single-point collection of the bone, then the registration can be completed, but the procedure becomes cumbersome and surgical time increases
Solution Approach 1:
The collection device is divided into multiple independent probe units (pointed probes and blunt probes) arranged in arrays. Each probe can independently collect point data, allowing simultaneous multi-point collection instead of sequential single-point collection, thereby reducing surgical time while maintaining registration accuracy
Solution Approach 2:
The device combines multiple probe types (pointed and blunt probes) into a single integrated collection device that can perform both bone surface and cartilage surface data collection simultaneously. This merging of functions eliminates the need for separate collection procedures, reducing overall surgical time
2Reliability
If manual collection of points is performed, then the registration can be completed, but misoperation may occur causing failure of registration
Solution Approach 1:
The collection device is designed to automatically contact and collect point data from the bone and cartilage surfaces without requiring manual positioning or operation. The probes self-align and self-contact the surfaces, eliminating human error in point collection while simplifying the operator's task to merely positioning the overall device
Solution Approach 2:
The manual mechanical operation of positioning and contacting points is replaced by a mechanical system where the probe arrays automatically engage with the surfaces through controlled deployment. This systematic mechanical approach reduces variability and error compared to manual operation
3Measurement precision
If a probe with a pointed end is used to pierce the soft tissue, then the bone registration can be done, but the intensity and depth of puncture are difficult to control manually
Solution Approach 1:
The probe pins are designed with dynamic control, allowing them to be deployed and retracted as needed. The pointed probes can pierce the cartilage to reach the bone surface, while the deployment depth and timing are controlled by the system rather than manual force, enabling precise control of puncture intensity and depth
Solution Approach 2:
The system changes the operational parameters of the probes by using different probe types (pointed vs. blunt) for different purposes. The pointed probes are deployed only when bone surface contact is needed, while blunt probes are used for cartilage surface contact, optimizing the interaction parameters for each tissue type
4Reliability
If existing bone registration method is used, then the bone registration can be completed, but the information of the soft tissue on the bone surface cannot be obtained
Solution Approach 1:
The collection device is designed with multi-functionality, incorporating both pointed probes for bone surface contact and blunt probes for cartilage surface contact. This universal design allows the same device to collect data from both hard bone tissue and soft cartilage tissue, obtaining comprehensive information including soft tissue characteristics that would be lost with bone-only registration
Solution Approach 2:
The system adds another dimension to the registration process by collecting data from both the bone surface and the overlying cartilage surface. This creates a multi-layered data set that includes information about the soft tissue layer, its thickness, and its relationship to the bone surface, providing a more complete anatomical model
Data Source
AI summary
The application provides a device, method and system for registration. The registration device includes a fixing member; a frame connected to the fixing member, at least one trackable element mounted on the frame; and a collection device connected to the fixing member, wherein the collection device is configured to simultaneously collect multiple point data from an object to be registered. The registration method includes obtaining simultaneously, by a registration device, a point cloud data from a surface of a cartilage of an object to be registered; and performing surface fitting based on the point cloud data to obtain a fitted surface of the cartilage of the object to be registered. The registration system includes the registration device; a first point cloud data acquisition module, configured to receive the point cloud data from the collection device; and a surface fitting module, configured for surface fitting with the point cloud data.