Dual-Stage X-Y Sliding Tables for Precise DBS Trajectory Alignment
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Solution Overview
Problem
Existing surgical technologies for implanting therapy devices in the brain face challenges in achieving precision-guided alignment with reduced patient discomfort and ease of surgical access, particularly in stereotactic neurosurgery.
Innovation Solution
A trajectory guiding apparatus with a dual-stage slider assembly that allows independent translational and rotational movement of an instrumentation column, comprising a base plate, legs, and a dual-stage slider assembly with spherical bearings, enabling precise alignment and implantation of medical devices through a burr hole in the cranium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If large classical metal frames are used to encompass the entire head, then trajectory alignment precision is improved, but patient discomfort and surgical access difficulty increase
Solution Approach 1:
The large classical metal frame is segmented into a smaller microframe platform that is placed only over the entry site rather than encompassing the entire head. This segmentation maintains the necessary structural support for precise trajectory alignment while significantly reducing the volume and weight of the device, thereby decreasing patient discomfort and improving surgical access.
2Measurement precision
If large classical metal frames are used to encompass the entire head, then trajectory alignment precision is improved, but surgical access ease deteriorates
Solution Approach 1:
The frame is segmented from a full-head encompassing structure to a localized microframe platform positioned only at the entry site. This allows surgeons to access other areas of the head more easily while the microframe maintains precise trajectory alignment for the specific implantation site.
Solution Approach 2:
The unnecessary portions of the large frame that encompass the entire head are extracted and removed, leaving only the essential microframe structure at the entry site. This extraction eliminates obstacles to surgical access while preserving the functional capability for precise trajectory guidance.
3Object-affected harmful factors
If frameless or microframe technologies are used for reduced patient discomfort, then patient comfort is improved, but trajectory alignment precision deteriorates
Solution Approach 1:
The microframe platform incorporates adjustable and movable components that allow for dynamic positioning and alignment adjustments. This enables the compact microframe to achieve precise trajectory alignment comparable to large frames while maintaining the patient comfort benefits of a minimized structure.
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
Facilitates precise and comfortable implantation of therapy devices by providing reduced patient discomfort and improved surgical access, ensuring accurate alignment and trajectory control during implantation.
Implementation Method 1
the BSS table is provided with a first funnel extending toward the burr hole and configured to contain a bottom spherical bearing having a first diameter and the TSS table is provided with a second funnel configured to contain a top spherical bearing having a second diameter
Data Source
AI summary
A trajectory guiding apparatus and one or more methods associated therewith for facilitating precision-guided alignment and implantation of a DBS therapy device in a patient. A base plate and base frame combination provides a platform for a dual-stage slider (DSS) assembly comprising a bottom stage slider (BSS) table and a top stage slider (TSS) table that each have suitably sized apertures or orifices therethrough for allowing the passage of and securely holding an instrumentation column (IC) assembly whose translational movement (i.e., sideways or forward and/or backward directions along a translational plane) and pivotal/rotational movement (i.e., around a perpendicular axis orthogonal to the translational plane and extending through a pivot or fulcrum) are independently controlled by respective slide actuators in order to properly align the IC assembly to a desired trajectory.