MRI Trajectory Guide Frame Scalp Compression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current MRI-guided surgery systems face challenges in securely mounting trajectory guide frames directly to patients, particularly on the skull, without causing tissue compression or requiring extensive scalp removal.
Innovation Solution
An MRI-guided interventional system comprising a base with patient engagement structures and fasteners, such as screws, that penetrate the scalp to secure the base to the skull, allowing the trajectory guide frame to position a targeting cannula for precise device placement, while spacing the base from the skull to prevent tissue compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base is secured directly to the skull using fasteners, then secure mounting is achieved, but scalp tissue compression occurs
Solution Approach 1:
The patent introduces patient engagement structures as intermediary elements between the base and the skull. These structures penetrate the scalp and engage with the skull, thereby mediating the connection and distributing the securing force to prevent direct compression of the scalp tissue while maintaining reliable mounting.
Solution Approach 2:
The mounting system is segmented into distinct functional components: the base, the patient engagement structures (which include scalp-penetrating elements), and the fasteners. This segmentation allows each component to perform its specific function - the engagement structures handle tissue interaction while the fasteners provide secure attachment to the skull.
2Reliability
If extensive scalp removal is performed to secure the frame, then secure mounting is achieved, but surgical complexity and tissue damage increase
Solution Approach 1:
The patient engagement structures serve as intermediaries that enable secure mounting without requiring extensive scalp removal. These structures penetrate through the scalp to engage with the skull, providing a reliable attachment mechanism that eliminates the need for extensive tissue removal and reduces surgical complexity.
3Stability of the object's composition
If the base is placed in direct contact with the skull, then mounting stability is improved, but scalp tissue is compressed
Solution Approach 1:
The patient engagement structures act as mediators that maintain mounting stability while preventing direct contact between the base and the scalp. By penetrating the scalp and engaging with the skull, these structures provide stable anchoring without compressing the scalp tissue.
Solution Approach 2:
The engagement structures extend in a dimensional sense by penetrating through the scalp layer to reach the skull. This vertical dimensionality allows the base to be stabilized on the skull while maintaining separation from the scalp, resolving the contradiction between stability and tissue compression.
Data Source
AI summary
An MRI-guided interventional system for use with a patient and an interventional device includes a base, a trajectory guide frame, and a mounting device. The base is configured to be secured to a body of the patient. The trajectory guide frame includes a targeting cannula. The targeting cannula has an elongate guide bore extending axially therethrough, defining a trajectory axis, and being configured to guide placement of the interventional device. The trajectory guide frame is operable to move the targeting cannula relative to the base to position the trajectory axis to a desired intrabody trajectory to guide placement of the interventional device in vivo. A plurality of patient engagement structures are provided on the base and are configured to penetrate tissue of the body and to space the base apart from the tissue. The system further includes a plurality of fasteners configured to secure the base to the body.