Needle Holder Lateral Release Mechanism for Image-Guided Intervention
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Solution Overview
Problem
Conventional needle holders in image-guided interventions restrict the radiologist's ability to easily disconnect and remove the needle holder during procedures, requiring the needle to be fully retracted, which limits flexibility and increases complexity.
Innovation Solution
A needle holder with a releasable clip mechanism that allows lateral movement for disengagement from the guide arrangement, enabling the needle holder to be disconnected at any point along the needle's length without moving the needle, providing flexibility and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the needle holder uses a fixed connection mechanism, then the needle is stable and guided accurately, but the needle holder cannot be easily disconnected during the procedure
Solution Approach 1:
The connection mechanism transitions from a static fixed state to a dynamic releasable state. The clip can be engaged to secure the needle holder to the needle during the procedure, and disengaged when removal is needed, allowing the system to adapt between stability and ease of disconnection based on procedural requirements.
Solution Approach 2:
The needle holder is divided into separable components: the clip, the guide arrangement, and the needle. This segmentation allows the clip to be independently engaged or disengaged from the needle, enabling easy disconnection without affecting the integrity of the other components during the procedure.
2Adaptability or versatility
If the needle holder requires full needle retraction for removal, then the connection is secure, but the procedure complexity increases and flexibility is reduced
Solution Approach 1:
The release mechanism allows the needle holder to be dynamically adjusted between attached and detached states without requiring needle retraction. This provides procedural flexibility while maintaining simplicity, as the clip can be quickly engaged or disengaged at any point during the procedure.
Solution Approach 2:
By separating the clip from the needle shaft, the system allows independent manipulation of the needle holder components. The clip can be removed from the guide arrangement without affecting the needle position, simplifying the removal process and reducing procedural complexity.
3Manufacturing precision
If the clip is tightly secured to the guide arrangement, then the needle positioning is precise, but the clip cannot be easily released for needle removal
Solution Approach 1:
The clip incorporates a dynamic release mechanism that maintains a secure engaged state for precise needle positioning, while allowing easy disengagement through lateral movement. The resilient material enables the clip to flex during engagement for precision, then release smoothly when needed.
Solution Approach 2:
The clip's physical state changes from a constrained engaged position (providing precise positioning) to a released state (allowing easy removal). The resilient material properties enable this parameter change, allowing the clip to maintain force during engagement while permitting controlled release through lateral movement.
Data Source
AI summary
A needle holder for use in an image guided intervention procedure. The needle holder includes a clip for holding a needle and a guide arrangement for supporting the clip and directing the needle at a desired angle relative to a patient's body. The clip includes a releasable connection such that the needle can be disengaged from the guide arrangement by a lateral movement of the clip and/or the guide arrangement relative to the longitudinal axis of the needle.