Tissue Access Needle Stabilization With Deployable Helical Wire
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current needle devices require significant manual manipulation or assistance to secure the needle at a desired location within a patient's body, leading to issues such as dislodgement and impaired procedure quality in medical procedures like intranodal lymphangiography and neurological procedures.
Innovation Solution
A needle device with a stabilizing wire having a helical portion that protrudes from the needle aperture to engage tissue, secured by a slide mechanism on the hub, allowing for easy stabilization and fluid introduction through the needle lumen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a needle is used to access tissue at a desired location, then fluid can be introduced into the tissue, but the needle is easily dislodged and moves around
Solution Approach 1:
The needle device is segmented into distinct functional components: a needle portion for tissue access, a stabilizing wire for securing the needle, and a hub for deployment control. This segmentation allows each component to perform its specific function independently, improving overall reliability while simplifying operation.
Solution Approach 2:
The stabilizing wire is pre-positioned within the needle lumen and ready for deployment. The helical portion of the stabilizing wire is pre-formed to automatically engage tissue upon deployment, eliminating the need for complex manual manipulation to secure the needle during the procedure.
2Reliability
If a stabilizing wire is deployed to secure the needle, then needle dislodgement is minimized, but the device complexity increases
Solution Approach 1:
The stabilizing wire is nested within the needle lumen during insertion and storage. Upon deployment, the wire is pushed through the needle aperture where the helical portion expands outward to engage tissue. This nesting approach minimizes device complexity while maintaining reliable needle positioning.
Solution Approach 2:
Instead of using a complex locking mechanism to prevent needle dislodgement, the invention inverts the approach by using a simple deployable wire that actively anchors the needle to tissue through its helical portion, achieving stability with minimal structural complexity.
3Ease of operation
If manual manipulation is used to secure the needle, then the procedure can be performed with simpler devices, but procedure quality is impaired
Solution Approach 1:
The stabilizing wire with its helical portion performs self-service by automatically engaging the tissue upon deployment. The helical geometry naturally provides anchoring force without requiring precise manual manipulation, thereby maintaining procedure quality while preserving ease of operation.
Data Source
AI summary
Needle devices for accessing tissue at a desired location within a patient's body in order to deliver biologic, chemical or other therapeutic agents to the tissue, or obtain a sample of the tissue, or to obtain a sample of body fluid or otherwise drain body fluid from the body of a patient, and secured after access to the tissue node is described. The needle device includes a hub, a needle and a stabilizing wire. Securing the needle can be accomplished via stabilizing wire with a helical tissue engagement portion, which can be introduced via an open needle tip or a lumen aperture. The stabilizing wire may be attached to a slidable trigger on the hub. Fluid can be introduced into the needle device through an injection port in the hub with an extension element thereon.