Stent Delivery Catheter With External Electrode Access
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Solution Overview
Problem
Conventional stentrodes are limited to inside the blood vessels, restricting the range and quality of signal collection and stimulation, necessitating improved access both inside and outside the blood vessels for more precise physiological and electrophysiological signal detection and stimulation.
Innovation Solution
A stent delivery system comprising a vascular penetration catheter with a stent-electrode combination, allowing direct contact with the blood vessel wall and featuring a bent tip for external access, along with a hemostatic component and electrode wires for external signal detection and stimulation, and adjustable directional cannulas for precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional stentrodes are used inside blood vessels, then the device can be implanted without open-brain surgery, but the range and quality of signal collection is limited
Solution Approach 1:
The device is divided into two functional parts: electrodes that remain inside the blood vessel for stable implantation, and extendable electrode wires that can reach outside the vessel. This segmentation allows the device to simultaneously maintain vascular stability while extending signal collection range to external brain tissue.
Solution Approach 2:
The invention transitions from a one-dimensional intra-vascular placement to a three-dimensional configuration by extending electrode wires from the vessel lumen through the vessel wall to external brain tissue. This dimensional expansion enables signal collection from multiple spatial locations simultaneously.
2Adaptability or versatility
If the catheter tip is bent to access outside the blood vessel, then external signal detection is enabled, but the device complexity increases
Solution Approach 1:
The catheter incorporates a bent tip design that provides dynamic positioning capability, allowing the electrode wires to be directed at specific angles toward the vessel wall. This dynamic geometric configuration enables targeted external access without requiring complex mechanical actuation systems.
3Adaptability or versatility
If electrode wires are extended outside the blood vessel, then signal collection range is improved, but the risk of electrode dislocation and damage increases
Solution Approach 1:
The electrode wires are nested within the catheter structure during delivery, protecting them from damage. Upon deployment, the wires extend controlled paths from the vessel lumen through the vessel wall to external tissue, maintaining protection while enabling external access. The stent provides an additional nested protective framework.
Solution Approach 2:
The vessel wall serves as a localized protective barrier that anchors the electrode wires at specific penetration points. This localized structural support provides mechanical stability to the wires where they transition from the vascular space to external tissue, reducing dislocation risk while maintaining external access capability.
Data Source
AI summary
A catheter device includes a microguidewire for stent deployment, which is equipped with a stent having electrodes attached inside, and a microcatheter for vascular penetration. A movement path is formed to allow the stent-rod complex deployment microcatheter to penetrate and move, a guide catheter with a movement path formed to allow the stent-rod complex deployment microcatheter to penetrate and move; and a sheath connected to the rear end of the guide catheter, with an insertion path formed for inserting the stent-rod complex deployment microcatheter into the guide catheter. The vascular penetration microcatheter is curved so that its distal end faces outward, and it has a movement path through which an electrode wire can penetrate and move, allowing it to detect electrophysiological signals/activity or apply electrical stimulation not only inside but also outside the blood vessels, enabling more accurate diagnosis and treatment.