Powered Medical Device Deployment System with Staged Sheath Control
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Solution Overview
Problem
Current medical device deployment systems face challenges in efficiently and accurately deploying medical devices, such as stents, within bodily passages due to limitations in mechanical design and control mechanisms, which can result in incomplete or improper deployment.
Innovation Solution
A powered medical device deployment system featuring a housing with a cannula, sheath, and trigger mechanism, where the drive mechanism, comprising a motor and energy storage device, moves the sheath axially over the cannula to deploy the medical device, with indicia on the housing for distance control and optional mechanical stops for staged deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a mechanical deployment system is used, then the device structure is simple, but the deployment precision and completeness are insufficient
Solution Approach 1:
The patent replaces traditional mechanical deployment mechanisms with an electrophysiological system that uses electrical signals to control the deployment process. The powered medical device deployment system incorporates an energy storage device and circuitry that can be activated by electrical stimuli, enabling more precise control over deployment timing and progression while reducing reliance on complex mechanical linkages and actuators.
Solution Approach 2:
The system enables controlled changes in deployment parameters through electrical activation. By adjusting electrical signal characteristics (voltage, current, pulse duration), the system can precisely control the timing and sequence of deployment events, allowing for staged or sequential deployment of device components with high precision without requiring proportionally complex mechanical control systems.
2Measurement precision
If the sheath is moved manually, then the operation is simple, but the deployment accuracy and control are insufficient
Solution Approach 1:
The patent replaces manual mechanical manipulation of the sheath with an electrophysiological control system. Electrical signals trigger the controlled movement of the sheath along the delivery catheter, enabling precise positioning at the target site. The system incorporates sensors and control circuitry that provide feedback on sheath position and deployment status, enhancing placement accuracy while maintaining operational simplicity through automated control.
Solution Approach 2:
The powered medical device deployment system incorporates feedback mechanisms that monitor sheath position, deployment progress, and device response in real-time. This feedback information is used by the control system to adjust electrical stimulation parameters and sheath movement timing, ensuring accurate placement and complete deployment while simplifying operator involvement through automated closed-loop control.
3Adaptability or versatility
If a single-stage deployment is used, then the process is quick, but the adaptability to varying device lengths is limited
Solution Approach 1:
The patent implements a dynamic, multi-stage deployment capability where the sheath can be advanced and retracted in controlled increments along the delivery catheter. The electrophysiological control system allows operators to pause between stages, adjust parameters, and accommodate varying device lengths by controlling the extent of sheath movement. This dynamic approach maintains deployment flexibility while preserving overall efficiency through automated control of each stage.
Solution Approach 2:
The deployment process is segmented into multiple controllable stages, with each stage corresponding to a specific extent of sheath movement or device exposure. The powered system enables independent control of each deployment stage through separate electrical activation events, allowing adaptation to different device lengths and anatomical requirements while maintaining procedural efficiency through systematic progression through predefined deployment milestones.
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
Enables precise and complete deployment of medical devices by controlling the axial movement of the sheath over the cannula, ensuring accurate placement and deployment of medical devices at the treatment site, with the ability for staged deployment to accommodate varying device lengths.
Implementation Method 1
a motor and energy storage device moves the sheath axially over the cannula
Data Source
AI summary
Powered medical device deployment systems and methods are described herein. An embodiment of a powered medical device deployment system has a housing, a cannula, a sheath slidably disposed over the cannula, a flush port, a trigger, a drive mechanism, and a medical device. The drive mechanism is moveable between an on state and an off state. When the drive mechanism is in the on state the sheath is axially advanced over the cannula such that the medical device can be deployed at a point of treatment.