Minimally Invasive Cardiac Support System with Segmented Inlet
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Solution Overview
Problem
Conventional mechanical circulatory support systems are complex and difficult to use, requiring intricate components and processes, and there is a need for simpler systems that can provide effective temporary or long-term support during high-risk coronary interventions.
Innovation Solution
A minimally invasive miniaturized percutaneous mechanical circulatory support system is developed, featuring a low-profile axial rotary blood pump mounted on an 8 French catheter that can be inserted through the femoral artery and positioned across the aortic valve, utilizing a flexible slotted tube and polymeric sleeves for reduced shear stress and improved hemodynamic support, along with an inlet device made of super-elastic material and a connecting device for secure component attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional mechanical circulatory support systems are used, then reliable hemodynamic support is achieved, but device complexity and difficulty of use increase
Solution Approach 1:
The mechanical circulatory support system is divided into separable components including an inlet device with a catheter shaft and a pump assembly, allowing independent manufacturing, sterilization, and assembly of critical elements while maintaining overall system reliability
Solution Approach 2:
The inlet device is designed with nested structures where the impeller housing contains the impeller, motor, and bearing assembly, with the catheter shaft running through the center, enabling compact configuration that reduces overall device complexity while maintaining functional integrity
2Productivity
If conventional mechanical circulatory support systems are used, then adequate blood pumping is achieved, but ease of operation deteriorates
Solution Approach 1:
The inlet device incorporates a flexible catheter shaft with controlled stiffness that allows dynamic manipulation during insertion while maintaining structural integrity for effective blood pumping, enabling the device to adapt to different procedural requirements
Solution Approach 2:
The catheter shaft and inlet device components are designed with optimized dimensional parameters and material properties that facilitate easy insertion through standard access sites while maintaining sufficient pumping capacity, changing the scale parameters to improve ease of operation without sacrificing productivity
3Ease of operation
If miniaturized percutaneous systems are used, then ease of insertion is improved, but device complexity in components increases
Solution Approach 1:
The inlet device is designed as a separate, self-contained component that can be inserted independently through the catheter, extracting the complexity of the inlet structure from the main pump assembly and allowing simplified delivery while maintaining functional complexity where needed
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
The system provides efficient and safe hemodynamic support during high-risk procedures by actively unloading the left ventricle, minimizing shear stress, and allowing for easy insertion and detachment of components, reducing the risk of complications and improving procedural outcomes.
Implementation Method 1
an inlet device made of super-elastic material
Data Source
AI summary
Inlet device and connecting devices for a minimally invasive miniaturized percutaneous mechanical circulatory support system. The inlet device includes an inlet portion and a transfer portion with a support structure. The inlet device can be used for transmitting a body fluid of a patient, for example blood, to an impeller of a pump of the circulatory support system. The connecting device can include a receiving element and an insertion element. The receiving element of the connecting device can include a receiving structure that the insertion element of the connecting device can be pushed into. The insertion element can include at least one slide-on ramp, the slide-on ramp being connectable to the receiving structure in a form-fitting, non-positive, force-locking, and/or self-locking manner. The inlet device can include a receiving element or an insertion element of the connecting device.