Proximal Pressure Sensor Housing for Percutaneous Heart Pumps
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Solution Overview
Problem
Percutaneous circulatory support devices with pressure sensors face issues such as damage during deployment and inaccurate pressure readings due to dynamic effects, necessitating improved designs.
Innovation Solution
The device incorporates a pressure sensor positioned proximally relative to the housing, protected by a sensor housing with apertures and secured to the catheter via an outer jacket, reducing damage and enhancing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure sensors are included in percutaneous circulatory support devices, then pressure measurement capability is improved, but device complexity increases
Solution Approach 1:
The pressure sensor is nested within a sensor housing that is integrated into the catheter structure. The sensor housing contains the pressure sensor and positions it within the catheter lumen, creating a nested configuration that adds measurement capability while containing the complexity within a dedicated submodule rather than dispersing it throughout the entire device
Solution Approach 2:
The sensor housing serves multiple functions: it protects the pressure sensor, positions it within the catheter lumen, provides apertures for pressure equalization, and integrates with the catheter structure. This multi-functionality reduces the need for separate components, thereby managing device complexity while maintaining measurement precision
2Measurement precision
If pressure sensors are positioned distally within the device, then pressure sensing is improved, but sensor damage risk increases
Solution Approach 1:
The sensor housing acts as a protective cushion for the pressure sensor before deployment. The housing surrounds the sensor and provides structural protection during the deployment process, reducing the risk of damage from mechanical stresses, crushing forces, or contact with deployment tools while maintaining the sensor's distal positioning for accurate pressure sensing
3Measurement precision
If pressure sensors are positioned proximally relative to the housing, then dynamic pressure effects are reduced, but measurement location flexibility is constrained
Solution Approach 1:
The catheter with the integrated sensor housing can be dynamically positioned within the device at different locations along the catheter length. The sensor housing is designed to be coupled to the catheter at various positions, allowing the pressure sensor to be placed proximally relative to the housing while maintaining the ability to adapt to different measurement location requirements based on the specific application
Data Source
AI summary
A percutaneous circulatory support device includes a housing and an impeller disposed within the housing. The impeller is configured to rotate relative to the housing to cause blood to flow through the housing. A motor is operably coupled to the impeller, and the motor is configured to rotate the impeller relative to the housing. A catheter is coupled to the motor, and a pressure sensor is coupled to the catheter and disposed proximally relative to the housing.