Intravascular Catheter Mounting Base Isolates Pressure Sensor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing intravascular pressure measuring catheters face accuracy issues due to deformation when navigating complex blood vessels, which can adversely affect pressure sensor measurements.
Innovation Solution
An intravascular pressure measuring catheter with a mounting base that isolates the pressure sensor from the catheter body, using a stepped portion and conducting wire for signal transmission, and a high-strength mounting base material to minimize deformation impact on measurement precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the pressure sensing catheter is used to navigate complex blood vessels, then the catheter can reach various measurement positions, but the catheter is squeezed and deformed which adversely affects measurement accuracy
Solution Approach 1:
The catheter is divided into distinct functional segments: a flexible distal portion for navigation and a rigid mounting base for stable sensor positioning. This segmentation allows the distal portion to adapt to complex vessel geometry while the mounting base maintains measurement stability.
Solution Approach 2:
The mounting base acts as an intermediary structure between the flexible catheter body and the pressure sensor. It isolates the sensor from deformation forces transmitted through the catheter, providing a stable reference frame for accurate measurements while allowing the catheter to navigate complex vessels.
2Device complexity
If the pressure sensor is integrated directly into the catheter body, then the structure is simplified, but the sensor is affected by catheter deformation which reduces measurement precision
Solution Approach 1:
The catheter structure is segmented into the catheter body and a separate mounting base that houses the sensor. This segmentation adds a minimal structural element that physically isolates the sensor from deformation, achieving measurement precision without significantly increasing overall device complexity.
Solution Approach 2:
The mounting base serves as an intermediary structure that decouples the sensor from the flexible catheter body. This intermediate element provides mechanical isolation while maintaining structural integration, solving the contradiction between simplicity and precision.
3Measurement precision
If a rigid mounting base is used to support the pressure sensor, then measurement stability is improved, but the catheter flexibility and ability to navigate vessels may be reduced
Solution Approach 1:
The catheter is segmented into a flexible distal portion for navigation and a localized rigid mounting base for sensor support. This segmentation confines the rigid structure to a small region, minimizing its impact on overall catheter flexibility while providing necessary measurement stability.
Solution Approach 2:
The mounting base is designed with locally optimized rigidity only at the sensor mounting region, while the rest of the catheter maintains flexibility. This local quality approach provides measurement stability where needed without compromising overall catheter adaptability to complex vessel geometries.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Provided is an intravascular pressure measuring catheter (1) having a mounting base (30), comprising: a distal sleeve (10) having a guidewire lumen (11) for slidably receiving a separate medical guidewire (50); a proximal portion (20) coupled to the distal sleeve (10); and a pressure sensor (40) which is provided on the mounting base (30) and comprises a sensing portion (41) and a lead portion (42), wherein the sensing portion (41) has a sensing area (410) for sensing pressure, and the lead portion (42) transmits the blood pressure signal generated by the sensing area (410), and wherein the sensing portion (41) of the pressure sensor (40) and the mounting base (30) have a gap therebetween. By providing the pressure sensor (40) on the mounting base (30), and enabling the sensing portion (41) of the pressure sensor (40) and the mounting base (30) to have a gap therebetween so that they do not come into contact, the present invention can restrain the influence of the bending deformation of the intravascular pressure measuring catheter (1) on a pressure measurement result, thereby improving the measurement precision of the intravascular pressure measuring catheter (1).