Catheter Pressure Sensor Trajectory Deviation
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Solution Overview
Problem
Catheters used for administering substances into brain tissue often deviate from planned trajectories due to anatomical structures and inhomogeneous tissue properties, making reliable and predictable distribution challenging.
Innovation Solution
A catheter equipped with a pressure sensor arrangement at its distal end to detect pressure distribution and deformation, allowing for real-time feedback on deviations from the planned trajectory, enabling adjustments in substance flow and catheter positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a catheter is made rigid or a stylet is inserted for stable placement, then the catheter can be placed, but it may deviate from the planned trajectory due to anatomical structures and tissue inhomogeneity
Solution Approach 1:
The patent implements a feedback mechanism by equipping the catheter with pressure sensors that continuously monitor the pressure distribution along its length. This pressure information serves as feedback about the catheter's actual position and deformation state, allowing real-time detection of trajectory deviations. The system processes this pressure data to determine the catheter's spatial configuration and compares it against the planned trajectory, enabling corrective actions to be taken.
Solution Approach 2:
The patent replaces direct mechanical observation or visual tracking of catheter position with an indirect sensing approach. Instead of mechanically tracking the catheter's position through external imaging or mechanical markers, the system uses pressure sensors to detect internal pressure distributions within the catheter wall, which indirectly reveal the catheter's spatial configuration and deformation state.
2Measurement precision
If pressure sensors are added to detect catheter deformation, then trajectory deviations can be detected, but the device complexity increases
Solution Approach 1:
The pressure sensor system serves multiple functions simultaneously: it monitors catheter deformation for trajectory detection, measures pressure distribution for positioning information, and provides data for both real-time feedback and post-procedure analysis. This multi-functionality reduces the need for separate specialized sensors for each measurement type, thereby limiting the increase in device complexity.
Solution Approach 2:
The patent changes the measurement parameter from direct positional measurement to pressure distribution measurement. By measuring pressure variations along the catheter length and inferring position and deformation from these pressure patterns, the system achieves accurate trajectory monitoring without requiring complex mechanical or optical measurement systems.
3Reliability
If the catheter follows the planned trajectory precisely, then reliable substance distribution is achieved, but the catheter cannot adapt to anatomical variations
Solution Approach 1:
The patent introduces dynamics into the catheter system by enabling real-time monitoring and adjustment capabilities. The pressure sensor system continuously tracks the catheter's actual position, and based on this dynamic information, the system can provide real-time feedback to operators for adjusting the catheter position or adapting the administration plan, transforming a static placement procedure into a dynamic, adaptable process.
Solution Approach 2:
The system performs preliminary assessment of the actual catheter position and deformation state before substance administration begins. By using pressure sensors to detect the catheter's true configuration in advance, the system allows for preliminary adjustments to be made to ensure accurate positioning, thereby maintaining reliable substance distribution even when anatomical variations are encountered.
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
Ensures reliable and predictable substance distribution by providing immediate directional information on catheter bending, allowing for corrective actions and targeted adjustments during administration.
Implementation Method 1
a pressure sensor arrangement (4A, 4B, 4C, 4D) is provided in the catheter body (3), by means of which a pressure distribution over a region of the catheter is recorded
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a catheter (1) for administering a substance into body tissue, in particular into brain structures, with an elongated catheter body (3) surrounding a lumen (2), wherein a pressure sensor arrangement (4-8) is provided on or in the catheter body (3) by means of which a pressure distribution over a region of the catheter (1) is detected.