Implantable Fluid Delivery Catheter Patency Monitoring
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Solution Overview
Problem
Implantable medical fluid delivery devices face challenges in monitoring the condition and performance of catheters, particularly in determining patency and troubleshooting issues such as blockages or malfunctions, which can affect the proper delivery of therapeutic agents to patients.
Innovation Solution
The implementation of an implantable fluid delivery system equipped with a catheter, a fluid delivery pump, pressure sensors, and a processor that measures pressure waveforms to determine catheter characteristics by comparing current and baseline pressure waveforms, allowing for real-time monitoring and troubleshooting of catheter patency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure sensors and waveform analysis are implemented to monitor catheter patency, then the reliability of therapy delivery is improved, but the device complexity increases
Solution Approach 1:
The system performs self-diagnosis by automatically analyzing pressure waveforms to detect catheter occlusions. The processor continuously monitors pressure changes during pump operation and autonomously determines patency status without requiring external intervention or complex additional sensing systems.
Solution Approach 2:
The system implements feedback monitoring by measuring pressure waveforms during fluid delivery and using this information to detect catheter conditions. The pressure sensor provides continuous feedback about catheter patency, allowing the system to adjust or alert based on detected anomalies in the pressure decay profile.
2Measurement precision
If baseline pressure waveform comparison is used to detect catheter issues, then the measurement precision of catheter patency is improved, but the loss of time for establishing baseline increases
Solution Approach 1:
The system establishes a baseline pressure waveform during initial device operation or calibration phase before actual therapy delivery begins. This preliminary baseline is stored and used for subsequent comparisons, allowing rapid detection of catheter issues during therapy without requiring real-time baseline establishment.
Solution Approach 2:
The system creates a reference copy of the normal pressure waveform profile during baseline operation. This copied baseline waveform is stored in memory and used as a template for comparing against subsequent pressure measurements to detect deviations indicating catheter problems.
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
This solution enables effective monitoring and troubleshooting of catheter performance, ensuring reliable and safe delivery of therapeutic agents by detecting issues like blockages or malfunctions, thereby maintaining the integrity of the treatment regimen.
Implementation Method 1
at least one pressure sensor arranged to measure a pressure associated with the catheter during delivery of the fluid to the patient
Data Source
AI summary
A programmer device includes an interface that communicates with an implantable fluid delivery device and a user interface that allows a user to troubleshoot a catheter connected to the fluid delivery device by measuring a pressure associated with the catheter. A processor may compare the measured pressure waveform to a previously-acquired waveform or the user interface may display the measured pressure waveform for the user to compare the displayed pressure waveform to a previously-acquired baseline waveform. The comparison between the two waveforms may be based on the pressure decay time. A historical log of measured pressure decays associated with the catheter may be maintained by the programmer device or the implantable fluid delivery device and displayed for the user to determine whether the performance of the catheter is deteriorating.