Implantable ICP Catheter Monitoring With Position Compensation
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Solution Overview
Problem
Conventional methods for measuring intracranial pressure (ICP) are inaccurate due to factors like head temperature, barometric pressure, and patient position, susceptible to noise and measurement drift, and are overly invasive and uncomfortable for patients.
Innovation Solution
An implantable system with a pressure conduction catheter, sensors, and wireless communication for measuring ICP, intracranial temperature, and head position, using biocompatible materials and hermetically sealed components to improve accuracy and reduce invasiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional fluid column methods are used to measure ICP, then the measurement can be obtained, but the measurement accuracy deteriorates due to failure to account for head temperature, barometric pressure, and patient position
Solution Approach 1:
The patent applies parameter changes by compensating for multiple environmental and physiological factors (temperature, barometric pressure, patient position) in the pressure measurement calculations. The system adjusts the measured pressure values based on changes in these parameters to maintain accurate ICP readings despite varying operating conditions.
Solution Approach 2:
The system incorporates feedback mechanisms by continuously monitoring environmental and physiological parameters (temperature, pressure, position) and using this information to dynamically adjust the ICP measurements. This feedback loop ensures that measurement accuracy is maintained by compensating for drift and external factor variations in real-time.
2Measurement precision
If conventional fluid column methods are used, then ICP can be measured, but the system becomes susceptible to noise and measurement drift
Solution Approach 1:
The patent replaces the conventional mechanical fluid column system with electronic transducers and digital sensing systems. This substitution eliminates the mechanical limitations of fluid column methods, reducing susceptibility to noise and drift while enabling more precise and stable digital measurements of intracranial pressure.
Solution Approach 2:
The system uses parameter changes by implementing temperature compensation and drift correction algorithms that adjust measurements based on real-time environmental and physiological data, thereby maintaining measurement stability despite varying operating conditions.
3Measurement precision
If conventional catheter-based methods are used, then ICP measurement is achieved, but the procedure becomes overly invasive and restrictive
Solution Approach 1:
The patent replaces invasive mechanical catheter systems with non-invasive or minimally invasive optical sensors and wireless monitoring devices. This substitution eliminates the need for extensive surgical insertion while maintaining measurement capability, thereby improving patient comfort and ease of operation.
Solution Approach 2:
The system introduces intermediary sensing elements (such as optical sensors or wireless transducers) that can measure ICP without requiring direct invasive catheter placement. These intermediaries provide a less intrusive means of obtaining pressure data while maintaining measurement accuracy.
4Measurement precision
If conventional methods are used, then ICP measurement is possible, but the system becomes overly restrictive and uncomfortable for patients
Solution Approach 1:
The patent implements dynamic, adaptable monitoring systems that can adjust to various patient conditions and positions. The system dynamically compensates for changes in patient state, environment, and measurement conditions, providing versatile and adaptable ICP monitoring that maintains accuracy across different scenarios while improving patient comfort.
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 more accurate, less invasive, and stable monitoring of ICP and other physiological parameters, with improved drift stability and MRI safety, enabling versatile and calibrated measurements.
Implementation Method 1
The implant body can comprise a pressure-sensing diaphragm and sensors on the side of the implant body proximal to the pressure conducting catheter. The sensors can include optical sensors, strain gauges, capacitive sensors, Hall Effect sensors, and the like, and can measure stress and/or strain and/or deflection of the pressure-sensing diaphragm.
Implementation Method 2
The sensors can include optical sensors, strain gauges, capacitive sensors, Hall Effect sensors, and the like, and can measure stress and/or strain and/or deflection of the pressure-sensing diaphragm.
Implementation Method 3
The sensors can include optical sensors, strain gauges, capacitive sensors, Hall Effect sensors, and the like, and can measure stress and/or strain and/or deflection of the pressure-sensing diaphragm.
Implementation Method 4
The sensors can include optical sensors, strain gauges, capacitive sensors, Hall Effect sensors, and the like, and can measure stress and/or strain and/or deflection of the pressure-sensing diaphragm.
Implementation Method 5
The sensors can include optical sensors, strain gauges, capacitive sensors, Hall Effect sensors, and the like, and can measure stress and/or strain and/or deflection of the pressure-sensing diaphragm.
Implementation Method 6
Other sensors, such as temperature sensors, oxygen sensors, pH sensors, internal pressure sensors (e.g., measuring the pressure within the implant body) and the like, can also be used.
Data Source
AI summary
Systems and methods for monitoring physiological parameters such as intracranial pressure (“ICP”), intracranial temperature, and subject head position are provided. In some embodiments, an implantable apparatus for measuring ICP can be implanted into a subject skull. The apparatus can comprise an implant body having a pressure conduction catheter having a proximal end and a distal end, wherein the distal end is configured to extend into the brain through a burr hole in the skull and may include a plurality of ports.