Peripheral Venous Pressure Measurement via Fluid Coupling
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Solution Overview
Problem
Current methods for measuring peripheral venous pressure (PVP) and monitoring intravascular placement of peripheral IV catheters are invasive, costly, and lack sensitivity, leading to potential misplacement and complications such as compartment syndrome and tissue necrosis.
Innovation Solution
A non-invasive apparatus using tubing with a fluid controlling device and pressure sensors to measure PVP, including a method to determine proper IV catheter placement by analyzing pressure change rates and waveforms, allowing for accurate monitoring without direct visualization of the IV site.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If invasive hemodynamic monitoring is used to measure PVP, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent uses a fluid coupling device as an intermediary between the fluid source and the vein, which allows the pressure sensor to measure venous pressure without requiring direct invasive access to the central venous system. The fluid coupling device transmits pressure information from the peripheral vein to the sensor, enabling accurate PVP measurement through a less complex peripheral insertion approach.
2Device complexity
If traditional monitoring methods are used, then device complexity is reduced, but measurement precision and sensitivity deteriorate
Solution Approach 1:
The system continuously monitors PVP and provides feedback about intravascular volume status. The processor analyzes the measured pressure values and can detect changes in volume status, allowing for dynamic adjustment of monitoring and treatment. This feedback mechanism enables accurate detection of volume changes without requiring complex invasive monitoring systems.
3Ease of operation
If IV catheter placement is not monitored, then ease of operation is improved, but reliability of therapy delivery deteriorates
Solution Approach 1:
The system provides continuous feedback about catheter placement status by monitoring pressure values. When the catheter is properly positioned in the vein, characteristic pressure waveforms and values are detected. If the catheter becomes dislodged or malpositioned, the pressure readings change, alerting the operator to the problem. This feedback enables reliable therapy delivery while maintaining simple operation.
4Object-affected harmful factors
If non-invasive PVP measurement is attempted, then device complexity and infection risk are reduced, but measurement precision deteriorates
Solution Approach 1:
The fluid coupling device acts as an intermediary that allows the pressure sensor to be isolated from direct contact with the venous system while still accurately measuring venous pressure. The fluid column transmits pressure information from the vein to the sensor, enabling non-invasive or minimally invasive measurement with maintained precision. This approach reduces infection risk while preserving measurement accuracy.
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 solution enables accurate, non-invasive measurement of PVP and monitoring of IV catheter placement, reducing vascular complications and infection risk, while being cost-effective and suitable for various medical settings, including trauma situations.
Implementation Method 1
at least one pressure sensor in fluid communication with the tubing through the port device, configured to measure fluid pressures therein
Data Source
AI summary
In one aspect, an apparatus for measuring peripheral venous pressure includes a tubing having two ends with one end connectable to a fluid source and the other end connectable to a vein, a fluid controlling device configured to have an on position and an off position, and at least one pressure sensor configured to measure fluid pressures therein. When the fluid controlling device is in the on position, fluid flow in the tubing is allowed to pass through the fluid controlling device, such that the at least one pressure sensor measures both a fluid pressure from the fluid source and a distal venous pressure from the vein. When the fluid controlling device is in the off position, no fluid flow in the tubing is allowed to pass through the fluid controlling device, such that the at least one pressure sensor measures the distal venous pressure from the vein only.