Medical Measuring Device Sensor Integrated Into Line Wall
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Solution Overview
Problem
Existing medical measuring devices for fluid pressure measurement, particularly in blood, face challenges such as coagulation, hemolysis, leakage, and air incorporation due to complex connections and interfaces, which compromise sterility and measurement accuracy.
Innovation Solution
A medical measuring device with a sensor integrated into the wall of a fluid-conducting line, where the sensor is positioned in a radial cavity within the wall, allowing direct communication with the fluid and reducing the number of interfaces, thus minimizing leakage and contamination risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor is integrated into the line wall with direct fluid communication, then measurement precision and response time are improved, but the risk of coagulation and hemolysis increases due to edges and unfavorable flow properties
Solution Approach 1:
The patent applies local quality by creating a specific localized geometry at the sensor integration point. The radial cavity is designed with rounded transitions and no sharp edges, while the sensor surface is made flush with the inner wall. This localized modification maintains favorable flow properties at the critical measurement point while preserving the overall line function, thereby achieving precise measurement without causing coagulation or hemolysis.
2Ease of operation
If connectors or adapters are used to mount sensors on the line, then ease of installation is improved, but the risk of leaks increases at interfaces
Solution Approach 1:
The patent merges the sensor mounting function directly into the line wall structure by creating a radial cavity that is an integral part of the wall. This eliminates the need for separate connectors or adapters, thereby removing additional interfaces that could leak. The sensor is mounted directly into the cavity with the mounting surface formed as part of the wall structure, ensuring a reliable seal without additional connection points.
3Reliability
If indirect pressure measurement outside the line is used, then sterility is improved, but measurement delay and errors occur due to water column transmission
Solution Approach 1:
The patent uses the line wall itself as an intermediary structure that enables direct sensor communication with the fluid while maintaining sterility. The radial cavity acts as an intermediate space that allows the sensor to be positioned inside the wall structure with its measurement surface flush with the inner wall, enabling direct pressure measurement without requiring the fluid to travel through external water columns or priming systems.
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 precise, inline pressure measurement without delay, reduces the risk of leaks and contamination, and simplifies the device structure, ensuring sterility and accurate measurement of fluid pressure.
Implementation Method 1
a sensor device having a sensor configured to measure a property of the fluid conducted in the longitudinal cavity
Data Source
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AI summary
The present invention relates to a medical device measuring device (1) for measuring a property of a fluid, in particular for pressure measurement, comprising a line (20) extending along a central longitudinal axis (M) and configured to guide a fluid, in particular blood, within a longitudinal cavity (24) bounded by a wall (22); and a sensor device (30) with a sensor (32) configured to measure a property of the fluid guided in the longitudinal cavity (24); wherein the line (20) has a radial cavity (26) extending radially into the wall (22), in which the sensor device (30) is at least partially arranged and integrated into the wall (22) such that the sensor (32) communicates with the fluid. This provides a measuring device that is easy to use, particularly in conjunction with a comparatively accurate measurement, especially pressure measurement.Furthermore, the present invention relates to a method for manufacturing the measuring device or a measuring method using the measuring device.