Integrated Pressure-Temperature Sensor for Small-Diameter Catheters
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Solution Overview
Problem
Existing methods for measuring deep body temperature and bladder internal pressure using separate catheters are burdensome for patients and increase the catheter's external diameter, making practical application difficult.
Innovation Solution
A sensor device integrating a pressure sensor and a temperature sensor within a miniaturized distal-end member, with lead wires connected to both sensors, allowing for a compact design that can be embedded in a catheter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If both a temperature sensor and a pressure sensor are attached to the distal end portion of a urethra catheter to measure deep body temperature and bladder internal pressure at the same time, then measurement capability is improved, but the external diameter of the catheter is increased
Solution Approach 1:
The patent combines multiple sensor functions (temperature sensing and pressure sensing) into a single integrated sensor unit that is accommodated within the distal-end-side member. This merging of functions allows both temperature and pressure measurements to be performed simultaneously without requiring separate catheters, thereby improving measurement capability while avoiding an increase in external diameter.
Solution Approach 2:
The sensor device employs a nested structure where the pressure sensor and temperature sensor are both accommodated within the inner space of the distal-end-side member. The sensors are arranged in a compact, space-efficient configuration that allows them to be nested within the limited volume of the catheter tip, maintaining a small external diameter while housing multiple sensing functions.
2Measurement precision
If separate catheters are prepared for deep body temperature measurement and bladder internal pressure measurement, then measurement accuracy is improved, but the burden on the patient is increased
Solution Approach 1:
The patent merges temperature measurement and pressure measurement functions into a single catheter device, eliminating the need for multiple separate catheters. This consolidation maintains measurement accuracy for both parameters while significantly reducing the burden on the patient by requiring only one catheter insertion procedure.
Solution Approach 2:
The catheter device is designed with multi-functionality, serving both as a temperature measurement device and a pressure measurement device simultaneously. This universal design allows a single catheter to perform multiple diagnostic functions, improving ease of operation for the patient while maintaining the precision of specialized sensors.
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 integrated sensor device reduces the burden on patients by maintaining a small catheter size while accurately measuring both deep body temperature and bladder internal pressure.
Implementation Method 1
a pressure detection element 41 which is formed on one surface side of a substrate 42 of the pressure sensor 4
Implementation Method 2
a temperature detection element 51 which is formed on one surface side of a substrate 52 of the temperature sensor 5
Data Source
AI summary
Provided are a sensor device which can be made small-sized, a catheter, and a system provided with the sensor device. A sensor device (1) is provided with a pipe-shaped distal-end-side member (23), a pressure sensor (4) and a temperature sensor (5) which are integrated and accommodated in an inner space of the distal-end-side member (23), and lead wires (6) connected to the pressure sensor (4) and the temperature sensor (5) and led out to the rear-end side. In the pressure sensor (4) and the temperature sensor (5), sensor elements (41), (51) are formed on one surface side of respective substrates (42), (52) thereof, and are disposed and integrated so that the other-surface sides of the substrates (42), (52) face each other.