Urine-Flow Oxygen Sensor Catheter for Fresh-Urine Measurement
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Solution Overview
Problem
Existing oxygen measurement devices face challenges in accurately and reliably measuring oxygen in fresh urine due to displacement and contact noise issues with the bladder wall, as well as unreliable detection of urine discharged from the kidney.
Innovation Solution
An oxygen measurement device with a urethral catheter and an oxygen sensor that allows urine to flow through a urinary passage, where the oxygen sensor is in contact with the urine, using a fluorescent body and optical fiber configuration to accurately measure oxygen levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the oxygen sensor main body is exposed from the open port of the urinary catheter to detect oxygen in the bladder, then the oxygen detection function is achieved, but the sensor is prone to displacement and contact with the bladder wall causing measurement noise
Solution Approach 1:
The patent introduces urine as an intermediary medium between the oxygen sensor and the bladder wall. The sensor detects oxygen dissolved in urine rather than directly contacting the bladder wall, eliminating displacement and contact noise issues while maintaining detection reliability
Solution Approach 2:
The patent separates the sensing function from the structural support function by using a thin membrane structure that allows urine to contact the sensor while providing positional stability, reducing both displacement and contact noise
2Reliability
If the oxygen sensor is positioned in the bladder to detect oxygen, then oxygen detection is possible, but it becomes difficult to distinguish between oxygen from urine and oxygen from the bladder wall
Solution Approach 1:
The patent uses urine as an intermediary that carries kidney-originated oxygen information to the sensor. By detecting oxygen in urine rather than directly in the bladder, the system preserves the specific oxygen information from kidney function while filtering out bladder wall interference
3Measurement precision
If the oxygen sensor main body is in contact with urine in the bladder, then oxygen measurement is possible, but the sensor may be positioned where urine remains without discharge reducing measurement reliability
Solution Approach 1:
The patent employs urine flow through the catheter as an intermediary mechanism that ensures the sensor continuously contacts fresh, discharged urine from the kidney, eliminating the problem of sensing stagnant urine that does not reflect current kidney function
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 device enables accurate and reliable measurement of oxygen in fresh urine by ensuring consistent contact with the urine flow and minimizing contamination, improving measurement accuracy and ease of assembly.
Implementation Method 1
the oxygen sensor main body includes a fluorescent body, and a base portion in which the fluorescent body is disposed, and an optical fiber formed separately from the oxygen sensor main body
Data Source
AI summary
An oxygen measurement device includes a catheter including a flexible hollow shaft, the flexible shaft having an open port configured to allow urine from a bladder to flow into the open port, and a urinary passage in communication with the open port configured to discharge the urine; and an oxygen sensor including an oxygen sensor main body capable of detecting oxygen in the urine, the oxygen sensor being disposed in the catheter and configured such that the oxygen sensor main body is in contact with the urine flowing in the urinary passage.