Balloon Catheter Pressure Sensing via Tube Expansion
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Solution Overview
Problem
Existing methods for treating postpartum hemorrhage using uterine balloon tamponade struggle with inaccurate quantification of saline injection pressure and volume, relying on subjective medical staff judgment, which can lead to excessive or insufficient treatment and potential infection risks.
Innovation Solution
A non-contact pressure measurement system for balloon catheters that includes a chamber, pump, displacement sensor, and weight sensor to accurately measure saline injection amount and pressure without direct contact, using a displacement sensor to gauge tube expansion via laser and a database to correlate expansion with pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual saline injection is used in uterine balloon tamponade, then the procedure is simple and easy to perform, but the injection pressure and amount cannot be quantitatively measured, leading to inaccurate treatment
Solution Approach 1:
The patent replaces direct mechanical contact measurement with optical measurement. A laser displacement sensor measures the expansion of the tube part externally using laser light, eliminating the need for mechanical pressure sensors inside the saline pathway. This substitution enables precise pressure and volume measurement while maintaining system simplicity and preventing infection.
Solution Approach 2:
The patent introduces the tube part expansion as an intermediary indicator. Instead of measuring pressure and volume directly, the system measures the expansion of the tube part, which correlates to the saline injection pressure and amount. This intermediary measurement approach enables indirect but accurate quantification without complex direct sensing.
2Measurement precision
If a separate measurement device is added to the tube to measure injection amount and pressure, then measurement accuracy improves, but the risk of infection through the saline solution increases
Solution Approach 1:
The patent extracts the measurement function from the internal saline pathway and places it externally. The displacement sensor measures tube expansion from the outside, and the weight sensor measures saline weight externally. This extraction eliminates the need for sensors inside the sterile field, preventing infection risk while maintaining measurement precision.
Solution Approach 2:
The patent replaces potential contact-based measurement methods with non-contact optical measurement using a laser displacement sensor. This substitution eliminates the need for mechanical sensors that would require contact with the saline solution, thereby preventing infection while enabling accurate measurement.
3Productivity
If saline injection is performed based on medical staff experience, then the procedure is quick and requires minimal equipment, but the treatment may be excessive or insufficient
Solution Approach 1:
The patent implements real-time feedback through the displacement sensor and weight sensor that continuously monitor tube expansion and saline weight. This feedback provides objective data on injection progress, allowing medical staff to adjust injection rate and volume dynamically, ensuring precise treatment while maintaining procedural efficiency.
Solution Approach 2:
The patent replaces subjective human judgment with objective optical and gravitational measurement systems. The laser displacement sensor and weight sensor provide quantifiable data on injection parameters, substituting experience-based estimation with precise measurement while maintaining quick procedure execution.
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
Enables precise saline injection control, reducing infection risks by eliminating direct contact and subjective judgment, ensuring accurate pressure and volume measurements for effective uterine balloon tamponade treatment.
Implementation Method 1
The sensor unit may be a displacement sensor configured to measure the amount of the expansion of the tube part using a laser.
Implementation Method 2
the chamber part may include a weight sensor disposed under the chamber part, and configured to measure a weight of the saline solution stored in the chamber part.
Data Source
AI summary
In a non-contact pressure measurement system of a balloon catheter and a non-contact pressure measurement method of the balloon catheter using the same, the system includes a chamber part, a balloon, a tube part, a pump part and a displacement sensor. The chamber part stores a saline solution. The balloon is disposed inside of a body and is configured to be expanded with supply of the saline solution. The tube part is configured to connect the chamber part with the balloon. The pump part is configured to control the supply of the saline solution via the tube part. The displacement sensor is configured to measure an amount of the expansion of the tube part expanded with the supply of the saline solution, in a predetermined section of the tube part.