Breastfeeding Milk Volume Monitoring via Capacitance Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for monitoring milk consumption during breastfeeding lack accuracy and reliability, particularly in distinguishing between milk consumption and other factors contributing to stress in breastfed babies, such as weight measurement and Doppler-shift techniques.
Innovation Solution
A method and device utilizing capacitance measurement to estimate milk consumption by correlating variations in electric capacitance of the breast with the amount of milk consumed, involving the use of electrodes to measure internal breast capacitance while minimizing skin contribution, and employing calibration and history data for improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If weight subtraction technique is used to monitor milk consumption, then the method is simple to implement, but the accuracy and reliability are insufficient to distinguish milk consumption from other stress factors
Solution Approach 1:
The patent replaces mechanical weight measurement with electrical capacitance measurement. The system uses electrodes to detect changes in breast tissue capacitance during feeding, which correlates with milk volume. This substitution provides more precise measurement while maintaining ease of use through non-invasive electrode placement on the breast surface.
2Ease of operation
If Doppler-shift technique is used to measure milk flow, then the measurement can be performed non-invasively, but the accuracy and reliability remain insufficient for distinguishing milk consumption from other factors
Solution Approach 1:
The patent changes the measurement parameter from Doppler frequency shift to electrical capacitance. By measuring capacitance changes in the breast tissue using electrodes, the system directly detects milk volume variations. This parameter change enables more accurate measurement while maintaining non-invasive operation through simple electrode placement on the breast surface.
3Measurement precision
If capacitance measurement is used to monitor breastfeeding, then the accuracy and reliability of milk consumption measurement is improved, but the device complexity increases due to electrode configuration and signal processing requirements
Solution Approach 1:
The patent makes the capacitance measurement system multi-functional by using the same electrode configuration for both signal transmission and capacitance measurement. The electrodes serve dual purposes: delivering stimulation signals and detecting capacitance changes, thereby reducing overall system complexity despite the advanced measurement capability.
Solution Approach 2:
The patent introduces an intermediary signal processing system that converts complex electrical signals into simplified capacitance values. The processor acts as an intermediary between the electrodes and the measurement output, filtering and interpreting the signals to provide accurate milk consumption data while hiding the complexity from the user.
4Measurement precision
If capacitance measurement focuses on internal breast capacitance, then the measurement precision is improved, but the difficulty of detecting and measuring increases due to the need to minimize skin contribution
Solution Approach 1:
The patent extracts the internal breast capacitance signal from the total measured signal by mathematically separating the skin capacitance component. The system measures both the total capacitance and the skin capacitance contribution, then subtracts the skin component to isolate the internal breast tissue capacitance, thereby achieving precise measurement of the target parameter.
Solution Approach 2:
The patent performs preliminary measurement of skin capacitance before the actual breastfeeding monitoring. By characterizing the skin's electrical properties in advance and storing this as reference data, the system can later subtract the skin contribution from total measurements to isolate the internal breast capacitance signal, simplifying the measurement process.
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 method provides a reliable and accurate estimation of milk consumption with a 7% error margin, effectively differentiating between milk consumption and other factors, thereby aiding in stress assessment in breastfed babies.
Implementation Method 1
determining variations in electric capacitance of the breast during breastfeeding, and correlating the electric capacitance variations to an amount of milk consumed by the infant
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A method of monitoring amount of milk consumed by an infant being breastfed by a breast is disclosed. The method comprises: determining variations in electric capacitance of the breast during breastfeeding, and correlating the electric capacitance variations to an amount of milk consumed by the infant.