Calcium Isotope Ratio Diagnosis Without Radiation
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Solution Overview
Problem
Current diagnostic methods for diseases associated with reduced bone density, such as osteoporosis, require radiation exposure and individualized baseline measurements, making them unsuitable for preventive medicine and screening.
Innovation Solution
A method involving the determination of isotope ratios or quantitative ratios of alkaline earth metal components in urine, blood, or stool samples, compared to fixed threshold values independent of individual patient factors, allowing for a simplified and cost-effective diagnosis without the need for baseline measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If X-ray-based DXA or DEXA is used to diagnose osteoporosis, then diagnostic accuracy is improved, but radiation exposure increases and comparability of values deteriorates
Solution Approach 1:
The patent replaces the X-ray-based mechanical/diagnostic system with a biochemical analysis system that measures calcium isotope ratios in urine samples. This substitution eliminates radiation exposure while providing diagnostic information about bone mineral balance through isotopic composition analysis rather than radiation-based imaging.
2Measurement precision
If individual baseline measurements are required for diagnosis, then measurement precision is improved, but ease of operation deteriorates and device complexity increases
Solution Approach 1:
The patent enables the diagnostic system to self-calibrate by using the patient's own urine sample as the reference standard. The measurement system automatically adjusts to each patient's baseline calcium isotope composition, eliminating the need for separate baseline measurements while maintaining diagnostic precision. This self-service approach simplifies operation for both patients and clinicians.
3Reliability
If multiple measurements and baseline determination are required, then diagnostic reliability is improved, but productivity deteriorates and loss of time increases
Solution Approach 1:
The patent performs preliminary action by using the patient's own urine sample to automatically establish the baseline calcium isotope ratio before diagnostic evaluation. This preliminary self-calibration step is integrated into the single measurement process, eliminating the need for separate baseline determination and enabling immediate diagnostic interpretation without requiring multiple visits or extended measurement periods.
4Measurement precision
If individual normalization is performed, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent introduces the patient's own urine calcium isotope composition as an intermediary reference standard. This self-referenced intermediary automatically normalizes the diagnostic measurement to each patient's individual baseline, eliminating the need for complex external normalization protocols or databases while maintaining precision and comparability of results.
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 efficient and cost-effective diagnosis of reduced bone density diseases using a single sample, with high sensitivity and specificity, particularly useful in preventive care for larger populations, including older women, without the need for nutritional control or prior measurements.
Implementation Method 1
determining isotope ratios or quantitative ratios of alkaline earth metal components in a sample of urine or blood or stool
Data Source
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AI summary
The invention relates to a method for diagnosing a disease associated with reduced bone density and/or calcium loss, comprising the following steps: a) determining isotopic ratios or quantitative ratios of alkaline earth metal proportions in a sample of urine, blood, or stool, b) thereby determining at least one sample value, and c) comparing the at least one sample value with a threshold value, wherein the threshold value is chosen independently of one or more factors attributable to the individual patient, and a test kit for use in carrying out the method.