Lactate-Responsive Sensor for Continuous In Vivo Monitoring
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Solution Overview
Problem
Current methods for monitoring lactate levels during physical activity are inaccurate and inconvenient, especially for determining lactate threshold and recovery periods, which are crucial for optimizing athletic performance and training protocols.
Innovation Solution
The development of lactate-responsive sensors that provide continuous, accurate measurements of lactate concentrations, allowing for real-time monitoring and analysis of lactate clearance rates, enabling informed adjustments to training protocols and recovery strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external sensors or equipment are used to monitor lactate levels, then measurement capability is provided, but measurement precision is poor and results are inaccurate
Solution Approach 1:
The patent replaces invasive mechanical blood draws with an optical detection system. The sensor uses light absorption at specific wavelengths (320-360 nm) to detect lactate concentrations in interstitial fluid, eliminating the need for needle punctures and manual blood sampling while providing continuous, accurate measurements during exercise.
Solution Approach 2:
The patent introduces interstitial fluid as an intermediary medium between the external sensor and blood lactate levels. The sensor measures lactate in the interstitial fluid, which serves as a reliable proxy for blood lactate concentration, enabling non-invasive monitoring with accuracy sufficient for determining lactate threshold and guiding training protocols.
2Measurement precision
If invasive blood draws are performed to obtain reliable lactate levels, then measurement precision improves, but ease of operation deteriorates due to pain and inconvenience
Solution Approach 1:
The patent replaces invasive mechanical blood draws with an optical detection system. The sensor uses light absorption at specific wavelengths (320-360 nm) to detect lactate concentrations in interstitial fluid, eliminating the need for needle punctures and manual blood sampling while providing continuous, accurate measurements during exercise.
Solution Approach 2:
The sensor system performs self-service by continuously sampling interstitial fluid through the sensor interface without requiring user intervention for blood draws. The system automatically monitors lactate levels, calculates clearance rates, and provides real-time feedback, eliminating the need for repeated invasive procedures by trained personnel.
3Measurement precision
If blood draws are performed during workout routine, then lactate threshold can be determined, but productivity decreases due to workout stoppage
Solution Approach 1:
The patent enables continuous monitoring of lactate levels throughout the workout without interruption. The sensor continuously measures lactate concentration in interstitial fluid, allowing the workout to proceed uninterrupted while simultaneously determining lactate threshold and monitoring lactate clearance rates in real-time.
Solution Approach 2:
The patent replaces discrete, interruptive blood draws with continuous optical monitoring. This substitution allows lactate threshold determination and clearance rate calculation to occur during uninterrupted exercise, maintaining workout intensity and flow while gathering the necessary physiological data.
4Measurement precision
If data collection frequency is increased to accurately determine lactate threshold, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent uses optical absorption spectroscopy, a well-established and relatively simple analytical technique. The sensor measures light absorption at specific wavelengths (320-360 nm) corresponding to lactate's absorption spectrum, converting optical signals directly into concentration data through calibrated algorithms without requiring complex mechanical or chemical systems.
Solution Approach 2:
The patent measures lactate in interstitial fluid rather than directly in blood, using this fluid as an intermediary that provides sufficient measurement accuracy for training purposes. This approach simplifies the sampling system compared to direct blood access while maintaining the ability to determine lactate threshold and monitor clearance rates with adequate precision.
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 monitoring of lactate levels and clearance rates, facilitating personalized and efficient training programs by providing immediate feedback for optimizing physical fitness and performance.
Implementation Method 1
a lactate-responsive sensor adapted for detecting lactate in vivo
Data Source
AI summary
In vivo lactate concentrations may be monitored to determine a rate of lactate clearance as one metric of an individual's physical fitness. The rate of lactate clearance may guide further training. Lactate may be monitored using a sensing system comprising a lactate-responsive sensor, and a signal from the sensor may be communicated to a processor for calculating the lactate concentrations and a rate of lactate clearance. Some methods for determining physical fitness may comprise: measuring a plurality of lactate concentrations in a biological fluid with a sensing system comprising a lactate-responsive sensor over a period of time while the lactate concentrations are decreasing following a peak lactate level; and specifying that a second exercise event be conducted after a recovery period in which the lactate level has fallen to a predetermined concentration.