continuous lactate sensing
DESCRIPTION
Toby Li, Wern Ong , Joe Sun, Stephanie Wu, Christine Zhang. Continuous Lactate Sensing. Problem Statement. Athletes need a means to non-invasively continuously monitor lactate anaerobic threshold for use in training - PowerPoint PPT PresentationTRANSCRIPT
Continuous Lactate Sensing
Toby Li, Wern Ong, Joe Sun, Stephanie Wu, Christine Zhang
Problem Statement
Athletes need a means to non-invasively continuously monitor lactate anaerobic threshold for use in training
Current systems are expensive and cumbersome and require a laboratory environment
Performance Criteria
Non-invasive Low cost Easy to use/simplistic Continuous monitoring Real-time feedback
Primary Objective
Continuous monitoring Performance Evaluation Training Exercises
Potential Users Athletes & Professional Sports▪ 400,000 college athletes
Sport Enthusiasts ▪ 467,000 marathon runners in U.S. 2009
Goals Produce a novel
method for monitoring lactate anaerobic threshold in exercise situations that is… Hygienic Easy to use Noninvasive Accurate Inexpensive
Performance Metrics Lactate anaerobic
threshold sensing 1 mmol resolution
80% users surveyed agree that device is Comfortable
Less than 2 minute lag time
Less than $30 per unit Reusable up to 10
times
Solution DescriptionSensor detects lactate levels in
salivaLactate level transduced into
electrical signalElectrical signal triggers
notification mechanismAthlete modifies training
accordingly
Design 1
•Saliva and blood lactate levels show high correlation
•Embed microfluidic lactate sensor in mouth guard
sensor & processor
Design Problem
•Wires running from mouth guard would be cumbersome
•Cost of microprocessor for wireless data collection is prohibitive• $150 – 800
5
Design 2
Common mouth guard dimensions (7.5 cm × 7.5 cm × 2.5 cm )Example saliva lactate sensor design (5.5mm×6.4mm×0.7mm)
Mouth Guard Architecture
Part of the mouth guard removed from where the chip and gel will be installed
Chamber for electro-sensitive gel and films connected to working electrode (red) and reference electrode (green)
Thin film of mouth guard material seals the chip and gel
Design Problems
Modifying existing saliva lactate chip to better suit this application
Connecting Working Electrode and reference electrode to the gel chamber
Selection of electro-sensitive gel Inherent variance of human lactate
baseline and threshold
Future
•Decide on design
•Synthesize
•Validate