toby li wern ong joe sun stephanie wu christine zhang
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Continuous Lactate Sensing

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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

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Presentation Transcript
problem statement
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
Performance Criteria
  • Non-invasive
  • Low cost
  • Easy to use/simplistic
  • Continuous monitoring
  • Real-time feedback
primary objective
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
Goals
  • Produce a novel method for monitoring lactate anaerobic threshold in exercise situations that is…
    • Hygienic
    • Easy to use
    • Noninvasive
    • Accurate
    • Inexpensive
performance metrics
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 description
Solution Description
  • Sensor detects lactate levels in saliva
  • Lactate level transduced into electrical signal
  • Electrical signal triggers notification mechanism
  • Athlete modifies training accordingly
design 1
Design 1
  • Saliva and blood lactate levels show high correlation
  • Embed microfluidic lactate sensor in mouth guard

sensor & processor

design problem
Design Problem
  • Wires running from mouth guard would be cumbersome
  • Cost of microprocessor for wireless data collection is prohibitive
    • $150 – 800

5

design 2
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
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
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
Future
  • Decide on design
  • Synthesize
  • Validate
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