Barostat to Measure Esophageal Strictures

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Barostat to Measure Esophageal Strictures

• Bayley Denham, Katie Mantz
• University of Wisconsin-Madison
• Biomedical Engineering Design 200/300

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Client
Dr. Mark Reichelderfer Department of
Medicine Gastroenterology Division Dr. Said
Adnan Gastroenterology Division
Advisor J. Aura Gimm
Department of Biomedical Engineering
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Overview

• Introduction
• Problem Statement
• Background Information
• Product Design Specifications
• Design Alternatives
• Future Work Ideas

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Problem Statement

• The purpose of this project is to improve a
  device that will measure the size of an
  esophageal stricture and compliance of stricture
  tissue.

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Background Information

• GERD (gastroesophageal reflux disease)
• Acid burns tissue and causes strictures
• Symptoms heartburn, food sticking sensation
• Narrowing of esophagus (25mm to 2-15mm)

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Dilation Procedure

• Balloon technique
• Uses endoscope and catheter
• Uses pressurized gun
• Takes about 20 minutes

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Design from Previous Semester

• Two-syringe inflation system
• Displays pressure volume readings
• Can determine compliance
• Not yet tested

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Product Design Specifications

• Device must be simple to use
• Results must be easy to understand
• To be used multiple times a day
• Easy to incorporate into procedure room
• No added time, complications, or costs to
  procedure

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One-Syringe Design

• Replace two syringes with single syringe
• Adaptor for 2 sensors and balloon catheter
• Advantage More compact, simpler, increased
  stability
• Disadvantage Use air or water?

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Crank System

• Improved way to steadily depress syringes
• Steady, constant force applied to syringes
• Less force required/easier to manually compress
  handle
• Disadvantage Counter-top required, not hand-held

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Air-Pump System

• Design hand-held pump-system, similar to
  blood-pressure cuff inflator
• Easier to inflate, than using syringes
• Pump attaches to sensors for volume pressure
  measurements

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Gun With Adaptor

• Reverts back to original gun inflation system
• Air inflation
• Adaptor to connect sensors and balloon to gun tip

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Design Evaluation
Design Matrix
5 is the highest rating
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Future Work

• Choose design to pursue
• Collaborate with other team members
• Research more accurate sensors
• Modify and test prototype

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Questions?