Barostat to Measure Esophageal Strictures

1
Barostat to Measure Esophageal Strictures

• Team Members Hannah Kirking, Kelly Williams
• Client Dr. Mark Reichelderfer
• October 18, 2002

2
Overview

• Problem Statement
• Background Information
• Summary of Design Requirements
• Design Alternatives
• Future Work

3
Problem Statement

• A prototype was built in a past semester to
  measure the size and compliance of esophageal
  strictures. The current goal is to make
  improvements to the prototypes design and
  develop a device that models the esophagus to
  allow for proper testing of the prototype .

4
Background Information

• An esophageal stricture is a buildup of scar
  tissue that reduces the diameter of esophagus
• Strictures often caused by acid reflux.
• Severe strictures require dilation, or stretching
  out of the tissue.
• The most common dilation method is balloon
  dilation done in conjunction with an endoscopy.

5
Background Information
6
Current Prototype
7
Proposed Improvements

• Better setup ? current design is not practical
  for the medical environment
• Reduce size
• Reduce amount of force required to inflate
  balloon
• Possibly find a new way to monitor volume
  displaced

8
Design One

• Replaces syringe with a water pump-pumps constant
  volume per unit time
• Device would be turned on by the medical
  personnel-inflation of balloon would be passive.
• Pressure vs. Time proportional to Pressure vs.
  Volume

9
Design Two

• Utilizes a flow meter (example orifice meter) to
  monitor volume displaced
• Based on Bournoullis Principal of XXXXXXX.

10
Design Three

• Based on gun already used in dilation procedure
• Volume would be derived from P1V1P2V2

11
Decision Matrix