Title: CSF Flow Model
Names
Tim Eng – Team Leader
Lauren Hensley – BSAC
Mary Lim – BWIG
April Zehm – Communicator
Client
Victor Haughton, M.D.
UW Dept. of Radiology
Phone: 263-5306
email: vmhaughton@facstaff.wisc.edu
Date: 4/20/04 – 4/26/04
Problem Statement
The goal of this project is to create a life-size physical model of the human hindbrain and
upper cervical spinal canal. This will be used to study how varying dimensions affect
cerebrospinal fluid flow (CSF flow) in terms of velocity and pressure. Oscillatory flow is
required in the model, and pressure must be quantifiable.
Last Week’s Goals
 Meet on Wednesday, April 21 to trace the simplified shapes (circles of varying
diameters) onto the blocks. Grooves will be cut into the blocks to accommodate the
threaded rods, which will allow alignment.
 If we are unable to cut the shapes out of the blocks, they will at least be prepared for a
shop person Dr. Haughton knows.
 Drill a hole in the first block in order to fit the pressure-measuring tube.
 Fix the pump connectors to the two end blocks.
 Start final poster presentation preparation.
This Week’s Goals
 Meet on Wednesday, April 28 to finalize the prototype and perform testing.
 Complete preparations for the final poster presentation.
 Write final report.
Summary of Accomplishments
 Lauren went to a hardware store to buy 1/4” threaded rods, wing nuts, and glue.
 We met on Wednesday evening to drill holes into the blocks to achieve an overall funnel
shape. These were then filed to provide a more smooth contact surface between the
blocks.
 On Thursday, Tim drilled 3/16” holes into blocks 1, 5, and 10 so tubing can be inserted to
measure pressure.
 In class, we cut 2 grooves into each block to allow for the threaded rods. We started
making slides for the final poster presentation.
 Mary and April filed the grooves and glued the pump connectors into the end blocks.

April made additional presentation slides over the weekend.
Difficulties
 Depending on the amount of pressure generated, we might not be able to simultaneously
measure pressure in three blocks due to a lack of tubing. If this is the case, we will need
something to plug the temporarily unused holes.
 We weren’t able to find sufficient tubing in ECB for the demonstration pump, so Lauren
had to purchase some from a hardware store.
Activities
Team: 3 hours – Met on Wednesday to drill holes into the blocks, met in class to cut the
grooves and begin presentation preparation
Tim Eng: 2 hours – Drilled holes for measuring pressure, wrote progress report
Lauren Hensley: 1.5 hours – Went to hardware store to purchase threaded rods, wing
nuts, and glue
Mary Lim: 1.5 hours – Worked with April to file the grooves and glue the pump
connectors in place, updated the website
April Zehm: 7.5 hours – Prototype construction, e-mail correspondence, design notebook
update, presentation preparation
Total time this week: 15.5 hours
Cumulative time: 158.25 hours
Project Schedule
Task
Deliverables
Progress Reports
Mid-semester Presentation
Preliminary Design Report
Final Poster Presentation
Final Report
Meetings
Client
Final Meeting with Advisor
BSAC
Research
Chiari I Malformation
CSF Flow
Current Patents
Design
Brainstorming
Decide on Final Design
Drawings
Prototype
Order Parts/Materials
January
20 27
3
February
10 17 24
2
9
March
16 23
30
6
April
13 20
27
May
4 11
Machine Parts
Assemble
Test
Website
Team
Tim Eng
Lauren Hensley
Mary Lim
April Zehm
Expenses
Date
4/6/04
4/21/04
4/21/04
4/21/04
Item
Polycarbonate sheet
Stainless steel threaded rods
Wing nuts
Crazy glue
Cost
$29.76
Comments
12” x 24”x 3/8” (From McMaster-Carr)