Transcript Problem Statement - University of Wisconsin–Madison

Client: Dr. Jonathan Jaffery
Advisor- Brenda Ogle
Aaron Freis, Matthew Kudek, Jenna Spaeth, Timothy Balgemann
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Problem Statement
Femoral Vein Catheterization and Position of
Patient
Client Expectations
Available Positioners and Current Practices
Choosing a Design
Progress Now and for the Future.
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Design a leg positioner for use in femoral vein
catheterization that is optimized for the
following functions:
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Securing a patient’s leg at a set angle
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If necessary securing the pannus
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Catheter inserted distal to
inguinal ligament
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Often used for fluid
infusion or cardiac
diagnostics
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Gives access to large blood
flow for hemodialysis
d.yimg.com/.../ls/he/healthwise/n5551133.jpg
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Ideal leg position
 Knee flexed
 Hip abducted and externally
rotated
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Allows for easier catheter
insertion
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Difficult to keep in position
without holding leg
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Disposable
Does not obstruct operating field
Inhibit leg from moving during entire
procedure
Provide an attachable device to retract the
pannus
Device does not slip or rotate during procedure
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Manual method – “Nurse Restraint”
Patents:
 3,931,654
 4,730,609
 5,010,900
 7,234,180
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None of the patents are similar to our design,
or have the same functionality.
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Cuff attached to
opposite leg
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Insert foot to produce
proper angle
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Angle and length
adjustable
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Supports opposite leg
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Extends leg of interest
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Foam material
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Different sizes
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3-piece system
 Weight Plate
 Rod/Cuff
 Pannus Plate
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Securing
mechanisms
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Adjustable length
and rotation angle
Rod and
Counterweight
Foam
Wedge
Foot
Holder
Client interest (50)
50
20
5
Cost (10)
4
10
3
Meets component
expectations (10)
10
5
5
Versatility (20)
18
8
4
Total
82
43
17
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Finalized our design
Ordered parts this past
Monday
 Still need to decide on
some things yet..
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Begun discussing rough
ideas on attachment
devices
 Hinges, ball and socket
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Go to Home Depot/Menards to look for attachment
mechanisms
 Locking swivel mechanism
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Construct prototype based on already ordered
materials
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Test completed prototype on simulated catheter
procedure