Functional Seating Design for Lumbar Puncture Procedure Team

Functional Seating Design for Lumbar Puncture Procedure Team: Amanda Feest, Chelsea Wanta, Lee Linstroth, Malini Soundarrajan BME 200/300 October 20, 2006 Client: Cynthia M. Carlsson, M. D. /M. S. UW Medical School Advisor: Kristyn Masters, Professor, Ph. D. UW College of Engineering

Overview n Problem Statement n Background n Design Requirements n Proposed Designs n Design Matrix n Future Work n Questions

Problem Statement n To design a specialized support system to maximize patient comfort and spinal curvature during lumbar puncture procedures

Background n Analyzes spinal fluid of people at risk for Alzheimer’s disease to study changes occurring in the brain n Lumbar Puncture Basic Procedure n n Spinal fluid is collected by inserting a needle into lower back Collection is easier if the patient http: //apps. med. buffalo. edu/procedures/ lumbarpuncture. asp? p=13 curves their back, opening up the space between the lumbar backbones

Existing equipment n n Currently, there is no device specifically designed for this procedure In the past, massage chairs have been used but they do not maximize spinal curvature http: //www. neurology. org/cgi/content/full/58/12/1859? cookietest=yes

Current Set-up • Current Position Problems • Uncomfortable • Does not optimize spinal curvature

Design Requirements n Proper positioning of the back n Maximize patient comfort n Must cost less than $500 to produce n Needs to be adjustable for varying patient heights n Must be able to be used in conjunction with a hospital bed n Must be portable and fit in hospital rooms

Proposed Design #1 One Piece Unit n Description n Head rest, foot rest, arm rest attached to central support column n All adjustable n locking wheels for transportation 43“ 25” Wheels

Proposed Design #1 n Pros n Easy to transport n Pieces will not get separated n Equal weight distribution for better stability n Cons n Difficult to adjust for different leg lengths n Many moving parts

Proposed Design #2 Two Piece Stand Alone Unit n Description n Separate foot rest and stand with head and arm support n Adjustable heights for all components n Stand with wheels n Foot rest attaches to base

Proposed Design #2 n Pros n Adjustable for different leg lengths n Provides optimal curvature of the spine n Adjustable angle for foot rest n Cons n Transportation difficulties

Proposed Design #3 Two Piece Table – top Unit n Description n Separate heightadjustable foot rest n Arm rest and head rest will attach to the bedside table currently in the rooms

Proposed Design #3 n Pros n Less expensive n Utilizes existing equipment n Smaller and easier to store n Cons n Not sturdy since the table does not have locking wheels n Less air flow n Difficult to transport n Foot rest movement would be limited

Design Matrix One piece unit Two piece stand-alone unit Two piece table attachment Comfort (10) 7 7 7 Stability (10) 9 9 5 Curvature of Spine (10) 7 9 6 Ease of manufacturing (10) 5 9 7 Adjustability (10) 7 9 3 Portability (5) 5 3 3 Cost (5) 4 4 5 Total (60) 44 50 36