S

Integrated Transport System for Children with

CPProgress Presentation

Group 14David Dwight, Gayathri Srinivasan, Joseph Tejan

Project Need

Cerebral Palsy (CP): a group of permanent, non-progressive, movement problems Transport modalities formed

Mobility means access Education, social activities, sports teams

Estimated 500,000 children with CP 77% with spastic CP

(CDC)

Litte to No Walking Ability

30%

Walking with Device16%

Unaided Walk-ing

54%

Primary Mode of Transport in Age 5 Children with Cerebral Palsy

Surveillance of Cerebral Palsy in Europe (Eckung E, Hagberg G, et al)

Project Scope

• Design an integrated system that is easily transported and intuitive and fully functional

Purpose• A) Develop a theoretical model• B) Identify adjustable/customizable

parts• C) Create physical prototype of key

elements

Goals

• Due to time and funding constraints a fully realized physical model will not be produced

Exclusions

Design Requirements

Cost and Constructio

n

< $1500 system

Lightweight but

durable

Portability and Weight

Compact; fit in

average trunk

Loadable into car,

train, etc.

Functionality

Intuitive to convert

Equally functional to each system

Safety

Prevent tipping

Longevity of product

Design Alternatives: Overview

The designs loosely fall into two main categories Branches for further investigation of alternatives

First, System Packaging Create ability for various items to be attached or

stored into neat system

Second, System Conversion Items are combined together and convertable

Design Alternatives, cont.

Features:• Telescoping

cane / wheelchair handles

• Walker storage on back of wheelchair

Features:• Telescoping

cane / wheelchair handles

• Walker storage underneath wheelchair

Features:• Uses folding

chair design • Front

assembly of walker attachable

• Bag on wheelchair for storage

Design Alternatives, cont.

Features:• Spring-

loaded seat concept

• Naturally in the upright position

• Primarily walker

Features:• Added seat

concept• Detachable,

foldable seat• Primarily

walker

Features:• 3 sets of

wheels concept

• Native position as wheelchair

• Rotating set of wheels for walker

Safety

F = 58.8 NMax t = .88 Nm

F = 19.6 NMax t = 1.58 Nm

F = 14.7 NMax t = 2.35 Nm

Analysis: Materials

Examined frame material, tubing shape, nylon vs. vinyl, wheel material, wheel functionality

Analysis: Designs

Walker Stored Underneath design scores highest on weighted Pugh Chart

Walker Stored Underneath Wheelchair

Advantages Better safety and stability Functionality is optimal since in combines individual

systems Comfort of person is high due to full wheelchair design Easily fulfills weight bearing guidelines No need for collapsing mechanics on wheelchair

Disadvantages Cost Weight

Thank You

Sources

auditorium seating: http://www.ki.com/uploadedfiles/Docs/literature-samples/techdocs/Tech-Spec_Concerto-Auditorium-Seating.pdf

average weight of 12 year old child: http://www.disabled-world.com/artman/publish/height-weight-teens.shtml

Walker image http://www.1800wheelchair.ca/product/4513/nimbo-walker-medium-child-posterior-walker

Image of circle and square for round vs. squarehttp://blog.velocite-bikes.com/frame-design/#sthash.upRq40rQ.dpbs

Metals Depot aluminum tubing prices http://www.metalsdepot.com/catalog_cart_view.php?msg=

Physical Characteristics of various metalshttp://asm.matweb.com/search/SpecificMaterial.asp?bassnum=MQ304A

Prevalence and Incidence of Cerebral Palsyhttp://cerebralpalsy.org/about-cerebral-palsy/prevalence-and-incidence/

CDC Fact Sheethttp://www.cdc.gov/features/cerebralpalsy/

Prevalence of cerebral palsy… and motor funcitoninghttp://www.ncbi.nlm.nih.gov/pubmed/24117446