TEAM MEMBERS: Miguel Benson, Erik Bieging, Ross Gerber, Aman Ghotra, Abdikarim Mahamud Department of Biomedical EngineeringAbstractBackgroundBackground/MotivationProblem StatementDesign ConstraintsOverview of the DesignRecline Lock MechanismSliding Strap AnchorBack Rest TrackLeg SupportMaterials and CostSubject TestingTesting (cont.)Future ConsiderationsAcknowledgements: We would like to thank Dr. Tom Brazelton and his colleagues, and Biomedical Engineering Department for providing us an opportunity to work on this project. Also, we would like to thank our advisor, Mitch Tyler, for providing us feedback and pointing us in the right direction.AMBULATORYCHILD SAFETY SEATTEAM MEMBERS:TEAM MEMBERS: Miguel Benson, Erik Bieging, Ross Gerber, Miguel Benson, Erik Bieging, Ross Gerber, Aman Ghotra, Abdikarim Mahamud Aman Ghotra, Abdikarim MahamudDepartment of Biomedical EngineeringDepartment of Biomedical EngineeringTEAM ADVSIOR: Mitch Tyler, MS PEDepartment of Biomedical EngineeringTEAM CLIENT: Tom Brazelton, MD, MPHDepartment of PediatricsUW-Madison Hospital and ClinicsAbstractAbstractWe propose a physical prototype of a gurney-compatible- We propose a physical prototype of a gurney-compatible- child seat for transporting children in ambulances. Current child seat for transporting children in ambulances. Current seats do not recline; Emergency Medical Technicians seats do not recline; Emergency Medical Technicians (EMTs) must unstrap the child out of seat and remove the (EMTs) must unstrap the child out of seat and remove the seat off the gurney to lay the child flat on the gurney for seat off the gurney to lay the child flat on the gurney for specific medical treatments. However, this procedure specific medical treatments. However, this procedure takes up valuable time (~3 minutes) and protracts the time takes up valuable time (~3 minutes) and protracts the time it takes to reach the hospital. As a result, our prototype it takes to reach the hospital. As a result, our prototype reclines, and eliminates the need to remove the seat off reclines, and eliminates the need to remove the seat off the gurney to lay the child flat on the gurney. Also, our the gurney to lay the child flat on the gurney. Also, our prototype supports children (1-10 years old) of various prototype supports children (1-10 years old) of various anatomical features unlike current ambulatory child seats. anatomical features unlike current ambulatory child seats. Initial testing of four subjects (1-10 year old) have given Initial testing of four subjects (1-10 year old) have given promising results but more testing needs to be done to promising results but more testing needs to be done to assess prototype’s mechanical and safety constraints. assess prototype’s mechanical and safety constraints. Also, we need to seek lighter yet robust material to Also, we need to seek lighter yet robust material to fabricate future design of the child seat. fabricate future design of the child seat.BackgroundBackground–An estimated 5000 An estimated 5000 ambulance crashes ambulance crashes annually [1]annually [1]–Safest to transport Safest to transport children sitting up(<30 children sitting up(<30 kg) in child seat kg) in child seat attached to gurney in an attached to gurney in an ambulance [2]ambulance [2]–For specific medical For specific medical conditions, EMTs must conditions, EMTs must unstrap child out of seat unstrap child out of seat and remove the seat off and remove the seat off the gurney to lay the the gurney to lay the child flat on the gurney child flat on the gurney [3][3]Background/MotivationBackground/MotivationProblems with Problems with Current Design:Current Design:–Seat does not reclineSeat does not reclineTime consuming (~3 Time consuming (~3 mins) because must mins) because must remove the seat off remove the seat off gurney to lay child flat gurney to lay child flat –Seat is bulky Seat is bulky Do not always carry Do not always carry seats in ambulancesseats in ambulances–Children more Children more prone to injuryprone to injuryProblem StatementProblem StatementDevelop a safe and compact child seat Develop a safe and compact child seat for transporting children (6-30 kg) in for transporting children (6-30 kg) in ambulances that allows Emergency ambulances that allows Emergency Medical Technicians (EMTs) to recline Medical Technicians (EMTs) to recline the child in the seat from the sitting the child in the seat from the sitting position to the lying position when position to the lying position when strapped onto a stretcher.strapped onto a stretcher.Design ConstraintsDesign ConstraintsThe Child Seat:The Child Seat:1. Must be compatible with current stretchers;1. Must be compatible with current stretchers;2. Must secure a child (up to 10 year old)2. Must secure a child (up to 10 year old)-Mass: 6-30 kg -Mass: 6-30 kg -Shoulder width:12.9-30.8 cm, -Shoulder width:12.9-30.8 cm, -Hip to shoulder height: 20-44 cm [4];-Hip to shoulder height: 20-44 cm [4];3. Must not restrict EMT’s ability to care for the child;3. Must not restrict EMT’s ability to care for the child;4. Must be cost-efficient and user-friendly;4. Must be cost-efficient and user-friendly;5. Must be collapsible;5. Must be collapsible;6. Must recline from 120-180 degrees;6. Must recline from 120-180 degrees;7. Must be easily sterilized.7. Must be easily sterilized.Overview of the DesignOverview of the DesignWe have incorporated We have incorporated four unique features four unique features that make the child that make the child seat more conducive seat more conducive to ambulance to ambulance transportation:transportation:–Recline LockRecline Lock–Sliding Strap Sliding Strap –Back Rest Back Rest –Leg SupportLeg SupportOverview of Design ConceptRecline Lock MechanismRecline Lock MechanismFunction: Function: –Reclines the seatReclines the seatMechanism: Mechanism: –Similar to a hinge joint Similar to a hinge joint –2 plates joined at center rotate 2 plates joined at center rotate freely about the jointfreely about the joint–1 plate permanently fixed to the 1 plate permanently fixed to the seat while the other is attached to seat while the other is attached to the back rest on a rail mechanismthe back rest on a rail mechanism–Lock in position with pinLock in position with pinMaterials: Materials: –Wood and Screws Wood and Screws Figure A: Design ConceptFigure B: Prototype Model Figure C: