Presentation summarizing the preliminary report with researches on background and existing solutions of our project. Includes our analysis of the need, the scope, and our preliminary schedule

1. Lightweight,
Waterproof
Prosthetic Arm
Group 17: Nabeel Chowdhury,
Dah Som Kim, Seul Ah Kim
September 30 2015

2. Background - Important Statistics
❏ Around 4,500 children suffer from limb deficiency yearly
❏ 1,500 babies born with limb reduction every year
❏ Congenital limb reduction twice as prevalent as traumatic amputation
❏ Ratio of upper limb amputation to lower limb amputation 1:4
❏ Only 1 in 9,400 children is considered for prosthetic fitting

3. Background - Motor Learning in Children

4. ❏ Dissatisfaction with available
prosthetic technology:
Background

5. The Need
Children need a prosthetic
arm that is/has
Light weight
Natural
appearance
Grip
strength
Precision Safety Comfort

6. Existing Solutions - Passive
Passive cosmetic prostheses (A) hand (B) arm (Lee, 732)
Gammer, Peter.
Forearm Lifter. Patent
US 5549712. 1996

7. Existing Solutions - Body Powered
Various images of body-powered prostheses (Lee, 733)

8. Existing Solutions -
Externally Powered
Laghi, Aldo. Conductive Path for Control of
Prosthetic Limbs. Patent US 5443525.
1995.
BeBionic Prosthetic Arm

9. Seamone, Woodrow. Shoulder
Disarticulation Prosthetic System. Patent
US 3866246. 1982.
Existing Solutions -
Externally Powered

10. Existing Solutions
❏ Prosthetic device for holding golf clubs (Frenzel, 1976)
❏ Discrimination algorithm of myoelectric potential (Tanie and Tachi, 1982)
❏ Myoelectrically controlled prosthesis (Hoshall, 1973)

11. Project Scope
❏ Our team aims to deliver a 3-D printed prototype of a lightweight, waterproof, and
affordable externally powered prosthetic arm to a patient.
❏ Grip Strength
❏ Precision
❏ Removable components

12. Specifications
❏ Broken down into 5 categories
❏ Electrical (pertaining to the circuit)
❏ Software
❏ Mechanical (pertaining to how the device operates)
❏ Usability
❏ Safety

13. Specifications - Electrical & Software
Maximum operating voltage 10V ± 2V
Maximum current 10mA
Maximum size of program that runs the device 1MB

14. Specifications - Mechanical
Hand size Customized
Minimum opening width of the hand 7cm
Maximum weight of the device 2kg ± 0.25kg

15. Specifications - Usability: Functionality
Grip strength 3.5kg ± 1kg
Precision 6cm ± 1cm
Hand opening/closing speed 2second
Wrist rotation 90degrees supination and pronation
Minimum battery power 16 hours
Patient can learn to use the device in 1 day

16. Specifications - Usability: Durability
Shock-resistant Drop of 1 m
Water-resistant 0.5 m under water
Heat-resistant 100 degrees Celsius for 20min
Corrosion-resistant 5% salt water

17. Specifications - Usability: general
Maximum manufacturing cost $300
Maximum resizing cost $10
Aesthetics Customized

18. Specifications - Safety
Surface current on housing of device Zero
Maximum increase in temperature 5°C
Minimum number of layers of insulation 2
Switch to turn device on/off

19. Organization of Team
❏ Nabeel: 3D modeling of the components in the device, 3D printing them, and
implementing the mechanics in the arm
❏ Dah Som: Creating the circuit design, website management, and implementing the
electrical safety requirements
❏ Seul Ah: Programing the microcontroller and writing verification tests for the
specifications

20. Design Schedule

22. Reference
1. Behrend, Calbe, et al. “Update on Advances in Upper Extremity Prosthetics”. The Journal of Hand Surgery 36A (2011): 1711-1717. Web. Sep
24. 2015.
2. Canfield, M.A., et al. “National estimates and race/ethnic-specific variation of selected birth defects in the United States”. Birth Defects Res A 76
(2006): 747-756. Web. Sep 16. 2015.
3. Frenzel, William K. Prosthetic Device for Holding Golf Clubs. Frenzel William K, assignee. Patent US 3965491 A. 29 June 1976. Print.
4. Gammer, Peter, Heinz Broeckl, and Hans Dietl. Forearm Lifter. Otto Bock Orthopaedische Industrie Besitz- Und Verwaltungs-
Kommanditgesellschaft, assignee. Patent US 5549712 A. 27 Aug. 1996. Print.
5. Hadder-Algra, Mijna, et al. “Used and functioning of the affected limb in children with unilateral congenital below-elbow deficiency during infancy
and preschool age: A longitudinal observational multiple case study”. Early Human Development 89 (2013): 49-54. Web. Sep 16. 2015.
6. Hoshall, Charles H., et al. Myoelectrically Controlled Prosthesis. The United States of America as represented by the Secretary of the Navy,
assignee. Patent US 3735425. May 29. 1973. Print.
7. Laghi, Aldo A. Conductive Patch for Control of Prosthetic Limbs. Patent US 5443525 A. 22 Aug. 1995. Print.
8. Lee, Brian, et al. “Recapitulating Flesh with Silicon and Steel: Advancements in Upper Extremity Robotic Prosthetics”. World Neurosurg 81
(2014): 730-741. Web. Sep 16. 2015.
9. Lusardi, Michelle M., and Caroline C. Nielsen. Orthotics and Prosthetics in Rehabilitation. 3rd ed. St. Louis, MO: Saunders Elsevier, 2007. Print.
10. Meier, R. H. Functional Restoration of Adults and Children with Upper Extremity Amputation. New York, N.Y.: Demos Medical Pub., 2004.
Print.
11. Muzumdar, Ashok. Powered Upper Limb Prostheses. Berlin: Springer-Verlag, 2004. Print.
12. Resnik, Linda, et al. “Advanced Upper Limb Prosthetic Devices: Implications for Upper Limb Prosthetic Rehabilitation”. Arch Phys Med Rehabil
93 (2012): 710-716. Web. Sep 16. 2015.
13. Seamone, Woodrow, et al. Shoulder Disarticulation Prosthetic System. The United States of America as represented by the Secretary of the
Navy, assignee. Patent US 3866246. Feb 18, 1975. Print.
14. Tanie, Kazuo and Tachi, Susumu. Apparatus for Discrimination of Myoelectric Potential Patterns. Patent US 4314379 A. 9 Feb. 1982. Print.

23. Questions?