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CME Quiz


Journal of Prosthetics and Orthotics: July 2017 - Volume 29 - Issue 3 - p 119-120
doi: 10.1097/JPO.0000000000000134
  • Free


  1. Read the article on pages 112–118.
  2. Complete the examination.
  3. Submit your completed examination to the Academy per the directions on the next page.


The following questions require short answers only; you do not have to use complete sentences. All questions refer to the article, A Comparative Study of Functional Grasp and Efficiency Between a 3D Printed and Commercial Myoelectric Transradial Prosthesis Using Able-Bodied Subjects: A Pilot Study, Gurinder S. Bains, MD, PhD, et al.


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JPO QUIZ - A Comparative Study of Functional Grasp and Efficiency Between a 3D Printed and Commercial Myoelectric Transradial Prosthesis Using Able-Bodied Subjects: A Pilot Study, Gurinder S. Bains, MD, PhD, et al.

  1. [Select the correct response] The primary focus of this study was to determine if 3D printed myoelectric hands are:
    1. Cheaper than commercially produced hands
    2. More durable than commercially produced hands
    3. More cosmetic than commercially produced hands
    4. More efficient than commercially produced hands
  2. [Select the correct response] According to this article, all of the following statements about 3D printed upper-limb prostheses are accurate EXCEPT:
    1. The technology is improving rapidly.
    2. They are less expensive than other prostheses.
    3. They are more effective than conventional or commercial myoelectric prostheses.
    4. There is a broad network of people collaborating to make the technology available.
  3. [Select the correct response] How many subjects were included in this study?
    1. 1
    2. 8
    3. 24
    4. 60
  4. [Select the correct response] The i-limb ultra has two sensors that can be placed, but in this study, only one electrode was used. Which statement best explains why?
    1. The second sensor impeded the function of the device.
    2. An adequate site for the second sensor was not accessible.
    3. The second sensor required significant additional work to install.
    4. Using one electrode mimicked the 3-electrode setup of the 3D prosthesis.
  5. [Select the correct response] When were the trials for the two devices performed?
    1. The same day
    2. Two weeks apart
    3. At random intervals
    4. After the subjects wore the devices for several weeks
  6. [Select the correct response] All of the following statements accurately summarize the results of this study EXCEPT:
    1. The i-limb outperformed the Limbitless arm on the Box and Blocks Test (BBT).
    2. The Limbitless Arm was not functional as a prosthetic device.
    3. The i-limb was reported to be heavier than the Limbitless Arm by 25% of the participants.
    4. Men had a more significant increase in efficiency than women when wearing the i-limb.
  7. [Select the correct response] One reason the authors gave as a potential explanation for why the i-limb outperformed the Limbitless Arm was:
    1. The Limbitless arm was much more lifelike than the i-limb.
    2. The subjects had more time to adapt to the i-limb than the Limbitless Arm.
    3. The i-limb was significantly lighter and led to less fatigue than the Limbitless Arm.
    4. The Limbitless arm uses hobby-grade components instead of commercial components.
  8. [Select the correct response] Fitting issues for the custom attachment devices included all of the following challenges EXCEPT:
    1. They were bulky and heavy.
    2. The wooden handle participants grasped caused pain.
    3. Some participant’s forearms were too big for the device.
    4. The device caused skin breakdown over the dorsum of the hand.
  9. [True or False]___________ This study was performed using able-bodied individuals.
  10. [True or False]___________ The Box and Blocks Test has not yet been shown to have validity or reliability.
  11. [True or False]___________ The joints of the digits of the Limbitless hand lacked rigidity that may have contributed to its lower score on the BBT.
  12. [True or False]___________The authors suggest conducting additional research on individuals who have sustained amputations.

Complete the JPO Self-Assessment Examination on the previous page and score a minimum of 80 percent to earn two MCE credits. Send the completed examination and payment in U.S. currency ($20 for Academy members, $50 nonmembers) to: American Academy of Orthotists and Prosthetists, 1331 H Street NW, Suite 501, Washington, DC 20005. The examination must be received by the Academy within three years of the publication date for credit to be awarded.

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