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Pointdexter: A Prosthetic Fingertip Terminal Device

Award Information
Agency: Department of Health and Human Services
Branch: National Institutes of Health
Contract: 2R44HD090800-02A1
Agency Tracking Number: R44HD090800
Amount: $1,302,891.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: NICHD
Solicitation Number: PA18-573
Timeline
Solicitation Year: 2018
Award Year: 2019
Award Start Date (Proposal Award Date): 2019-08-09
Award End Date (Contract End Date): 2021-07-31
Small Business Information
325 HOPPING BROOK RD STE A
Holliston, MA 01746-1456
United States
DUNS: 050467997
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 TODD FARRELL
 (508) 893-6363
 todd.farrell@liberatingtech.com
Business Contact
 TODD FARRELL
Phone: (508) 893-6363
Email: todd.farrell@liberatingtech.com
Research Institution
N/A
Abstract

Abstract
The proposed dexterous terminal device technology would allow amputees more utility from their prosthetic
hands and fingers, in tasks requiring fine grasping, such as in tying shoes or in work activities, such as
manufacturing small components. Bilateral amputees would be able to achieve fine dexterity with two multi-
articulating hands. All users would be able to have the best aspects of fine-motor control, gross function, and
cosmetic appeal in a single terminal device.Project Narrative
Modern dynamic upper limb prosthetic terminal devices tend to either be functional or cosmetic, with most
common designs making compromises between both aspects. Prosthetic hooks and grippers are particularly
good at grasping a variety of objects but are not cosmetic. Conventional electric hands are more cosmetic, but
do not allow for conformal grasp or multiple grasp patterns and also have difficulty grasping small objects. Multi-
articulating hands are also cosmetic, can conform to larger objects that are grasped, and offer multiple grasp
patterns. However, multi-articulating hands still have difficulty grasping and manipulating smaller objects. As no
single terminal device meets all of the criteria of an ideal terminal device, users often have to physically remove
and don different terminal devices to achieve the variety of tasks that they need to perform in their activities of
daily living (ADLs). The proposed solution aims to combine the advantages of the common terminal devices into
one solution, by combining the practicality and dexterity of a split-hook or gripper with the aesthetics of multi-
articulating hands.
The primary objective of the proposed project is iterate, test, and commercialize novel dexterous terminal device
technology. Design criteria related to size, grasping force, etc. will be refined as iterations of the device are
created. The ability of the device to meet the design criteria will be verified through bench top testing. The device
will then be tested with prosthesis end-users using clinically validated outcomes measures. These tests will
evaluate the functionality, features, and product viability of the technology, demonstrate improvements in
function, and drive further development. Feedback from both amputees and clinicians will also be solicited to
guide design iteration.
The proposed dexterous terminal device technology would allow amputees more utility from their prosthetic
hands/fingers in tasks requiring fine grasping, such as in tying shoes or in work activities, such as manufacturing
small components. Bilateral amputees would be able to achieve fine dexterity with two multi-articulating hands.
All users would be able to have the best aspects of fine-motor control, gross function, cosmetic appeal, and
anthropomorphic acceptance in a single terminal device.

* Information listed above is at the time of submission. *

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