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User-Informed Medical Device Development: A Case Study for Pediatric Malnutrition Assessment.
Kristi Thaete1, Kasey Rowzer1, Karen Stephens1
1Children's Mercy Hospitals and Clinics, Kansas City, MO, USA.
Global Pediatric Health
|July 31, 2019
Summary
A new device simplifies pediatric malnutrition screening by providing mid-upper arm circumference (MUAC) and z-score. Nutrition providers found it easy to use, efficient, and convenient after iterative design improvements.
Area of Science:
- Pediatric Nutrition
- Medical Device Development
- Public Health
Background:
- Mid-upper arm circumference (MUAC) is a standard metric for pediatric malnutrition.
- MUAC z-score implementation presents logistical challenges.
- A novel device integrating MUAC and z-score measurement was developed.
Purpose of the Study:
- To assess the usability of a new device for measuring mid-upper arm circumference (MUAC) and its corresponding z-score in pediatric patients.
- To evaluate the device's efficiency and convenience for nutrition services providers.
- To gather user feedback for iterative device refinement.
Main Methods:
- Single-center study involving nutrition services providers using the device on children aged 2 months to 18 years.
- Surveys assessed task performance ease, benchmarking, and user experience.
- Thematic analysis of open-ended feedback guided device improvements.
Main Results:
- Sixty users provided 280 survey responses.
- Increased device use correlated with reduced measurement time and improved ease of performing critical tasks.
- User feedback focused on design and materials, leading to iterative refinements.
Conclusions:
- End-user engagement in real-world testing facilitated device refinement for nutrition professionals.
- The finalized device is considered easy to use, efficient, convenient, and preferred by most dietitians.
- This innovation addresses logistical gaps in implementing MUAC z-score for malnutrition assessment.
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