Medical device companies engage in human factors and usability engineering to understand and mitigate potential sources of device risk while building safer and more effective medical devices for end users. Human factors engineers work to understand how the intended users of a device will engage with the device, in order to design a user-device interface that promotes correct, error-free use of the device without endangering the user.
Engineers understand the user-device system by analyzing the ways in which device users:
The device-user interface is not limited to just the device and the user - it includes all of the components that the user interacts with while preparing the device for use to encompass all functions and requirements of the device (changing batteries, cleaning it, replacing a part, etc.)
Human factors and usability play an important role in establishing the safety and efficacy of a medical device. It is estimated that up to 50% of medical device failures are tied to design issues that lead to user error, and data from the FDA shows that 36% of medical device product recalls are initiated due to problems with medical device design.
As medical devices increasingly rely on technology, software design failures have become the leading cause of medical device recalls. Medical device companies that do not adequately ensure the quality of the software in their devices create added risk of software anomalies that can have costly mistakes.
The main purpose of human factors research is to ensure that the design of the medical device, along with its labeling, instructions and packaging, promote safe and effective use on the part of the end user. Human factors research allows product design engineers to incorporate ergonomic design into their essential requirements.
The goal of human factors research is to understand the interactions between medical devices and their users in the context of a specific use environment. Engineers and human factors researchers must analyze interactions between the device and the end user in the intended use environment in order to create realistic models of risk. The sophistication of the end user should also be considered - will the device be used by the patient, a nurse, a physician, or a home health-care worker?
Medical device companies are responsible for maintaining their design control and risk management files as part of a quality management system. The human factors and usability research process will generate documentation that describes how users interact with the device and validates that the device presents an acceptable level of risk with respect to its device risk classification.
Greenlight Guru's medical device QMS software offers a purpose-built solution for medical device companies seeking to establish and maintain human factors documentation and comply with the FDA QSR for medical devices.