Device Types and Safety Classes
The medical device market continues to grow across general devices, cardiovascular solutions and surgical or infection control. SequoiaAT has worked with global leaders and innovative startups across domains including disposable colonoscope concepts, automated sterilizers, blood glucose meters and implantable drug delivery devices.
Three broad device types exist: diagnostic, therapeutic and implantable. Safety based classes run from Class I to Class III. The rigor of design controls, testing and regulatory evidence scales with the class, prior product history and whether it is the first of its kind.
Design Controls and Risk Management
DFMEA and PFMEA with action tracking. System and software hazard analysis linked to risk files. Reliability prediction and accelerated stress methods where appropriate.
Requirement trace matrix mapping needs to verification and validation. Documentation and traceability maintained across each phase to support audits and change control.
COTS component validation and supplier assessment. User interface design that supports safe use and clear feedback. PCB layout, fabrication, assembly and test engineering.
Risk is addressed in three parts. Remove or reduce risks during design. Protect against remaining risks with engineering controls, labeling or alarms. Inform users about residual risks that cannot be engineered out.
Software, Connectivity and Cybersecurity
Modern devices often blend embedded firmware, mobile applications and cloud dashboards. We implement real time firmware, secure connectivity such as BLE or Wi Fi and cloud ingestion with role based access. Software verification and validation are integrated with continuous testing to reduce defects and improve release quality.
For software components, IEC 62304 defines the specific lifecycle and documentation requirements that feed into broader verification and validation activities. In connected devices, validation work often needs to cover not just the hardware and firmware in isolation but the complete system including companion apps, cloud services, and any data paths that touch clinical decisions.
Regulatory guidance on medical device cybersecurity has grown significantly. FDA expectations now include a Software Bill of Materials, a coordinated vulnerability disclosure process, and a plan for patching and update management across the marketed lifetime of the device. SequoiaAT incorporates threat modeling, secure boot, encrypted communications, and patch management planning into device projects that include any form of wireless or network connectivity.
Transfer to Manufacturing and Post Market
Design transfer is a defined step in regulated device development. It covers the transition from a verified design to a manufacturing process that can reproduce that design reliably at scale. Transfer documentation typically includes device master records, process specifications, acceptance criteria, and equipment qualification records. A poorly managed transfer is one of the more common reasons that a device cleared for market takes longer than expected to reach volume production.
Post market surveillance is an ongoing obligation, not a one time study. Regulated markets require a plan that defines data sources, review frequency, and the threshold at which a signal triggers a corrective action or a regulatory notification. Teams that maintain a well structured design history file from the start of a project find change control considerably more tractable because the evidence base is already organized and traceable.
Common Questions About Medical Device Development
What safety classes do medical devices fall into?
Medical devices are classified as Class I, Class II, or Class III based on risk level. The rigor of design controls, testing, and regulatory evidence scales with the class, prior product history, and whether the device is a first of its kind.
What design controls does SequoiaAT apply in medical device development?
Design controls include DFMEA and PFMEA with action tracking, system and software hazard analysis linked to risk files, requirement trace matrices mapping needs to verification and validation, COTS component validation and supplier assessment, and user interface design that supports safe use.
How does SequoiaAT manage software risk in connected medical devices?
Risk is addressed in three steps: removing or reducing risks during design, protecting against remaining risks with engineering controls and alarms, and informing users about residual risks that cannot be engineered out. Software verification and validation are integrated with continuous testing throughout the development lifecycle.
What is verification vs validation in medical device development?
Verification confirms that design outputs meet design inputs at each stage of development. Validation confirms that the finished device meets user needs and intended use. Both are required under design control frameworks such as 21 CFR Part 820 and ISO 13485.
How does SequoiaAT address cybersecurity in connected medical devices?
SequoiaAT incorporates threat modeling, secure boot, encrypted communications, and patch management planning into device projects that include any form of wireless or network connectivity. FDA expectations now include a Software Bill of Materials, a coordinated vulnerability disclosure process, and a plan for patching and update management.