Medical devices involve specialized engineering, materials science, and regulatory vocabulary that can be difficult to decode. This glossary of medical device terms explains more than 40 words commonly encountered on device packaging, in Instructions for Use documents, or during discussions with a healthcare provider, organized into helpful categories for quick reference.
Materials and Engineering Terms
Biocompatibility — A material's capacity to function in the body without a harmful biological response.
Cobalt-chromium (CoCr) alloy — A strong, corrosion-resistant alloy commonly used in stents and implants.
Titanium alloy (Ti-6Al-4V) — A medical-grade titanium alloy valued for strength-to-weight ratio, common in orthopedic implants.
Nitinol — A nickel-titanium alloy known for shape-memory and flexibility, used in guidewires and stents.
Radiopaque marker — A dense-metal component, often platinum-iridium, that appears clearly on X-ray to show device position.
Strut — An individual structural component of a stent's mesh framework.
Strut thickness — The width of a stent strut, often measured in micrometers, which can influence vessel conformability.
Hydrophilic coating — A surface coating that becomes slippery when wet, easing device insertion.
Laser-cut — Precision laser manufacturing used to cut fine device structures, such as stent patterns, from tubing.
Polymer — A synthetic or natural material of repeating molecular units, used in device components and coatings.
Device Categories and Components
Implant — A device placed in the body intended to remain for an extended or permanent period.
Prosthesis — A device designed to replace a missing or damaged body part or function.
Guidewire tip stiffness — How rigid or flexible a guidewire's tip is, often measured in grams of force.
Balloon catheter — A catheter with an inflatable balloon tip, used to widen vessels or deliver devices.
Delivery system — The catheter and handle mechanism used to position and deploy an implantable device.
Retrievable device — A device, such as certain IVC filters, designed for removal once clinical need passes.
Drug-eluting — Describing a device coated with medication released gradually at the treatment site.
Radial fiber — A laser fiber emitting energy evenly around its circumference, used in endovenous laser systems.
Open-cell design — A flexible stent structural pattern that conforms readily to vessel curves.
Closed-cell design — A more rigid stent structural pattern with different mechanical properties than open-cell.
Locking plate — An orthopedic fixation plate whose screws lock into the plate, creating a fixed-angle construct.
Intramedullary (IM) nail — A metal rod inserted into a long bone's hollow center to stabilize a fracture.
Regulatory and Quality Terms
European market authorization — Conformity marking showing a device meets EU requirements under the applicable European medical device regulations.
the applicable European medical device regulations — The EU's Medical Device Regulation, governing device safety, performance, and clinical evaluation.
internationally recognized quality management standards — A quality management system standard specific to medical device manufacturing.
Instructions for Use (IFU) — The document detailing a device's intended use, contraindications, and handling.
Intended use — The specific medical purpose for which a device is designed and authorized.
Indications — The specific conditions or patient populations for which a device is intended.
Contraindication — A situation in which a device or procedure should not be used due to potential risk.
Post-market surveillance — Ongoing monitoring of a device's real-world performance after commercial release.
Patent — Legal protection for a novel invention, preventing unauthorized manufacture or sale.
Single-use device — A device intended for one patient during a single procedure, not for reprocessing.
Procedure-Adjacent Device Terms
Access sheath — A short tube at the vessel entry point allowing device exchange.
Deployment — Releasing or expanding a device, such as a stent, from its delivery system.
Occlusion device — A device designed to block blood flow through a vessel, such as a vascular plug.
Aspiration system — A device using vacuum or suction to remove clot material from a vessel.
Rotational atherectomy device — A device using rotation to remove or modify plaque within an artery.
Neuromodulation device — A device, such as a spinal cord stimulator, that delivers signals to modify nerve activity.
Telemetry device — A device that remotely transmits physiological data, such as heart rhythm.
Sterilization — A validated process ensuring a device is free from viable microorganisms.
Frequently Asked Questions
What is the difference between European market authorization and U.S. regulatory approval?
European market authorization indicates conformity with European Union medical device regulations, while U.S. regulatory clearance or approval reflects United States regulatory review. Regulatory status varies by country.
Why do device descriptions include so many material specifications?
Material choice, such as titanium alloy or cobalt-chromium, directly affects a device's strength, flexibility, and biocompatibility. These specifications help clinicians understand expected device behavior.
Where can I find the official terminology for a specific device I've been prescribed?
The device's Instructions for Use (IFU) document is the authoritative source for terminology specific to that product. Your healthcare provider can also clarify unfamiliar terms.
Related INVAMED Resources
- Coronary Artery Disease & Cardiac Interventions
- Orthopedic & Trauma Solutions
- Comprehensive Catheter & Guidewire Systems
- Digital Health & Remote Monitoring
- Contact INVAMED for More Information
Medical Disclaimer: This article is provided for general informational and educational purposes only and does not constitute medical advice, diagnosis, or treatment recommendation. It is not a substitute for consultation with a qualified healthcare professional. Product indications, availability, and regulatory status vary by country. Always refer to the official Instructions for Use (IFU) and consult a licensed physician for guidance specific to your situation. INVAMED devices are intended for use by trained healthcare professionals.