Term: Guidewire

Category: Medical Devices

Definition: A guidewire is a thin, steerable medical tool usually made from stainless steel or a nickel–titanium alloy. It is used to move through blood vessels or ducts inside the body. It creates a safe path so catheters, stents, or other tools can be guided to the desired area. Guidewires can be coated with a slippery, hydrophilic coating to lower friction and make them easier to move through tight or twisted vessels. They often have a strong core for control, a flexible tip to prevent injury, and a smooth surface to help them slide forward.

How it Works: 

• Inserted first into a vessel or duct under imaging guidance.
• The guidewire’s flexible tip helps safely navigate through curves or obstructions.
• Once positioned, other devices (e.g., catheters, balloons, or stents) are advanced over it.
• After device placement, the guidewire is withdrawn, leaving the device in position.

Common Uses:

• Cardiovascular procedures such as angioplasty and stent placement.
• Endovascular interventions for accessing blocked or narrowed vessels.
• Urological procedures for inserting catheters into the ureters or bladder.
• Gastrointestinal and biliary procedures for guiding endoscopic tools.
• Central venous access to facilitate safe catheter placement.

Related Content and Resources: 

Hydrophilic Guidewire Coatings Intro, uses and 5 Benefits

Hydrophilic Coatings for Medical Devices: Intro, Benefits & Uses