Percutaneous transluminal angioplasty: general principles

Area of Science:

• Vascular Surgery
• Interventional Radiology
• Medical Device Technology

Background:

• Balloon catheters have driven the rise of percutaneous transluminal angioplasty (PTA) in the US.
• Current balloon catheters include double-lumen and coaxial systems, with material variations like polyethylene offering enhanced strength.
• Technological advancements necessitate specific equipment, such as automatic pressure injectors for coaxial systems.

Purpose of the Study:

• To review the current state and popularity of percutaneous transluminal angioplasty (PTA).
• To discuss the available technologies and materials used in balloon catheters for PTA.
• To outline the recommended practices and considerations for performing PTA.

Main Methods:

• Review of current balloon catheter technologies, including materials (polyvinyl, polyethylene) and system designs (double-lumen, coaxial).
• Discussion of necessary ancillary equipment, such as automatic pressure injectors and balloon inflation pressure monitoring devices.
• Analysis of procedural considerations, including the lack of consensus on anticoagulant therapy and the importance of noninvasive hemodynamic studies.

Main Results:

• Polyethylene balloon catheters offer superior tensile and yield strength compared to polyvinyl.
• Automatic pressure injectors are essential for coaxial systems but not for single catheters or larger balloons.
• Devices for monitoring balloon inflation pressure are available and recommended for use.

Conclusions:

• PTA is a valuable procedure with a low complication rate when performed by experienced angiographers in appropriate facilities.
• Noninvasive hemodynamic studies are crucial for both intra-procedural monitoring and long-term patency evaluation.
• Optimal patient management involves a multidisciplinary approach, including primary physicians, vascular radiologists, and vascular surgeons.