A technique for unknotting an intracardiac flow-directed balloon catheter

Area of Science:

• Cardiology
• Medical Devices
• Interventional Procedures

Background:

• Right-sided cardiac catheterization is a common diagnostic procedure.
• Flow-directed balloon catheters are frequently used for pulmonary artery catheterization.
• Catheter entanglement is an infrequent but potentially serious complication.

Purpose of the Study:

• To describe an unusual complication encountered during right-sided cardiac catheterization.
• To present a novel technique for resolving catheter knotting during the procedure.

Main Methods:

• A 7F flow-directed balloon catheter was used for right-sided cardiac catheterization.
• The catheter became entangled and knotted in the pulmonary artery during an attempt to wedge.
• A movable core guidewire was introduced through the catheter's lumen.

Main Results:

• Initial attempts to unknot or remove the catheter were unsuccessful.
• Passage of the movable core guidewire through the catheter lumen immediately resolved the knot.
• The catheter was subsequently withdrawn without further difficulty.

Conclusions:

• Catheter knotting can occur during cardiac catheterization procedures.
• The use of a movable core guidewire is an effective method for resolving catheter entanglement.
• This technique facilitates safe catheter removal and avoids potential patient harm.