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Elimination of mechanical failure of the Hickman right atrial catheter
Insights
A modified Hickman catheter with a Silastic bead significantly reduces mechanical failures in central venous catheters. This simple modification ensures proper tip placement and secure fixation, improving overall catheter function in patients.
Area of Science:
- Medical Devices
- Vascular Access
- Hematology
Background:
- Hickman catheters are commonly used for central venous access.
- Mechanical complications, such as slippage and occlusion, often occur with standard Hickman catheter placement.
- These complications are linked to issues with securing the catheter and incorrect tip positioning.
Purpose of the Study:
- To evaluate a modified Hickman catheter design aimed at improving mechanical stability.
- To compare the incidence of mechanical failure between standard and modified (beaded) Hickman catheters.
Main Methods:
- A retrospective comparison of two patient series (leukemia patients) was conducted.
- One series received standard Hickman catheters, while the other received modified catheters with a Silastic bead.
- Catheter fixation and tip placement in the right atrium were key parameters.
Main Results:
- The modified beaded Hickman catheters showed complete elimination of mechanical problems (0/18).
- Standard unbeaded catheters experienced significant mechanical failure (7/23).
- Proper fixation at the venotomy site and right atrial tip placement were crucial.
Conclusions:
- A Silastic rubber bead modification effectively secures Hickman catheters, preventing mechanical failure.
- This modification, combined with correct tip placement, markedly improves Hickman catheter function and reliability.
- The beaded catheter design offers a significant advantage in managing central venous access.
Abstract:
The double lumen Hickman right atrial catheter (Evermed Co., Palo Alto, Calif.) is usually inserted through an open venous cutdown into the internal jugular or cephalic vein. It is difficult to mechanically secure. Tight ligatures around the vein opening and catheter occlude the lumen of the Silastic rubber catheter while loose ligatures allow slippage. Migration of the tip into the vena cava or innominate vein causes fibrin sleeve formation and occlusion. Because of problems during the initial use of this catheter, we modified a subsequent series by placing a Silastic rubber bead on the catheter. The catheter is carefully trimmed so that the tip will lie in the right atrium and the bead is placed into the vein proximal to the securing ligature. Comparison of the two series of primarily leukemic patients revealed complete elimination of mechanical problems in patients with beaded catheters (0/18), and significant mechanical failure in unbeaded catheters (7/23). These data indicate that adequate fixation of the Hickman catheter at the level of the venotomy and placement of the tip in the right atrium eliminates mechanical failure and markedly improves catheter function.