Upgraded Maltese Corrugated Catheter

The Upgraded Maltese Corrugated Catheter is a flexible, self-straightening catheter with a corrugated shaft designed for optimal lumen patency, tissue compliance, and reduced encrustation.

Design and Structure

The catheter features a spiral or annularly corrugated shaft made from thin-walled, foil-like material that elastically returns to its original shape after deformation. This design allows the lumen to remain nearly circular under external pressures of 10–100 mbar, while the shaft can bend 30–90 degrees without significant lumen narrowing. If a critical deflection angle is exceeded, the catheter transitions into a force-neutral axial fold, maintaining structural integrity and minimizing trauma to surrounding tissues .

Material and Coatings

Modern versions of this catheter are often made from silicone or hydrophilic-coated elastomers, which are hypoallergenic, biocompatible, and reduce encrustation. Some models incorporate antimicrobial coatings, such as silver or nitrofurazone, to inhibit bacterial growth and lower the risk of catheter-associated urinary tract infections . These coatings can be applied internally, externally, or both, enhancing long-term safety and performance.

Functional Advantages

• Self-erecting and flexible: The corrugated design allows the catheter to bend and navigate anatomical curves while maintaining lumen patency .
• Multi-lumen capability: Some upgraded catheters include multiple minor lumens for imaging, electrical diagnostics, or therapeutic delivery, improving procedural versatility .
• Reduced encrustation and irritation: Silicone and coated surfaces minimize urethral irritation and prevent blockage, making them suitable for long-term use .
• Enhanced pushability and trackability: Reinforced shafts with braiding or coil structures improve torque transmission and ease of insertion, particularly in interventional procedures .

Clinical Applications

The upgraded Maltese corrugated catheter is suitable for:

• Urinary drainage in patients with chronic retention or incontinence
• Minimally invasive interventions, including electrophysiology and structural heart procedures
• Long-term catheterization where reduced encrustation and tissue trauma are critical

Summary

By combining corrugated shaft geometry, elastic self-straightening materials, antimicrobial coatings, and multi-lumen functionality, the upgraded Maltese corrugated catheter offers superior flexibility, safety, and clinical performance compared to traditional latex or standard silicone catheters . It is particularly advantageous for long-term use, complex anatomical navigation, and procedures requiring precise catheter control.