The ''Ronco'' catheter for continuous flow peritoneal dialysis.

Area of Science:

• Nephrology
• Biomedical Engineering
• Medical Devices

Background:

• Continuous flow peritoneal dialysis (CFPD) requires dual-lumen catheters for solution inflow and outflow.
• Optimizing catheter design is crucial to minimize fluid recirculation and maximize peritoneal surface exposure.
• Existing double lumen catheter designs have limitations in tip placement and fluid dispersion.

Purpose of the Study:

• To design and evaluate a novel double lumen catheter for CFPD with a diffuser tip.
• To reduce fluid recirculation and improve dialysis efficiency.
• To enhance patient comfort by avoiding increased catheter size.

Main Methods:

• Development of a novel double lumen catheter featuring a thin-walled silicone diffuser with 360-degree dispersion holes.
• Placement of the inflow lumen tip to diffuse dialysate, and the outflow lumen tip in the lower Douglas cavity.
• Evaluation of the catheter's performance regarding flow rates, pressure, and recirculation.

Main Results:

• The novel diffuser design disperses dialysate effectively at 360 degrees, reducing peritoneal wall trauma.
• The catheter achieved high flow rates with minimal pressure regimes.
• Negligible recirculation was observed, indicating improved dialysis efficiency.

Conclusions:

• The newly designed double lumen catheter with a diffuser offers significant advantages for CFPD.
• This innovative design improves fluid dynamics, reduces recirculation, and potentially enhances patient outcomes.
• The catheter's features, including the removable hub, facilitate easier surgical implantation.