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In vitro microbiology studies on a new peritoneal dialysis connector
Giovanni Di Bonaventura1, Paolo Cerasoli, Arianna Pompilio
1Center of Excellence on Ageing, G. d'Annunzio, University, Chieti, Italy. gdibonaventura@unich.it
Objective:
We evaluated the ability of a recently developed peritoneal dialysis (PD) connector to prevent the risk of bacterial transfer to the fluid path after simulated touch and airborne contamination.
Methods:
Staphylococcus epidermidis ATCC1228 and Pseudomonas aeruginosa ATCC27853 strains were used. For touch contamination, 2 μL of a standardized inoculum [1×10(8) colony-forming units (CFU) per milliliter] were deposited on top of the pin closing the fluid path of the patient connector. For airborne contamination, the patient connector was exposed for 15 seconds to a nebulized standardized inoculum. To simulate the patient peritoneum and effluent, the patient connector was pre-attached to a 2-L bag of sterile PD solution. After contamination, the patient connector was attached to the transfer set, the pin was captured, flow control was turned to simulate "patient drain" into the empty bag, and then "patient fill" using the bag pre-attached to the connector. Finally, a new pin was recaptured. The PD solution collected in the bag pre-attached to the connector was run through a 0.20-μm filter for colony counts.
Results:
No infected connector transferred bacteria to the fluid path, regardless of the challenge procedure or the strain used.
Conclusions:
Our results show that the new PD connector may fully obviate the risk of bacterial infection, even in the presence of heavy contamination. Further studies are in progress to test our PD connector in a clinical setting.
Insights
A new peritoneal dialysis (PD) connector effectively prevents bacterial transfer to the fluid path, even with significant touch or airborne contamination. This innovation may eliminate the risk of bacterial infection in PD patients.
Area of Science:
- Nephrology
- Infectious Disease Prevention
- Biomedical Engineering
Background:
- Peritoneal dialysis (PD) is a vital treatment for kidney failure.
- Bacterial contamination of the PD fluid path poses a significant risk of infection.
- Novel connectors are needed to enhance PD safety and reduce infection rates.
Purpose of the Study:
- To evaluate a new peritoneal dialysis (PD) connector's efficacy in preventing bacterial contamination.
- To assess the connector's performance under simulated touch and airborne contamination scenarios.
Main Methods:
- Simulated touch and airborne contamination with Staphylococcus epidermidis and Pseudomonas aeruginosa.
- Testing the PD connector's ability to block bacterial entry into the fluid path.
- Analysis of PD solution for bacterial presence after simulated contamination events.
Main Results:
- The new PD connector demonstrated complete prevention of bacterial transfer.
- No bacteria were detected in the fluid path, irrespective of contamination method or bacterial strain.
- The connector successfully maintained fluid path sterility under rigorous testing.
Conclusions:
- The evaluated PD connector effectively eliminates the risk of bacterial contamination.
- This novel device shows promise in preventing PD-related infections.
- Clinical studies are planned to further validate the connector's performance.
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