10 Mechanical Complications Associated with Central Venous Catheters at a Canadian Tertiary Care Centre
Abstract Background The administration of life-saving treatment through central venous catheters (CVC) has significantly improved the quality of life and outcomes for patients, especially for those requiring long-term care. While CVC-associated bacteremia is a standard patient outcome measure, little is known about the incidence of mechanical complications in children. Although common, large data on mechanical complications are scarce and generally limited to specific paediatric populations from modest single center series. Objectives To determine the incidence of mechanical complications among paediatric patients with CVCs. Design/Methods In this retrospective study we analyzed data from all paediatric patients (0-19 years) who required a CVC between 2001 and 2016 at our health care center, which services patients from regional hospitals in a shared care model. Details on CVC insertions and daily records of catheter function while in hospital have been collected prospectively and stored in a dedicated database. Patient demographics, catheter characteristics, and complications were abstracted from the database. Complications were defined through clinician documentation of CVC mechanical failures such as disconnect, leakage, fracture, and blockage. Complication rates were expressed per 1,000 line days. Results A total of 8,747 CVCs were placed in 5,743 patients during the study period for a total of 780,448 line days. Neonatal patients required the most CVC insertions and made up 41% of the cohort studied. Total mechanical complication rates were the highest over the 15-year period in 2001 (12 per 1,000 line days) and lowest in 2013 (3.8 per 1,000 line days). Peripherally inserted central catheters were used in the majority of patients (56%), while port-a-caths made up the vast majority of line days (78%). Mechanical complications occurred more frequently in non-tunneled catheters and were least likely to occur in port-a-caths (43 and 3.1 per 1,000 line days, respectively). Tunneled catheters failed mechanically at a rate of 8.0 per 1,000 line days and the peripherally inserted central catheter complication rate was 17 per 1,000 line days. Conclusion We provide a novel description of the incidence of mechanical complications in the setting of commonly used CVCs in a large paediatric cohort. Our findings help convey the true frequency of mechanical failures and create a benchmark for mechanical CVC complications in children. Recognizing the mechanical limitations of indwelling catheters will assist clinicians in optimizing catheter choice. Future study is planned to identify risk factors associated with CVC complications.