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Hemodialysis catheter care strategies: a cluster-randomized quality improvement initiative
Alex Rosenblum1, Weiling Wang1, Lynda K Ball1
1Fresenius Medical Care, North America, Waltham, MA.
Insights
Implementing new central venous catheter (CVC) care protocols significantly reduced bloodstream infections (BSIs) and antibiotic use in hemodialysis patients. This quality improvement initiative demonstrated sustained reductions in BSIs and sepsis-related hospitalizations.
Area of Science:
- Infectious Diseases
- Nephrology
- Quality Improvement
Background:
- Central venous catheters (CVCs) are widely used in hemodialysis, but are associated with a high risk of bloodstream infections (BSIs) despite existing protocols.
- Improving CVC care is crucial for reducing patient morbidity and healthcare costs.
Purpose of the Study:
- To evaluate the effectiveness of a quality improvement initiative using enhanced CVC care procedures to reduce BSIs in hemodialysis patients.
- To assess the impact of the intervention on antibiotic use and sepsis-related hospitalizations.
Main Methods:
- A stratified, cluster-randomized quality improvement initiative was conducted across 211 paired dialysis facilities.
- The intervention involved using 2% chlorhexidine with 70% alcohol for exit-site care and 70% alcohol for "scrub the hubs" compared to usual care.
- Blood cultures and antibiotic starts were monitored during baseline and follow-up periods, with extended follow-up to assess sustained effects.
Main Results:
- The intervention group showed a statistically significant reduction in BSI rates (0.81 vs. 1.04 per 1,000 CVC-days) and intravenous antibiotic starts (2.53 vs. 3.15 per 1,000 CVC-days).
- Sustained reductions in bacteremia rates (41% decrease) and sepsis-related hospitalizations (approximately 27% difference) were observed during extended follow-up.
- The implemented protocol, aligned with CDC recommendations, led to approximately 20% lower rates of BSIs and antibiotic starts.
Conclusions:
- Adoption of the enhanced CVC care procedure effectively reduced BSIs and associated antibiotic use in hemodialysis patients.
- The observed reductions were sustained over time and correlated with a lower incidence of sepsis-related hospitalizations.
- Limitations include potential underestimation of sepsis hospitalizations and possible intervention crossover in control facilities.
Background:
The prevalence of central venous catheters (CVCs) for hemodialysis remains high and, despite infection-control protocols, predisposes to bloodstream infections (BSIs).
Study Design:
Stratified, cluster-randomized, quality improvement initiative.
Setting & Participants:
All in-center patients with a CVC within 211 facility pairs matched by region, facility size, and rate of positive blood cultures (January to March 2011) at Fresenius Medical Care, North America.
Quality Improvement Plan:
Incorporate the use of 2% chlorhexidine with 70% alcohol swab sticks for exit-site care and 70% alcohol pads to perform "scrub the hubs" in dialysis-related CVC care procedures compared to usual care.
Outcome:
The primary outcome was positive blood cultures for estimating BSI rates.
Measurements:
Comparison of 3-month baseline period from April 1 to June 30 and follow-up period from August 1 to October 30, 2011.
Results:
Baseline BSI rates were similar (0.85 vs 0.86/1,000 CVC-days), but follow-up rates differed at 0.81/1,000 CVC-days in intervention facilities versus 1.04/1,000 CVC-days in controls (P = 0.02). Intravenous antibiotic starts during the follow-up period also were lower, at 2.53/1,000 CVC-days versus 3.15/1,000 CVC-days in controls (P < 0.001). Cluster-adjusted Poisson regression confirmed 21%-22% reductions in both (P < 0.001). Extended follow-up for 3 successive quarters demonstrated a sustained reduction of bacteremia rates for patients in intervention facilities, at 0.50/1,000 CVC-days (41% reduction; P < 0.001). Hospitalizations due to sepsis during 1-year extended follow-up were 0.19/1,000 CVC-days (0.069/CVC-year) versus 0.26/1,000 CVC-days (0.095/CVC-year) in controls (∼27% difference; P < 0.05).
Limitations:
Inability to capture results from blood cultures sent to external laboratories, underestimation of sepsis-specific hospitalizations, and potential crossover adoption of the intervention protocol in control facilities.
Conclusions:
Adoption of the new catheter care procedure (consistent with Centers for Disease Control and Prevention recommendations) resulted in a 20% lower rate of BSIs and intravenous antibiotic starts, which were sustained over time and associated with a lower rate of hospitalizations due to sepsis.
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