What is the clinical evidence from this study?

Study design: Meta-Analysis. Population: Cardiac implantable electronic device (CIED) infection (n=12283). Intervention: Antimicrobial pocket flush vs. No antimicrobial pocket flush. Primary outcome: CIED infection (RR 0.80, 95% CI 0.39-1.63, p=0.54).

What does this research mean for the field?

The use of an antimicrobial pocket flush during cardiac implantable electronic device (CIED) implantation provides no significant benefit in preventing CIED infections. Novelty: ClaimNovelty.SYNTHESIS. Consensus alignment: ConsensusAlignment.SUPPORTS_CONSENSUS.

What question did this study set out to answer?

To assess the effectiveness of antimicrobial pocket flush in preventing infections in cardiac implantable electronic devices (CIED).

June 3, 2026

Antimicrobial Pocket Flush and Cardiac Implantable Electronic Device Infection: Meta‐Analysis of Real‐World Studies

Key Result

Antimicrobial pocket flush did not significantly reduce CIED infection rates compared to no flush (0.8% vs. 1.1%; RR 0.80; 95% CI 0.39-1.63; p=0.54).

Key Points

To assess the effectiveness of antimicrobial pocket flush in preventing infections in cardiac implantable electronic devices (CIED).
Conducted systematic literature search for observational studies on antimicrobial pocket flush and CIED infections.
Performed random effects meta-analysis to estimate effectiveness based on study-level definitions of infection.
Conducted subgroup analysis by antimicrobial type: antiseptic vs. antibiotic.
Included seven studies with 12,283 patients; 61.5% involved antimicrobial pocket flush.
Overall infection rates varied from 0.5% to 1.5%, with no significant difference: 0.8% flush vs. 1.1% no flush, RR 0.80 (95% CI 0.39-1.63, p = 0.54).
Subgroup analysis showed no difference in infection rates between antiseptic and antibiotic use.

Study Design

Type

Meta-Analysis (n=12,283)

Structured PICO

Does antimicrobial pocket flush prevent CIED infection in patients undergoing CIED implantation?

Population

12,283 patients from seven observational studies undergoing CIED implantation or revision procedures.

Exposure

Antimicrobial pocket flush (antiseptic or antibiotic) before pocket closure.

Comparator

No antimicrobial pocket flush.

Outcome

CIED infection (based on study-level definitions).safety

Antimicrobial pocket flush during CIED implantation does not significantly reduce the risk of CIED infection compared to no flush, supporting current guidelines against its routine use.

Main Result

Relative Risk: 0.8 (95% CI 0.39–1.63)

Absolute Event Rate: 0.8% vs 1.1%

p-value: p=0.54

Limitations

Studies used various antimicrobials for pocket flush
Definitions of CIED infection varied

Abstract

INTRODUCTION: Clinical guidelines do not recommend the routine rinsing of cardiac implantable electronic devices (CIED) with antimicrobials before pocket closure("antimicrobial pocket flush.") However, despite current recommendations and a lack of evidence regarding the utility of this practice for reducing CIED infections, the antimicrobial pocket flush is still commonly employed. Clarifying the true value of this technique is important for supporting evidence-based practice and avoiding unnecessary antimicrobial use. Therefore, we performed meta-analysis of observational studies to determine the effectiveness of this practice in preventing CIED infections. METHODS: We performed a systematic literature search for observational human studies investigating the effectiveness of employing the antimicrobial pocket flush to prevent CIED infection. A random effects meta-analysis was performed. Effectiveness was estimated with the study-level definitions of CIED infection. We performed subgroup analysis by type of antimicrobial-antiseptic or antibiotic. RESULTS: A total of seven studies including 12,283 patients were analyzed. Over half of the CIED implantation procedures (61.5%) included the antimicrobial pocket flush, and between 8.4% and 85% of the implantations were revision procedures. Studies used various antimicrobials for pocket flush, and definitions of CIED infection varied. Overall infection rates ranged from 0.5%-1.5%. CIED infection rates did not differ significantly between procedures performed with versus without antimicrobial pocket flush (0.8% vs. 1.1%; relative risk 0.80; 95% confidence interval 0.39-1.63; p = 0.54). There was no difference in the subgroup analysis by antiseptic or antibiotic use. CONCLUSION: Our results suggest that the antimicrobial pocket flush provides no benefit in preventing CIED infection, reinforcing the current guidelines that do not support its routine use.

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