Antimicrobial-Stewardship Interventions in The Context of Antibiotic Prophylaxis in General Surgery: Evaluation of Procedures and Outcomes

The administration of antibiotics for the prevention of surgical site infections (SSIs) has long been a cornerstone of perioperative care. However, misuse and overuse of prophylactic antibiotics contribute to antimicrobial resistance, unnecessary adverse events, and increased healthcare expenditure. AMS initiatives in surgical settings aim to ensure that SAP is appropriately indicated, timed, selected, and discontinued, thereby improving patient outcomes and minimizing resistance^[1][2].

·        SSIs remain among the most common healthcare-associated infections, representing a heavy burden in terms of morbidity, mortality, and cost.

·        Optimizing SAP involves:

o   Correct indication for antibiotics.

o   Selection of appropriate agents.

o   Accurate timing and dosing.

o   Limiting duration of therapy.

·        Studies have documented poor compliance with accepted guidelines on SAP in terms of dosing, timing, and duration, driving the need for AMS interventions^[3][4].

A literature review of major AMS interventions from 2010 to 2024 was conducted, focusing on studies with outcomes in general surgery. Process and clinical quality indicators, antibiotic consumption, cost savings, and changes in rates of SSIs before and after interventions were extracted and analyzed to draw comprehensive conclusions.

Types of AMS Interventions in Surgical Prophylaxis

1. Guideline Development and Clinical Pathway Revision

·        Creation and implementation of hospital or national guidelines for SAP.

·        Integration of evidence-based algorithms into surgical workflows.

·        Routine revision of clinical pathways identified as outdated or non-compliant^[1][2][5].

2. Audit and Feedback

·        Internal audits measuring compliance with SAP protocols.

·        Real-time or periodic feedback to surgical, anesthesiology, and pharmacy teams.

3. Educational Campaigns

·        Targeted education for surgical staff regarding the risks of inappropriate SAP use and the principles of stewardship.

4. Pharmacy-Driven Interventions

Empowering pharmacy teams to review, adjust, or halt unnecessary antibiotic orders^[2]

Improvements in Appropriateness and Compliance

A 2018 quasi-experimental study involving 41,426 clean surgical procedures demonstrated significant improvements after AMS implementation:

Duration and Choice of Antibiotics

·        After optimizing 35 out of 171 clinical pathways, the median duration of SAP was reduced from 3 to 2 days.

·        Antibiotic discontinuation within 48 hours post-surgery improved from 62.4% to 81.8%.

·        The incidence of SSIs did not increase (5.7% pre-revision vs. 4.3% post-revision)^[1].

Drug Utilization and Economic Impact

•  Switch from broad-spectrum (e.g., ceftriaxone) to narrower-spectrum (e.g., cefazolin) antibiotics increased.
• Antibiotic consumption and associated costs decreased.
• Hospitals demonstrated economic and clinical benefit without compromising patient safety^[1][4]

Clinical and Economic Benefits

·        AMS programs result in more appropriate SAP, with significant reductions in antibiotic consumption, decreased rates of inappropriate prolonged prophylaxis, and cost-savings—even in resource-constrained settings^[1][4][5].

·        Multiple studies report no significant change—or a reduction—in SSI rates after stewardship interventions, dispelling fears that conservative SAP practices may compromise surgical outcomes^[1][2][3].

Barriers to Effective Implementation

·        Incomplete adherence to guidelines persists, often due to:

o   Entrenched prescribing habits.

o   Lack of real-time feedback.

o   Gaps in staff education.

·        Overlapping therapeutic and prophylactic indications may lead to redundant antibiotics, highlighting a need for better communication among clinical teams (e.g. concurrent treatment and prophylaxis during surgery)^[2].

Long-Term Strategies

·        Regular audit cycles, continuous education, and institutional support are required for sustained success.

·        Incorporating stewardship as a required element in surgical quality improvement projects leads to sustained improvements and improved awareness of antimicrobial resistance risks^[3].

Graphical Representation of AMS Outcomes in General Surgery

Figure 1: Improvements in Key SAP Compliance Indicators Following AMS Implementation

Prophylactic antibiotic use, timely administration, discontinuation, and appropriate selection all improved after intervention—a trend consistent among reviewed studies^[1][4]

AMS interventions in general surgery have shown measurable benefits in optimizing antibiotic use for surgical prophylaxis, reducing unnecessary exposures, improving patient safety, and generating health system savings. To maximize these benefits, a multifaceted stewardship approach—integrating guideline enforcement, ongoing education, regular auditing, and pharmacy oversight—should be implemented as standard of care in all surgical units.

Recommendations

·        Develop and regularly update SAP guidelines according to evolving evidence.

·        Institute real-time audit and feedback mechanisms.

·        Empower pharmacy and infection control teams for active stewardship.

·        Educate all perioperative staff on rational antibiotic use and the dangers of resistance.

·        Monitor clinical outcomes continuously to ensure patient safety is maintained.

Illustrative Table: Outcomes Before and After AMS in General Surgery

For visualization, bar graphs depicting these indicators can be presented for effective comprehension by surgical and stewardship teams.

1.      Ayasa, Fujibayashi, et al. "Antimicrobial stewardship intervention for the clinical pathways improves antimicrobial prophylaxis in surgical or non‐surgical invasive therapies." International Journal of Clinical Practice, 2018.

2.      Fiallo, Priscila, et al. "When Antimicrobial Treatment and Surgical Prophylaxis Collide: A Stewardship Opportunity." Hosp Pharm, 2024.

3.      Karbalaei, Mohsen, and Masoud Keikha. "Antimicrobial stewardship for surgeons; the urgent need for ... ." International Journal of Surgery, 2022.

4.      Liang, Y., et al. "Impact of the Antibiotic Stewardship Program on Prevention and Control of Surgical Site Infection during Peri-Operative Clean Surgery." Surgical Infections, 2018.

5.      Montuori, Elena, et al. "Impact of Antimicrobial Stewardship Interventions on Surgical Antibiotic Prophylaxis Appropriateness and Surgical Site Infections in an Italian Hospital." International Journal of Environmental Research and Public Health, 2020.