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Background:

Despite the availability of guidelines and official policies, antibiotic prophylaxis in clean surgery remains suboptimal.


Objective:

The aim of this study was to evaluate the clinical effects and cost-effectiveness of pharmacist-led intervention in the perioperative anti-infection prophylaxis of patients undergoing orthopedic internal fixation.


Methods:

We performed a retrospective analysis based on the medical records of internal fixation surgery in a tertiary hospital from July 2019 to June 2020. Data were divided into two groups based on whether a full-time pharmacist participated in the treatment. The research parameters included use of antibiotics, rationality of medication, postoperative complications, and related cost. To deal with selection bias, propensity score matching method was employed at a ratio of 1:1. Meanwhile, a cost-effectiveness analysis was used to evaluate the impact of pharmacist intervention on antibiotic prevention in internal fixation surgery.


Results:

A total of 537 participants were included in this study. After matching, 236 patients were comparable in each group. During the pharmacist intervention period, less pharmacologic prophylaxis (96.6% vs 100.0%, p = 0.007) and shorter prophylaxis duration (1.60 vs 2.28 days, p < 0.001) were observed. The reasonable rate increased dramatically in usage and dosage (96.6% vs 83.9%, p < 0.001), timing of administration (94.5% vs 78.4%, p < 0.001) and medication duration (64.4% vs 37.7%, p < 0.001). In addition, pharmacist intervention yielded net economic benefits. A remarkable reduction was observed in average length of stay (10.43 vs 11.14 days, p = 0.012), drug cost ($610.57 vs $706.60, p = 0.001) and defined daily doses (2.31 vs 3.27, p < 0.001). The cost-effectiveness ratios, divided drug cost savings by cost of pharmacist time, were 28:1 for drug and 2:1 for antibiotics, respectively.


Conclusion:

Pharmacist-driven antibiotic stewardship for orthopedic internal fixation patients improved compliance with peri-procedure antibiotic prophylaxis, and reduced the cost and utilization of antibiotics. This helped to bring significant clinical and economic benefits.


Keywords:

Antibiotic prophylaxis; Antimicrobial stewardship; Cost analysis; Medication appropriateness; Orthopedic internal fixation; Pharmacist intervention.

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Effect of pharmacist intervention on antibiotic prophylaxis in orthopedic internal fixation: A retrospective study

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