O'Toole, JAMA Surg 2021 - Effect of Intrawound Vancomycin Powder in Operatively Treated High-Risk Tibia Fractures: A Randomized Clinical Trial

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Effect of Intrawound Vancomycin Powder in Operatively Treated High-Risk Tibia Fractures: A Randomized Clinical Trial

Major Extremity Trauma Research Consortium (METRC), Zadnik, et al.·JAMA Surg·2021·112 citations·RCT

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Background

Despite the widespread use of systemic antibiotics to prevent infections in surgically treated patients with fracture, high rates of surgical site infection persist.

Purpose

To examine the effect of intrawound vancomycin powder in reducing deep surgical site infections.

Methods

Design, Setting, and Participants: This open-label randomized clinical trial enrolled adult patients with an operatively treated tibial plateau or pilon fracture who met the criteria for a high risk of infection from January 1, 2015, through June 30, 2017, with 12 months of follow-up (final follow-up assessments completed in April 2018) at 36 US trauma centers.

Interventions: A standard infection prevention protocol with (n = 481) or without (n = 499) 1000 mg of intrawound vancomycin powder.

Main Outcomes and Measures:

The primary outcome was a deep surgical site infection within 182 days of definitive fracture fixation.
A post hoc comparison assessed the treatment effect on gram-positive and gram-negative-only infections.
Other secondary outcomes included superficial surgical site infection, nonunion, and wound dehiscence.

Results

The analysis included 980 patients (mean [SD] age, 45.7 [13.7] years; 617 [63.0%] male) with 91% of the expected person-time of follow-up for the primary outcome.
Within 182 days, deep surgical site infection was observed in 29 of 481 patients in the treatment group and 46 of 499 patients in the control group.
The time-to-event estimated probability of deep infection by 182 days was 6.4% in the treatment group and 9.8% in the control group (risk difference, -3.4%; 95% CI, -6.9% to 0.1%; P = .06).
A post hoc analysis of the effect of treatment on gram-positive (risk difference, -3.7%; 95% CI, -6.7% to -0.8%; P = .02) and gram-negative-only (risk difference, 0.3%; 95% CI, -1.6% to 2.1%; P = .78) infections found that the effect of vancomycin powder was a result of its reduction in gram-positive infections.

Conclusions

Among patients with operatively treated tibial articular fractures at a high risk of infection, intrawound vancomycin powder at the time of definitive fracture fixation reduced the risk of a gram-positive deep surgical site infection, consistent with the activity of vancomycin.

Copyright remains with the authors and publisher.

Effect of Intrawound Vancomycin Powder in Operatively Treated High-Risk Tibia Fractures: A Randomized Clinical Trial.

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Effect of Intrawound Vancomycin Powder in Operatively Treated High-Risk Tibia Fractures: A Randomized Clinical Trial

Major Extremity Trauma Research Consortium (METRC), Zadnik, et al.·JAMA Surg·2021·112 citations·RCT

Free Full Text·DOI·PubMed

|

Background

Despite the widespread use of systemic antibiotics to prevent infections in surgically treated patients with fracture, high rates of surgical site infection persist.

Purpose

To examine the effect of intrawound vancomycin powder in reducing deep surgical site infections.

Methods

Design, Setting, and Participants: This open-label randomized clinical trial enrolled adult patients with an operatively treated tibial plateau or pilon fracture who met the criteria for a high risk of infection from January 1, 2015, through June 30, 2017, with 12 months of follow-up (final follow-up assessments completed in April 2018) at 36 US trauma centers.

Interventions: A standard infection prevention protocol with (n = 481) or without (n = 499) 1000 mg of intrawound vancomycin powder.

Main Outcomes and Measures:

The primary outcome was a deep surgical site infection within 182 days of definitive fracture fixation.
A post hoc comparison assessed the treatment effect on gram-positive and gram-negative-only infections.
Other secondary outcomes included superficial surgical site infection, nonunion, and wound dehiscence.

Results

The analysis included 980 patients (mean [SD] age, 45.7 [13.7] years; 617 [63.0%] male) with 91% of the expected person-time of follow-up for the primary outcome.
Within 182 days, deep surgical site infection was observed in 29 of 481 patients in the treatment group and 46 of 499 patients in the control group.
The time-to-event estimated probability of deep infection by 182 days was 6.4% in the treatment group and 9.8% in the control group (risk difference, -3.4%; 95% CI, -6.9% to 0.1%; P = .06).
A post hoc analysis of the effect of treatment on gram-positive (risk difference, -3.7%; 95% CI, -6.7% to -0.8%; P = .02) and gram-negative-only (risk difference, 0.3%; 95% CI, -1.6% to 2.1%; P = .78) infections found that the effect of vancomycin powder was a result of its reduction in gram-positive infections.

Conclusions

Among patients with operatively treated tibial articular fractures at a high risk of infection, intrawound vancomycin powder at the time of definitive fracture fixation reduced the risk of a gram-positive deep surgical site infection, consistent with the activity of vancomycin.

Copyright remains with the authors and publisher.

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