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Prophylactic Antibiotics in Patients with Traumatic Pneumocephalus or Cerebrospinal Fluid Leak
Hsin-Ping Wang1, Rebecca J Reif2, Kyle J Kalkwarf1
1Department of Surgery, Division of Trauma and Acute Care Surgery, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
Insights
Prophylactic antibiotics do not appear to prevent central nervous system infections (CNSIs) in patients with traumatic pneumocephalus or cerebrospinal fluid leaks. Further research is needed to confirm these findings for these rare trauma complications.
Area of Science:
- Neurosurgery
- Infectious Disease Epidemiology
- Trauma Care
Background:
- Traumatic pneumocephalus (TP) and cerebrospinal fluid (CSF) leaks following trauma present a theoretical risk of central nervous system infection (CNSI).
- Current clinical practice often involves prophylactic antibiotics, yet evidence supporting this approach is limited.
- This study investigates the incidence of CNSI and the efficacy of antibiotic prophylaxis in patients with TP or basilar skull fracture with CSF leak (BSF-CSF).
Purpose of the Study:
- To determine the incidence of central nervous system infections (CNSIs) in patients with traumatic pneumocephalus (TP) or basilar skull fracture with CSF leak (BSF-CSF).
- To evaluate the effectiveness of prophylactic antibiotics in preventing CNSIs in this patient population.
- To analyze CNSI rates across different antibiotic regimens, including no antibiotics.
Main Methods:
- A retrospective cohort study analyzed data from a trauma registry between January 2014 and July 2020.
- Patients with traumatic pneumocephalus or basilar skull fracture with CSF leak were identified using ICD-9 and ICD-10 codes.
- Central nervous system infection rates were compared between patients receiving no antibiotics, defined prophylactic regimens, and other antibiotic regimens using ANOVA.
Main Results:
- A total of 365 patients met the inclusion criteria (360 with TP, 5 with BSF-CSF).
- The overall incidence of CNSI was low at 1.1% (4/365), with all cases occurring in patients with isolated traumatic pneumocephalus.
- No statistically significant difference in CNSI incidence was observed among patients who received antibiotics versus those who did not (p=0.958).
Conclusions:
- Traumatic pneumocephalus and basilar skull fracture with CSF leak are rare post-trauma diagnoses.
- The incidence of central nervous system infection is minimal, and prophylactic antibiotics do not demonstrate a significant protective effect.
- Larger clinical trials are warranted to definitively establish the role of antibiotic prophylaxis in preventing CNSIs for these uncommon conditions.
Introduction:
Pneumocephalus and cerebrospinal fluid (CSF) leaks are uncommon after trauma, but they expose the sterile CSF to environmental pathogens and create theoretical risk of central nervous system infection (CNSI). Prophylactic antibiotics are commonly given to these patients, but there is a paucity of evidence to guide this practice. We aim to quantify the incidences of these entities and analyze the efficacy of prophylactic antibiotics in preventing CNSIs.
Methods:
A retrospective cohort study was conducted using our institutional trauma registry. All patients admitted from January 2014 to July 2020 with traumatic pneumocephalus (TP) or basilar skull fracture with CSF leak (BSF-CSF) were included. ICD-9 and ICD-10 codes were used to identify CNSIs. CNSI rates among defined prophylactic antibiotic regimens, no antibiotics, and other antibiotic regimens were evaluated. ANOVA was used to analyze differences between the groups.
Results:
365 patients met inclusion criteria: 360 with TP; 5 with BSF-CSF. 1.1% (4/365) of patients developed CNSI, all with isolated traumatic pneumocephalus. 1.4% of patients (1/72) without antibiotics; 1.2% (3/249) receiving IV antibiotics outside of a defined regimen; and 1.1% (1/88) on a designated prophylactic regimen developed CNSIs. ANOVA indicated the incidence of CNSI was not significantly different among patients who received antibiotics or not, regardless of the regimen (p-value 0.958).
Conclusion:
TP and BSF-CSF are rare diagnoses among trauma patients. The rate of CNSI is marginal and antibiotics do not appear to confer a protective advantage. A larger trial is needed to elucidate the true effect of antibiotics on preventing CNSIs in patients with these uncommon diagnoses.
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