Introduction
Previous work has utilized the National Burn Repository to examine deep venous thrombosis (DVT) after electrical injury. However, these studies were limited and could not examine when DVT occurs after electrical injury. In addition, the utility of risk assessment models for DVT risk stratification has not been examined in this patient population.
Methods
We performed a retrospective chart review of electrically injured patients at a single, ACS-verified burn center over a nine year period. Risk factors were identified and used to calculate Caprini scores at baseline and time of discharge. Outcomes of interest included symptomatic DVT or pulmonary embolus (PE) and time to DVT or PE.
Results
A total of 77 electrically injured patients were identified. DVT incidence was 6.5%. Patients with DVT had significantly higher TBSA (27.8% vs. 3.8%), mean number of operations (4.8 vs. 0.3), central venous catheter insertion (100% vs. 5.3%), ventilator days (16.2 vs. 0.3), ICU days (24.4 vs. 0.9), and mean change in Caprini score (18.6 vs. 1.3) during hospitalization. Baseline Caprini scores were low and DVT events occurred only after multiple risk factors were present; the average time-to-event was hospital day 17. Among patients with Caprini score >8, DVT incidence increased to 62%.
Conclusions
In our single center experience, the Caprini score was able to quantify DVT risk after electrical injury. In our series of 77 patients, the overall incidence of DVT was 6.5%. However, among patients whose Caprini score reached >8 during hospitalization, DVT incidence increased to 62%.