Question special
Resident

The Injury severity score cut off was set at 15. It was also found that injury severity scores were associated with the primary outcome in cox analysis. It is therefore conceivable that more severely injured patients are at increased risk of PE and potentially may derive greater benefit from the filter than others. I note that the authors have suggested that in patients with ongoing contraindications to anticoagulation after 7 days, filter may be of benefit in the discussion.