Review Article

The Clinical Rationale for the Sentry Bioconvertible Inferior Vena Cava Filter for the Prevention of Pulmonary Embolism

Table 1

Postinjury incidence and time course of pulmonary embolism in trauma patients.

Author
(year)
Trauma populationPE incidence
n/N (%)
Postinjury time course of PEComments

Owings [18] (1997)Patients admitted to single level 1 university trauma center from 1990 to 199563/18,255 (0.3%)PEs occurred from days 1 to 30 following traumatic injury; one quarter of PEs occurred within first 4 days58 (92%) of the PE patients had at least one of the accepted risk factors for VTE

Sing [16] (2006)Retrospective chart review of trauma patients with PE 2001 to 2004 at four level 1 trauma centers146/25,658 (0.6%)Mean time to PE 7.9 ± 8.1 days, range 1 to 43 days; 24 PE occurred ≥15 days after injury, 16 (11%) ≥21 days (including 1 fatal)IVC filters not deployed in these patients; the authors argued that the duration of filter implantation should be individualized

Brakenridge [19] (2011)Patients admitted to single level 1 urban trauma center from 2003 to 2007108/17,736 (0.6%)25% within first 72 hours, 50% within first 4 days, 95% within 20 days; 6 cases diagnosed between 24 and 74 daysLong bone fractures independently predicted early PE (≤4 days, OR 2.8); severe head injuries associated with late PE (>4 days, OR 11.1)

Batty [20] (2012)Retrospective chart review of data collected prospectively July 2001 to July 2008 in Australian hospital trauma registry45/6344 (0.71%)Mean time to PE 12 days postinjury (range 0 to 48 days)Independent predictors of PE: absence of IVC filter, number of injuries to lower limb, central venous catheterization

Coleman [17] (2015)Retrospective chart review of trauma patients with PE 2007 to 2013 at three level 1 trauma centers133/54,964 (0.24%)Median time from admission to diagnosis of PE 4 hospital days (IQR 1–8), when 79 of PE occurred; 42.9% of PE diagnosed within first 3 days (early PE), 57.1% with late PELong bone fracture with extremity AIS score ≥3 significantly predicted early PE (p <0.05); severe brain injury, spinal cord injury, and blood transfusion ≤24 hours predicted late PE

Van Gent [21] (2017)Retrospective chart review of all adult patients who had ≥1 duplex ultrasound July 2006 through December 2011 at San Diego level 1 trauma center2370 qualifying patients — 265 (11.2%) developed VTE: 235 DVT only, 19 PE only, 11 both DVT and PE58 (25%) of all DVT occurred in the first day versus 1 (5%) of all PE; within 2 days of admission, 38% of DVT had occurred versus 26% of PEFor the 19 patients with PE only, all but one of the events were diagnosed within 43 days after admission; risk factors for PE and DVT after injury were different

AIS = Abbreviated Injury Scale; DVT = deep vein thrombosis; IQR = interquartile range; IVC = inferior vena cava; OR = odds ratio; PE = pulmonary embolism; VTE = venous thromboembolism