TY  - JOUR
PY  - 2017//
TI  - Association of out-of-hospital hypotension depth and duration with traumatic brain injury mortality
JO  - Annals of emergency medicine
A1  - Spaite, Daniel W.
A1  - Hu, Chengcheng
A1  - Bobrow, Bentley J.
A1  - Chikani, Vatsal
A1  - Barnhart, Bruce
A1  - Gaither, Joshua B.
A1  - Denninghoff, Kurt R.
A1  - Adelson, P. David
A1  - Keim, Samuel M.
A1  - Viscusi, Chad
A1  - Mullins, Terry
A1  - Rice, Amber D.
A1  - Sherrill, Duane
SP  - 522
EP  - 530.e1
VL  - 70
IS  - 4
N2  - STUDY OBJECTIVE: Out-of-hospital hypotension has been associated with increased mortality in traumatic brain injury (TBI). The association of TBI mortality with the depth or duration of out-of-hospital hypotension is unknown. We evaluated the relationship between the depth and duration of out-of-hospital hypotension and mortality in major traumatic brain injury. <br><br>METHODS: We evaluated adults and older children with moderate or severe TBI in the preimplementation cohort of Arizona's statewide Excellence in Prehospital Injury Care study. We used logistic regression to determine the association between the depth-duration dose of hypotension (depth of systolic blood pressure <90 mm Hg integrated over duration [minutes] of hypotension) and odds of inhospital death, controlling for significant confounders. <br><br>RESULTS: There were 7,521 TBI cases included (70.6% male patients; median age 40 years [interquartile range 24 to 58]). Mortality was 7.8% (95% confidence interval [CI] 7.2% to 8.5%) among the 6,982 patients without hypotension (systolic blood pressure ≥90 mm Hg) and 33.4% (95% CI 29.4% to 37.6%) among the 539 hypotensive patients (systolic blood pressure <90 mm Hg). Mortality was higher with increased hypotension dose: 0.01 to 14.99 mm Hg-minutes 16.3%; 15 to 49.99 mm Hg-minutes 28.1%; 50 to 141.99 mm Hg-minutes 38.8%; and greater than or equal to 142 mm Hg-minutes 50.4%. Log2 (the logarithm in base 2) of hypotension dose was associated with TBI mortality (adjusted odds ratio 1.19 [95% CI 1.14 to 1.25] per 2-fold increase of dose). <br><br>CONCLUSION: In this study, the depth and duration of out-of-hospital hypotension were associated with increased TBI mortality. Assessments linking out-of-hospital blood pressure with TBI outcomes should consider both depth and duration of hypotension.<br><br>Copyright © 2017 American College of Emergency Physicians. Published by Elsevier Inc. All rights reserved.<p />  <p>Language: en</p>
LA  - en
SN  - 0196-0644
UR  - http://dx.doi.org/10.1016/j.annemergmed.2017.03.027
ID  - ref1
ER  -