title: [Predication of volume responsiveness by brachial artery velocity change during passive leg raising].
abstract: OBJECTIVE
  To evaluate whether or not brachial artery peak velocity (Vpeak-BA) induced by passive leg raising (PLR) may predict volume responsiveness.
  
  
  METHODS
  We prospectively studied 29 patients enrolled into our intensive care unit (ICU) with spontaneous breathing during mechanical ventilation. Through echocardiography we compared the changes of brachial artery peak velocity induced by passive leg raising (ΔVBA-PLR) and the changes of left ventricle outflow tract velocity-time integral after volume expansion (ΔVTI-VE). Also the sensitivity and specificity of ΔVpeak-BA were determined in predicting volume responsiveness.
  
  
  RESULTS
  Among them, 15 responded to volume expansion and the rest 14 did not. ΔVBA-PLR and ΔVTI-VE were mutually correlated (R(2) = 0.378, P = 0.011). The sensitivity and specificity of ΔVpeak-BA ≥ 16% to predict volume responsiveness were 73% and 87% respectively.
  
  
  CONCLUSIONS
  Brachial artery peak velocity induced by passive leg raising is a reliable indicator of predicting volume responsiveness in patients with spontaneous breathing.
authors.affiliation: Department of Critical Care Medicine, Peking Union Medical College Hospital, Beijing, China.
authors.forename: Hong-min
authors.initials: HM
authors.lastname: Zhang
authors.forename: Da-wei
authors.initials: DW
authors.lastname: Liu
authors.forename: Xiao-ting
authors.initials: XT
authors.lastname: Wang
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhang
authors.forename: Ye
authors.initials: Y
authors.lastname: Liu
authors.forename: Yun
authors.initials: Y
authors.lastname: Long
authors.forename: Wen-zhao
authors.initials: WZ
authors.lastname: Chai
authors.forename: Xiang
authors.initials: X
authors.lastname: Zhou
authors.forename: Xi
authors.initials: X
authors.lastname: Rui
mesh_terms: D000328:Adult; D000368:Aged; D001783:Blood Flow Velocity; D001916:Brachial Artery / Q000503:physiopathology*; D005260:Female; D006801:Humans; D007362:Intensive Care Units; D007866:Leg / Q000098:blood supply; D008176:Lung Volume Measurements; D008297:Male; D008875:Middle Aged