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Table 1 Detailed performances of the BLUE-protocol

From: Lung ultrasound in the critically ill

Mechanism of dyspnea Profiles of BLUE-protocol Sensitivity Specificity Positive predictive value Negative predictive value
Acute hemodynamic pulmonary edema B-profile 97% 95% 87% 99%
   (62/64) (187/196) (62/71) (187/189)
COPD in exacerbation or severe acute asthma Nude profile 89% 97% 93% 95%
   (74/83) (172/177) (74/79) (172/181)
Pulmonary embolism A-profile (with deep venous thrombosis) 81% 99% 94% 98%
   (17/21) (238/239) (17/18) (238/242)
Pneumothorax A’-profile (with lung point) 88% 100% 100% 99%
   (8/9) (251/251) (8/8) (251/252)
Pneumonia B’-profile 11% 100% 100% 70%
   (9/83) (177/177) (9/9) (177/251)
  A/B profile 14.5% 100% 100% 71.5%
   (12/83) (177/177) (12/12) (177/248)
  C-profile 21.5% 99% 90% 73%
   (18/83) (175/177) (18/20) (175/240)
  A-V-PLAPS profile 42% 96% 83% 78%
   (35/83) (170/177) (35/42) (170/218)
  The four profiles 89% 94% 88% 95%
   (74/83) (167/177) (74/84) (167/176)
  1. Number of patients are shown in parentheses.