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Table 2 Ultrasonic variables of automatic speckle tracking and manual measurement between weaning-failure and weaning-success groups

From: Using automatic speckle tracking imaging to measure diaphragm excursion and predict the outcome of mechanical ventilation weaning

 

Weaning-success

N = 50

Weaning-failure

N = 38

p value

Automatic measurement

Mean excursion, cm

1.5 ± 0.8

1.1 ± 0.6

0.0163

Max excursion, cm

1.6 ± 0.9

1.2 ± 0.6

0.0143

Min excursion, cm

1.3 ± 0.8

1.0 ± 0.6

0.0270

Manual measurement

Excursion, cm

0.9 ± 0.4

0.9 ± 0.7

0.6681

Automatic measurement

Max velocity, cm/s

1.2 ± 0.7

1.0 ± 0.6

0.1837

Min velocity, cm/s

0.9 ± 0.7

0.8 ± 0.5

0.2747

Mean velocity, cm/s

1.0 ± 0.7

0.9 ± 0.5

0.2437

Manual measurement

Velocity, cm/s

1.4 ± 0.7

1.4 ± 0.8

0.8011

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Critical Care

ISSN: 1364-8535