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Table 1 Criteria for the SBT process

From: Lung-thorax compliance measured during a spontaneous breathing trial is a good index of extubation failure in the surgical intensive care unit: a retrospective cohort study

Entry criteria

 SpO2

≥ 94% with FiO2 ≤ 0.5, PEEP ≤ 7 cmH2O, support of WOB ≤ 40%

 PaO2

≥ 70 mmHg

 Respiratory acidosis

No acidosis

 Heart rate

≤ 120 bpm

 Dopamine

≤ 5 mcg/kg/min

 Dobutamine

≤ 5 mcg/kg/min

 Noradrenaline

≤ 0.05 mcg/kg/min

 Hemoglobin

≥ 8 g/dl

 Electrolyte abnormality

No abnormality

Extubation criteria

 Consciousness

  Richmond Agitation-Sedation Scale

− 2 to 0

  Confusion assessment method for the ICU

Negative

 Respiration

  Respiratory rate

≤ 30/min

  RSBI

< 105

  Labored breathing

No

  Increased WOB

No

 Gas exchange

  SpO2

≥ 94%

  PaO2

≥ 70 mmHg

  pH

≥ 7.32

  PaCO2

≤ 45 mmHg

 Circulation

  Heart rate

≤ 120/min

  Systolic blood pressure

80 to 180 mmHg

  1. SBT spontaneous breathing trial, FiO2 inspired oxygen fraction, PEEP positive end-expiratory pressure, WOB work of breathing, SpO2 arterial oxygen saturation, PaO2 partial pressure of arterial oxygen, RSBI rapid shallow breathing index, PaCO2 partial pressure of arterial carbon dioxide