Spontaneous Breathing Trial
- RT Jaime
- Apr 6, 2022
- 1 min read
WHAT IS IT?
A Spontaneous Breathing Trial (SBT) is a type of breathing test done to see if a patient is ready for extubation.
HOW IT WORKS
- This mode of ventilation is testing the strength and ability of the patient to breath on his or her own with the least amount of support from the Ventilator.
- Mode on the vent is Tube Compensation or Automatic Tube Compensation set at 100%. This is a TRUE SBT.
- 30min - 1 hr should be sufficient enough time to determine the extubation readiness of the patient.
- A Post SBT ABG will show if the patient fell into a respiratory acidosis during the trial indicating they are NOT ready for extubation.
- Respiratory Mechanics values gathered at the end of the SBT include VC, NIF, RSBI, and cuff leak positive or negative.
- Patient should be following commands and be A&Ox3.
WARNING
The patient should meet some kind of SBT eligibility criteria set by your hospital. DO NOT SBT CRITICALLY ILL PATIENTS as per your hospital policy.






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