The normal RSBI value is approximately which of the following?

The normal RSBI value is approximately which of the following?

• A. 100
• B. 105
• C. 110
• D. 95

Answer: (B)

RSBI, the Rapid Shallow Breathing Index, is calculated as respiratory rate divided by tidal volume in liters and reflects how efficiently a patient is breathing. A lower RSBI means slower, deeper breaths and generally better readiness for weaning, while a higher RSBI indicates rapid, shallow breathing and more work of breathing. In practice, around 105 is the commonly used threshold: RSBI near or below this value predicts a higher likelihood of successful extubation, whereas values around or above this point suggest increased risk. So the approximate normal value clinicians reference is 105.

RSBI, the Rapid Shallow Breathing Index, is calculated as respiratory rate divided by tidal volume in liters and reflects how efficiently a patient is breathing. A lower RSBI means slower, deeper breaths and generally better readiness for weaning, while a higher RSBI indicates rapid, shallow breathing and more work of breathing. In practice, around 105 is the commonly used threshold: RSBI near or below this value predicts a higher likelihood of successful extubation, whereas values around or above this point suggest increased risk. So the approximate normal value clinicians reference is 105.