Obtain average tidal volume: Vt = Ve / f RSBI = f / Vt
RSBI ≤ 105 breaths/min/L has been widely accepted by healthcare professionals as a criteria for weaning to extubation. f: Respiratory Rate (breaths/min) Vt: Tidal Volume (Liters) Ve: Minute Volume (Liters)
Ve = 10 L f = 20 breaths/min Vt = Ve / f Vt = 10 L / 20 breaths/min Vt = 0.5 L RSBI = f / Vt RSBI = 20 breaths/min / 0.5 L RSBI = 40 breaths/min/L
Berg, Katherine M., MD, Gerald R. Lang, RRT, Justin D. Salciccioli, Eske Bak, Michael N. Cocchi, MD, and Shiva Gautam, PhD. The Rapid Shallow Breathing Index as a Predictor of Failure of Noninvasive Ventilation for Patients With Acute Respiratory Failure. Respiratory Care. N.p., 1 Oct. 2012. Web. 20 May 2016.