Enter your tidal volume and respiratory rate into the calculator to determine your RSBI.

RSBI Calculation Formula

The following formula is used to calculate the RSBI from your tidal volume and respiratory rate.

RSBI = Respiratory Rate / (Tidal Volume / 1000)

Variables:

  • RSBI is the Rapid Shallow Breathing Index
  • Respiratory Rate is the number of breaths per minute
  • Tidal Volume is the volume of air displaced between normal inhalation and exhalation (ml)

To calculate the RSBI, divide the respiratory rate by the tidal volume in liters.

What is RSBI Calculation?

RSBI calculation refers to the process of determining the rapid shallow breathing index, which is a clinical tool used to predict the success of weaning patients from mechanical ventilation. This involves understanding the patient’s tidal volume and respiratory rate, which are critical parameters in assessing their readiness to breathe independently.

How to Calculate RSBI?

The following steps outline how to calculate the RSBI using the given formula.

  1. First, determine the tidal volume and respiratory rate.
  2. Next, convert the tidal volume from milliliters to liters by dividing by 1000.
  3. Use the formula: RSBI = Respiratory Rate / (Tidal Volume / 1000).
  4. Finally, calculate the RSBI by plugging in the values.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge.

Tidal Volume = 500 ml

Respiratory Rate = 20 breaths/min

FAQ

1. What is tidal volume?

Tidal volume is the amount of air that is inhaled or exhaled during normal breathing, measured in milliliters.

2. How is RSBI used in clinical settings?

RSBI is used to assess a patient’s ability to be weaned off mechanical ventilation. An RSBI less than 105 generally indicates a higher likelihood of successful weaning.

3. How often should RSBI be calculated?

RSBI should be calculated whenever assessing a patient for potential weaning from mechanical ventilation, especially during spontaneous breathing trials.

4. Can this calculator be used for different conditions?

Yes, the calculator can be used to evaluate RSBI in various clinical scenarios where mechanical ventilation weaning is considered.

5. Is the calculator accurate?

The calculator provides an estimate of the RSBI based on the inputs provided. For exact figures, it’s best to consult clinical guidelines and patient data.