What RSBI predicts successful extubation?

RSBI (RR/TV) <105 breaths/min/L predicts successful extubation with 79% sensitivity; higher RSBI indicates rapid shallow breathing pattern; RSBI alone should not be the sole extubation criterion.

What SBT prerequisite criteria must be met?

SBT prerequisites: underlying cause improving, adequate oxygenation (PaO2/FiO2>150, SpO2>90%, PEEP≤8, FiO2≤0.5), hemodynamic stability (no new pressors, HR<140, stable BP), adequate cough, no excessive secretions, RASS ≥0 to -2.

How is the SBT conducted?

T-piece or low-level pressure support (PS 5-8 cmH2O ± PEEP 5 cmH2O) for 30-120 minutes; success criteria: RR 90%, HR 50-140 with <20% change, SBP 90-180, no distress signs (accessory muscle use, diaphoresis, agitation).

When should tracheostomy be considered in mechanical ventilation?

Tracheostomy is generally considered when weaning failure is likely after 7-10 days; benefits: patient comfort, reduced sedation, improved oral care, potential early decannulation; TRACMAN trial: timing 1-4 vs >10 days showed no mortality difference.

What post-extubation interventions reduce reintubation risk?

High-flow nasal oxygen (HFNO) reduces reintubation in low-risk patients; NIV is beneficial specifically in COPD and hypercapnic patients; NIV for high-risk patients (CHF, obesity, chronic respiratory failure) reduces extubation failure.

Ventilator Weaning Readiness and Spontaneous Breathing Trial

Assesses readiness for spontaneous breathing trial (SBT) using the RSBI (rapid shallow breathing index), P/F ratio, and weaning criteria checklist per ACCP evidence-based guidelines for ventilator liberation.

Weight

Height

Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.

How It Works

Each component has a specific meaning:

RSBI — The rsbi recorded for the patient or scenario being assessed.
P/F ratio — The p/f ratio recorded for the patient or scenario being assessed.
Weaning criteria checklist per ACCP evidence-based guidelines — The weaning criteria checklist per accp evidence-based guidelines recorded for the patient or scenario being assessed.

Note: Interpret the vent weaning sbt result against the clinical thresholds and context described above.

How to Use

Enter the RSBI, P/F ratio, weaning criteria checklist per ACCP evidence-based guidelines for the patient or scenario you are assessing. Assesses readiness for spontaneous breathing trial (SBT) using the RSBI (rapid shallow breathing index), P/F ratio, and weaning criteria checklist per ACCP evidence-based guidelines for ventilator liberation. Use the vent weaning sbt result to inform your clinical assessment.

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