John Landry, BS, RRT

Calculate apnea-hypopnea index (AHI) using apnea and hypopnea events and sleep time to assess sleep apnea severity.

Calculate Silverman-Anderson score to assess newborn respiratory distress using chest movement, retractions, and grunting.

Calculate Apgar score using heart rate, breathing, muscle tone, reflexes, and color to assess newborn status after birth.

Calculate transpulmonary pressure (PL) using airway and pleural pressure values to assess lung-distending pressure during ventilation.

Calculate expiratory reserve volume (ERV) to assess extra air exhaled after normal breathing and support lung volume interpretation.

Calculate residual volume (RV) to assess the air remaining in the lungs after maximal exhalation and support lung volume interpretation.

Calculate FEF25–75% to assess mid-expiratory airflow and support spirometry interpretation in pulmonary function testing.

Calculate predicted peak expiratory flow (PEF) using age, height, and sex to assess expected airflow and pulmonary function.

Calculate the FEV1/FVC ratio to assess airflow obstruction and support spirometry interpretation in pulmonary function testing.

Calculate peak inspiratory flow (PIF) to assess ventilator flow delivery, inspiratory demand, and breath timing during respiratory care.

Calculate expiratory time (Te) using respiratory rate and I:E ratio to assess ventilator timing, exhalation, and air trapping risk.

Calculate inspiratory time (Ti) using respiratory rate and I:E ratio to assess ventilator timing and breath delivery.

Calculate the I:E ratio using inspiratory and expiratory time to assess ventilator timing and breathing pattern.

Calculate ventilator adjustments using current and target PaCO2 to estimate the minute ventilation needed for CO2 control.

Calculate corrected minute ventilation (VE) using PaCO2 values to assess ventilation changes and guide ventilator adjustments.

Calculate auto-PEEP to assess air trapping, incomplete exhalation, and ventilator mechanics during respiratory care.