pH, PaCO₂, HCO₃⁻; Winter formula; optional anion gap.

Critical Care · Updated 4/19/2026

Calculates alveolar oxygen tension and A-a gradient from atmospheric pressure, FiO2, PaCO2, and PaO2, with age-adjusted expected gradient.

Respiratory · Updated 4/19/2026

Calculates AHI from apnea-hypopnea events and total sleep hours with adult/pediatric severity bands.

Sleep Medicine · Updated 4/19/2026

Rough reference FEV1 from age and height; use GLI reference equations for lung function reporting.

Pulmonary Function · Updated 4/19/2026

Simplified spirometry interpretation using FEV1/FVC ratio and bronchodilator response (and optional FVC% predicted for restrictive pattern).

Pulmonary Function · Updated 4/19/2026

Modified Asthma Predictive Index: requires recurrent wheeze (>=4/year) plus >=1 major or >=2 minor criteria.

Respiratory · Updated 4/19/2026

PASS: wheezing + work of breathing + expiration prolongation (0–6).

Respiratory · Updated 4/19/2026

RDI = (apneas + hypopneas + RERAs) / sleep hours.

Polysomnography Calculators · Updated 4/19/2026

Bateman-type exacerbations risk score from BMI, ACQ-5, FEV1, reliever use, and high-step therapy.

Respiratory Calculators · Updated 4/19/2026

Kendig-inspired pediatric LRTI CXR + clinical tier score (educational).

Respiratory Calculators · Updated 4/19/2026

Predicted 6MWD from height, weight, age, and sex using Enright reference equations; reports % predicted from observed distance.

Pulmonary Function · Updated 4/19/2026

GLI-2012 z-scores and % predicted for FEV1, FVC, FEV1/FVC from sex, height, DOB, reference date, ethnicity. Vendored Automate-Medical gli2012 (FEF/FEV0.75 not in bundle). Not affiliated with pedz.de.

Pulmonary Function · Updated 4/19/2026

Eight-item STOP-BANG questionnaire to estimate risk of obstructive sleep apnea in adults.

Sleep Medicine · Updated 4/19/2026