respiratory emergency-medicine
Altitude-Adjusted PERC Rule for PE
Modified Pulmonary Embolism Rule-out Criteria (PERC) adjusted for altitude. At high altitudes (>4000 ft/1220 m), physiological SpO₂ is lower, so the cut-off is adjusted from 95% to 90% to maintain specificity.
References
Related
Curated clinical cross-links plus same-class fallbacks.
Drugs
- Hydroxocobalamin (High-Dose — Cyanide Antidote) · Cyanide Antidote (Vitamin B12 Precursor at High Dose)
- Nitric Oxide (Inhaled — iNO) · Selective Pulmonary Vasodilator
- Selexipag · Pulmonary Arterial Hypertension
- Macitentan · Pulmonary Arterial Hypertension
- Thiamine (IV/IM — Pabrinex) · Vitamin B1 (Thiamine) — deficiency treatment / Wernicke's encephalopathy prevention
- Calcium chloride · IV calcium salt (high elemental calcium)
Pathways
- Acute Asthma in Adults · BTS/SIGN British Guideline on Asthma 2019; NICE NG80
- Pulmonary Embolism Assessment · NICE NG158; ESC 2019 PE Guidelines
- COPD Exacerbation Management · NICE NG115 / GOLD 2024
- Community-Acquired Pneumonia (CURB-65) · BTS 2009 / NICE NG138
- Acute Pulmonary Embolism · BTS 2003 / ESC 2019
- Pleural Effusion Assessment · BTS 2010
Decision support only — verify against MDCalc, NICE, or your local guideline before clinical use.