Name: Asthma / COPD exacerbation — bulletproof documentation — ER Toolkit
Creator: Kim Trinh, MD

The dangerous asthma/COPD patient is the one quietly tiring out. The defensible chart documents the severity, the response to escalating therapy, the trial of non-invasive ventilation before intubation, and — if the patient is tubed — that breath-stacking was anticipated and managed.

▸Critical pathway

Original, evidence-based synthesis — the critical diagnoses you cannot miss, the tests that catch them, and the interventions that can’t wait. Apply local protocol and judgment.

① Immediate

SpO₂, work-of-breathing assessment, and early continuous bronchodilators with steroids; consider ipratropium and magnesium for severe exacerbation.
For impending failure (silent chest, exhaustion, altered mentation): start NIV and prepare for intubation while continuing maximal medical therapy.

② Critical tests

SpO₂ and clinical severity; venous/arterial blood gas if failing
Chest X-ray when pneumothorax, pneumonia, or an alternative diagnosis is suspected
ECG and bedside ultrasound to separate cardiac from pulmonary causes

③ Can’t-miss → act

Impending respiratory failure

Trigger: Silent chest, exhaustion, rising CO₂, or altered mentation
Test: Clinical plus blood gas
Intervention: NIV early; intubation with a ventilator strategy allowing prolonged expiration

Pneumothorax

Trigger: Sudden worsening with unilateral findings
Test: Lung ultrasound or chest X-ray
Intervention: Decompression/chest tube for tension or large pneumothorax

Anaphylaxis

Trigger: Exposure with urticaria, angioedema, or hypotension
Test: Clinical
Intervention: Intramuscular epinephrine

Acute heart failure (cardiac wheeze)

Trigger: Orthopnea, crackles, elevated JVP
Test: ECG, BNP, lung ultrasound
Intervention: NIV, nitrates, diuresis

Pulmonary embolism

Trigger: Wheeze with pleuritic pain or hypoxia out of proportion
Test: Pretest probability then CTPA
Intervention: Anticoagulation

④ Disposition

Discharge after sustained response with a steroid course and inhaler plan; admit for hypoxia, persistent work of breathing, or a high-risk exacerbation, and to ICU for NIV or impending failure.

01What's at stake

A "normalizing" or rising CO₂ in a tiring asthmatic is ominous, not reassuring, and intubating a severe asthmatic is itself dangerous: dynamic hyperinflation and auto-PEEP cause hypotension and barotrauma/pneumothorax. NIV reduces intubation and mortality when started early — and recognizing NIV failure in time is what prevents a crash.

02Can't-miss & mimics

Impending respiratory failure — silent chest, exhaustion, altered mentation, a rising/normalizing CO₂.
Pneumothorax — sudden deterioration; in the intubated patient, suspect with hypotension (DOPE).
Mimics to exclude: acute heart failure (cardiac "asthma"), PE, anaphylaxis, pneumonia.

03Severity assessment

Work of breathing, accessory muscle use, ability to speak, mentation, SpO₂. → severity
Capnography/ABG: a normal or rising CO₂ in a working, tiring patient signals fatigue and impending failure. → escalate
Peak flow (asthma) trends with response.
Reassess after each round of therapy — the response drives disposition and the decision to escalate to NIV.

Skip the typing

Work the case in the Asthma / COPD Exacerbation Workup — it records the severity, oxygenation, peak flow/ABG, and the response to therapy, and assembles an MDM that documents the escalation and disposition.

04Management escalation

Asthma: continuous/repeated inhaled beta-agonist + ipratropium, early systemic corticosteroids, IV magnesium for severe cases; consider epinephrine (IM) in the crashing/near-arrest patient.
COPD: bronchodilators, systemic steroids, antibiotics when indicated.
NIV (BiPAP) early for hypercapnic/hypoxemic failure — reduces intubation; reassess at 1–2 hours (worsening pH/RR/mentation predicts failure → intubate).
The decision to intubate is clinical — no single ABG number mandates it.

05If intubated

Anticipate breath-stacking / auto-PEEP: low rate, long expiratory time, permissive hypercapnia; keep plateau pressure <30.
Sudden hypotension on the vent → DOPE: disconnect and manually bag, and rule out tension pneumothorax.
Adequate sedation; avoid combined steroid + prolonged paralytic where possible (myopathy).

06What to document

▼ weak

"Asthma exacerbation, gave a neb, satting ok, discharged."

▲ defensible

"Severe asthma exacerbation — accessory muscle use, speaking in short phrases; continuous albuterol/ipratropium, IV steroids and magnesium given. CHF, PE, anaphylaxis, and pneumonia considered. Capnography watched — no ominous CO₂ rise. Reassessed: marked improvement, peak flow up, normal mentation, sustained off continuous nebs. Discharged with steroid course, inhaler technique, and return precautions; or (if failing) BiPAP started with 1–2h reassessment and intubation readiness."

07Where charts fail

Reading a normalizing/rising CO₂ as reassuring in a tiring patient.
Not documenting the response to therapy before discharge.
Delaying NIV, or not recognizing NIV failure and escalating.
Not anticipating auto-PEEP/breath-stacking after intubating a severe asthmatic, or missing the post-intubation tension pneumothorax (DOPE).
Anchoring on "asthma/COPD" without considering CHF, PE, or anaphylaxis.

08Sources

DeGiorgi A, White M. Ventilator management: maximizing outcomes in caring for asthma, COPD, and pulmonary edema. Emergency Medicine Practice (EB Medicine). 2008;10(8).
Brochard L, Mancebo J, Wysocki M, et al. Noninvasive ventilation for acute exacerbations of COPD. N Engl J Med. 1995;333:817-822.
Global Initiative for Asthma (GINA). Global strategy for asthma management and prevention. GINA report. 2023.
Global Initiative for Chronic Obstructive Lung Disease (GOLD). Global strategy for prevention, diagnosis, and management of COPD. GOLD report. 2023.

Note: the EB source focuses on ventilatory/NIV management; the bronchodilator/steroid/magnesium escalation reflects current GINA/GOLD guidance — apply local protocol.

Asthma / COPD exacerbation: documentation that holds up