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Management of CareAirway → Breathing → Circulation

Prioritization (ABCs)NCLEX cheat sheet

The ABCs (Airway, Breathing, Circulation) are the master framework for deciding which client or problem to address first.

18 key facts 3 practice questions Reviewed Oct 2026
The 1-minute sheetCinnaRN

Order

  • Airway first → obstruction = fatal
  • Breathing → SpO2, distress
  • Circulation → bleeding, perfusion

Next

  • D = Disability (neuro/LOC)
  • Then safety, then comfort

Rule

  • Acute/unstable before chronic
  • Actual problem before risk
  • Unexpected before expected

Watch

  • Sudden change → see first
  • Stridor/silent chest = emergency
Red flag to remember

Report-now and act first: stridor, choking, gurgling, or any sign of airway compromise.

Before you read

Test yourself first: 3 questions

Question 1 of 3

Which client should the nurse assess FIRST?

What is prioritization (abcs)?

A patent airway is always the highest priority because without it the client dies within minutes. Memory aid: Airway before Breathing before Circulation before Disability/everything else.

Priority pyramid Self-actual.EsteemLove / belongingSafety & securityPhysiologic (ABCs)
Answer "first" from the base up: physiologic/ABCs before safety before psychosocial.

Key points to remember

  • Airway problems (stridor, choking, obstruction, absent gag) come before breathing problems.
  • Breathing problems (low SpO2, respiratory distress, ineffective ventilation) come before circulation problems.
  • Circulation problems (bleeding, shock, no pulse, dysrhythmia) come before all non-life-threatening issues.
  • After ABCs, use 'D' for Disability/neuro and then Maslow and the nursing process to rank remaining problems.
  • Actual life-threatening problems outrank potential or chronic problems.
  • An unstable client or one with new/abnormal findings is seen before a stable client with expected findings.

Nursing priorities

  1. Assess and secure a patent airway first in any deteriorating client.
  2. Address oxygenation and effective breathing next, applying oxygen and positioning as needed.
  3. Control bleeding and support circulation and perfusion after airway and breathing.
  4. Reassess after each intervention to confirm the ABCs are stable before moving on.
  5. Rank multiple clients by who has the most immediate threat to airway, breathing, or circulation.

Labs & values

SpO2:95-100% (below 90% is hypoxemia, intervene)
PaO2:80-100 mmHg
PaCO2:35-45 mmHg
pH: 7.35-7.45
95100% Normal

Red flags: report now

  • Report-now and act first: stridor, choking, gurgling, or any sign of airway compromise.
  • Never address a lower-priority complaint (pain, comfort, teaching) while an airway, breathing, or circulation threat is unresolved.
  • Sudden drop in SpO2, absent pulse, or active hemorrhage requires immediate intervention, not documentation first.

References

Clinical references for this topic

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