Airway. Breathing. Circulation. Then What?
Nursing students are taught from the first semester that when determining priorities, you start with the ABCs: airway, breathing, and circulation.
And this is true. When a patient has an immediate threat to their airway, breathing, or circulation, that problem takes priority.
But what happens when there isn't a clear ABC emergency?
What happens when several patients have abnormal findings? When a respiratory finding is abnormal but expected for that patient's condition? When another patient has a new neurological change, a worsening trend, or an unexpected response to treatment?
These are the situations that make prioritization more difficult, whether you are answering a question on an exam or deciding which patient needs your attention first in clinical practice.
The ABCs are an important prioritization framework, but they are not a substitute for clinical judgment. Before you can decide what should happen first, you have to recognize what is abnormal, determine what is dangerous, and consider what could happen if you wait.
ABCs help you prioritize. Clinical judgment helps you determine what actually needs to be prioritized.
Start With the Patient
One of the easiest mistakes to make is jumping straight to the ABCs before you have interpreted the clinical situation.
You see an oxygen saturation, respiratory rate, blood pressure, or heart rate and immediately begin trying to place the finding into an ABC category.
But prioritization should not begin with: “Which finding involves airway, breathing, or circulation?”
It should begin with: “What is happening with this patient?”
Before ranking problems, look at the clinical picture.
Ask:
What findings are abnormal?
Which findings are expected for this patient's condition?
What is new or different from baseline?
Is anything worsening?
Is the patient responding as expected to treatment?
Which finding could indicate that the patient is beginning to deteriorate?
Once you understand what the findings mean, your priority frameworks become much more useful.
Abnormal Does Not Always Mean Priority
A patient can have an abnormal finding without that finding representing the most urgent problem. This is especially important when caring for patients with chronic conditions.
Imagine a patient with COPD has an oxygen saturation of 91% on their usual oxygen support. The value catches your attention because it is outside the range you may typically expect in a healthy adult.
Now imagine another patient who was alert and oriented 30 minutes ago but is suddenly difficult to arouse. If you simply search for the answer that fits the ABCs, you might focus immediately on the oxygen saturation because it involves breathing.
But prioritization requires context.
The first patient's oxygen saturation may be consistent with their baseline and current treatment plan. The second patient has experienced a new and significant change in neurological status.
That change could indicate hypoxia, medication effects, hypoglycemia, hemorrhage, stroke, or another rapidly developing complication.
The important question is “Which finding is unexpected, dangerous, or suggests that the patient's condition is changing?”
A new change from baseline can be one of the most important clues that a patient needs immediate attention.
Look at Trends, Not Just Individual Numbers
Clinical deterioration does not always appear as one dramatic finding. Sometimes the warning is in the trend.
A blood pressure of 94/58 might not immediately tell you what is happening. But what if the patient's blood pressure has been: 128/76 → 112/68 → 102/62 → 94/58
Now you have more information. The question is no longer simply whether 94/58 is abnormal.
The question becomes “Why is this patient's blood pressure continuing to fall?”
The same principle applies to:
Oxygen saturation
Respiratory rate
Heart rate
Level of consciousness
Urine output
Laboratory values
Pain
Response to treatment
A single finding gives you a snapshot. A trend tells you where the patient may be headed. And sometimes that direction is what determines your priority.
Think About Potential Harm
When several findings seem important, consider what could happen if you delay intervention.
Ask “What happens if I wait?”
If you do not address this finding now, could the patient lose their airway?
Could their respiratory status deteriorate?
Could they progress toward shock?
Could a neurological change become permanent?
Could an infection progress to sepsis?
Could the patient fall or experience another serious injury?
This shifts your thinking from simply identifying abnormal findings to evaluating risk. The priority is not always the finding that looks the most dramatic on paper. It is often the finding with the greatest potential to cause harm if it is not recognized and addressed.
A Better Way to Approach Priority Questions and Patient Care
When you are trying to determine what should happen first, work through the situation in this order:
1. Recognize the Cues
What findings stand out?
Start by identifying the important information you have been given or collected. This may include assessment findings, vital signs, laboratory results, medications, symptoms, or changes in the patient's condition.
Do not immediately decide which finding is the priority. First, make sure you understand the clinical picture.
2. What Is Abnormal?
Which findings are outside what you would expect?
Then go one step further.
Are they abnormal for this patient and this clinical situation?
Consider whether the finding is:
· New?
· Unexpected?
· Different from baseline?
· Worsening?
· Not responding to treatment?
An abnormal finding is important, but abnormal does not automatically mean it is the priority.
3. What Is Dangerous?
Which abnormal finding presents the greatest potential threat?
This is where your knowledge of disease processes, medications, laboratory values, complications, and patient safety becomes important.
Ask yourself:
· What happens if I wait?
· Could this patient deteriorate quickly?
· Which finding has the greatest potential to cause harm?
The goal is not simply to identify everything that is abnormal. It is to determine which abnormal finding matters most right now.
4. What Should Happen First?
What needs immediate nursing attention?
Once you have identified the greatest threat, determine the first nursing action.
Does the patient need an immediate assessment? An intervention? A medication held? Additional data? Provider notification? Escalation of care?
Your first action should address the most immediate threat while staying within the nurse's role and the information available.
5. What Keeps the Patient Safe?
What needs to happen after the first action?
Clinical judgment does not stop once you intervene.
You may need to:
· Reassess.
· Monitor the trend.
· Evaluate the patient's response.
· Review additional data.
· Escalate care if the patient is not improving.
You are no longer prioritizing because you memorized a rule.
You are prioritizing because you understand what is happening, what is dangerous, what needs to happen first, and what will keep the patient safe.
The Goal Is Not to Stop Using ABCs
The ABCs are not outdated, oversimplified, or something you eventually stop using. They remain one of the most important foundations of nursing prioritization.
What changes as your clinical judgment develops is how you use them. Instead of seeing a respiratory finding and automatically thinking breathing comes first, you begin asking:
· Is this finding expected?
· What has changed?
· Is the patient stable or deteriorating?
· Which finding represents the greatest threat?
· What happens if I wait?
That is the difference between memorizing a priority rule and actually prioritizing patient care.
Ready to Strengthen Your Clinical Judgment?
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The Clinical Judgment Lab was created to help nursing students move beyond memorizing nursing content and start practicing how to use it.
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