Nursing assessment: subjective and objective data, sources and frameworks
- Fundamental
Assessment is the first phase of the process: gathering and checking data about the person to know what they need.
What it is
Nursing assessment is the orderly collection of data about a person's health. It includes subjective data (symptoms, feelings and perceptions the person reports) and objective data (what is observed and measured: vital signs, examination findings, laboratory results). The primary source is the patient; secondary sources are the family, caregivers and the clinical record. Data come from the interview, observation and the physical examination (inspection, palpation, percussion and auscultation). Depending on the moment, it may be a primary survey, an admission assessment, an ongoing assessment, a focused assessment or a time-lapsed reassessment.
Key points
- The admission assessment is comprehensive and sets the baseline: history, examination and vital signs.
- A focused assessment re-evaluates a problem already identified, for example pain or breathing.
- In acute care, an ongoing head-to-toe assessment is done at least once per shift.
- A time-lapsed reassessment is used in long-term care when three months or more have passed since the last one.
- The family is key when the patient cannot communicate: infants, children, people with memory problems or patients unable to speak.
Components
- Interview: questions, active listening and attention to non-verbal cues and body language.
- Observation: appearance, behaviour and response to care.
- Physical examination: inspection, palpation, percussion and auscultation.
- Review of the clinical record, results and other professionals' reports.
- Frameworks to organise data: head to toe or by body system.
What it is for
- Provide the basis for the nursing diagnosis and the care plan.
- Detect changes and risks early.
- Learn the person's preferences, culture and resources.
Types of assessment
| Type | When it is done | Example |
|---|---|---|
| Primary survey | At every encounter | Level of consciousness, airway, breathing and circulation; emergency care if needed |
| Admission | On admission to the facility | Full history, head-to-toe examination and vital signs |
| Ongoing | At least once per shift in acute care | Head-to-toe check every shift after surgery |
| Focused | To re-evaluate a problem already identified | Reassessing breathing in a patient with shortness of breath |
| Time-lapsed | In long-term care, three months or more after the last one | Comparing the current condition with the earlier assessment |
In nursing practice
- Before recording a doubtful finding, validate it, for example by checking unclear chart data with the patient.
- Culture and generation shape communication: avoiding eye contact may be a sign of respect, not of depression.
- An unexpected finding or deterioration is reported at once to the nurse in charge.
Common mistakes
- Recording an inference as if it were data («depressed patient») without validating it.
- Interviewing without active listening, or ignoring non-verbal cues.
- Relying on a single finding without looking for the pattern.
- Not asking the family when the patient cannot answer.
Test yourself
Think of the answer, then tap the question to see it.
Is «the patient says the pain is 7 out of 10» subjective or objective data?
Subjective: the person reports it. A measured heart rate would be objective data.
What are the four techniques of the physical examination?
Inspection, palpation, percussion and auscultation.
What does the primary survey check?
Level of consciousness, airway, breathing and circulation, at every encounter, so that emergency care can start if needed.
What is the primary source of data in a nursing assessment?
The patient. Family, caregivers and the clinical record are secondary sources.
Elsewhere in DurgiPedia
Connections
Educational content for students; it does not replace your institution's protocols, supervised clinical training or a prescriber's order. Dose-calculation examples use made-up numbers: they are educational, not a clinical order.
Sources: Nursing Fundamentals (Open RN), 4.3 Assessment (Open RN, Chippewa Valley Technical College (LibreTexts), 2022); Nursing Fundamentals (Open RN), 4.2 Basic Concepts (Open RN, Chippewa Valley Technical College (LibreTexts), 2022).
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