Patient History: SAMPLE, OPQRST, and Special Populations

Objective. Students will elicit a complete SAMPLE and OPQRST history from a standardized patient portraying at least three different chief complaints, adapting communication technique for pediatric, geriatric, and non-English-speaking patients.

Why Patient History Matters

In prehospital care, your hands and tools can reveal a lot, but a well-gathered history often leads you to the right field impression faster than any single physical finding. The two frameworks you will use every day are SAMPLE and OPQRST. Together they give you a structured, repeatable method that is recognized across EMS systems nationwide and that mirrors the documentation language medical-direction physicians expect.

The SAMPLE History

SAMPLE is an acronym covering six elements that apply to every patient regardless of chief complaint.

S – Signs and Symptoms: What is the patient experiencing right now? Symptoms are what the patient reports ("I feel nauseated"); signs are what you observe or measure (diaphoresis, a blood pressure reading).
A – Allergies: Ask specifically about medications, foods, latex, and environmental allergens. Always document "No known allergies" if that is the patient's answer — never leave this field blank. A missed allergy can cause a life-threatening medication error.
M – Medications: Obtain a complete list, including prescription drugs, over-the-counter medications, vitamins, herbal supplements, and recreational substances. Bring pill bottles to the hospital when possible.
P – Pertinent Past Medical History: Ask about prior diagnoses, surgeries, hospitalizations, and similar previous episodes.
L – Last Oral Intake: When did the patient last eat or drink, and what? Especially critical before potential surgical or airway interventions.
E – Events Leading Up: What was the patient doing when symptoms started? What has changed since?

OPQRST for Symptom Characterization

OPQRST drills deeper into the chief complaint — most often pain or discomfort, but applicable to any symptom.

O – Onset: When did it start? Was onset sudden or gradual?
P – Provocation / Palliation: What makes it worse? What makes it better? (Position, movement, medication, rest.)
Q – Quality: Ask the patient to describe the sensation in their own words before offering examples — "burning," "pressure," "tearing," "cramping."
R – Radiation / Region: Where exactly is it? Does it move anywhere (e.g., left arm, jaw, back)?
S – Severity: Use a 0–10 pain scale, anchored at each end. Reassess after any intervention.
T – Time / Temporal pattern: How long has this been going on? Is it constant or intermittent? Getting better, worse, or staying the same?

Questioning Technique

Begin with open-ended questions ("Tell me what you're feeling today") to let the patient describe symptoms in their own words without bias. Follow with closed-ended questions ("Does the pain go down your left arm?") to confirm or rule out specific findings. Avoid leading questions that suggest the answer you expect.

Adapting for Special Populations

Pediatric Patients

Children are not small adults. Before speaking with a child, use the Pediatric Assessment Triangle (PAT), sometimes called TICLS, to form a rapid across-the-room general impression covering Appearance (tone, interactability, consolability, look/gaze, speech/cry), Work of Breathing, and Circulation to Skin. This takes seconds and flags immediate life threats.

When taking a history from a child, speak directly to them using age-appropriate language while keeping the caregiver involved. For young children, the caregiver often provides most of the SAMPLE data. Avoid medical jargon. Ask about birth history and developmental milestones when relevant. Note that children may under-report pain or present atypically.

Geriatric Patients

Older adults frequently present with atypical findings — a myocardial infarction may cause only fatigue and mild nausea rather than classic chest pain. Perform a thorough polypharmacy review: many geriatric patients take five or more medications, and drug interactions or non-compliance are common contributors to EMS calls. Speak clearly, allow extra time for responses, and do not assume cognitive impairment. Rule out hearing or vision deficits that can mimic confusion.

Non-English-Speaking Patients

Communication barriers directly affect patient safety. Translation apps and bilingual bystanders can provide immediate assistance but carry real limitations: mistranslation of medical terms, lack of confidentiality, and bystander bias. Document which translation method was used. In most EMS systems, protocol requires requesting a professional medical interpreter — by phone or video — as soon as feasible. Never rely solely on a family member to interpret, especially for sensitive history (substance use, domestic violence, psychiatric history).

Safety Points

A missed allergy or medication can cause patient harm. Treat the Allergies and Medications elements as non-negotiable on every encounter.
Do not let a language barrier result in an incomplete allergy or medication history. Use your system's interpreter protocol promptly.
Reassess and document severity (OPQRST "S") after every intervention so trends are visible to the receiving team.
For pediatric patients, abnormal appearance on the PAT is an immediate red flag — address life threats before completing a full history.
When documenting, use the patient's own words in quotation marks for symptoms; do not paraphrase in ways that change clinical meaning.

Key terms8

SAMPLEA mnemonic for the six core history elements: Signs/Symptoms, Allergies, Medications, Pertinent past history, Last oral intake, and Events leading up to the emergency.

OPQRSTA mnemonic used to characterize a symptom in detail: Onset, Provocation/Palliation, Quality, Radiation/Region, Severity, and Time/Temporal pattern.

Open-ended questionA question that allows the patient to respond freely in their own words, without steering toward a specific answer (e.g., 'Tell me what brought you to call 911 today').

Closed-ended questionA question that prompts a specific, limited answer such as yes or no, used to confirm or rule out particular findings after open-ended questioning.

Pediatric Assessment Triangle (PAT)A rapid, visual assessment tool — also called TICLS — evaluating a child's Appearance, Work of Breathing, and Circulation to Skin to identify life threats before hands-on assessment.

PolypharmacyThe concurrent use of multiple medications by a single patient, commonly seen in geriatric patients and associated with increased risk of drug interactions and adverse effects.

Atypical presentationSigns and symptoms of a condition that differ from the classic or expected pattern, occurring more often in geriatric, pediatric, and diabetic patients (e.g., MI without chest pain).

Professional medical interpreterA trained interpreter — in person, by phone, or by video — who is qualified to accurately convey medical information between patient and provider while maintaining confidentiality.

In class: Role-play exercise: standardized patients present with chest pain, abdominal pain, and altered mental status; students practice SAMPLE and OPQRST questioning, using open-ended and closed-ended questions appropriately, while a partner scores on a structured rubric. · Special-populations workshop: students practice history-taking with a simulated pediatric patient using age-appropriate language and the TICLS (Tickles) pediatric assessment triangle, then with a simulated geriatric patient including polypharmacy medication review. · Language barrier drill using a translation app and a bilingual volunteer; students document the encounter, noting limitations of remote interpretation and protocol for requesting a professional interpreter.
Materials: Standardized patient scripts, SAMPLE/OPQRST reference cards, pediatric assessment triangle poster, medication sample bottles (props), translation app on tablet, history-taking rubric
Check: Student obtains all SAMPLE elements and relevant OPQRST data for each chief complaint; rubric score of 80% or higher required; no critical omissions (allergies, current medications) on any encounter.

Practice check8

Answer each question, then check it. Nothing is recorded; this is your own practice.