EMT · Secondary Assessment · 5 min read · Open lesson
Focused History: Chief Complaint, OPQRST and SAMPLE
- Distinguish between the chief complaint, the history of present illness, and the baseline medical history obtained through structured questioning.
- Apply the OPQRST mnemonic to evaluate pain, discomfort, and symptom progression while identifying and documenting pertinent negatives.
- Utilize the SAMPLE framework and adapt interviewing strategies for responsive, unresponsive, pediatric, and geriatric patients.
The Chief Complaint and Questioning Techniques
In emergency medical care, clarifying the chief complaint helps guide further assessment, whereas the primary assessment focuses on identifying and managing immediate life threats. The chief complaint represents the primary reason EMS was called, and it should ideally be documented in the patient's own words. Expanding upon this initial statement, the EMT explores the history of present illness, which details the chronological progression of the patient's current problem. A focused history thoroughly explores the chief complaint, associated symptoms, and relevant medical history while the provider remains alert for other serious concerns.
Gathering this history requires intentional communication and effective questioning techniques. Open-ended questions allow the patient to describe their symptoms in detail without bias. For everyday communication, starting with an open inquiry gives the patient freedom to share what they feel in their own terms. However, closed-ended or direct questions become useful when eliciting specific information or when the patient is in severe respiratory distress and cannot manage full sentences. At all times, EMTs should avoid asking leading questions that suggest specific answers or symptoms to the patient, as leading phrasing can distort the clinical picture.
As the patient describes their condition, the EMT must also actively identify and record pertinent negatives. Pertinent negatives are relevant signs or symptoms that the patient denies experiencing, which help narrow possible causes without ruling out any condition on their own. Documenting pertinent negatives is an essential component of clinical history and accurate EMS reporting, providing hospital providers with clear evidence of what was assessed during the emergency call.
Evaluating Symptoms with the OPQRST Framework
The mnemonic OPQRST is a structured tool used to evaluate a patient's chief complaint and associated pain or discomfort. The 'O' stands for onset, which assesses what the patient was doing when the symptom began. Onset can be classified as sudden or gradual, providing clues to the underlying pathophysiologic process. A sudden onset of severe pain or distress can signal a time-critical emergency, but onset alone does not establish the cause. Similarly, a gradual onset can occur with infection or worsening chronic illness, but it does not rule out an emergency.
The 'P' stands for provocation and palliation, which identifies factors that make the symptom worse or better. Provocation questions investigate whether movement, pressure, exertion, or body position changes the symptom intensity. For instance, pain that worsens with breathing is described as pleuritic, whereas pain reproduced by chest wall movement or palpation may suggest a musculoskeletal source, though neither finding establishes a diagnosis. The 'Q' stands for quality, which asks the patient to describe the character or sensation of the pain. Common descriptors of pain quality include sharp, dull, aching, crushing, burning, and tearing. Visceral pain is often dull and poorly localized, but its characteristics vary and cannot reliably identify its source on their own.
The remaining letters evaluate location, intensity, and duration. The 'R' stands for region and radiation, which determines the anatomic location of the symptom and where it travels. Radiation means pain spreads from its initial location to another area of the body, whereas referred pain is perceived at a location distinct from the actual site of the pathology. The 'S' stands for severity, which measures the subjective intensity of the symptom and is typically quantified using a numeric rating scale from 0 to 10, where 0 is no pain and 10 is the worst pain imaginable. Finally, 'T' stands for time, determining when the symptom began and how it has changed over time. Time inquiries clarify whether the symptom is continuous, intermittent, or progressively worsening.
Obtaining a Baseline Medical History with SAMPLE
The mnemonic SAMPLE is a standard framework used to obtain a comprehensive baseline medical history. In SAMPLE, the 'S' stands for signs and symptoms related to the current episode. A sign is an objective physical finding that can be observed or measured by the EMT, such as cyanosis or tachycardia. Conversely, a symptom is a subjective sensation or condition described directly by the patient, such as nausea or lightheadedness. Both signs and symptoms work together to paint an accurate clinical picture.
The 'A' in SAMPLE stands for allergies, including adverse reactions to medications, foods, environmental substances, and latex. When identifying an allergy, the EMT must ask what specific physical reaction occurs upon exposure. The 'M' stands for medications, which encompasses prescription drugs, over-the-counter products, and herbal supplements. EMTs should assess medication compliance, confirming whether the patient takes medications as prescribed. Additionally, before assisting with a patient's prescribed nitroglycerin, EMTs should ask about recent use of erectile dysfunction medications and follow local protocol and medical direction.
The final three letters capture past context and recent events. The 'P' stands for pertinent past medical history, encompassing existing chronic illnesses and prior surgical procedures, which helps identify whether the current presentation is an acute exacerbation of a known disease. The 'L' stands for last oral intake, including the timing and nature of recent food and fluid consumption; this provides vital information for emergency department staff if the patient requires emergency surgery or anesthesia. Lastly, the 'E' stands for events leading up to the illness or injury, capturing the immediate sequence of occurrences and identifying potential triggers such as physical exertion, emotional stress, or toxic exposure.
| Assessment Element | Definition | Clinical Identification | Verified Examples |
|---|---|---|---|
| Sign | Objective physical finding | Observed, heard, felt, or measured by the EMT | Cyanosis, tachycardia |
| Symptom | Subjective sensation or condition | Described directly by the patient experiencing it | Nausea, lightheadedness |
Adapting History Gathering Across Patient Presentations
The sequence of assessment depends heavily on the patient's condition. In a responsive medical patient, obtaining the focused history typically precedes the focused physical examination. For an unresponsive medical patient, the EMT must prioritize the assessment and treatment of immediate life threats while gathering available history from bystanders as soon as practical. When working with unresponsive medical patients, EMTs should inspect the scene and the patient for medical alert jewelry, cards, or pill bottles to uncover vital medical background.
When the patient cannot communicate, secondary sources become essential. Family members, caregivers, and bystanders serve as secondary sources of history. For example, assessing a patient's baseline mental status from family helps determine whether altered mentation is acute or chronic. Furthermore, medical events can lead directly to trauma; a patient who experiences a syncopal episode preceding a fall requires a medical history assessment in addition to a trauma evaluation to identify why the fall occurred.
Different age groups also require specific adaptations during history taking. When evaluating pediatric patients, EMTs should gather history from both the child and the parent or caregiver to obtain a complete perspective. Geriatric patients frequently present with atypical symptoms, making detailed timeline questioning and establishing their baseline status essential for recognizing deviations from their normal health.
Common mistakes
- Assuming that a gradual symptom onset rules out an emergency, or conversely assuming that a sudden onset definitively identifies the underlying cause.
- Treating a fall as an isolated trauma incident without obtaining a medical history when a syncopal episode preceded the event.
- Asking leading questions that suggest specific answers or symptoms to the patient instead of allowing them to describe their condition through open-ended questions.
- Failing to document pertinent negatives, which are essential for narrowing possible causes and ensuring comprehensive EMS reporting.
Summary
- The chief complaint is the primary reason EMS was called, ideally documented in the patient's own words, while the history of present illness details its chronological progression.
- Open-ended questions minimize bias, closed-ended questions assist with specific facts or severe respiratory distress, and leading questions should always be avoided.
- OPQRST guides symptom evaluation: onset (sudden or gradual), provocation/palliation, quality, region/radiation (including referred pain), severity (0 to 10 scale), and time (continuous, intermittent, or worsening).
- SAMPLE establishes baseline history: signs and symptoms, allergies (including specific physical reactions), medications (including compliance and screening for erectile dysfunction drugs before assisting with nitroglycerin under medical direction), pertinent past medical history, last oral intake, and preceding events.
- Pertinent negatives are relevant symptoms the patient denies, which help narrow down causes without ruling them out entirely.
- Responsive medical patients receive a focused history before a focused physical exam, whereas unresponsive patients require immediate life-threat management while EMTs gather history from bystanders, scene clues, cards, or medical alert jewelry.
- Special assessment considerations include evaluating both medical and trauma factors in syncope-related falls, gathering pediatric history from both child and caregiver, and assessing baseline mental status in geriatric patients who present with atypical symptoms.
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