Learning outcomes
After studying this lesson, the learner should be able to:
- Define clinical history and explain why history remains essential even when technology and laboratory tests are available.
- Distinguish comprehensive, focused, rapid, ongoing, interval, collateral, trauma, medical, surgical, medication, allergy, family, social, occupational, psychiatric, reproductive, functional and systems-review histories.
- Select the safest and most useful type of history for the patient’s complaint, acuity, age, communication ability and mechanism of injury.
- Use open, closed, clarifying, sequencing and safety-net questions without leading the patient.
- Assess the reliability of the source and obtain collateral information without compromising privacy or dignity.
- Recognise red-flag answers that require immediate escalation, treatment or urgent transport.
- Document a chronological, objective, confidential and clinically useful history.
1. Meaning of history taking
History taking is the systematic collection of information about a patient’s current problem, previous health, medicines, allergies, risks, social circumstances, function and the events leading to the call. It includes what the patient reports (subjective information), what relatives or witnesses report, and the context observed by the emergency team.
History is not simply asking, “What is wrong?” It is a purposeful conversation that tests possibilities, identifies threats, establishes a baseline and guides care. The EMT should continually combine the history with appearance, vital observations, physical examination and response to treatment.
2. Where history fits in emergency assessment
- Scene size-up: identify hazards, number of patients, mechanism, infection risks and available witnesses.
- Primary survey: assess responsiveness, airway, breathing, circulation, major bleeding and immediate disability; treat life threats as found.
- Immediate history: obtain only the facts needed to guide urgent action, such as onset, mechanism, allergies, medicines or an advance care plan.
- Secondary assessment: take a focused or comprehensive history and perform the relevant physical examination.
- Reassessment: repeat key questions and observations after treatment, deterioration, movement or a change in symptoms.
- Handover: communicate the history, findings, interventions, response and outstanding risks in a structured form.
The order is flexible. A conscious patient with stable vital signs may give a detailed history early. A shocked trauma patient may provide only a name and a few words while the team controls bleeding and arranges rapid transport.
3. Overview of the main types of history
| Type | Main purpose | When it is useful |
|---|---|---|
| Rapid or initial history | Find facts that change immediate life-saving care. | Unstable, unconscious, severely injured or rapidly deteriorating patients. |
| Comprehensive history | Build a broad picture of current and past health. | Stable patients, admission, chronic illness review or unclear complaints. |
| Focused history | Explore one presenting problem in depth. | Chest pain, breathlessness, abdominal pain, injury or another defined complaint. |
| History of present illness | Describe the current problem from onset to now. | Every acute complaint; usually chronological and symptom-specific. |
| Past medical history | Identify previous disease, admissions, complications and baseline health. | All patients, especially those with chronic illness or altered presentation. |
| Medication and allergy history | Find treatments, adherence, interactions and preventable risks. | All patients; urgent before medication decisions whenever possible. |
| Trauma and mechanism history | Explain energy transfer, injury pattern and hidden injury risk. | Road traffic crashes, falls, burns, assaults and penetrating injury. |
| Collateral history | Obtain information from another person when the patient cannot provide it. | Children, unconscious patients, delirium, dementia, language barriers or severe distress. |
| Social, occupational and environmental history | Identify exposures, support, function and barriers to safe discharge. | Poisoning, occupational injury, violence, chronic disease and recurrent emergencies. |
| Ongoing or interval history | Detect change after an earlier assessment or intervention. | Transport, observation, serial review and handover. |
4. Rapid or initial history
The rapid history is a short, high-yield conversation performed alongside the primary survey. It is not a shortened version of every question; it is a deliberate search for information that changes airway management, resuscitation, medication safety, transport priority or destination.
- What happened, and when did it begin?
- Is the patient’s condition getting better, worse or staying the same?
- What is the main symptom or injury right now?
- What immediate danger is suspected: severe bleeding, airway compromise, poisoning, stroke, sepsis, cardiac chest pain or an unsafe mechanism?
- Does the patient have a serious allergy, take anticoagulants, insulin or seizure medicines, or have an implanted device?
- What treatment has already been given, by whom and with what response?
5. Comprehensive history
A comprehensive history covers the patient’s present complaint and a broad review of relevant health and life circumstances. It may be taken over several encounters rather than in one uninterrupted interview. A complete history commonly includes identification, chief complaint, history of present illness, past medical and surgical history, medicines, allergies, family history, social and occupational history, reproductive history when relevant, functional status and a review of systems.
| Component | Questions or information to obtain | Clinical value |
|---|---|---|
| Patient identity | Name, age, sex, preferred name, language, location and emergency contact according to policy. | Prevents wrong-patient errors and supports communication. |
| Chief complaint | The patient’s main reason for seeking help, preferably in their own words. | Sets the immediate focus without prematurely naming a diagnosis. |
| Present illness | Onset, progression, associated symptoms, severity, triggers, treatments and functional effect. | Builds a clinical timeline and identifies red flags. |
| Previous health | Medical diagnoses, operations, admissions, complications, injuries and baseline function. | Changes risk, differential diagnosis and treatment choices. |
| Medicines and allergies | Prescribed, over-the-counter, herbal and recreational substances; reaction details. | Prevents adverse drug events and reveals treatment failure or overdose. |
| Family and social context | Inherited disease, living conditions, occupation, support, substance use and safety. | Identifies exposure, safeguarding, adherence and discharge risks. |
| Review of systems | Targeted questions about other body systems not covered by the complaint. | Finds associated symptoms and important alternative explanations. |
6. History of the present illness
The history of present illness (HPI) is the story of the current problem from the patient’s last known normal state to the present assessment. Build it chronologically. Start with the patient’s words, then clarify the timing, sequence, associated symptoms, severity, triggers, previous episodes and interventions.
- Last known well or baseline: When was the patient definitely normal?
- Onset: sudden, gradual, witnessed, unwitnessed, during activity or at rest?
- Course: constant, intermittent, progressive, recurrent or resolving?
- Associated symptoms: pain, breathlessness, fever, vomiting, weakness, bleeding, rash, confusion or syncope.
- Previous episodes: similar event, diagnosis, treatment and response.
- Impact: what can the patient no longer do, and what prompted the call today?
- Self-treatment: medicines, food, fluids, traditional remedies, first aid or delayed presentation.
7. Chief complaint and the patient’s own words
The chief complaint is a brief statement of why help was requested, such as “pressure in my chest for two hours” or “fell from a boda boda and cannot move my leg.” Record the patient’s words where possible, then add clinically relevant detail. Do not replace the complaint with an unconfirmed diagnosis such as “heart attack” or “hysterical patient.”
Poor documentation: “Stroke patient.”
8. Focused history: what it is and what it is not
A focused history concentrates on the complaint or injury most likely to explain the patient’s presentation. It is narrower than a comprehensive history but deeper than a rapid history. For example, chest pain requires questions about onset, exertion, pressure, radiation, associated sweating or breathlessness, previous cardiac disease and medicines; a small isolated finger laceration requires a different set of questions about time, contamination, bleeding, tetanus and function.
A focused history must still include safety-critical information. A patient with a “minor” fall may be taking anticoagulants, have lost consciousness or have severe neck pain. The focus changes with risk; it never means ignoring red flags.
9. Medical history
Medical history identifies diagnosed illnesses, previous complications, admissions and the patient’s baseline health. Ask about conditions relevant to the current complaint as well as high-risk conditions that may alter emergency care.
| Area | Examples of questions | Why it matters in EMS |
|---|---|---|
| Cardiovascular | Hypertension, heart failure, angina, myocardial infarction, arrhythmia, stroke or fainting? | Changes risk in chest pain, dyspnoea, collapse and shock. |
| Respiratory | Asthma, COPD, tuberculosis, sleep apnoea, home oxygen or previous intubation? | Predicts airway and ventilation difficulty. |
| Metabolic | Diabetes, kidney disease, thyroid disease or adrenal disease? | Guides glucose assessment, fluid risk and altered consciousness evaluation. |
| Neurological | Seizures, stroke, head injury, dementia, migraine or weakness? | Establishes baseline and identifies new neurological deficits. |
| Infectious and immune | Recent fever, infection, immunosuppression, HIV treatment or exposure? | Changes isolation, PPE and sepsis risk. |
| Psychiatric and substance use | Depression, psychosis, self-harm, alcohol, drugs or withdrawal? | Supports safety planning and explains altered behaviour or vital signs. |
10. Surgical and procedural history
Ask about previous operations, anaesthetics, endoscopies, invasive procedures, implanted devices and complications. Clarify what was done, when, where, why and whether recovery was complete.
- Previous airway difficulty, difficult intubation, anaesthetic reaction or malignant hyperthermia?
- Bleeding or clotting complication, transfusion, infection or poor wound healing?
- Pacemaker, defibrillator, prosthetic valve, vascular graft, shunt, dialysis access or orthopaedic hardware?
- Recent operation, delivery, biopsy, dental procedure or discharge from hospital?
- What operation was performed if the patient describes it only as “surgery”?
Procedures can explain pain, fever, bleeding, altered anatomy, medication changes or a high-risk postoperative emergency. A surgical scar or medical bracelet may provide useful clues, but it does not replace a conversation or record review.
11. Medication history
Medication history includes every substance that may influence the patient: prescribed medicines, injections, inhalers, eye drops, over-the-counter products, herbal preparations, supplements, hormones, alcohol and recreational drugs. Ask what is taken, how much, when the last dose was taken, why it is used, and whether doses have been missed, doubled or changed.
| Medicine group | Questions | Emergency relevance |
|---|---|---|
| Anticoagulants / antiplatelets | Warfarin, apixaban, rivaroxaban, aspirin, clopidogrel; last dose? | Raises bleeding risk after trauma or intracranial symptoms. |
| Insulin and glucose-lowering drugs | Type, dose, timing, food intake and recent readings? | Hypoglycaemia may cause confusion, seizure or collapse. |
| Antihypertensives and diuretics | Recent dose, missed dose, dehydration or vomiting? | May contribute to hypotension, electrolyte disturbance or syncope. |
| Opioids, sedatives and anticonvulsants | Drug, dose, timing, extra doses and access by others? | Can depress consciousness and breathing or indicate overdose. |
| Steroids and immunosuppressants | Long-term use, recent stoppage or dose increase? | Influences infection risk and adrenal stress response. |
| Herbal and recreational substances | Product, amount, route, source and time taken? | May cause toxicity, interactions or unreliable history. |
12. Allergy and adverse-reaction history
Ask, “Are you allergic to any medicine, food, latex or other substance?” If yes, identify the substance and describe the reaction: rash, swelling, wheeze, hypotension, vomiting, fainting or another effect. A side effect such as nausea is different from an immune-mediated anaphylactic reaction, but both should be recorded accurately.
- What was the suspected trigger?
- How soon after exposure did the reaction begin?
- What symptoms occurred, and was the airway or circulation affected?
- Was emergency treatment, adrenaline or hospital admission required?
- Has the patient tolerated a related medicine since?
Never write “allergic” without the reaction. Incomplete allergy information can lead to unsafe treatment or unnecessary avoidance of useful medicines.
13. Family history
Family history is most useful when disease may be inherited or clustered in families. Ask about sudden cardiac death, premature heart disease, stroke, seizures, diabetes, hypertension, asthma, sickle-cell disease, bleeding disorders, mental illness, suicide, sudden unexplained deaths and congenital conditions. Ask which relative was affected and at what age.
Family history is also a safeguarding tool. A child’s unexplained recurrent injury, a dependent adult’s neglect, or a pattern of violence requires sensitive escalation according to local policy. Do not interrogate family members in front of a person who may be at risk from them.
14. Social and lifestyle history
| Domain | Useful questions | Emergency significance |
|---|---|---|
| Home and support | Where do you live? Who is with you? Who can help after discharge? | Determines safety, access to care and ability to follow instructions. |
| Smoking and vaping | What product, how much and for how long? | Airway, cardiovascular, poisoning and fire risks. |
| Alcohol | What was consumed, how much, when and with what medicines? | Intoxication, withdrawal, hypoglycaemia, trauma and aspiration risk. |
| Other substances | Substance, route, amount, time, co-use and source? | Overdose, withdrawal, violence, infection and altered consciousness. |
| Nutrition and hydration | Last meal and fluids; recent vomiting, diarrhoea or fasting? | Hypoglycaemia, dehydration, electrolyte imbalance and pregnancy risk. |
| Safety and violence | Do you feel safe at home? Is anyone threatening or controlling you? | Identifies safeguarding, assault and safe discharge needs. |
| Access and finances | Transport, medication availability, cost and ability to return? | Explains delayed care, non-adherence and recurrence. |
15. Occupational and environmental history
Ask what the patient does, where they work or study, and what they may have been exposed to. Occupation and environment can reveal toxins, heat, cold, dust, noise, vibration, infectious contacts, repetitive strain, electricity, machinery, animals and violence.
- What task was being performed when symptoms or injury began?
- Was there a chemical, gas, smoke, pesticide, medication or unknown substance?
- Was there ventilation, PPE, a confined space, electrical energy, fire or structural instability?
- Were other workers affected, and has the source been isolated?
- What was the patient’s last known safe location and what decontamination has occurred?
- Is this a workplace injury requiring occupational-health or statutory reporting?
Environmental history also covers travel, water and food exposure, recent outbreaks, housing conditions, animal contact and climate. It may transform an apparent asthma attack, rash or fever into an occupational or infectious emergency.
16. Trauma and mechanism-of-injury history
In trauma, the mechanism is a form of history that predicts hidden injury. Ask what struck the patient, what struck the patient’s body, the direction and energy involved, the height or speed, use of restraints or protective equipment, position in a vehicle, ejection, entrapment, crush time, blast, burn source and change in condition.
| Mechanism | High-yield questions | Possible concern |
|---|---|---|
| Road traffic crash | Vehicle type, speed, seat position, restraint, airbag, intrusion, ejection and death in same vehicle? | Head, chest, abdominal, pelvic and spinal injury. |
| Fall | Height, landing surface, body part first, rotation, loss of consciousness and anticoagulants? | Head injury, spinal injury, fractures and internal bleeding. |
| Assault | Weapon, number of blows, strangulation, loss of consciousness, sexual assault and ongoing threat? | Hidden neck, head, internal and safeguarding injuries. |
| Burn or inhalation | Indoor or outdoor, duration, smoke, chemicals, explosion, enclosed space and rescue time? | Airway oedema, toxic inhalation, major burn and shock. |
| Penetrating injury | Object, length, direction, number of wounds, retained object and bleeding? | Vascular, thoracic, abdominal or neurological injury. |
| Crush or entrapment | Body part, weight, duration, release time and pain or swelling after release? | Compartment syndrome, crush syndrome and reperfusion injury. |
17. Paediatric history
Children may not describe symptoms reliably, and the caregiver’s account may be essential. Establish the child’s baseline behaviour, feeding, urine output, immunisation, birth and developmental history when relevant. Ask about the exact dose and timing of medicines or substances because paediatric toxicity is weight-dependent.
- Who was present, and who is the usual caregiver?
- What is the child’s weight or the most recent reliable weight?
- Was the child born prematurely or with a medical condition?
- What is the feeding pattern, wet nappy frequency and activity compared with normal?
- What happened immediately before the change, fall, seizure or breathing problem?
- Are there concerns about accidental injury, neglect or non-accidental injury?
18. Older-person and frailty history
For older adults, ask about baseline cognition, mobility, continence, vision, hearing, falls, living arrangements, carers, swallowing, nutrition and usual medicines. “Confusion” may be delirium, dementia, infection, stroke, hypoglycaemia, medication toxicity or a normal baseline; ask a caregiver what is different today.
19. Reproductive and pregnancy history
When relevant and with privacy, ask about last menstrual period, possibility of pregnancy, gravida and parity, gestational age, antenatal complications, bleeding, abdominal or pelvic pain, fetal movement, delivery history and contraception. In emergencies, a pregnancy possibility can change imaging, medication, positioning and transport decisions.
Use neutral, respectful language. Ask sensitive questions privately where possible, explain why they matter, and do not assume pregnancy status from age or appearance.
20. Psychiatric and mental-health history
Mental-health history is part of routine emergency care, not a judgement about the patient. Ask about mood, anxiety, sleep, psychosis, previous episodes, treatment, substance use, self-harm and current safety when symptoms or behaviour suggest risk.
- What changed today, and what were you hoping would happen by calling for help?
- Do you feel safe right now? Do you have thoughts of harming yourself or someone else?
- Have you made a plan, obtained means, set a time or taken any action?
- Have you previously attempted self-harm, been admitted or received counselling or medication?
- Are voices, substances, withdrawal, head injury, fever or medical illness affecting your behaviour?
- Who can stay with the patient, and what urgent safeguarding measures are needed?
Ask directly and calmly. A safety concern requires immediate supervision, removal of accessible means where safe, senior clinical input and the local emergency mental-health pathway.
21. Functional and disability history
Functional history describes what the patient normally does and what has changed. Ask about walking, transfers, eating, speaking, seeing, hearing, working, self-care, continence, assistive devices and usual level of independence.
| Question | Why it matters |
|---|---|
| What could you do before this event that you cannot do now? | Detects new neurological, musculoskeletal or cardiopulmonary loss. |
| How do you normally move, and do you use a stick, frame or wheelchair? | Separates baseline disability from acute deterioration and guides safe transfer. |
| Who helps with medicines, food, bathing or communication? | Identifies dependency, carer burden and discharge risk. |
| What communication method works best for you? | Supports consent, accurate history and patient dignity. |
22. Review of systems
A review of systems (ROS) is a structured check for symptoms in body systems that may not have emerged in the chief complaint. In emergency care it should be targeted and proportionate, not a long checklist that delays treatment.
| System | Useful screening questions | Red flags |
|---|---|---|
| General | Fever, chills, weight change, fatigue or night sweats? | Sepsis, malignancy, severe infection or shock. |
| Neurological | Headache, weakness, numbness, speech or vision change, seizure or fainting? | Stroke, intracranial bleed, seizure or hypoglycaemia. |
| Respiratory | Cough, sputum, wheeze, pleuritic pain or breathlessness? | Respiratory failure, asthma, pneumonia or pulmonary embolism. |
| Cardiac | Chest pressure, palpitations, exercise intolerance, orthopnoea or leg swelling? | Acute coronary syndrome, arrhythmia or heart failure. |
| Gastrointestinal | Abdominal pain, vomiting, diarrhoea, blood, jaundice or last bowel movement? | Bleeding, obstruction, peritonitis or severe dehydration. |
| Genitourinary | Dysuria, flank pain, urine amount, pregnancy possibility or vaginal bleeding? | Sepsis, renal failure, ectopic pregnancy or obstetric haemorrhage. |
| Skin and immune | Rash, swelling, itching, wounds, bites or new medicine? | Anaphylaxis, meningococcal disease, burns or infection. |
23. Collateral or third-party history
Collateral history is information obtained from a relative, friend, caregiver, police officer, teacher, community health worker, dispatch record, medication list or previous clinical record. It is essential when the patient is unconscious, confused, intoxicated, very young, severely distressed, aphasic, hearing impaired or unable to speak the team’s language.
- Identify the source and relationship to the patient.
- Explain why the information is needed and protect confidentiality.
- Ask when the source last saw the patient at baseline.
- Clarify what was directly observed versus assumed.
- Ask about medicines, allergies, diagnoses, function, events, substances and advance wishes.
- Record the source’s exact relevant words and whether details conflict.
- Compare collateral information with the patient’s account without humiliating or accusing either person.
24. Source reliability and communication barriers
| Barrier | Safe approach | Avoid |
|---|---|---|
| Language difference | Use a trained interpreter or appropriate approved support; speak to the patient, not only the interpreter. | Relying on a child to interpret sensitive or complex information. |
| Hearing impairment | Face the patient, reduce noise, write or use the person’s preferred communication method. | Shouting, pretending to understand or excluding the patient. |
| Speech or aphasia | Allow time, use yes/no choices, writing, gestures and collateral history. | Assuming lack of speech means lack of understanding. |
| Confusion or delirium | Use short questions, assess baseline with a caregiver and repeat key facts. | Taking an inconsistent answer as deliberate dishonesty. |
| Intoxication or severe pain | Stabilise first, ask simple questions and reassess when symptoms improve. | Declaring the history unreliable without trying again. |
| Fear, violence or coercion | Find a private safe opportunity and ask about safety directly. | Questioning a possible perpetrator in the room. |
| Memory impairment | Use records, medication packages and a trusted caregiver; document uncertainty. | Inventing a complete history from assumptions. |
25. Open and closed questions
Begin with an open question to let the patient tell the story in their own way, then use focused closed questions to clarify details. A sequence that begins too narrowly can miss the patient’s main concern; a sequence that remains completely open can delay urgent decisions.
| Question style | Example | Best use |
|---|---|---|
| Open | “Tell me what happened from the beginning.” | Start the story and observe the patient’s priorities. |
| Clarifying | “When you say dizzy, do you mean the room spins or you feel faint?” | Translate everyday words into clinically useful meaning. |
| Closed | “Did you lose consciousness: yes or no?” | Confirm a specific safety fact quickly. |
| Sequencing | “What happened immediately before the pain began?” | Build a timeline and identify triggers. |
| Scaling | “On a scale of 0 to 10, how severe is the pain now?” | Measure severity and response to treatment. |
| Safety | “Do you feel safe going home today?” | Detect violence, neglect, self-harm or unsafe discharge. |
Avoid leading questions such as “You did not take extra tablets, did you?” Instead ask, “What medicines or substances have you taken, and how much?”
26. OPQRST and symptom analysis
OPQRST is a symptom-analysis framework commonly used inside a focused history. It is particularly useful for pain and other time-linked complaints. It complements, rather than replaces, a broader history.
| Letter | Meaning | Example prompt |
|---|---|---|
| O | Onset | When did it start? Sudden or gradual? What were you doing? |
| P | Provocation / palliation | What brings it on, worsens it or relieves it? |
| Q | Quality | How does it feel: pressure, burning, tearing, cramping or sharp? |
| R | Region / radiation | Where is it? Does it travel anywhere? |
| S | Severity | How severe is it now, at its worst and at baseline? |
| T | Time / trend | How long does it last? Is it becoming more frequent or severe? |
27. History in altered consciousness
When consciousness is altered, history may be obtained from witnesses while the team assesses airway, breathing, circulation, glucose and neurological status. Ask about the last known normal time, witnessed seizure, fall or head strike, medications, diabetes, alcohol or drugs, fever, pregnancy, previous seizures, stroke, infection and access to toxins.
- What was the patient doing immediately before becoming confused or unresponsive?
- Was there a warning, collapse, stiffening, shaking, incontinence or tongue injury?
- How long did the event last, and how did the patient behave afterwards?
- Was there a new headache, weakness, speech change, fever or rash?
- Has this happened before, and what treatment is normally used?
Do not label the patient “uncooperative” or “intoxicated” until medical causes have been considered. Altered behaviour can be the first sign of hypoxia, hypoglycaemia, sepsis, stroke, trauma or poisoning.
28. Ongoing and interval history
An ongoing or interval history is taken after an earlier assessment to detect change. It is essential during ambulance transport, waiting for referral, observation, prolonged extrication and after treatment.
| Repeat question | Why repeat it? |
|---|---|
| What is the symptom now compared with the first assessment? | Shows improvement, deterioration or a new complaint. |
| Has the pain, breathing, weakness, bleeding or nausea changed? | Detects treatment response and evolving disease. |
| What treatment was given and when? | Prevents duplication and identifies adverse effects. |
| Any new allergy, exposure, vomiting or loss of consciousness? | Finds delayed complications and changes in risk. |
| What is the patient’s concern now? | Maintains patient-centred care and reveals information missed earlier. |
Document the time of each reassessment. “Stable” is not a complete assessment; record the relevant symptoms, observations and response.
29. Prehospital and dispatch history
Emergency history starts before patient contact. Dispatch information, caller statements, location clues, call-back details, hazards, mechanism, number of patients and first-responder treatment form the initial history. Treat dispatch information as a starting point and verify it because callers may be frightened, distant from the patient or unfamiliar with medical terms.
- Record the time of call, dispatch, arrival, first contact and departure.
- Confirm the exact address, access route, scene hazards and contact person.
- Ask what the caller saw, not only what diagnosis they were told.
- Identify changes between the call and arrival.
- Record treatment provided before EMS arrival, including dose and timing if known.
- Ask about additional patients, infectious hazards, weapons, fire, electricity, traffic or animals.
30. Documentation of history
Document facts in a way another clinician can understand without guessing. Use the patient’s words for the complaint, objective times for events, standard abbreviations approved by the service and clear attribution for collateral information.
| Document | Example |
|---|---|
| Source | “History obtained from patient and daughter; patient confused and daughter witnessed onset.” |
| Time course | “Last known well 09:00; right-arm weakness first observed at 09:20.” |
| Relevant negative | “Denies chest pain, fever, anticoagulant use or recent fall.” |
| Uncertainty | “Medication dose unknown; packet not available; neighbour reports ‘two tablets.’” |
| Change after care | “Breathlessness reduced from 8/10 to 4/10 ten minutes after oxygen; still speaking in short sentences.” |
| Patient preference | “Patient requests female staff for sensitive questions; privacy provided.” |
Never alter a record to make it look as though an assessment was done earlier. Correct errors transparently according to the organisation’s documentation policy.
31. Consent, privacy and cultural safety
- Introduce yourself, confirm the patient’s identity and explain why you need the information.
- Seek consent where the patient has capacity; emergency care may proceed under applicable emergency principles when delay threatens life.
- Provide privacy for sexual, reproductive, mental-health, violence and substance-use questions.
- Use a professional interpreter when needed and protect the patient from unnecessary exposure of sensitive information.
- Ask the patient how they would like to be addressed and respect cultural, religious and family preferences while maintaining safety.
- Share history only with people involved in care, safety, referral, legal duty or authorised quality review.
- Do not discuss patients in public areas, social media or unofficial messaging groups.
32. Reliability, bias and clinical reasoning
Every history may contain incomplete recall, fear, shame, language differences, cognitive impairment or assumptions. “Reliability” is not a judgement about the patient’s character; it describes how much the team can verify and what uncertainty remains.
| Cognitive error | How it appears | Correction |
|---|---|---|
| Anchoring | Accepting the first label, such as “just drunk,” and ignoring new signs. | Reassess ABCs, glucose, trauma and alternative causes. |
| Leading questions | Asking questions that suggest the desired answer. | Use open questions followed by neutral clarification. |
| Confirmation bias | Collecting only information supporting the initial diagnosis. | Ask, “What finding would make this explanation wrong?” |
| Hindsight bias | Judging the patient or crew as though the final diagnosis was obvious from the start. | Review what was knowable at each time point. |
| Stereotyping | Attributing symptoms to age, sex, disability, poverty or mental illness. | Use the same safety assessment and evidence-based questions for everyone. |
33. Red flags that change the history priority
- Difficulty speaking, stridor, cyanosis, severe respiratory distress or inability to protect the airway.
- Uncontrolled bleeding, cold clammy skin, severe weakness or signs of shock.
- Sudden neurological deficit, seizure, collapse, severe headache or altered consciousness.
- Chest pressure, severe breathlessness, syncope or palpitations with instability.
- Severe abdominal pain, pregnancy with bleeding or fainting, rigid abdomen or gastrointestinal bleeding.
- Possible poisoning, overdose, unknown tablets, chemical exposure or carbon monoxide.
- High-risk trauma: ejection, death in the same vehicle, fall from height, penetrating injury or anticoagulant use.
- Threat of self-harm, violence, abuse, unsafe home environment or an unprotected child or dependent adult.
When a red flag is present, announce it, treat or escalate, and obtain the remaining history in parallel. Do not wait for a perfect story before calling for help.
34. Emergency handover from history
A useful handover turns the history into a concise clinical picture. State the patient’s identity and age, chief complaint, time course, important history, vital observations, findings, treatment, response, risks and what you need from the receiving team.
35. Worked emergency scenarios
Scenario 1: Sudden weakness
A woman is found unable to speak clearly. The EMT confirms airway and breathing, establishes the last known normal time from her sister, asks about anticoagulants, diabetes, seizure, headache and trauma, checks glucose and rapidly escalates for suspected stroke. The exact onset time is more valuable than a vague statement that she “became sick in the morning.”
Scenario 2: Road traffic collision
A restrained passenger has chest pain after a crash. The EMT asks about speed, impact direction, intrusion, airbag, seat position, loss of consciousness, anticoagulants and other casualties while another responder controls bleeding and performs the primary survey. Mechanism and symptoms guide spinal, thoracic and internal-injury precautions.
Scenario 3: Confusion in a diabetic patient
A family member reports that the patient took insulin but skipped lunch. The EMT asks about the dose and time, food intake, previous episodes, kidney disease, alcohol and seizure activity, while checking glucose and protecting the airway. The history provides an explanation, but treatment and reassessment must confirm response.
Scenario 4: Possible domestic violence
A patient with facial bruising is accompanied by a partner who answers every question. The EMT obtains immediate safety information, creates a private opportunity to speak, asks about strangulation, weapons, pregnancy and children, documents the patient’s words and follows safeguarding and referral procedures. The partner’s account is not assumed to be the patient’s account.
Scenario 5: Unresponsive young adult
Friends report alcohol use, but nobody knows what else was taken. The EMT treats the patient as an undifferentiated emergency: asks when the person was last normal, searches for packets or medical information, considers trauma, glucose, seizure and poisoning, and communicates uncertainty honestly at handover.
36. Common mistakes in history taking
- Taking a long history before treating an airway, breathing, circulation or major bleeding threat.
- Using a diagnosis as the history instead of recording the patient’s symptoms and timeline.
- Asking only yes/no questions and missing the patient’s own story.
- Leading the patient toward the answer the EMT expects.
- Failing to ask the last known normal time in neurological or altered-consciousness presentations.
- Recording “no allergies” when the question was never asked or the patient cannot remember.
- Writing “on medication” without identifying the medicine, dose and last time taken.
- Ignoring pregnancy possibility, anticoagulant use, insulin, substance exposure or safeguarding.
- Accepting a bystander’s diagnosis without checking what was actually observed.
- Failing to repeat the history after treatment or deterioration.
- Using stigmatising language such as “drug seeker,” “hysterical” or “non-compliant.”
- Discussing sensitive information loudly or in front of a possible perpetrator.
- Documenting assumptions as facts and omitting uncertainty.
- Forgetting to communicate the most important history during handover.
37. EMT history-taking checklist
- Have I introduced myself, confirmed identity and explained the purpose?
- Is the scene safe, and have I completed the primary survey?
- What is the chief complaint in the patient’s own words?
- When was the patient last known to be normal?
- What happened, in what sequence, and is the condition changing?
- Which history type is appropriate: rapid, focused, comprehensive, trauma or collateral?
- Have I asked about medicines, allergies, major illnesses, operations and relevant risks?
- Have I considered pregnancy, safeguarding, mental health, substance exposure and functional baseline?
- What information came from a witness, caregiver, record or dispatch rather than the patient?
- What red flags require immediate escalation or transport?
- What changed after treatment, movement or time?
- Have I documented source, times, uncertainty and relevant negatives?
- Can I give a clear handover with the history, observations, treatment and outstanding concern?
38. Examination comparison table
| Situation | History priority | Do not delay |
|---|---|---|
| Unstable patient | Rapid facts that change resuscitation and destination. | Airway, breathing, circulation, bleeding control, urgent transport. |
| Stable single complaint | Focused history plus relevant past, medication and allergy history. | Focused examination and baseline observations. |
| Unclear or multi-system complaint | Comprehensive history with targeted review of systems. | Repeat assessment if the patient deteriorates. |
| Trauma | Mechanism, time, energy, protective devices, loss of consciousness and anticoagulants. | Spinal/bleeding/airway priorities and rapid transport when indicated. |
| Altered consciousness | Last known normal, witness account, seizure, glucose, drugs, trauma and baseline function. | Airway protection, glucose check, oxygenation and escalation. |
| Child or communication barrier | Caregiver/collateral history plus baseline function and weight. | Safeguarding, consent and a safe communication method. |
39. Revision questions
- Define history taking and explain why it remains important in emergency care.
- Differentiate rapid, focused and comprehensive history.
- When should an EMT prioritise a rapid history?
- List the major components of a comprehensive history.
- What is the history of present illness, and why should it be chronological?
- What information belongs in a medication history?
- Why must the reaction be recorded when a patient reports an allergy?
- Give six questions for a road traffic collision mechanism.
- What is collateral history, and when is it needed?
- How would you assess the reliability of a third-party source?
- Differentiate open, closed, clarifying, sequencing and safety questions.
- Use OPQRST to assess a patient with chest pain.
- Why is “last known normal” important in altered consciousness?
- List key components of paediatric history.
- What baseline functional questions are important for an older person?
- Which sensitive areas require privacy during history taking?
- How can leading questions and anchoring harm emergency assessment?
- What should be repeated during an interval history?
- Write a clear history handover for a patient with suspected stroke.
- Explain why “stable” is not an adequate documentation entry.
- List eight red-flag answers that require immediate escalation.
- How should an EMT manage a language or hearing barrier?
- What is the difference between a symptom and a diagnosis in documentation?
- Describe the role of dispatch history in prehospital assessment.
- Why should mental-health questions be asked directly and without judgement?
40. Key take-home principles
- History is a clinical intervention: it identifies risk, directs examination and guides urgency.
- Choose the type of history according to acuity, complaint, mechanism, age and communication ability.
- Start open, clarify neutrally, then ask focused safety questions.
- Always connect the story to time, baseline function, vital observations and response to care.
- Collateral information is essential when the patient cannot provide a reliable account.
- Document what was said, who said it, when it occurred and what remains uncertain.
- Protect privacy and dignity while asking about violence, self-harm, substances, sexuality and pregnancy.
- When a red flag appears, treat and escalate immediately; history can continue in parallel.
References and further reading
- SlideShare: History Taking in Medicine.
- SlideShare: Focused History and Physical Examination.
- U.S. EMS: EMT patient-assessment refresher, focused history and SAMPLE framework.
- NCBI Bookshelf: Health history and focused assessment questions.
- WHO Emergency Care: reference card for emergency-unit assessment.