Clinical history taking and physical examination

In short

Clinical history taking is the structured verbal enquiry that converts a patient's story into a differential diagnosis; physical examination is the systematic use of the senses and simple instruments to confirm or refute it. Together they still settle or strongly narrow the diagnosis in the majority of cases before any investigation, and they decide which investigation is worth ordering — critical in Indian practice where out-of-pocket spending dominates. These two skills form the backbone of the NMC Competency-Based Medical Education (CBME) curriculum, the AETCOM modules, and every clinical examination: the long case, short case, OSCE/OSPE, and the clinical and viva components of MBBS university exams, FMGE, and PG/DNB entrance and exit assessments. Employers — government hospitals, medical colleges, corporate chains (Apollo, Fortis, Manipal, AIIMS network), insurers' medical panels and teleconsultation platforms — assess exactly this at interview.

Explained

Framework, consent, ethics and the record

• Setting: adequate light, privacy (curtain/screen), patient comfortable, examiner on the patient's right side, warm hands, hand hygiene before and after contact.
• Introduction: name, designation, purpose; take informed consent for history and examination. Consent must be *informed, voluntary and by a competent person*; for a minor or an unconscious patient, by the guardian or legally acceptable representative, with emergency treatment allowed under the doctrine of necessity.
• Chaperone is mandatory practice for intimate examination (breast, genital, rectal, per-vaginal), especially a female attendant for a female patient; record the chaperone's name.
• Confidentiality is a professional and legal duty; disclosure only with consent or where law requires (notifiable disease, court order, POCSO Act 2012 reporting of sexual offences against children, medico-legal cases).
• Ethics and conduct: the Indian Medical Council (Professional Conduct, Etiquette and Ethics) Regulations, 2002 remain the operative code; NMC notified replacement regulations in 2023 which were kept in abeyance — check the NMC's current notification before quoting a clause.
• Records: maintain a legible, dated, signed case sheet; the 2002 Regulations require records of indoor patients to be kept for 3 years and supplied to the patient on request within 72 hours. Hospitals additionally follow the Clinical Establishments (Registration and Regulation) Act, 2010 and NABH standards; medico-legal records are kept far longer by institutional policy.
• Teleconsultation: the Telemedicine Practice Guidelines, 2020 (now part of the professional conduct framework) allow history taking and limited visual examination remotely, and require the consultation and prescription to be documented.
• Language and dignity: take history in the patient's language or through an interpreter; avoid leading questions, jargon, and value judgements. Use open questions first, closed questions later.

History taking: the standard sequence

1. Demographics: name, age, sex, address/native place (endemic disease clues), occupation, education, marital status, religion where relevant, and the informant with reliability (vital in paediatrics and altered sensorium).
2. Chief complaints: in the patient's own words, each with duration, listed in chronological order of onset. Three to five complaints only; do not write diagnoses here.
3. History of presenting illness (HOPI): the heart of the case. For every symptom use SOCRATES for pain (Site, Onset, Character, Radiation, Associated features, Timing, Exacerbating/relieving factors, Severity) and, generally, onset–duration–progression–periodicity–aggravating/relieving factors–associated symptoms–treatment taken and response. Include negative history (pertinent absent symptoms) which excludes differentials.
4. Past history: previous similar episodes, hypertension, diabetes, tuberculosis (and ATT taken, with duration and completion), asthma, epilepsy, jaundice, rheumatic fever, blood transfusion, surgeries, hospitalisations, COVID-19.
5. Treatment/drug history: all current drugs with dose and duration, over-the-counter and indigenous (AYUSH) medicines, steroids, NSAIDs, oral contraceptives, drug allergy with the nature of the reaction.
6. Family history: three-generation pedigree where relevant; consanguinity (common in parts of South India), diabetes, hypertension, ischaemic heart disease, stroke, cancers, tuberculosis contact, inherited anaemias (thalassaemia, sickle cell in tribal belts of central India).
7. Personal history: diet (vegetarian/mixed, adequacy), appetite, sleep, bowel and bladder habit, smoking (type — cigarette, beedi, hookah — with pack-years), smokeless tobacco (khaini, gutkha, pan masala), alcohol (type, quantity, duration), other substance use, high-risk sexual behaviour.
8. Menstrual and obstetric history in females: age at menarche, cycle length and regularity written as e.g. 5/28 days, LMP, obstetric score (G–P–L–A), contraception, menopause.
9. Birth, developmental and immunisation history in children: antenatal/natal/postnatal events, milestones, immunisation per the Universal Immunisation Programme schedule, feeding history.
10. Socio-economic and environmental history: income and occupation of the earning member, housing, crowding, water source, sanitation, cooking fuel (biomass smoke), pets and animal contact, travel; classify by a standard scale such as modified Kuppuswamy (urban) or BG Prasad (per-capita-income based, revised with the consumer price index).
11. Systemic review (general enquiry): a quick symptom screen of all systems to catch what the patient did not volunteer.
12. Summary: three to four sentences restating age, sex, risk factors, key positives and negatives, ending in a provisional and differential diagnosis.

General physical examination (GPE)

• First look: level of consciousness and orientation, posture and decubitus, built and nourishment, hydration, obvious distress, respiratory difficulty, abnormal movements, attitude of limbs.
• The classical signs: pallor (lower palpebral conjunctiva, tongue, palms, nail bed), icterus (upper sclera in natural daylight), cyanosis — central (tongue, lips, buccal mucosa) versus peripheral (nail beds, extremities), clubbing (loss of Lovibond's angle, fluctuant nail bed, Schamroth's window sign; graded 1–4), koilonychia, leuconychia, lymphadenopathy (site, size, number, consistency, tenderness, matting, mobility, overlying skin), oedema (pitting versus non-pitting, extent, and whether bilateral dependent or localised), dehydration, and jugular venous pressure.
• JVP: patient at 45°, neck turned slightly, measure the top of the internal jugular pulsation vertically above the sternal angle; normal ≤ 3–4 cm (≈ 8–9 cm H₂O from the right atrium). JVP is distinguished from the carotid pulse by being non-palpable, obliterable by light pressure, having an upper fluctuating level, rising with the hepatojugular reflux manoeuvre, and varying with posture and respiration.
• Head to toe: scalp and hair, facies, eyes (conjunctiva, cornea, pupils), oral cavity (dental hygiene, submucous fibrosis and leukoplakia from tobacco, candidiasis, glossitis, angular stomatitis), thyroid, breast, spine, skin, pressure areas, genitalia and per-rectal examination when indicated.
• Vitals: pulse, blood pressure, respiratory rate, temperature, SpO₂, and (as the "fifth vital sign") pain score; plus height, weight, BMI, waist circumference, and mid-upper arm circumference in children.
• Pulse: rate, rhythm (regular / irregularly irregular / regularly irregular), volume, character (collapsing, slow-rising, pulsus bisferiens), radio-radial and radio-femoral delay, condition of the vessel wall, and all peripheral pulses.
• Blood pressure: sphygmomanometer cuff bladder covering ~80% of arm circumference and ~40% of its width, arm at heart level, after 5 minutes' rest; palpatory method first to avoid the auscultatory gap, then auscultate — Korotkoff phase I = systolic, phase V = diastolic. Record the arm, position and cuff size. Check both arms at first visit, and lying-to-standing for postural drop (fall of ≥ 20 mmHg systolic or ≥ 10 mmHg diastolic).
• Respiratory rate must be counted for a full minute without the patient's awareness; temperature by the oral, axillary (≈ 0.5 °C lower) or rectal route (≈ 0.5 °C higher).

Systemic examination: the four steps, in order

Each system follows inspection → palpation → percussion → auscultation (abdomen: inspection → auscultation before palpation in some schools, since palpation alters bowel sounds; palpate the tender area last).

• Respiratory: shape and symmetry of the chest, trachea position, apical impulse, chest expansion (normal ≈ 3–5 cm), tactile vocal fremitus, percussion note (resonant / dull / stony dull / hyper-resonant), breath sounds (vesicular, bronchial, diminished), added sounds (crackles, wheeze, pleural rub), vocal resonance.
• Cardiovascular: JVP and peripheral pulses, apex beat position (normally in the 5th left intercostal space ~ 9 cm from the midline, inside the mid-clavicular line) and character (tapping, heaving, hyperdynamic), parasternal heave and thrill, all four auscultatory areas plus axilla and back; describe a murmur by timing, site, grade (1–6), character, radiation and response to posture/respiration.
• Abdomen: quadrants/nine regions, contour, umbilicus, visible veins and peristalsis, scars, hernial orifices; superficial then deep palpation, organ palpation (liver edge and span by percussion, normally 12–15 cm; spleen towards the right iliac fossa; kidneys bimanually), shifting dullness and fluid thrill for ascites, bowel sounds and bruits, then per-rectal examination.
• Nervous system: higher functions and speech, cranial nerves I–XII, motor system (bulk, tone, power by the MRC grade 0–5, reflexes 0–4+, plantar response), sensory system (touch, pain, temperature, vibration, joint position, cortical sensations), cerebellar signs, gait, and meningeal signs (neck stiffness, Kernig, Brudzinski).
• Musculoskeletal: look–feel–move–measure, joint range of motion with a goniometer, limb length, special tests; and in trauma the airway–breathing–circulation sequence takes precedence over regional examination.

Clinical reasoning and documentation

• Hypothetico-deductive reasoning: the first two minutes of history generate two or three hypotheses; the remaining questions and the examination are chosen to discriminate between them.
• Red flags must be sought actively: weight loss, night sweats, haemoptysis, melaena, thunderclap headache, chest pain with sweating, fever with altered sensorium, breathlessness at rest.
• Diagnostic value of a sign is expressed as sensitivity, specificity and likelihood ratio — a sign with a high positive likelihood ratio (e.g. a third heart sound for heart failure) rules in; a highly sensitive sign when absent rules out.
• SOAP note for follow-up: Subjective, Objective, Assessment, Plan. Case sheet entries must be timed, dated and signed; corrections struck through once and initialled, never erased or overwritten.
• Handover uses structured tools such as SBAR (Situation, Background, Assessment, Recommendation).
• Special situations: the unconscious patient (GCS, pupils, fundus, posture, collateral history), the elderly (polypharmacy, falls, cognition, sensory loss, atypical presentation), children (opportunistic examination, parent's lap, painful parts last), pregnancy (left lateral tilt, obstetric abdominal examination), the psychiatric patient (mental status examination; admission and treatment governed by the Mental Healthcare Act, 2017), and the medico-legal case (verbatim history, no opinion on culpability, injuries described by site/size/shape/age).

Limitations and the examination itself

• Strengths: no cost, no radiation, immediately repeatable, builds the therapeutic relationship, and often the only tool available at a primary health centre or on a home visit.
• Limitations: inter-observer variability, low sensitivity for early disease, dependence on patient cooperation and body habitus (obesity, emphysema), and the inability to quantify (hence imaging, ECG, blood gases and laboratory tests as separate competencies).
• How it is tested: the long case (full history + examination + discussion, 30–45 minutes), short cases (focused sign elicitation), OSCE stations (consent, focused history, specific manoeuvre, communication, breaking bad news from the AETCOM module), spotters, and viva. Marks are lost mainly on sequence, consent, exposure and summary — not on exotic knowledge.

Key points

• Chief complaints - patient's words with duration, chronological, never a diagnosis.
• HOPI - onset, duration, progression, aggravating and relieving factors, associated and pertinent negative symptoms.
• SOCRATES - the eight-point analysis of any pain.
• Informed consent and chaperone - mandatory before examination, especially intimate examination; document both.
• Examiner's position - always the patient's right side, good light, privacy, warm hands.
• Cyanosis - central involves tongue and mucosa; peripheral spares them and reflects poor perfusion.
• Clubbing - earliest sign is loss of the Lovibond nail-fold angle (normally < 160°, becomes ≥ 180° in clubbing); Schamroth's window closes.
• JVP - measured vertically above the sternal angle at 45°; normal ≤ 3–4 cm; obliterable and non-palpable, unlike the carotid.
• BP technique - correct cuff size, palpate before auscultating, both arms at first visit, check postural drop.
• Apex beat - 5th left intercostal space medial to the mid-clavicular line; note position and character separately.
• Liver span - percussed, 12–15 cm; a palpable liver is not necessarily enlarged (it may be pushed down).
• Order of abdominal examination - inspection, (auscultation), palpation light before deep, percussion, tender area last.
• GCS - E4 + V5 + M6, minimum 3, maximum 15; ≤ 8 is severe injury and an indication to protect the airway.
• MRC power grading - 0 none to 5 normal; reflexes graded 0 to 4+.
• BMI Indian cut-offs - overweight ≥ 23, obesity ≥ 25 kg/m²; abdominal obesity waist ≥ 90 cm (men), ≥ 80 cm (women).
• Socio-economic scales - modified Kuppuswamy (urban) and BG Prasad (income-based, CPI-revised).
• Records - indoor records kept 3 years and given to the patient within 72 hours of a request under the 2002 Ethics Regulations.
• Summary - a good case ends with a four-line summary, provisional diagnosis and differentials, not a list of findings.

Formulas and examples

Example 1 — BMI and central obesity. A 46-year-old man: weight 68 kg, height 1.62 m, waist 94 cm, hip 98 cm.

• BMI = 68 / (1.62)² = 68 / 2.6244 = 25.9 kg/m² → obese by Asian-Indian criteria (would be only "overweight" by the WHO 25–29.9 band).
• Waist 94 cm > 90 cm → abdominal obesity; WHR = 94/98 = 0.96 (> 0.90, raised risk).
• Conclusion to write: obese with central obesity — screen for metabolic syndrome.

Example 2 — Pulse pressure and MAP. BP 160/60 mmHg in a 70-year-old.

• PP = 160 − 60 = 100 mmHg (wide).
• MAP = 60 + 100/3 = 60 + 33.3 = 93.3 mmHg.
• A wide pulse pressure with a collapsing pulse directs examination to aortic regurgitation; without it, isolated systolic hypertension of arterial stiffening is likelier.

Example 3 — Smoking quantification. A patient smokes 15 cigarettes a day for 22 years.

• Pack-years = (15/20) × 22 = 0.75 × 22 = 16.5 pack-years — recorded objectively rather than as "moderate smoker".

Example 4 — Dehydration in a child. A 12 kg child, 7% dehydrated by clinical signs.

• Deficit = 7 × 12 × 10 = 840 mL.
• Maintenance = (100 × 10) + (50 × 2) = 1000 + 100 = 1100 mL/24 h.
• Total for 24 h = 840 + 1100 = 1940 mL (plus ongoing losses) — the clinical examination alone generated the prescription.

Example 5 — GCS in head injury. Opens eyes to painful stimulus (E2), makes incomprehensible sounds (V2), withdraws from pain (M4).

• GCS = 2 + 2 + 4 = 8/15 → severe head injury; secure the airway and image the head.

Example 6 — BSA for dosing. Height 165 cm, weight 60 kg.

• BSA = √(165 × 60 / 3600) = √(9900/3600) = √2.75 = 1.66 m².

Where it is used

• Government service: medical officers in PHCs, CHCs and district hospitals under the National Health Mission, where history and examination plus a few point-of-care tests are the whole diagnostic armoury; also ESIC, Railways and CAPF medical boards.
• Hospital clinical practice: admission notes, daily rounds, pre-anaesthetic evaluation (ASA grading, airway assessment), triage in casualty, and NABH-audited case-record documentation in corporate chains.
• Academic and exam roles: teaching in medical colleges under CBME, running OSCE and skills-lab stations, and clinical examinership for university and NMC-recognised exams.
• Insurance, occupational and public health: pre-policy and claim medical examinations, fitness-to-work and periodic occupational health examinations (now governed by the Occupational Safety, Health and Working Conditions Code, in force from 21 November 2025 with the other three Labour Codes), driving-licence and pre-employment fitness certificates.
• Medico-legal work: injury reports, age estimation, sexual-assault examination under the POCSO Act, 2012 and the Bharatiya Nyaya Sanhita framework, and post-mortem-related clinical correlation — where the written examination record becomes court evidence.
• Telemedicine and digital health: structured history for e-consultations under the Telemedicine Practice Guidelines, 2020, and clinical content/triage roles in companies such as Practo, Apollo 24|7 and Tata 1mg; ABDM-linked electronic records.

Interview questions

• Q: What is the single most important part of a clinical case? A: The history of presenting illness — it generates the differential diagnosis, and studies consistently show history alone yields the correct diagnosis in a majority of medical outpatients.
• Q: How do you distinguish central from peripheral cyanosis? A: Central cyanosis involves the tongue and buccal mucosa and is caused by arterial desaturation or abnormal haemoglobin; peripheral cyanosis spares the tongue and reflects reduced peripheral flow, as in cold exposure or shock.
• Q: How is JVP measured and why does it matter? A: With the patient at 45°, the vertical height of the top of the internal jugular pulsation above the sternal angle; normal is ≤ 3–4 cm, and a raised JVP indicates right atrial pressure elevation from fluid overload, right heart failure, tamponade or constrictive pericarditis.
• Q: Why palpate the blood pressure before auscultating it? A: To find the approximate systolic level and avoid under-reading because of the auscultatory gap, and to avoid over-inflating the cuff.
• Q: What errors in cuff technique falsely raise blood pressure? A: A cuff too small for the arm, arm below heart level, unsupported arm, talking, a full bladder, no rest period, and deflating too fast.
• Q: A liver is palpable 3 cm below the costal margin — is it enlarged? A: Not necessarily; percuss the upper border and compute the span (normal 12–15 cm). Emphysema or a subdiaphragmatic process can push a normal liver down.
• Q: What is the GCS of a patient who is not opening eyes, not speaking, and extends to pain? A: E1 + V1 + M2 = 4/15 — severe impairment requiring airway protection.
• Q: Why are Asian-Indian BMI cut-offs lower than WHO's? A: Indians have higher body fat and visceral fat at the same BMI with cardiometabolic risk appearing earlier, so the consensus cut-offs are ≥ 23 for overweight and ≥ 25 for obesity.
• Q: What is a pertinent negative and give an example? A: A deliberately sought absent symptom that changes the differential — e.g. absence of fever and weight loss in chronic cough makes tuberculosis less likely; record it in the HOPI.
• Q: Can you examine an unconscious patient without consent? A: Yes — emergency care proceeds under the doctrine of necessity in the patient's best interest; consent is then taken from the legally acceptable representative as soon as available and the circumstances documented.
• Q: How long must inpatient records be kept, and must you give them to the patient? A: Under the 2002 Ethics Regulations, indoor records are retained for 3 years and must be supplied to the patient or an authorised attendant on request within 72 hours.
• Q: What is the order of examining a tender abdomen? A: Inspection, then auscultation if bowel sounds matter, then light palpation starting away from the tender site, deep palpation, organ palpation and percussion — the tender area last.

Common mistakes

• Writing diagnoses or interpretations in the chief complaints ("complaints of CCF"), instead of symptoms with durations.
• Omitting consent, exposure, privacy and the chaperone in OSCE stations — the commonest avoidable mark loss.
• Reporting signs not actually elicited (the "textbook" splenomegaly), which collapses under one cross-question.
• Examining from the patient's left side, or examining through clothes without adequate exposure.
• Counting respiratory rate for 15 seconds, or while the patient knows they are being watched.
• Skipping the socio-economic, occupational, tobacco and travel history, which is where endemic and occupational disease clues lie in India.
• Ending the case with a list of findings and no summary, provisional diagnosis or differential — and no plan of investigation that follows from the findings.
• Treating investigations as a substitute for examination, so an abnormal report is acted on without a clinical correlate.

Related topics

Internal medicine: cardiovascular and respiratory diseases · Internal medicine: gastrointestinal, renal and endocrine diseases · Infectious and tropical diseases in India · Psychiatry: common disorders and their management · Electrocardiography (ECG): recording and interpretation · X-ray imaging basics