Why examiner asks:
Tests diagnostic reasoning and differential-building approach.

How to answer:
State classical definition and broad causes.

Model Answer:
PUO = fever ≥ 38.3°C (101°F) on ≥ 2 occasions lasting > 3 weeks, and diagnosis not made after 1 week of inpatient evaluation.

Causes (Major Groups):
1️⃣ Infectious: TB, abscess, endocarditis.
2️⃣ Malignancy: Lymphoma, leukemia.
3️⃣ Autoimmune: SLE, vasculitis, adult-onset Still’s disease.
4️⃣ Miscellaneous: Drug fever, factitious.

Tip (Clue): “Rule out infection → inflammation → infiltration.”

Approach: Reassess history/exam → basic labs (CBC, ESR/CRP, blood cultures ×3, LFT/RFT, urinalysis, chest X-ray) → targeted tests guided by clues (CT chest/abdomen, TB workup, serology, autoimmune markers, PET-CT if available) → biopsy of accessible lesion (lymph node, liver, bone marrow) if persists.
• Key: Systematic stepwise testing; avoid blind broad antibiotics.

Why examiner asks:
Tests rational, supportive management and recognition of warning signs.

How to answer:
Supportive care + fluid management + monitoring.

Diagnosis: Suspected with high fever, severe myalgia, retro-orbital pain, rash, leucopenia/thrombocytopenia.

Confirm: NS1 antigen (early), IgM serology (from day 4–5), PCR (research/early).

Model Answer: supportive care is very important.

• No specific antiviral.
• Fluids: Oral rehydration or IV crystalloids (as per WHO 2024).
• Avoid NSAIDs & steroids. Use Paracetamol only.
• Monitor: Platelets, Hct, urine output.
• Transfuse platelets only if < 10,000/mm³ or bleeding.

• Warning signs: Monitor for warning signs (persistent vomiting, abdominal pain, bleeding, rising hematocrit with falling platelets).→ admit.

Tip (Clue): “Dengue treatment = fluids, not platelets.”  • Key: Fluid management and early detection of plasma leakage.

How to answer:
Identify species → classify → treat per NVBDCP.

Model Answer:
1️⃣ Diagnosis: Peripheral smear / Rapid antigen test (HRP2, pLDH).
2️⃣ Treatment:

• Uncomplicated P. vivax: Chloroquine (25 mg/kg over 3 days) + Primaquine 0.25 mg/kg daily × 14 days.
• Uncomplicated P. falciparum: ACT (Artemether–Lumefantrine 3 days) + Primaquine single dose 0.75 mg/kg (gametocidal).
• Severe malaria: IV Artesunate 2.4 mg/kg at 0, 12, 24 h → daily + supportive therapy, then ACT 3 days.

3️⃣ Supportive: Fluids, manage hypoglycemia, treat anemia.

Tip (Clue): “ACT for falciparum; Chloroquine for vivax.”

How to Answer:

Emphasize early stabilization, pain control, antivenom use, and management of autonomic storm (hypertension or pulmonary edema).

Model Answer:

1️⃣ First Aid at Scene:

• Reassure the patient (panic increases autonomic symptoms).
• Immobilize limb and apply ice pack (reduces pain and venom spread).
• Avoid tourniquet, incision, or suction.

2️⃣ Emergency Department Management:

💡 Tip (Clue):
“Prazosin saves lives — give early and repeat if symptoms persist.”

📘 Reference:
Harrison 22/e, Ch. 410; API Textbook of Medicine 12/e, Vol 2; ICMR Guidelines on Scorpion Sting Management, 2023.

How to Answer:

Start with the main pathophysiologic difference → then compare features systematically under headings (urine, protein loss, edema, BP, cause).

Model Answer (Table Format)

💡 Tip (Clue):
“Nephritic = inflammation & RBC; Nephrotic = permeability & protein.”

📘 Reference:
Harrison 22/e, Ch. 142; Brenner & Rector’s Nephrology 11/e

Model Answer (Structured & Impressive)

“Sir, during my emergency duties, I have managed multiple acute cases. I would like to briefly describe five of them that reflect both my clinical and team-handling skills:”

1️⃣ Myocardial Infarction (MI)

• Presentation: 55-year-old male with retrosternal chest pain and sweating.
• Action Taken: ABC stabilization, ECG done (ST elevation in II, III, aVF). Given aspirin, clopidogrel, statin, nitrate, started O₂ and IV access, arranged urgent cardiology referral.
• Learning: Importance of early ECG and teamwork for rapid thrombolysis.

2️⃣ Diabetic Ketoacidosis (DKA)

• Presentation: 30-year-old female with vomiting, dehydration, Kussmaul breathing.
• Action Taken: ABC stabilization, bedside sugar >400 mg/dL, started IV fluids → insulin infusion → potassium correction, monitored vitals and urine output.
• Learning: Fluids first, insulin second — and never forget potassium.

3️⃣ Road Traffic Accident (Polytrauma)

• Presentation: Unconscious male, bleeding from scalp, open tibial fracture.
• Action Taken: Followed ABCDE trauma protocol, controlled bleeding, immobilized limb, ensured airway with jaw thrust, stabilized vitals, arranged urgent CT and ortho + neuro consult.
• Learning: Importance of team coordination and prioritizing airway in polytrauma.

4️⃣ Acute Severe Asthma Attack

• Presentation: 25-year-old female with breathlessness, accessory muscle use, SpO₂ 84%.
• Action Taken: O₂, nebulized salbutamol + ipratropium, IV hydrocortisone, ABG done, improved after 30 mins.
• Learning: Timely bronchodilator + steroids save lives.

5️⃣ Organophosphate Poisoning

• Presentation: 40-year-old farmer with frothing, pinpoint pupils, bradycardia.
• Action Taken: Airway secured, atropine + pralidoxime, gastric lavage, monitored vitals.
• Learning: Early atropine and airway management are lifesaving.

💡 Tip (Clue):
“Always describe real cases in ABCDE sequence — it shows calmness and systematic thinking.”

📘 Reference:
ATLS 10/e; Harrison 22/e Ch. 1 (Emergency Medicine).

🔹 1️⃣ Life-Threatening Causes (must rule out first)

👉 Cardiac:

• Myocardial infarction / Unstable angina – retrosternal, radiating to arm/jaw, with sweating
• Aortic dissection – tearing pain radiating to back, pulse inequality, widened mediastinum

👉 Respiratory:

• Pulmonary embolism (PE) – pleuritic pain, dyspnea, tachycardia, risk factors for DVT
• Tension pneumothorax – sudden dyspnea, unilateral absent breath sounds, hypotension

👉 Gastro-esophageal rupture (Boerhaave’s) – post-vomiting, severe retrosternal pain, subcutaneous emphysema

🔹 2️⃣ Cardiac / Pericardial Causes

• Pericarditis – sharp, pleuritic, relieved by sitting forward
• Myocarditis – chest discomfort with fever/myalgia

🔹 3️⃣ Pulmonary Causes

• Pneumonia / pleurisy – fever, localized pain, crackles
• Bronchitis – dull retrosternal burning

🔹 4️⃣ Gastro-esophageal & Musculoskeletal Causes

• GERD / Esophageal spasm – retrosternal burning, post-meal
• Costochondritis / muscle strain – localized, reproducible on palpation

Approach (ABCDE + ECG-based):

A → Airway & breathing assessment
B → ECG + Troponin to rule out MI
C → Chest X-ray for pneumothorax or pneumonia
D → D-dimer if PE suspected
E → Esophageal / GI causes if cardiac ruled out

💡 Tip (Clue):
“Chest pain → Rule out 4 killers first: MI, PE, Aortic dissection, Pneumothorax.”

📘 Reference: Harrison 22/e, Ch. 243; Braunwald’s Cardiology, 12/e.

How to answer:
MONA–BASH → Reperfusion.

Model Answer:
1️⃣ Immediate:

• Morphine (pain), Oxygen, Nitroglycerin, Aspirin 325 mg chewable.
  2️⃣ Reperfusion:
• PCI preferred (within 90 min).
• Thrombolysis (Tenecteplase/Alteplase) if PCI unavailable < 12 h.
  3️⃣ Adjuncts:
• Beta-blocker (if no shock), ACE inhibitor, Statin, Heparin.
  4️⃣ Long-term:
• Dual antiplatelet (1 yr), statin, risk-factor control.

Tip (Clue): “Time = muscle; PCI within 90 min saves heart.”

Because NSTEMI (Non-ST Elevation Myocardial Infarction) is not caused by complete coronary occlusion, hence thrombolysis offers no benefit and may cause harm due to bleeding risk.

MX of STEMI

Management Approach in NSTEMI:

• Antiplatelets: Aspirin + Clopidogrel
• Anticoagulant: Enoxaparin or Heparin
• Anti-ischemic: Nitrates, β-blockers
• High-intensity statin
• Early invasive evaluation → Coronary angiography ± PCI if indicated

Heart attack (Myocardial infarction): Ischaemic necrosis of myocardium due to acute coronary artery occlusion — presents with chest pain, ECG changes, raised troponin.
• Cardiac arrest: Sudden cessation of cardiac mechanical activity (no pulse) — patient unresponsive, no breathing. Can be caused by VF/VT secondary to MI (so MI may lead to cardiac arrest).
• Key: MI = disease process; cardiac arrest = consequence (loss of circulation) requiring immediate CPR/defibrillation.

Tip (Clue): “Heart attack can cause cardiac arrest — but not vice versa.”

Tip (Clue): “Emergency = End-organ damage.”

Confirm diagnosis → classify → treat stepwise.

Model Answer:
Diagnosis:

• Average of ≥2 readings on ≥2 visits.
• Normal: <120/80 mmHg
• Elevated: 120–129/<80
• Stage 1: 130–139 / 80–89
• Stage 2: ≥140 / ≥90

Management:
1️⃣ Lifestyle: ↓ salt (<5 g/day), exercise 150 min/week, no smoking.
2️⃣ Drugs (Step 1): ACE inhibitor / ARB / CCB / Thiazide.
3️⃣ If uncontrolled: Combination (2–3 drugs).
4️⃣ Monitor: Target BP <130/80 mmHg.

Tip (Clue): “Diagnose slow — lower slow; never crash BP.”

Definition:
Antibiotic resistance is the ability of bacteria to survive and multiply despite the presence of an antibiotic that was previously effective against them.

Mechanism (short):
🔹 Mutation in bacterial genes
🔹 Horizontal gene transfer (plasmids)
🔹 Overuse and misuse of antibiotics → selection pressure → resistant strains (e.g., MRSA, NDM-1).

Consequences:
➡️ Longer illness duration
➡️ Increased hospital stay & cost
➡️ Higher morbidity and mortality
➡️ Failure of standard treatments

Prevention Strategies (4 Key Levels):

1️⃣ Prescriber level:

• Use antibiotics only when indicated (bacterial infection, not viral).
• Follow antibiotic stewardship protocols.
• Prefer narrow-spectrum agents when possible.
• Avoid empirical use without culture/sensitivity.

2️⃣ Patient level:

• Complete full course; do not self-medicate.
• Avoid using leftover or shared antibiotics.

3️⃣ Hospital level:

• Strict infection control (hand hygiene, isolation of resistant cases).
• Antibiotic policy and periodic audits.

4️⃣ National & Global level:

• Surveillance programs (e.g., ICMR-AMRSN, WHO GLASS).
• Public awareness campaigns.
• Regulation of over-the-counter antibiotic sales.

💡 Tip (Clue):
“Use antibiotics like fire — powerful when controlled, disastrous when misused.”

📘 Reference:
Harrison 22/e, Ch. 128; WHO Global Action Plan on AMR, 2023.

Respiratory Emergencies

Differentiate on onset, reversibility, inflammation, and therapy.

Diagnosis:
• Asthma: Variable respiratory symptoms (wheeze, dyspnea), reversibility on bronchodilator testing (>12% and 200 mL FEV1 improvement), atopy history common, younger onset.
• COPD: Persistent progressive dyspnea, chronic productive cough, smoking history, non-fully reversible airflow limitation on spirometry (post-bronchodilator FEV1/FVC <0.7).

Key: Reversibility/severity & smoking history differentiate;

ICS = core for asthma,

 Bronchodilators + Lifestyle (smoking cessation) core for COPD.

Tip (Clue): “Asthma → variable reversible airflow limitation; COPD → fixed obstructive pattern.”

Assess severity: Inability to speak, RR > 30, PEF < 50 %, SpO₂ < 90 %.
Immediate steps:
1️⃣ O₂ to maintain SpO₂ > 94 %.
2️⃣ Nebulized Salbutamol + Ipratropium q20 min × 3.
3️⃣ IV Hydrocortisone 100 mg or Oral Prednisolone 40 mg.
4️⃣ If no response → IV Magnesium sulfate 2 g over 20 min.
5️⃣ Intubate if exhausted / rising CO₂.

Tip (Clue): “O₂ + SABA + Steroid = core triad for acute asthma.”

Recognize trigger → stabilize → support ventilation.

Model Answer:

• Diagnosis: ↑ Dyspnea / sputum volume / purulence.
• Management:
  • O₂ (low-flow) to keep SpO₂ 88–92 %.
  • Nebulized SABA + SAMA (every 20 min × 3).
  • IV Hydrocortisone 100 mg 8-hourly → Oral Prednisolone 40 mg 5 days.
  • Antibiotic if purulent sputum (Azithro / Amoxy-Clav).
  • NIV (BiPAP) if pH < 7.35 / PaCO₂ > 45.

Tip (Clue): “Target SpO₂ ≈ 90 % — too much O₂ can worsen CO₂ retention.”

Clinical + CXR + Empiric therapy per guidelines.

Model Answer:

• Diagnosis: Fever, cough, pleuritic pain + CXR infiltrate.
• Severity: CURB-65 ≥ 2 → admit.
• Treatment:
  • OPD: Amoxy-Clav + Azithromycin (5 days).
  • IPD: IV Ceftriaxone + Azithromycin or Levofloxacin.
  • Add O₂, fluids, antipyretic.

Tip (Clue): “Start antibiotic within 4 h of diagnosis.”

Empirical therapy means starting treatment based on the most likely cause of a disease before the exact diagnosis or organism is confirmed by investigations.

Importance = In life-threatening or rapidly progressive infections, waiting for lab results may delay life-saving therapy.

Eg ;- Nitrofurantoin in UTI

Cefixime in typhoid .

Definition (Berlin criteria) → supportive care.

Model Answer:
Definition (Berlin 2012): Acute onset (< 1 wk) bilateral opacities not due to cardiac failure + PaO₂/FiO₂ < 300.

Management:

• Low tidal volume ventilation (6 mL/kg IBW).
• PEEP optimization to maintain oxygenation.
• Prone positioning if PaO₂/FiO₂ < 150.
• Fluids: Conservative strategy.
• Treat underlying cause.

Tip (Clue): “ARDS = O₂ support + low VT + prone ventilation.”

• Need for ICU & oxygen capacity building.
• Importance of indigenous vaccine development (Covaxin/Covishield).
• Role of digital health (CoWIN, tele-consultation).
• Public awareness & infodemic control.
• Strengthening primary care and epidemic preparedness (IDSP).

Tip (Clue): “COVID → taught preparedness, digital health & self-reliance.”

Neurology & Cardiorespiratory Emergencies

Differentiate ischemic vs hemorrhagic; stress early imaging.

Model Answer:

• Diagnosis: CT brain (to rule out bleed).
• Ischemic stroke:
  • IV Alteplase (tPA) 0.9 mg/kg if within 4.5 hours.
  • Control BP (<185/110), antiplatelet (Aspirin 150 mg), statin.
• Hemorrhagic stroke:
  • Control BP (<140), reverse anticoagulants, neurosurgical consult.
• Rehabilitation: Physiotherapy + speech therapy.

Tip (Clue): “CT first — then treat; time = brain.”

Core Concept:

Early brain imaging (preferably Non-Contrast CT scan) is the single most critical step in stroke evaluation — because treatment depends entirely on the stroke type.

🔹 Reason 1: To Differentiate Stroke Type

• Ischemic Stroke → due to arterial occlusion → Thrombolysis indicated.
• Hemorrhagic Stroke → due to vessel rupture → Thrombolysis contraindicated.
  ⮕ Both can look similar clinically, so imaging is mandatory before treatment.

🧠 Without CT/MRI, you can’t safely start thrombolysis.

🔹 Reason 2: Time-Sensitive Thrombolysis

• Thrombolytic therapy (e.g., Alteplase, Tenecteplase) must be given within 4.5 hours of symptom onset.
• Early imaging saves time, confirming ischemic stroke and allowing timely reperfusion.
  ⮕ “Time is Brain” — each minute of delay = neuronal loss.

🔹 Reason 3: To Detect Mimics or Complications

• Mimics: hypoglycemia, seizures, migraine, tumors.
• Complications: early edema, mass effect, hemorrhagic transformation.

⮕ Imaging helps avoid wrong treatment and plan surgical management if bleeding is present.

💙 Summary

Stroke symptoms → Immediate CT brain (within 20 min) →
➡️ Ischemic → Thrombolysis (if <4.5 hr) + Antiplatelets later
➡️ Hemorrhagic → Stop anticoagulants, control BP, neurosurgical opinion

💙 Tip:

“Treat stroke with your clock and your scan — not your guess.”

ABCDE → drug escalation → identify cause.

Model Answer:

• Airway, O₂, IV access, glucose (rule out hypoglycemia).
• Step 1: Lorazepam 4 mg IV (repeat after 10 min).
• Step 2: Phenytoin 20 mg/kg IV (max 50 mg/min) or Valproate.
• Step 3: If persistent → IV Midazolam / Propofol (ICU).
• Identify cause: infection, metabolic, stroke, drug withdrawal.

Tip (Clue): “Stop seizure fast — brain injury starts within 5 min.”

Early antibiotics before LP if unstable.

Model Answer:

• Suspect: Fever, neck rigidity, altered sensorium.
• Investigate: CBC, LP (↑ cells, ↓ sugar, ↑ protein).
• Empiric treatment:
  • Adults: Ceftriaxone + Vancomycin ± Dexamethasone.
  • >50 yr / immunocompromised: add Ampicillin (Listeria).
• Supportive: IV fluids, anticonvulsants if seizures.

Tip (Clue): “If suspect meningitis → antibiotics first, LP next.”

Diagnosis → classification → regimen.

Model Answer:
Diagnosis: CBNAAT / TrueNat + Chest X-ray + Sputum AFB.
Regimen (Drug-sensitive):

• Intensive phase: HRZE × 2 months
• Continuation: HRE × 4 months
  (Weight-band based FDCs under NTEP.)
  Follow-up: Sputum at 2, 4, 6 months.
  Support: Nutritional support (₹1000/month under Nikshay Poshan Yojana).

Tip (Clue): “CBNAAT before ATT — never treat blindly.”

Goal

To eliminate TB from India by 2025 (5 years ahead of the global SDG target of 2030).

🔹 Vision

“TB Mukt Bharat” — Zero deaths, disease, and poverty due to TB.

🔹 Strategy — DTPB

D → Detect early → Use CBNAAT/TrueNat, chest X-ray for all suspected cases.
T → Treat effectively → All-oral short regimens (BPaLM/BPaL).
P → Prevent → TB Preventive Therapy (TPT) for household contacts; infection control.
B → Build → Digital surveillance (Nikshay), private sector linkages, community participation.

🔹 Recent Highlights (2025)

• Services expanded to Ayushman Arogya Mandirs.
• Nikshay Mitras under PM TB Mukt Bharat Abhiyan for patient support.
• Nutrition aid via Nikshay Poshan Yojana (₹1000/month).
• Record case notifications: >26 lakh (2024) — highest ever.

🔹 Challenges

• Persistent undernutrition, MDR-TB, and late diagnosis.
• Social stigma and private sector underreporting.

💙 Tip:

“Detect early, Treat completely, Prevent spread — that’s the NTEP 2025 mantra.”

Always do 15 min wash under tap water with soap.
classify category and manage as per category.

lyssa Virus type 1 most specific ^{Q ** UPSC CMS 2024 **  CMS 2021 ****2019 & 2016 & 2002}

Wash is initial step and very important step for all type of Category (15 -20 min with soap + water) and

So basically, RIG is only for category 3 and ARV for cat 2 & 3 ^{Q mcq faqs}

RIG is good if given within 72 hour . However can be given till 7 days and very less effective if given after 7 days . So if patient come after 7 days as category 3 then we should not give RIG. ^{Q imp for CMS 2024 & 2025}

prefer Thai regimn

Rabies – Key Symptoms (Ultra-Short)

• Incubation: 1–3 months
• Early: Fever, malaise, tingling at bite site
• Neurologic:
  • Furious type: Hydrophobia, aerophobia, agitation
  • Paralytic type: Ascending paralysis
• Late: Coma → Respiratory failure → Death

💙 Tip: Hydrophobia = hallmark of rabies.

  Tetanus

 ^***Very important for UPSC CMS^{*** 2020 & 2016 & 2009 & 2018 &}

Clostridium Tetani (spore is also features of this bacteria)

SPORE can be killed by Gamma Radiation ^{Q CMS 2017}

MOA- potent exotoxin – Tetanospasmin & Tetanolysin ^Q

Soil is Source of infection  & reservoir at the same time ^{Q **UPSC CMS 2023**}

Direct inoculation is route of transmission

TIG dose: 250 IU IM (500 IU if major wound).

Tip (Clue): “TT for everyone; TIG if incomplete + dirty wound.”

• Incubation: 3–21 days (shorter = severe).
• Early: Jaw stiffness (trismus / lockjaw), neck rigidity.
• Later: Painful muscle spasms, risus sardonicus (grin), opisthotonus.
• Severe: Laryngospasm → respiratory failure → death.

💙 Tip: Trismus + history of wound = Tetanus until proved otherwise.

First aid → assess → specific therapy.

Model Answer:

• Do NOT: Cut, suck, or apply tourniquet.
• Immobilize limb at heart level.
• Identify snake type (neurotoxic, hemotoxic, myotoxic).
• Supportive: Airway, O₂, fluids.
• Antivenom (ASV):
  • Indication: Local swelling, neuro signs, coagulopathy.
  • Dose: 10 vials IV over 1 hr → repeat till symptoms resolve.
• Neurotoxic: Give neostigmine + atropine if indicated.

Tip (Clue): “Immobilize, transport, give ASV — nothing else.”

Must know

1️⃣ Non-Poisonous Snakes

• Rat snake, Python

🔹 2️⃣ Poisonous Snakes

(a) Elapidae → Neurotoxic → Cobra, Krait
(b) Viperidae → Vasculotoxic → Russell’s viper, Saw-scaled viper
(c) Hydrophidae → Myotoxic → Sea snakes

💙 Tip: Cobra = Neurotoxic, Viper = Hemotoxic, Sea snake = Myotoxic.

Supportive → antidotes → monitoring.

Model Answer:
Clinical triad: Miosis, salivation, fasciculations.
Treatment:
1️⃣ Decontaminate: Remove clothes, wash skin.
2️⃣ Airway + O₂.
3️⃣ Atropine: 2 mg IV q5 min till secretions dry, pupils dilate.
4️⃣ Pralidoxime: 30 mg/kg IV over 30 min → 8–10 mg/kg/hr infusion.
5️⃣ Supportive: Fluids, suction, monitor ECG.

Tip (Clue): “Atropine till lungs dry — not till heart rate normal.”

Definition → classification → management.

Model Answer:
Definition: Hb < 13 g/dL (male), < 12 g/dL (female).

Anemia classification ^{Q Q Q Q}

How to differentiate Microcytic ^{Q Q Q Q}

Now concept

Sideroblastic is opposed to IDA —-ok.

AOCD is same as IDA except ferritin & TIBC.

Free Erythrocyte protoporphyrin increases in all except thalassemia.

Treatment:

• Iron: Ferrous sulfate 100–200 mg elemental iron/day × 3 months after correction.
• Treat cause (worm, malnutrition, menorrhagia).
• Transfuse if Hb < 7 g/dL / symptomatic.

Tip (Clue): “Always correct cause + replenish stores.”

Reference Pg no 252 (Target CMS 2025 RR)

Endocrinology

How to answer:
List all four diagnostic pathways.

Model Answer:
Diagnosis made if any one of the following is present (confirmed on repeat if asymptomatic):

Tip (Clue): “126–200–6.5–200 → FPG, OGTT, A1c, Random.”

Lifestyle → Pharmacotherapy → Monitoring → Complications.

Model Answer:
1️⃣ Lifestyle: Diet (low GI, high fiber), exercise ≥ 150 min/week, weight loss 5–10 %.
2️⃣ Drugs:
 - 1st line: Metformin (unless contraindicated).
 - Add-on (based on comorbidity):
  • ASCVD → SGLT2 inh. (Empagliflozin) or GLP-1 RA (Semaglutide)
  • HF/CKD → SGLT2 inh.
  • Obesity → GLP-1 RA.
3️⃣ Monitoring: FPG, PPG, HbA1c every 3 months.
4️⃣ Prevent complications: BP control (<130/80), statin, annual eye/foot/kidney check.

Tip (Clue): “Metformin first — then match drug to comorbidity.”

INSULIN type

 ^**UPS INSULIN type  

 ^{**UPSC CMS 2023** 2022 & 2020 & 2019 & 2017}

Page no 222 Target CMS 2025 RR

Symptoms of hyperglycemia (polyuria, polydipsia, and polyphagia for the last 3 months) ^{cms 2023} + random blood glucose ≥ 200 mg/dL is diagnostic of diabetes mellitus, without requiring further tests.

Diagnostic Triad of DKA ^{Q CMS 2025}

• Hyperglycemia
• Ketosis
• Metabolic acidosis (↓ serum bicarbonate, ↓ pH)

🩺 DKA Management – Stepwise Approach (Harrison 22nd Ed.)

1️⃣ Fluid Resuscitation

• Initial fluid: Start with 0.9% Normal Saline (NS) at 15–20 mL/kg/hr (~1–1.5 L in first hour)
• Switch to 0.45% NS if corrected serum sodium is normal or elevated

2️⃣ Potassium Replacement

• Check serum K⁺ before insulin:
  • If K⁺ < 3.3 mEq/L → hold insulin, give K⁺ until >3.3
  • If K⁺ 3.3–5.0 mEq/L → add 20–30 mEq K⁺ per liter of IV fluid
  • If K⁺ > 5.0 mEq/L → monitor closely, no immediate replacement

3️⃣ Insulin Therapy

• Start after initial fluid resuscitation and K⁺ > 3.3
• IV regular insulin:
  • Bolus: 0.1 units/kg (optional)
  • Infusion: 0.1 units/kg/hr
• Goal: Reduce glucose by 50–70 mg/dL/hr
• When glucose reaches 200 mg/dL, reduce insulin rate to 0.02–0.05 units/kg/hr and add Dextrose (D5W) to fluids

4️⃣ Correction of Acidosis

• Insulin alone usually corrects acidosis
• Bicarbonate therapy:
  • Reserved for pH < 6.9
  • Dose: 100 mmol in 400 mL sterile water + 20 mEq K⁺ over 2 hrs

5️⃣ Phosphate Replacement

• Not routinely required
• Consider if serum phosphate < 1.0 mg/dL, cardiac dysfunction, or respiratory depression

6️⃣ Monitoring

• Hourly: Glucose, electrolytes, venous pH, anion gap
• Every 2–4 hrs: Serum ketones, bicarbonate, creatinine
• Watch for cerebral edema, especially in children

📌 End Goals of Therapy

• Closure of anion gap
• Normalization of bicarbonate and pH
• Resolution of ketonemia

Tip (Clue): “Acidotic DKA — Dehydrated HHS.”

Model Answer:

• Definition: Plasma glucose < 70 mg/dL.
• Symptoms: Sweating, tremor, palpitation, confusion.
• Treatment: If conscious → 15 g oral glucose; if unconscious → IV 25–50 mL of D50 or IM Glucagon 1 mg.
• Prevent: Regular meals, dose adjustment, patient education.

Tip (Clue): “Rule of 15 — 15 g glucose → recheck 15 min → repeat if < 70.”

Clinical: Fatigue, weight gain, constipation, cold intolerance, bradycardia, dry skin.
Investigations: ↑ TSH + ↓ Free T₄.
Management: Levothyroxine 1.6 µg/kg/day (morning empty stomach).
Adjust dose by TSH every 6 weeks.

Tip (Clue): “Primary = ↑ TSH ↓ T₄; Central = ↓ TSH ↓ T₄.”

Tip (Clue): “Opposite spectrums — energy low vs high.”

Define → list types → classify by transmission and chronicity.

Model Answer:
Viral hepatitis = inflammation of liver due to hepatotropic viruses (A, B, C, D, E).

Tip (Clue): “A & E → enteral ; B C D → parenteral.”

Mcc outbreak in india = A ^{UPSC CMS 2020**}

Most chronic  C ^Q

↑ mortality in pregnancy = E ^{**UPSC CMS 2021**}

All are RNA except hepatitis B ( DNA virus)

List key antigens / antibodies with meaning.

Model Answer:

Tip (Clue): “Window period = only Anti-HBc IgM positive.”

• Acute inf = HBsAg (+) & IgM Anti-HBcAg

Supportive → monitoring → when to refer.

Model Answer:

• Rest + nutrition (high-carb, low-fat diet)
• Avoid hepatotoxins – alcohol, paracetamol
• Monitor LFT, INR, bilirubin
• Treat complications:
  • Encephalopathy → lactulose + rifaximin
  • Coagulopathy → vit K, FFP
• Refer if: jaundice > 4 weeks, INR > 1.5, altered sensorium.

Tip (Clue): “Supportive = mainstay; only HBV/HCV may need antivirals.”

Cirrhosis = diffuse hepatic fibrosis with regenerative nodules causing portal hypertension & liver failure.

Complications: Ascites, variceal bleed, encephalopathy, HCC.
Management:
1️⃣ Etiologic – stop alcohol, treat HBV/HCV.
2️⃣ Diet – protein 1 g/kg (restrict if encephalopathy).
3️⃣ Ascites – salt restriction + spironolactone ± furosemide.
4️⃣ Varices – propranolol, endoscopic banding.
5️⃣ Encephalopathy – lactulose, rifaximin.
6️⃣ HCC screening – USG + AFP every 6 months.

Tip (Clue): “Cirrhosis = treat cause + prevent complications + consider transplant.”

Diagnosis → graded management.

Model Answer:

• Confirm: Shifting dullness, USG.
• Restrict salt < 2 g Na/day.
• Diuretics: Spironolactone 100 mg ± Furosemide 40 mg (ratio 100:40).
• Therapeutic paracentesis: Remove ≤ 5 L with albumin 6–8 g/L removed.
• Refractory: TIPS / Transplant.

Tip (Clue): “Spironolactone = drug of choice for cirrhotic ascites.”

Supportive → specific → monitor.

Model Answer:

• NPO, aggressive IV fluids (Ringer’s lactate).
• Analgesia: Tramadol / Fentanyl.
• O₂ / monitor urine output.
• If severe (BISAP ≥ 3): ICU care.
• No routine antibiotics unless infected necrosis.
• ET feeding within 48 h preferred.
• Treat cause: gallstones → cholecystectomy; alcohol → abstain.

Tip (Clue): “Early fluid + nutrition = survival.”

Resuscitate → identify → definitive treatment.

Model Answer:

• Airway, 2 IV lines, fluids, cross-match.
• Investigate: Hb, LFT, INR, Urea, Endoscopy.
• Specific:
  • Peptic ulcer: PPI infusion + endoscopic therapy.
  • Variceal bleed: Octreotide infusion + band ligation + antibiotics + TIPS if refractory.
• Transfuse PRBC if Hb < 7 g/dL.

Tip (Clue): “2 IV lines, O₂, NG tube, PPI before endoscopy.”

State triple therapy + adjuncts.

Model Answer:

• General: Stop NSAIDs, avoid smoking/alcohol.
• Drugs:
  • H. pylori triple therapy (14 days):
    PPI + Clarithromycin + Amoxicillin (or Metronidazole).
  • Maintenance: PPI 4–6 weeks.
• Complications: bleed, perforation, gastric outlet obstruction → surgical referral.

Tip (Clue): “Treat H. pylori = cure PUD.”

How to answer:
Mention diagnosis → drainage → cause-specific therapy.

Model Answer:

• Diagnosis: Chest X-ray (blunting of costophrenic angle) → USG → Pleural tapping for analysis (protein, LDH, cell count, ADA).
• Classification: Transudate vs Exudate (Light’s criteria).
• Treatment:
  • Transudate: Treat underlying cause (HF, nephrotic syndrome).
  • Exudate: Antibiotics for empyema, ATT for TB, malignant drainage if needed.

Tip (Clue): Don’t remove > 1.5 L fluid at once → re-expansion edema risk.

Pleural effusion-Light’s criteria

^{** UPSC CMS 2024 **  **cms 2022** & 2018 & 2021 & 2016 & 2004 & 2006}

One liner mCQs

Pleural effusion with LOW GLUCOSE seen in RA ^{**UPSC CMS 2009**}

SAAG > 1.1  = Transudate ascites e.g. PORTAL HTN ^{**UPSC CMS 2019** & 2014 & 2009}

SAAG < 1.1 = Exudate ascites ^{** UPSC CMS 2024 **}

How to answer:
Confirm diagnosis → classify → treat stepwise.

Model Answer:
Diagnosis:

• Average of ≥2 readings on ≥2 visits.
• Normal: <120/80 mmHg
• Elevated: 120–129/<80
• Stage 1: 130–139 / 80–89
• Stage 2: ≥140 / ≥90

Management:
1️⃣ Lifestyle: ↓ salt (<5 g/day), exercise 150 min/week, no smoking.
2️⃣ Drugs (Step 1): ACE inhibitor / ARB / CCB / Thiazide.
3️⃣ If uncontrolled: Combination (2–3 drugs).
4️⃣ Monitor: Target BP <130/80 mmHg.

Tip (Clue): “Diagnose slow — lower slow; never crash BP.”

Tip (Clue): “Emergency = End-organ damage.”

Why examiner asks:
Checks ability to recall reversible causes.

How to answer:
Group under renal, endocrine, vascular and drug causes.

Model Answer:

• Renal: CKD, renal artery stenosis, glomerulonephritis
• Endocrine: Primary aldosteronism, Cushing’s syndrome, Pheochromocytoma, Thyroid disorders
• Vascular: Coarctation of aorta
• Drugs: OCPs, NSAIDs, Steroids, Cyclosporine
• Sleep disorders: Obstructive sleep apnea

Tip (Clue): Remember “ABCD” – Aldosteronism, Bruits (Renal), Cushing’s/Catecholamines, Drugs.

Quote DASH diet + weight loss + exercise.

Model Answer:

• Weight reduction: 5–10 % loss → ↓ SBP 5–20 mm Hg
• Dietary DASH pattern: Fruits, vegetables, low-fat dairy, ↓ salt < 5 g/day
• Exercise: ≥ 30 min brisk walk 5 days/week
• Avoid: Alcohol, smoking, high-sodium processed food
• Stress control: Yoga/meditation

Tip (Clue): Each 10 kg weight loss ≈ 5–10 mm Hg BP drop.

How to answer:
Mention five major groups + example + first-line principle.

Model Answer:

1. Thiazide diuretics – Hydrochlorothiazide, Chlorthalidone
2. ACE inhibitors – Enalapril, Ramipril
3. ARBs – Losartan, Telmisartan
4. Calcium channel blockers – Amlodipine, Diltiazem
5. Beta blockers – Atenolol, Metoprolol (for specific indications)

Combination therapy if BP > 160/100 mm Hg or uncontrolled after one agent.

Tip (Clue): First-line = ACE/ARB + CCB ± Thiazide.

How to answer:
List 3–4 important effects and specific contraindications.

Model Answer:

• Side effects: Bradycardia, fatigue, cold extremities, bronchospasm, hypoglycemia masking.
• Contraindications: Asthma/COPD, bradyarrhythmia, heart block, acute HF, variant angina.

Tip (Clue): Avoid non-selective β-blockers in bronchial asthma.

How to answer:
Divide by site (atrial, junctional, ventricular) and rate.

Model Answer:

• Bradyarrhythmias: Sinus bradycardia, AV blocks.
• Tachyarrhythmias:
  • Supraventricular: AF, Atrial flutter, PSVT
  • Ventricular: VT, VF, Torsades de pointes.

Tip (Clue): Think “Rate ↑ or ↓ + Origin A/V.”

How to answer:
Classify as cardiac and systemic.

Model Answer:

• Cardiac: Hypertension, Rheumatic MS, IHD, Cardiomyopathy, Post-CABG.
• Systemic: Thyrotoxicosis, Alcohol intake, PE, Sepsis, Electrolyte imbalance.

Tip (Clue): “HTN + MS = most common duo for AF in India.”

How to answer:
Mention structural, electrical, toxic, and hereditary causes → investigate → prevent recurrence.

Model Answer:

• Causes: HOCM, Long QT syndrome, Brugada syndrome, Myocarditis, Drugs (cocaine, amphetamines).
• Evaluation: Family history, ECG, Echocardiography, Cardiac MRI, Genetic testing.
• Prevention: Beta-blockers, ICD implantation in high-risk.

Tip (Clue): In young = think channelopathies > atherosclerosis.