Q: History taking in practical exam A: I can see this is an indoor assessment sheet for a patient with organophosphate OP poisoning. Let me read the medical library skill first, then provide a thorough analysis. A: Now let me search the medical library for OP poisoning and history taking content in parallel: A: I now have all the information needed to provide a thorough analysis of this case. Here is a complete breakdown of the history and clinical details from the assessment sheet, along with what you need to know for your practical exam. --- Indoor Assessment Sheet - Case Analysis Patient Demographics Field Detail ------ Name Bichitra Kumar Sahoo Age 36 years Sex Male Ward PICU Date of Admission 8/6/26, Time: 15:27 --- 1. Chief Complaints A/H/O of OP Organophosphate insecticide consumption - 30% Dimethoate - 100 mL - Consumed at 9:00 AM in his home - No h/o alcohol consumption - H/b 2 episodes of vomiting - Gastric lavage done pre-hospital or at casualty --- 2. H/O Present Illness Not filled in separately - the Chief Complaints section effectively captures this --- 3. H/O Past Illness - K/c/o T2DM on OHA Oral Hypoglycemic Agents - metformin + glimepiride seen in Treatment History section --- 4. Family History - Not significant circled negative --- 5. Personal / Menstrual History - Not documented --- 6. Treatment History - On OHAs - T-Metformin + Glimepiride 1 tablet daily --- 7. H/O Allergy - Not documented --- 8. General Physical Examination Parameter Finding ------ Pallor Present + Icterus Absent - Cyanosis Absent - Edema Absent - Clubbing Present + Koilonychia Absent - Pulse 100 bpm BP 120/70 mmHg RR 16 cpm Temp Not recorded --- 9. Systemic Examination - CNS: Patient is conscious, cooperative, and oriented to T/P/P time, place, person - RS: B/L crepitations +, no added sounds - P/A: Soft, epigastric tenderness + --- 10. Local Examination CNS - S1, S2 normal --- 12. Provisional Diagnosis OP Poisoning case - 30% Dimethoate, 100 mL + T2DM --- 13. Blood Investigations Advised - CBC, FBS, PPBS - LFT, KFT - Urine R/ME, C/S - HbA1c, Serum Cholinesterase under "Any other investigation advice" --- Clinical Commentary for Your Exam Why This Case Matters Dimethoate is a 30% organophosphate OP compound. OP compounds inhibit acetylcholinesterase AChE, causing accumulation of acetylcholine at synapses. This produces a cholinergic toxidrome with three categories of features: SLUDGE/DUMBELS - Muscarinic features - Salivation, Lacrimation, Urination, Defecation, GI distress, Emesis - Miosis, bronchospasm, bradycardia Nicotinic features NMJ and autonomic ganglia - Muscle weakness/fasciculations, tachycardia, hypertension CNS features - Confusion, seizures, coma, respiratory depression Key Points for History Taking Exam Focus 1. What, How Much, When: - Agent: 30% Dimethoate correctly documented - Amount: 100 mL correctly documented - Time: 9:00 AM correctly documented - important for calculating time-to-treatment gap 2. Route: Oral ingestion most common in agricultural/suicidal OP poisoning 3. Circumstances: At home - important to assess suicidal intent vs. accidental exposure 4. Alcohol co-ingestion: Explicitly documented as "No" - alcohol potentiates OP toxicity 5. Gastric lavage: Already done - documented correctly 6. Past history of T2DM on OHA is relevant because: - Glimepiride sulfonylurea can cause hypoglycemia - Dimethoate + glimepiride combo makes blood glucose monitoring critical - HbA1c and FBS/PPBS are appropriately ordered Key Investigations - Why Serum Cholinesterase? Diagnosis of OP poisoning is confirmed by: - History of exposure documented here - Signs/symptoms of cholinergic excess - Serum pseudocholinesterase butyrylcholinesterase - easier to measure, falls early - Erythrocyte AChE - more specific, reflects severity The sheet correctly orders Serum Cholinesterase under additional investigations. What Was Missing / Could Be Improved For a complete history in your exam, you should also document: - Suicidal ideation / intent was this deliberate self-harm? - Psychiatric history - very relevant in suicide attempts - Occupation blank on this sheet - important for OP exposure risk - Personal history diet, sleep, bowel/bladder habits, substance use - documented only partially - Socioeconomic history - Exact symptoms timeline after ingestion before arrival e.g., when vomiting started, any seizures, miosis, excessive secretions - Neurological symptoms at onset miosis, excessive salivation, lacrimation --- Summary for your exam: This is a 36-year-old male with acute OP Dimethoate 30%, 100 mL poisoning presenting 6+ hours post-ingestion with 2 episodes of vomiting gastric lavage done, known T2DM on OHA. The key exam points are: documenting the cholinergic toxidrome symptoms, serum cholinesterase as the confirmatory test, atropine as the antidote titrated to drying of secretions, and pralidoxime 2-PAM as the AChE reactivator that must be given early before "aging" of the phosphorylated enzyme occurs. - Henry's Clinical Diagnosis and Management by Laboratory Methods - Organophosphates and Carbamates section - Adams and Victor's Principles of Neurology, 12th ed. - Phosphorus and Organophosphate Poisoning
