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ELSEVIER-ANESTHESIA CORRECTLY ANSWERED
Typology: Exams
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B. Pain (C and A-delta), Preganglionic sympathetic (B), motor C. Preganglionic sympathetic (B), sensory, motor, pain (C and A-delta) D. Pain (C and A-delta), sensory, motor - CORRECT ANSWER A. Preganglionic sympathetic (B), pain (C and A-delta), sensory, motor. ∙∙ In functional terms, it is autonomic (mediated by C and B fibers) → Sensory ( mediated by C and A-delta fibers) → Motor ( A-alpha fibers). This is the old concept: NEWER CONCEPT: ∙ Sensitivity to Local Anaesthetic : A gamma & A delta > A alpha & A beta > B > C Miller's Anaesthesia. "Different fiber types are differentially sensitive to local anesthetic blockade. In vivo experiments in which continuous superperfusion of peripheral nerve allows equilibration with drug and experiments in which a drug bolus is delivered by percutaneous injection, analogous to clinical peripheral nerve block, show unequivocally that small myelinated axons (Aγ motor and Aδ sensory fibers) are the most susceptible to impulse annihilation. Next in order of block are the large myelinated (Aα and Aβ) fibers, and the least susceptible are the small, nonmyelinated C fibers. In fact, in this last group, impulses in the slowest conducting population (conduction velocity of 0.5 to 0.8 msec) are the most resistant to local anesthetic.
A. Metabolic acidosis B. Hypertension C. Bradycardia D. Hyperkalemia - CORRECT ANSWER C. Bradycardia
A. Spinal narcotics via intrathecal route B. Intravenous narcotic infusion in lower dosage C. No medication is needed as infant does not feel pain after surgery due to immaturity of nervous system D. Only paracetamol suppository is adequate - CORRECT ANSWER B. Intravenous narcotic infusion in lower dosage AIIMS May 2006
B. Propofol C. Enflurane D. Ketamine - CORRECT ANSWER D. Ketamine Dissociative anaesthesia: ∙ Intense analgesia with only superficial sleep. ∙ EEG evidence of dissociation between thalamus and limbic system Dose: i. 2 mg/kg IV—effect within 60 sec and lasts for 5 to 8 min ii. 5 to 10 mg/kg IM—effective in 3 min and lasts for 20 to 30 min iii. 50 μg/kg/min in continuous infusion
Disadvantages: Highly inflammable and highly explosive. Pungent smelling- Induction is unpleasant Increases tracheobronchial secretion Postoperative nausea and vomitting incidence are higher.
C. Neck flexion D. Emphysema - CORRECT ANSWER C. Neck flexion 58.Which of the following device provides fixed performances oxygen therapy - A. Nasal Cannula B. Venturi mask C. O2 by T - piece D. Edinburg mask - CORRECT ANSWER B. Venturi mask
A. Magnetic Resonance Spectroscopy B. Radio labeled lactate determination C. Direct measurement of end diastolic pressure D. Regional wall of motion abnormality detected with the help of 2D transoesophealechocardiography - CORRECT ANSWER D. Regional wall motion abnormality detected with the help of 2D transesophageal echo
D. Systemic toxicity of local anesthetics - CORRECT ANSWER D. Systemic toxicity of local anesthetics
A. Lignocaine B. Bupivacaine C. Prilocaine D. Lignocaine + ketorolac - CORRECT ANSWER B. Bupivacaine Bupivacaine is not used for Bier block ( IV regional anesthesia).
B. Grey cylinder with white shoulders C. Black cylinders with white shoulders D. Black cylinders with grey shoulders - CORRECT ANSWER C. Black cylinders with white shoulders
∙ BM supression by Nitrous oxide.