Medical MCQ-A patient undergoing caesarean section following prolonged labour under subarachnoid block developed carpopedal spasm. Lignocain was used as anesthetic agent. The most likely diagnosis is:

A patient undergoing caesarean section following prolonged labour under subarachnoid block developed carpopedal spasm. Lignocain was used as anesthetic agent. The most likely diagnosis is:

Amniotic fluid embolism

Lignocaine toxicity

Hypocalcemia

Hypokalemia

Question Category:

Anaesthesia

Correct Answer:

Hypocalcemia

Description:

Pain due to prolonged labour may lead to hyperventilation and resultant respiratory alkalosis. This will cause a decrease in the level of free ionized calcium in the ECF, resulting in hypocalcemia and precipitating carpopedal spasm. Ref: Primer on The Metabolic Bone Diseases and Disorders of Mineral Metabolism Edited By Clifford J. Rosen, 7th Edition, Page 354 ; Nutrition Therapy and Pathophysiology By Marcia Nahikian Nelms, 2007, Page 196 ; Essentials of Medical Pharmacology By KD Tripathi, 5th Edition, Page 479

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