Manivannan, Justin, Chezhian, Ganesan, Amalraj Iyadurai, Senthur Rajapandian, Sritharan
Madurai Medical College, Madurai, Tamil Nadu, India
Introduction: Snakebite is an important cause of mortality and morbidity in India. Acute disseminated encephalomyelitis is also reported following treatment with anti snake venom.
Case Vignette: A 45 years old female patient presented with history of snakebite on her left hand. She was treated outside for 5 days with Anti snake venom FFP and referred. On admission she had history of bleeding gums decreased urine outputhemoptysis and hematuria of one day duration. On day - 6 she developed weakness of both lower limbs and on day- 7 she had upper limb weakness and respiratory distress. On examination the patient was conscious. Her vitals were stable. Higher mental function cranial nerves normal. Motor system handgrip-weak bilaterally powerboth LL 0/5. Plantar no response. DTR- triceps jerk knee jerk ankle jerk were absent on both sides all other DTR were normal. Sensory system all modalities decreased below D4. Autonomic dysfunction was present. There was no cerebellar signno meningeal sign. The spinal vibration was decreased below T2.
Investigations: RBS- 234mgs%. Urea-67. Creatinine-1.4 mgs%. Total bilirubin-2.4mgs. Indirect bilirubin -1.2 mgs%. Clotting time˃20 minutes. Hb-7.4mgs%. Platelet - 21000/cu mm. Prothrombin time 21.6 seconds. MRI Cervical spine showed T2 hyperintensity from C5 to D5 level and reported as possibility of toxic demyelination. MRI Brain &MRAMRV-Normal. Patient was treated with IV Methyl prednisolone blood and FFP transfusion and other supportives. Mechanical ventilation and peritoneal dialysis were done.
Conclusion: Our patient had coagulopathy and renal failure following hemotoxic snake bite. At the end of first week she developed weakness of all 4 limbs with respiratory distress. MRI showed T2 hyperintense signals in cervical and dorsal spinal cords. ADEM can occur following treatment with Anti snake venum. But our case had direct toxic demyelination of spinal cord after snake bite. This case is presented for its rarity.