Guideline for the Management of Snakebite Venom

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GUIDELINE FOR THE MANAGEMENT OF SNAKEBITE VENOM Cytotoxic Neurotoxic Mixed cytotoxic and neurotoxic Haemotoxic Puff adder, Gaboon adder, spiting cobras Black and green mamba, Snake (Mozambique, black-necked, black, zebra), Rinkhals, berg adder, Peringuey’s adder, Boomslang, vine snake non-spitting cobras (snouted, Stiletto snakes (Bibron’s and Congo), desert mountain adder, garter snakes, (eastern and savanna) species Cape, forest, Anchieta’s) night adders, horned and many horned adders, shield-nose snake lowland swamp viper Dominant Painful progressive swelling (PPS) clinical Progressive weakness (PW) Bleeding may occur in puff adder bites Combined PPS and PW. Bleeding (B) presentation (thrombocytopenia) and Gaboon adder bites PPS occurs in non-spitting cobra bites of victim (consumption coagulopathy). * Suction or nil. Non-spitting cobras: pressure immobilisation or arterial tourniquet. Mambas: arterial tourniquet. Polyvalent antivenom * Suction or nil. * Suction or nil. First aid for the triad of perioral paraesthesia, excessive salivation * Suction or nil. or metallic taste and sweating OR difficulty in breathing. Artificial restpiration may be necessary. Take the patient to hospital or nearest medical help Intravenous fluids Supportive Oxygen by mask or ventilation. Blood or blood component Elevate bitten limb ** See cytotoxic and neurotoxic treatment Analgesia Protect the airway. therapy Antivenom may Puff adder, spitting cobras, Rinkhals Bloomslang be necessary for Gaboon adder All species threat to limb or life *** Antivenom type Polyvalent Polyvalent Polyvalent Boomslang monospecific Suggested dose by 50 ml: puff adder and spitting cobras 80 ml (40-200 ml) 50 ml 10-20 ml 200 ml: Gaboon viper Small doses may lead to a recurrence intravenous injection of symptoms Percentage bites antivenom < 10% 50-70% < 10% 80-100% indicated in * Suction is of minimal benefit but reassuring to the patient. ** Some authors prefer keeping the bitten limb at heart level. *** Polyvalent antivenom is effective against the bites of the mambas, cobras, rinkhals, puff adder and Gaboon adder only. A test dose of antivenom is not indicated..

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