Hump-nosed pit viper (Hypnale hypnale) acute kidney injury: clinical serum creatinine monitoring?
Why does envenomation from the small Hump-nosed viper frequently trigger acute renal cortical necrosis despite minimal early systemic symptoms?
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3 Answers from travellers
The venom of Hypnale hypnale contains potent phospholipase A2 enzymes, procoagulant factors, and metalloproteinases. While local pain and hemorrhagic blisters appear rapidly, the critical systemic threat is venom-induced consumptive coagulopathy (VICC) paired with microthrombi formation inside renal glomeruli. This induces acute tubular necrosis and renal cortical ischemia. Patients often seem stable on day one, only to develop oliguria, dark urine, and soaring serum creatinine on days three to five. Regular 12-hour renal function panels and early hemodialysis are mandatory.
Commercial Indian polyvalent antivenom does not contain neutralizing antibodies against Hypnale venom; administering it risks severe anaphylaxis without providing therapeutic benefit.
Hydration therapy with balanced intravenous crystalloids must be started early in rural base hospitals to flush micro-protein precipitates through renal tubules.
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