Severe Acute Kidney Injury Following Sri Lankanhypnalespp. Envenoming Is Associated With Thrombotic Microangiopathy
CLINICAL TOXICOLOGY(2021)
摘要
Context Acute kidney injury (AKI) is the most serious clinical manifestation of the Sri Lankan hump-nosed pit viper (Hypnalespp.) bites. Thrombotic microangiopathy (TMA) is increasingly recognized in association with AKI in cases ofHypnalespp envenomation. We investigated AKI in a cohort of cases ofHypnaleenvenomation, its association with TMA and the early diagnostic value of common biomarkers for AKI occurring. Materials and methods We conducted a prospective observational study of suspected viper bites and included 103 confirmed cases ofHypnaleenvenomation, based on venom specific enzyme immunoassay of blood. AKI was defined using the Kidney Disease: Improving Global Outcomes (KDIGO) criteria. Thrombotic microangiopathy was diagnosed based on thrombocytopenia (platelet count < 150,000 x 10(3)/mu L) and microangiopathic haemolytic anaemia (MAHA). We investigated the diagnostic performance of creatinine, platelet count and INR for AKI within 4 h and 8 h post-bite by area under the receiver operator characteristic curve (AUC-ROC). Results Ten patients developed AKI: seven AKI stage 1 and three AKI stage 3. Ten patients (10%) developed thrombocytopaenia while 11 (11%) had MAHA. All three AKI stage 3 had thrombocytopaenia and MAHA fulfilling the criteria for TMA. Two of them presented with oliguria/anuria and all three required haemodialysis. Serum creatinine within 4 h post-bite was the best predictor of AKI with AUC-ROC of 0.83 (95% CI: 0.67-0.99) and was no better within 8 h of the bite. Conclusions We found that AKI is uncommon inHypnalespp. envenomation, but an important serious complication. Severe AKI was associated with TMA. A creatinine within 4 h post-bite was the best predictor of AKI.
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关键词
Hump-nosed pit viper, Hypnalespecies, acute kidney injury, thrombotic microangiopathy, Sri Lanka
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