Clinical manifestations vary between species of snakes. Some toxins in venom exert local effects such as swelling, blistering, bruising, and necrosis at the bite site. Other toxins can be distributed systemically through lymphatics and blood vessels and act at distant sites. Common systemic effects include bleeding, paralysis, generalised rhabdomyolysis, and acute kidney injury. Venom injection deep into a limb can cause tissue swelling in the tightly constrained space and compromise neurovascular function. This manifests as “acute compartment syndrome.”
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Diagnostic Criteria for Nonviable Pregnancy Early in the First Trimester
New criteria for the use of ultrasonography to assess prenatal viability, introduced by the Society of Radiologists in Ultrasound, will help ensure obstetricians are not too hasty in determining that an embryo has ceased developing.