Envenomation Category | Definition |
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Minimal | Swelling, pain, and ecchymosis limited to the immediate bite site; Systemic signs and symptoms absent; Coagulation parameters normal with no clinical evidence of bleeding. |
Moderate | Swelling, pain, and ecchymosis involving less than a full extremity or, if bite was sustained on the trunk, head or neck, extending less than 50 cm; Systemic signs and symptoms may be present but not life threatening, including but not limited to nausea, vomiting, oral paresthesia or unusual tastes, mild hypotension (systolic blood pressure >90 mmHg), mild tachycardia (heart rate <150), and tachypnea; Coagulation parameters may be abnormal, but no clinical evidence of bleeding present. Minor hematuria, gum bleeding and nosebleeds are allowed if they are not considered severe in the investigator's judgment. |
Severe | Swelling, pain, and ecchymosis involving more than an entire extremity or threatening the airway; Systemic signs and symptoms are markedly abnormal, including severe alteration of mental status, severe hypotension, severe tachycardia, tachypnea, or respiratory insufficiency; Coagulation parameters are abnormal, with serious bleeding or severe threat of bleeding. |