Experience of Snakebite Envenomation by a Desert Viper in Qatar

Table 1

Assessment of severity of envenomation.

No envenomation	Absence of local or systemic reactions; fang marks (±)
Mild envenomation	Fang marks (+), moderate pain, minimal local edema, erythema (+), ecchymosis (±), and no systemic reactions (hemoglobin, platelets, prothrombin time, and fibrinogen are normal)
Moderate envenomation	Fang marks (+), severe pain, moderate local edema erythema and ecchymosis (+), systemic weakness, sweating, syncope, nausea, vomiting, anemia, or thrombocytopenia
Severe envenomation	Fang marks (+), severe pain, severe local edema, erythema and ecchymosis (+), hypotension, paresthesia, coma, pulmonary edema, and respiratory failure