Local

Systemic

Coagulation

Minimal

Swelling, erythema or ecchymoses confined to site of bite

No coagulation signs or symptoms

No coagulation abnormalities or other important laboratory abnormalities

Moderate

Progress of swelling, erythema or ecchymosis beyond the site of bite

Non life threatening signs and symptoms (Nausea, vomiting, perioral paraesthesia, myokymia & mild hypotension)

Mildly abnormal coagulation profile, clinically significant bleeding and mild abnormalities on other tests

Severe

Rapid swelling, erythema or ecchymosis involving the entire body part

Markedly severe signs and symptoms (hypotension?SBP < 90 mmHg, altered sensorium, tachycardia, tachypnoe and respiratory distress)

Markedly abnormal coagulation profile with evidence of bleeding or threat of spontaneous hemorrhage, (unmeasurable INR, a PTT & fibrinogen and severe thrombocytopenia < 20,000/cmm)