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HKCEM College Tutorial. Get hurt while hiking. Author Dr. Tommy Lam Shing Kit Nov., 2013. Triage (Category II). Female 40 year old Hiking with friends weekend Get hurt over left ankle in grass ? Bitten BP 158/94 Pulse 100/min Temp 37.2 °C. Assessment.
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HKCEM College Tutorial Get hurt while hiking Author Dr. Tommy Lam Shing Kit Nov., 2013
Triage (Category II) • Female 40 year old • Hiking with friends weekend • Get hurt over left ankle in grass • ? Bitten • BP 158/94 • Pulse 100/min • Temp 37.2 °C
Assessment • Assess and stabilize ABC if necessary
Physical Exam • Is it a snake bite ? • Is it a dry bite/ non venomous snake bite ? • Is there envenomation ? • Local sign and symptom? • Systemic sign and symptom ?
Physical Exam • Fang mark , Number of fang mark ? • Swelling ? Longitudinal and involved joint • Progression ? Mark by “marker” at different time or taking photo • Clinical compartment syndrome? • Ecchymosis ? • Blisters? • Necrosis?
Snake identification • History taking • Any snake specimen available ? • What we can do if in doubt on the snake specimen ? • Consult snake identification from KadoorieFarm & Botanic Garden (KFBG)
Poisonous snake in HK • Viperidae • Colubridae • Elapidae • Hydrophidae
Local features • Pain • Bruising • Blister • Necrosis
Systemic features • Bleeding tendency • Oozing from the wound
Neuromuscular • Breathing difficulty • Paresthesia • Ptosis, diplopia • Dysphagia • Muscle weakness
Investigation • Complete blood picture (especially Platelet count) • Renal and liver function test • Clotting profile • Fibrinogen • ECG • Urine for RBC Need serial blood tests if present too early
Treatment • Remove constricting object from injured part or limbs (e.g. remove ring if bitten finger) • Dressing • ATT • Analgesic • Antibiotic for infected wound or significant local reaction • Antivenom
Some Poisonous Snake in HK • Green Pit Viper/ Bamboo Snake/Cryptelytropsalbolabris/青竹蛇
Some Poisonous Snake in HK • Chinese Cobra/Najaatra/眼鏡蛇/飯鏟頭
Some Poisonous Snake in HK • King Cobra/Ophiophagushannah/眼鏡王蛇, 過山烏
Some Poisonous Snake in HK • Many-banded Krait/Bungarusmulticinctus/銀腳帶
Some Poisonous Snake in HK • Banded Krait/Bungarusfasciatus/金腳帶
Some Poisonous Snake in HK • Red-necked Keelback/ Rhabdophissubminiatus/紅脖游蛇
Pretreatment • Antihistamine -- Piriton (Chlorpheniramine) • Hydrocortisone • Watch out for anaphylaxis or anaphylactoid reaction
Our patient • Present with mild wound pain and snake specimen confirmed Green Pit Viper • Observation after 24 hours • Pain controlled by analgesics • Serial blood tests revealed no systemic involvement • Discharge uneventfully