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The patient’s history and account of the injury, observation of fang marks, snake identification (when possible), and progressive symptoms of envenomation all point to poisonous snakebite. Laboratory test results help identify the extent of envenomation and provide guidelines for supportive treatment.
Abnormal test results in poisonous snakebites may include:
❑ prolonged bleeding time and partial thromboplastin time
❑ decreased hemoglobin level and hematocrit
❑ sharply decreased platelet count (less than 200,000/mm">3)
❑ urinalysis disclosing hematuria
❑ increased white blood cell count in victims who develop an infection (a snake’s mouth typically contains gram-negative bacteria)
❑ pulmonary edema or emboli as shown on chest X-ray
❑ possibly tachycardia and ectopic heartbeats on the electrocardiogram (usually necessary only in cases of severe envenomation for a patient older than age 40)
❑ possibly abnormal EEG findings in cases of severe envenomation.
Source: Professional Guide to Diseases (Eighth Edition), 2005
The patient’s history and account of the injury, observation of fang marks, snake identification (when possible), and progressive symptoms of envenomation all point to poisonous snakebite. Laboratory test results help identify the extent of envenomation and provide guidelines for supportive treatment.
Abnormal test results in poisonous snakebites may include the following:
❑ prolonged bleeding time and partial thromboplastin time
❑ decreased hemoglobin and hematocrit values
❑ sharply decreased platelet count (less than 200,000/µl)
❑ urinalysis disclosing hematuria
❑ increased white blood cell count in victims who develop an infection (the mouth of a snake typically contains gram-negative bacteria)
❑ pulmonary edema as shown on chest X-ray
❑ possibly tachycardia and ectopic heartbeats on the electrocardiogram (usually necessary only in cases of severe envenomation for a patient older than age 40)
❑ possibly abnormal EEG findings in cases of severe envenomation.
Source: Handbook of Diseases, 2003
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