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Four Grades of DHF
- Grade 1
- Fever and nonspecific constitutional symptoms
- Positive tourniquet test is only hemorrhagic manifestation
- Grade 2
- Grade 1 manifestations + spontaneous bleeding
- Grade 3
- Signs of circulatory failure (rapid/weak pulse, narrow pulse pressure, hypotension, cold/clammy skin)
- Grade 4
- Profound shock (undetectable pulse and BP)
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There are four grades of DHF. For all grades the four criteria
for DHF must be met.
- In Grade 1, fever and nonspecific constitutional symptoms
are present and the only hemorrhagic manifestation is provoked,
that is, a positive tourniquet test (which will soon be
described).
- In Grade 2, in addition to the Grade I manifestations,
there is spontaneous bleeding.
- Grades 3 and 4 are Dengue Shock Syndrome. Grade 3 is incipient
shock with signs of circulatory failure.
- In Grade 4, the patient has profound shock, with undetectable
pulse and blood pressure.
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