Are you preparing for your exams? Here are a few points on Dengue that you may want to know!
Dengue Hemorrhagic Fever
What are the 3 stages of Dengue Hemorrhagic Fever?
- Febrile Phase
- Critical Phase
- Convalescent Phase
The Febrile Phase
SYMPTOMS:
- High fever for 2-7 days
- Facial flushing
- Skin erythema
- Arthralgia
- Headache
- Sore throat
SIGNS:
Tender hepatomegaly (suggestive of DHF)
LAB:
- Leucopenia (WBC<5000)
- Mild thrombocytopenia (<150,000)
- PLT<100,000 indicate entry to the critical phase
The Critical Phase
SYMPTOMS:
- Usually occurs around the 5-6th day and lasts for 48 hours
- Also includes petechiae, echymosis, purpura and bleeding from mucosa and injection sites
SIGNS:
Bleeding manifestation (not a must)
LAB:
- PIt < 100,000
- Evidence of plasma leakage
- Increased PCV > 20% rise from base line PVC (M – 40, F-36)
- Ultrasound Scan (USS) – Free Fluids (FF)
- CXR (right lateral decubitus film) – Effusion Js. Alb < 3.5 g/di
- Non-fasting S. Cholesterol < 100mg/dl
The Recovery Phase
SYMPTOMS:
- Occurs during the last 2-5 days
- There is improvement of general well being and appetite
SIGNS:
- Convalescent rash
- Generalized itching
- Haemodynamic stability
- Bradyacrdia (in some pts) diuresis
LAB:
- Stabilization of HCT (even I due to reabsorption of extravasated fluid)
- †wBc
- †PLT
Symptoms of Shock
- Sweating
- Abdominal pain
- Persistent vomiting
- Restlessness/altered conscious level
- Postural dizziness
- Decreased urine output (<0.5 ml/kg/hour)
Signs of Shock
- Cold extremities
- Prolonged capillary refill time > 2 seconds
- Unexplained tachycardia
- Tender hepatomegaly > 2 cm
- Increasing diastolic pressure
- Narrowing of pulse pressure < 20mmHg
