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Management of Dengue Infection

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When should an ABG test be repeated?

When should an ABG test be repeated?

An Arterial Blood Gas (ABG) test should be repeated based on clinical indications to monitor and guide patient management. Common scenarios for repeating the test include:

  • Deterioration in Patient's Condition: If a patient shows worsening signs such as respiratory distress, altered mental status, or abnormal vital signs, repeating an ABG can identify any changes in oxygenation, ventilation, or acid-base balance.
  • Response to Treatment: After initiating or modifying therapies like oxygen supplementation, mechanical ventilation, or administration of bicarbonates, repeating ABG helps evaluate the effectiveness of the intervention.
  • Monitoring Critical Parameters: Patients in intensive care units (ICUs) or those with conditions like sepsis, acute respiratory distress syndrome (ARDS), or organ failure often require serial ABGs to ensure that parameters like pH, PaCO2, and PaO2 remain within target ranges.
  • Procedures Impacting Respiratory or Metabolic Functions: Repeating ABG may be necessary post-procedures like intubation, extubation, or surgery, especially when these impact breathing or circulation.
  • Severe Acid-Base Imbalances: When managing conditions like metabolic acidosis or alkalosis, repeat ABGs can track the progression and recovery of acid-base homeostasis.
ABG repetition should always align with the clinical context to avoid unnecessary tests and patient discomfort.


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