Which is an indication for arterial puncture?

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Multiple Choice

Which is an indication for arterial puncture?

Explanation:
Arterial puncture is indicated when you need an arterial blood gas to evaluate oxygenation, ventilation, and acid-base balance. Arterial blood provides the true PaO2, PaCO2, and pH that reflect how well the lungs are exchanging gases and how the body's acid-base status stands. Venous blood, while useful for many tests, does not reliably represent arterial oxygen levels or ventilation, so it cannot substitute for ABG in assessing respiratory status or metabolic/respiratory disorders. The other listed tests (like CBC or fasting glucose) are typically obtained from venous blood and do not require arterial sampling, which is reserved for ABG analysis.

Arterial puncture is indicated when you need an arterial blood gas to evaluate oxygenation, ventilation, and acid-base balance. Arterial blood provides the true PaO2, PaCO2, and pH that reflect how well the lungs are exchanging gases and how the body's acid-base status stands. Venous blood, while useful for many tests, does not reliably represent arterial oxygen levels or ventilation, so it cannot substitute for ABG in assessing respiratory status or metabolic/respiratory disorders. The other listed tests (like CBC or fasting glucose) are typically obtained from venous blood and do not require arterial sampling, which is reserved for ABG analysis.

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