Answer :

Final answer:

Suction via an endotracheal tube should not exceed 10-15 seconds to clear secretions without causing hypoxia or airway damage, especially when reestablishing negative chest pressure in medical procedures.

Explanation:

When suctioning with an endotracheal tube (ETT), it is critical to limit the duration of suctioning to prevent hypoxia and potential damage to the airways. In clinical practice, suction should be applied for no longer than 10-15 seconds. During this process, the goal is to clear secretions while maintaining adequate oxygenation and preventing trauma. When reestablishing negative pressure in the chest cavity during surgery or for trauma victims, suction is used to remove any air and fluids that may prevent the lungs from inflating properly.

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