Which assessment of a patient in shock would give the nurse the most valuable information to determine there is adequate tissue perfusion?

Choice A reason:

Applying oxygen at 100% is an important step in managing a patient with a life-threatening chest injury. However, ensuring a patent airway is the first priority, as it is crucial to maintain airway patency to facilitate oxygen delivery. Without an open airway, oxygen administration would be ineffective.

Choice B reason:

Assessing the heart rate is part of the initial assessment in emergency care. However, the priority is to ensure a patent airway, as a compromised airway can lead to hypoxia and rapid deterioration of the patient's condition. Heart rate assessment can follow once airway patency is confirmed.

Choice C reason:

Ensuring a patent airway is the top priority in the emergency management of a patient with a life-threatening chest injury. Airway patency is essential for effective ventilation and oxygenation. If the airway is obstructed, the patient cannot receive oxygen or expel carbon dioxide, leading to life-threatening complications.

Choice D reason:

Starting two large-bore IV lines is important for fluid resuscitation and medication administration. However, the primary focus should be on ensuring a patent airway, as immediate airway management is critical to the patient's survival in the acute phase of a life-threatening chest injury.

Choice A reason:

Lower levels of arterial carbon dioxide do not directly facilitate brain oxygenation. While maintaining appropriate CO2 levels is important for overall respiratory function, the primary reason for targeting a specific PaCO2 range in traumatic brain injury is related to intracranial pressure control.

Choice B reason:

Although carbon dioxide is indeed a waste product that must be eliminated from the body, this statement does not explain why specific PaCO2 levels are targeted in the context of traumatic brain injury. The primary concern is the impact of CO2 on intracranial pressure.

Choice C reason:

Carbon dioxide is a potent vasodilator, and elevated levels can lead to increased intracranial pressure (ICP). By maintaining PaCO2 within a range of 35-38 mmHg, the healthcare provider aims to prevent hypercapnia and the resulting vasodilation, which can exacerbate intracranial hypertension in patients with traumatic brain injury.

Choice D reason:

Lower levels of arterial carbon dioxide are not specifically essential for gas exchange. The primary concern with PaCO2 management in traumatic brain injury is controlling intracranial pressure, rather than optimizing gas exchange alone.