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• Do not hesitate. Initiate treatment in cases of respiratory

distress immediately, even if the diagnostic work-up is

incomplete.

This may be demonstrated by the patient's:

a. Failure to oxygenate

b. Failure to ventilate

c. Failure to protect the airway

If "yes" to any of the above, intubate immediately. If the

patient cannot oxygenate, there will be anoxic injury, espe ­

cially brain injury, within seconds to minutes. The inability

to perform the act of breathing (failure to ventilate) leads

to carbon dioxide buildup, and the ensuing acidosis can

lead to cardiac dysfunction. Finally, if the patient cannot

maintain an open airway (due to brain injury, mechanical

occlusion, etc.), there will be threat to both oxygenation

and ventilation, warranting immediate intubation.

2. Is the respiratory distress rapidly reversible?

Recognizing and promptly intervening on the rapidly

reversible causes of severe respiratory distress can prevent

the need for intubation. Delays in therapy may cause the

patient to quickly decompensate. Some of these reversible

causes (and their solutions) are as follows:

Hypoxia (administer oxygen)

Bronchospasm (beta -agonists/ steroids/ epinephrine)

Hypertensive pulmonary edema (nitrates/diuresis)

Pneumothorax (needle decompression/chest tube)

Allergic reaction (steroids/ epinephrine/ antihistamine)

3. Can he run?

Imagine the patient had to run for his or her life (in

many ways, this is what the patient is doing). How

long could the patient go before he or she collapsed?

What is the patient's physiologic reserve? For example,

is the patient young and healthy or elderly with

comorbidities? Consider all of the following in this

assessment: airway, chest walUmusculature, diaphragmatic excursion, posture, age, body mass index, cardiopulmonary status, and baseline exercise tolerance.

The decision to intubate or to wait is based on the

patient's ability to maintain the work of breathing. If

the patient is stable, set time limits and reassess

response to therapy frequently. If the patient has poor

reserve or already has respiratory fatigue, it may be

wiser to intubate electively rather than during a crashing situation.

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