Cardiopulmonary resuscitation (CPR) is a common therapy in the
intensive care unit (ICU), and begins with standard advanced cardiac
life support (ACLS) algorithms as published by American Heart Association
guidelines, which were designed for application in non-ICU settings,
often proceeding to more advanced therapies.
- ▪ Respiratory arrest: Cessation of effective breathing
due to a variety of causes including airway obstruction, drugs,
central nervous system pathology, or intrinsic pulmonary disease
- ▪ Cardiac arrest: Cessation of effective circulation due
to a variety of causes including arrhythmias, primary cardiac muscle
failure, pericardial disease, thoracic pathology (ie, pneumo- or hemothorax),
and circulatory incompetence (ie, hemorrhage, sepsis, anaphylaxis)
- ▪ Airway: The establishment of a patent airway
- ▪ Breathing: Encompasses both ventilation and oxygenation
- ▪ Circulation: Encompasses both cardiac and vascular function
- ▪ The indications for CPR in an ICU are identical to
those in any other setting, that is, loss of airway, breathing,
- ▪ As with resuscitation in any patient, advanced directive
should be evaluated prior to initiation of resuscitation to ascertain
whether there are any limitations to such as “Do not intubate” or “No cardiopulmonary
- ▪ In many cases, the need for intervention will be identified
by an alarm from one of the bedside physiologic monitors unless
cardiac or respiratory arrest is witnessed.
- —Respiratory arrest—typically identified
by pulse oximeter alarm, bradycardia, or respiratory rate alarm.
- —Cardiac arrest or arrhythmia—identified
by automated arrhythmia detection or blood pressure alarm.
- ▪ In the event of respiratory arrest, the patient should
be assessed for the presence or absence of spontaneous respiratory
efforts and airway patency.
- —A patent airway should be established using
maneuvers such as head and neck positioning, oral or nasal airways,
and endotracheal intubation if appropriate.
- —Ventilation should be established with a resuscitation
bag and/or mechanical ventilator if appropriate.
- ▪ In the event of cardiac arrest, the patient should
be assessed for the presence or absence of an effective electrical
- —In the event that there is a rhythm, the patient
should be assessed for a pulse either by palpation, manometry, or
arterial line tracing.
- —If there is an effective rhythm, but no pulse,
the typical causes for electromechanical dissociation should be
assessed including tension pneumothorax, pericardial tamponade,
- —In the event that an effective rhythm is absent,
initial resuscitations should be directed toward the resumption
of circulation using chest compressions (Figure 8-1), pacing, defibrillation
(Figure 8-2), and/or cardioversion as warranted.
- ▪ Blood tests should be secured as soon as feasible
to evaluate oxygenation; ventilation; acid-base status; serum hemoglobin;
and electrolytes, including potassium, magnesium, and calcium.
- ▪ Resuscitation should proceed in accordance with ACLS algorithms
to the extent they are applicable in specific ICU patients.
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