What should be the depth of chest compression in an Adult during CRR?

Appeared in: MP CHO-2018

Explanation

According to the American Heart Association (AHA) guidelines, the recommended chest compression depth for an adult is at least 5 cm (2 inches) but no more than 6 cm (2.4 inches).
This depth is crucial for generating sufficient blood flow to the brain and heart during cardiac arrest.
Among the given choices, the 5-7 cm range is the only option that correctly includes the recommended 5-6 cm depth.

Option A: A depth of 2-3 cm is significantly too shallow for an adult and would result in ineffective CPR, failing to generate adequate circulation.
Option B: A depth of 3-4 cm is insufficient for an adult. This depth is closer to the recommendation for infants (approximately 4 cm).
Option C: A depth of 4-5 cm is still too shallow for an adult. The minimum recommended depth is 5 cm. This range is more appropriate for a child.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain CPR chest compression depth for adults as background academic context rather than a clinical decision trigger.
Performing chest compressions at the correct depth is a critical nursing skill that directly impacts patient survival from cardiac arrest by ensuring adequate coronary and cerebral perfusion.
Compressions deeper than 6 cm should be avoided as they increase the risk of iatrogenic injuries like rib fractures or lung damage without improving outcomes.
What if? If the patient were an infant (less than 1 year old), the correct compression depth would be approximately 4 cm (1.5 inches), or about one-third of the chest's anterior-posterior diameter, and would be performed with two fingers or the two-thumb-encircling-hands technique.

How to Approach the Question

This is a factual recall question based on established clinical guidelines (AHA CPR guidelines).
First, identify the key parameters in the question: 'Adult' and 'depth of chest compression'.
Recall the specific numerical value for adult CPR compression depth from your training.
The standard recommendation is 5 cm to 6 cm.
Compare this recalled value with the given options.
Select the option that best matches or encompasses the correct range. In this case, 5-7 cm is the only option that includes the 5-6 cm recommendation.

Concept Tested & Keywords

QIfVJ8T4G_yXpYAdlnYLfh

E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 610-612

Practise the full MP CHO-2018

Attempt every question from this paper in a timed mock, then review the full solution for each one.