When performing CPR on an adult how deep should the chest compression be?

UPPSC 2017

Nursing Foundation

Easy

Appeared in: UPPSC 2017

Explanation

The recommended chest compression depth for an adult is at least 2 inches (5 cm) but should not exceed 2.4 inches (6 cm), as per American Heart Association (AHA) guidelines.
This specific depth is crucial for generating sufficient intrathoracic pressure to circulate blood to the brain and other vital organs during a cardiac arrest.
Among the given choices, 2 inches is the only option that falls within the correct and safe therapeutic range for adult CPR.

Option A: A depth of 1½ inches (approximately 4 cm) is too shallow for an adult and will not provide effective circulation. This would result in inadequate perfusion of vital organs.
Option C: A depth of 2½ inches (approximately 6.35 cm) exceeds the recommended maximum depth of 2.4 inches (6 cm). Compressing too deeply increases the risk of iatrogenic injuries like rib fractures, sternal fractures, and damage to underlying organs.
Option D: A depth of 3 inches is excessively deep and dangerous. It carries a very high risk of causing severe internal trauma, including life-threatening injuries to the lungs, heart, and liver.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Cardiopulmonary Resuscitation (CPR) Technique as background academic context rather than a clinical decision trigger.
Performing high-quality CPR is a fundamental skill for all nurses and healthcare providers. The quality of CPR, particularly compression depth and rate, is a primary determinant of patient survival after cardiac arrest.
Modern defibrillators and CPR feedback devices provide real-time data on compression depth and rate, helping rescuers adhere to guidelines and improve performance during a resuscitation event.
What if the patient is extremely frail or has severe osteoporosis? The recommendation remains the same. The rescuer must prioritize effective circulation by compressing to the proper depth, as the risk of death from ineffective CPR is greater than the risk of rib fractures.

How to Approach the Question

First, identify the core of the question: it's asking for a specific, factual parameter of a standard medical procedure (CPR depth).
Recall the Basic Life Support (BLS) guidelines for an adult patient.
Mentally review the key components of high-quality CPR: rate, depth, and recoil.
Compare the given options to the established standard. The standard for adult depth is 2 to 2.4 inches (5-6 cm).
Eliminate options that are clearly incorrect: 1½ inches is for infants, and 3 inches is excessively deep.
Between 2 inches and 2½ inches, recognize that 2 inches is the minimum effective depth and a standard answer, while 2½ inches exceeds the recommended maximum, making it incorrect and potentially harmful.

Concept Tested & Keywords

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