What is the minimum depth for manual chest compressions?

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Multiple Choice

What is the minimum depth for manual chest compressions?

Explanation:
Depth needed to generate effective blood flow during CPR is a balance between being deep enough to compress the chest and not so deep that it causes injury. For adults, the guideline is to compress at least 2 inches (about 5 cm), but not deeper than roughly 2.4 inches (about 6 cm). This range ensures enough intrathoracic pressure to drive blood while minimizing harm to the chest structures. The option that states at least 2 inches with a caution to avoid exceeding 2.4 inches best captures this safe, effective depth. It communicates the minimum threshold and the upper limit, which helps prevent injurious over-compression. The other choices are less accurate: 1 inch is too shallow to generate adequate perfusion, 3 inches exceeds the recommended maximum and increases injury risk, and simply saying 2 inches doesn’t specify the safe upper bound.

Depth needed to generate effective blood flow during CPR is a balance between being deep enough to compress the chest and not so deep that it causes injury. For adults, the guideline is to compress at least 2 inches (about 5 cm), but not deeper than roughly 2.4 inches (about 6 cm). This range ensures enough intrathoracic pressure to drive blood while minimizing harm to the chest structures.

The option that states at least 2 inches with a caution to avoid exceeding 2.4 inches best captures this safe, effective depth. It communicates the minimum threshold and the upper limit, which helps prevent injurious over-compression. The other choices are less accurate: 1 inch is too shallow to generate adequate perfusion, 3 inches exceeds the recommended maximum and increases injury risk, and simply saying 2 inches doesn’t specify the safe upper bound.

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