Figure 1.

Compression quality compliance rates among emergency healthcare professionals during 120-second cardiopulmonary resuscitation (CPR) (n=118). Box plots showing compliance rates for compression depth (5-6 cm), instantaneous compression frequency (100-120 compressions per minute), and complete chest recoil. The overall compliance rate refers to the proportion of compressions that simultaneously fulfilled all three criteria: depth, instantaneous frequency, and complete chest recoil.

Figure 2.

Three-dimensional visualization of compression depth and instantaneous frequency over time during manual CPR. A: a three-dimensional plot illustrating compression depth and instantaneous frequency over time from a single randomly selected healthcare professional (ID 022); B: a composite three-dimensional plot of all compressions performed by healthcare professionals, showing that the majority fell outside the “compliance cube.” The “compliance cube” denotes the target range for high-quality CPR, defined as a compression depth of 5-6 cm and an instantaneous compression frequency of 100-120 compressions per minute (cpm). Non-colored scatter points and lines falling outside this cube represented compressions that failed to meet one or both criteria.