Chest Compression Fraction in Pediatric Resuscitation
Chest compression fraction (CCF) is the proportion of total resuscitation time during which chest compressions are actively being performed, and you should target a CCF of at least 80% during pediatric cardiac arrest to maximize coronary perfusion and improve survival outcomes. 1
Definition and Calculation
CCF represents the cumulative time spent providing chest compressions divided by the total duration of the resuscitation attempt. This metric quantifies how much of the arrest time is spent delivering the critical intervention—chest compressions—versus pauses for other activities 2.
The calculation is straightforward:
- CCF = (Total time compressions performed) ÷ (Total resuscitation time) × 100%
- Example: If compressions are delivered for 8 minutes during a 10-minute resuscitation, CCF = 80%
Why CCF Matters
High-quality CPR generates blood flow to vital organs and increases the likelihood of return of spontaneous circulation (ROSC). Maximizing chest compression fraction is one of the five main components of high-quality CPR, alongside adequate compression depth, optimal compression rate, allowing full chest recoil, and avoiding excessive ventilation 1. The 2020 AHA Guidelines explicitly identify minimizing interruptions in CPR—which directly translates to maximizing CCF—as critical for pediatric resuscitation 1.
Target CCF Values
The American Heart Association recommends achieving a CCF of at least 60%, with high-performance resuscitation defined as CCF greater than 80% 3, 2. Research demonstrates that in pediatric in-hospital cardiac arrest, when at least 60% of 30-second epochs achieve adequate compression depth, there are improved rates of ROSC and 24-hour survival 1.
Real-world data shows this is achievable: one study found mean CCF of 71.6% ± 7.5% during actual pediatric resuscitations 2, while another quality improvement initiative successfully increased CCF from 66% to 81% during the surgical phase of pediatric ECPR 4.
Optimizing CCF: Practical Strategies
Minimize Pause Duration
Rhythm checks should last no more than 10 seconds and occur approximately every 2 minutes 1. Adult and pediatric studies have identified harmful CPR pauses during manual pulse checks by trained rescuers, with healthcare provider pulse palpation accuracy only 78% 1.
The most significant sources of excessive pause time include:
- Auscultation (median excess time: 13 seconds)
- Intubation (median excess time: 7.5 seconds) 3
Address Factors That Reduce CCF
Research identifies specific factors that negatively correlate with CCF 2:
- Longer resuscitation duration (R = -0.55, p < 0.001)
- More people giving compressions (R = -0.48, p < 0.001)
- Larger total team size (R = -0.50, p < 0.001)
- Daytime resuscitations (69.2% vs 75.8% at night, p = 0.001)
- Use of defibrillator (67% vs 72.6% without, p = 0.005)
Quality Improvement Interventions
Simple, feasible communication strategies can dramatically improve CCF without prolonging resuscitation time 4. Effective interventions include:
- Share real-time CCF data with all ECPR stakeholders
- Establish consensus on specific areas needing improvement
- Create communication aids that encourage counting pauses out loud
- Conduct multidisciplinary simulations to practice minimizing interruptions
One pediatric center reduced median pause length from 20 seconds to 10.5 seconds (p = 0.01) and increased CCF during ECMO cannulation from 66% to 81% (p = 0.02) using these strategies, with no increase in cannulation time 4.
Common Pitfalls to Avoid
Do not allow excessive pauses for procedures. The evidence shows that interruption time excess—the difference between actual pause duration and guideline-indicated allowable duration—is the primary driver of suboptimal CCF 3. When comparing actual CCF to "CCF potential" (what could be achieved by eliminating excess pause time), there is an absolute 7.6% difference (76% vs 83.4%, p < 0.001) 3.
Avoid the misconception that more team members improve performance. Counterintuitively, larger teams and more people rotating through compressions correlate with lower CCF 2. This likely reflects coordination challenges and communication breakdowns.
Do not delay compressions for pulse checks beyond 10 seconds. Healthcare providers checking for pulses in infants and children should begin compressions unless a definite pulse is felt within 10 seconds 1.
Measurement Considerations
While various methods exist for calculating CCF (first 3 minutes, first 5 minutes, entire episode, etc.), automated CCF determination across the entire resuscitation episode correlates well with other calculation methods and may prove sufficient for evaluating CPR quality 5. The key is consistent measurement and feedback to drive improvement.
Use real-time feedback devices when available to help rescuers optimize compression rate, depth, and minimize pauses 6. These devices provide immediate data that can guide performance during the resuscitation itself.