Introduction:
Patient factors leading to cardiac arrest (CA) in the pediatric cardiac critical care unit (CICU) are well understood, but may be unmodifiable. Our understanding of the impact of CICU organizational factors (OFs) such as staffing models, health care provider education, and CICU bed management is limited. The association between these potentially modifiable CICU OFs on CA prevention and rescue outcomes is unknown.
Hypothesis:
CICU OFs associate with CA prevention and rescue.
Methods:
Retrospective analysis of Pediatric Cardiac Critical Care Consortium (PC4) clinical registry including data for all patients admitted to CICUs from August 2014 to March 2019. Prevention was defined as the prevalence of subjects not suffering CA. Rescue was defined as survival after CA. CICU OFs were captured via questionnaire distributed to PC4 participants in 2017 (100% response). Stratified, multivariable regression was used to evaluate associations between OFs and outcome in medical and surgical admission subgroups: competing time-to-events framework (to assess prevention) and multinomial regression (to assess rescue), accounting for clustering of patients within hospitals.
Results:
We analyzed 54,521 CICU admissions (59% surgical, 41% medical) from 29 hospitals with 1398 CA events (2.5%). We studied 12 OFs that varied across centers after accounting for collinearity. For both surgical and medical admissions, lower average daily occupancy (<80%) was associated with better arrest prevention for all admissions, and better rescue in the surgical cohort. Increased proportion of nurses with >2 years experience, increased proportion of nurses with critical care certification, % of full-time intensivists, % of intensivists with critical care training, dedicated respiratory therapists, quality/safety resources, and annual CICU admission volume were not associated with improved prevention or rescue.
Conclusion:
Our multi-institutional analysis suggests that lower average CICU occupancy was the only consistent OF evaluated that was associated with CA prevention and rescue. CICUs that have average daily occupancy >80% may need specific strategies to mitigate the risks of CA.
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